Class / Patent application number | Description | Number of patent applications / Date published |
324225000 | With compensation for test variable | 44 |
20080246468 | METHOD AND ALGORITHMS FOR INSPECTION OF LONGITUDINAL DEFECTS IN AN EDDY CURRENT INSPECTION SYSTEM - A collection of data processing algorithms which, used in concert, are suitable for use in place of a high pass filter stage in an eddy current inspection system and provide for a system optimized to inspect test pieces for elongated defects running parallel to the scan axis. The algorithms use mathematical techniques to eliminate baseline impedance offset between test pieces, correct for offset drift during a scan, and allow for system balancing using only a set of test pieces of unknown quality. | 10-09-2008 |
20080278152 | Disturbance Elimination System for Inductive Sensors - The invention relates to a disturbance elimination system for inductive sensors for monitoring the movement of mobile objects, including an inductive element formed by two magnetically-opposed identical half-coils (L | 11-13-2008 |
20080309328 | AUTOMATIC LIFT-OFF COMPENSATION FOR PULSED EDDY CURRENT INSPECTION - Variations in the lift-off separation between a probe and the surface of a structure to be tested often mask the detection of defects in the structure. A method and apparatus for automatically classifying and compensating for variations in the lift-off is described. A reference signal at a known lift-off may be weighted by a corresponding calculated ratio parameter and subtracted from a test signal to compensate for lift-off. A number of reference signals are preferably obtained and the largest magnitude gradient for each reference signal is preferably determined. The largest magnitude gradient for subsequent test signals is also obtained and the corresponding reference signal with the closest largest magnitude gradient to the test signal is identified and the corresponding reference signal is selected in the related compensation procedure. Such a method has been found to restore the signal such that lift-off is removed and defects are easily identified. | 12-18-2008 |
20090001975 | APPARATUS AND METHOD FOR NON-SYMMETRIC MAGNETIC FIELD BALANCING IN AN INSPECTION SCANNER - An inspection system positions a balancing shim to asymmetrically balance a magnetic field generated by an inductive sensor, which forms part of the inspection system. Additionally, relays and capacitors used to tune the inductive sensor to a desired resonance frequency are geometrically arranged to minimize electrical interference generated by operation of the relays and capacitors. A shielding device, which may be formed on a printed circuit board, protects a magnetic field generated by the inductive sensor from external electromagnetic interference. A slot positioned in the inductive sensor may be used to tune a resonant mode of the inductive sensor to accurately and particularly detect metallic shanks and/or other metallic objects in shoes, socks, and/or clothing. | 01-01-2009 |
20090243603 | Device for Measuring Magnetic Particles and Corresponding Method - The invention concerns a device for the qualitative or quantitative measurement of a magnetically labelled analyte. The device includes a coil arrangement for measuring the analyte from a sample absorbed in a test base. The coil arrangement includes at least one measuring coil and a reference coil arranged in connection with it. From the signal of the coil arrangement a change in inductance correlating to the content of the magnetically labelled analyte is arranged to be detected. The change in inductance is arranged to be detected from a change (ΔA, Δφ) in amplitude and/or phase appearing in the output signal of the coil arrangement, which is arranged to be measured at the frequency of the input signal. In addition, the invention also relates to a corresponding method. | 10-01-2009 |
20090289624 | Method for determining and evaluating eddy-current displays, in particular cracks, in a test object made from an electrically conductive material - A method for determining and evaluating eddy-current displays, in particular cracks, in a test object made from an electrically conductive material is provided. The method uses the following steps, applying an alternating electromagnetic field of a predetermined constant or variable frequency to the test object, detecting the eddy currents induced in the test object along predetermined parallel measuring tracks, providing eddy-current signals each eddy-current signal is assigned to a measuring track, conditioning the eddy-current signals and providing conditioned measured variables, interpreting the conditioned measured variables using a predetermined evaluation algorithm, and providing synthetic crack signals. | 11-26-2009 |
20100117637 | SENSOR CIRCUIT - Provided is a sensor circuit that is small in circuit scale, but is capable of temperature compensation. A reference voltage circuit (BL | 05-13-2010 |
20100308811 | Magnetic field compensation - A device for compensating magnetic fields, comprising a single magneto resistive sensor to which at least two parallel measuring amplifier loops are connected in series, one being an analogue broadband controller loop and the other being a digital broadband controller loop. | 12-09-2010 |
20100321010 | MAGNETIC FIELD SENSOR - A magnetic field sensor assembly ( | 12-23-2010 |
20110101971 | Method and apparatus for estimating the condition of a coating on an underground pipeline - Methods are provided for reducing interference from stray currents in buried pipelines/metal structures during MEIS testing or other current-sensing applications in the pipeline. Methods are also provided for measuring bulk complex electrical impedance between a buried pipe and the soil, thereby rendering an indication of the quality of the anti-corrosive coating. Methods are also provided for measuring the complex propagation constant of AC voltages propagating along an attenuative pipeline. This information is useful for assessing the general condition of the anti-corrosive coating involved, or to enhance MEIS inspection of the pipeline. Methods are also provided for enhancements to MEIS testing, including (a) canceling magnetometer offset effects associated with the Earth's magnetic field after the magnetometer is positioned for measurement, (b) implementing a separate sensing connection to the pipe so as to avoid interference from voltage loss in the pipe feed-line connection, (c) providing a power amplifier to excite the pipe with large amplitude signals. | 05-05-2011 |
20110227565 | MAGNETIC SENSOR FOR DETERMINING WEAR - An apparatus and method for detecting wear of a surface of an object or part, and directing the measured amount of wear to an interface such that an operator may be apprised of this value are described. One end of the sacrificial wear sensor hereof is disposed such that it experiences the same wear as the surface of the part to be monitored. One embodiment of the present sensing element includes a permanent magnet fixedly sandwiched between two plates having high magnetic permeability material, wherein magnetic poles are oriented perpendicular to the plates. The plates extend beyond the magnet on the side thereof opposite the wear edge, forming thereby an air gap such that magnetic flux is concentrated in the plates with the magnetic circuit being completed through the air gap between the plate extensions. A magnetic flux monitoring device may be disposed in the air gap of the sensing element for measuring the magnetic flux density in the gap. As the magnet and the plates of the sensing element are worn away by the same mechanism that causes wear on the part being monitored, the magnet volume decreases, thereby decreasing the flux density in the air gap. This decrease in flux density can be related to the wear of the surface under investigation. | 09-22-2011 |
20110267046 | METHOD AND DEVICE FOR COMPENSATION IN A MEASUREMENT OF A MAGNETIC FIELD, OBJECT-LOCALIZING METHOD AND SYSTEM, RECORDING MEDIUM FOR THESE METHODS - This method of compensation in the measurement of a magnetic field comprises:
| 11-03-2011 |
20120086442 | Magnetic Field Sensor and Method Used in a Magnetic Field Sensor that Adjusts a Sensitivity and/or an Offset Over Temperature - A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and/or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and/or offset correction coefficients can be used to generate analog control signals to control a sensitivity and/or an offset of an analog signal path through the magnetic field sensor. | 04-12-2012 |
20120313633 | PERFORMANCE-OPTIMIZED ACTIVATION OF A FLUXGATE SENSOR - A measuring device for measuring a magnetic field having a field coil which is situated around a soft magnetic core and connected to an excitation signal generator, and a detector coil which is situated around the soft magnetic core and connected to an evaluation unit, the excitation signal generator being designed for generating an excitation signal for generating a magnetic field and outputting it to the field coil, and the evaluation unit being designed for evaluating a measuring signal output by the detector coil. The excitation signal generator includes a DC signal generator and an AC signal generator connected in series to the DC signal generator. | 12-13-2012 |
20130015847 | MAGNETIC FIELD SENSOR AND METHOD FOR DETERMINING AND CORRECTING AN OFFSET VOLTAGE OF A MAGNETIC FIELD SENSOR - A magnetic field sensor having a Hall sensor with a first terminal contact and with a second terminal contact and with a third terminal contact and with a fourth terminal contact and with a fifth terminal contact, whereby a first switch with a control input is provided between the first terminal contact and the fifth terminal contact, and the first switch connects or disconnects the first terminal contact to/from the fifth terminal contact, and a control unit is provided and the control unit is connected to the control input of the first switch. | 01-17-2013 |
20130057266 | MAGNETIC BALANCE TYPE CURRENT SENSOR - A magnetic balance type current sensor includes a magnetic balance type current sensor including a magnetoresistance effect element whose characteristic changes owing to an induction magnetic field from a current to be measured flowing through a conductor, a feedback coil configured to be disposed in the vicinity of the magnetoresistance effect element and generate a cancelling magnetic field cancelling out the induction magnetic field, a magnetic shield configured to attenuate the induction magnetic field and enhance the cancelling magnetic field, and a hard bias layer configured to be provided on or above the magnetic shield. | 03-07-2013 |
20130093416 | Magnetic Field Sensor and Method Used in a Magnetic Field Sensor That Adjusts a Sensitivity and/or an Offset Over Temperature - A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and/or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and/or offset correction coefficients can be used to generate analog control signals to control a sensitivity and/or an offset of an analog signal path through the magnetic field sensor. | 04-18-2013 |
20130147470 | INDUCTIVELY INTERROGATED PASSIVE SENSOR APPARATUS - A sensor apparatus comprises a first magnetic transducer which in use is positioned on a first side of a barrier and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side. The second transducer comprises a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier, such as the pressure or temperature on the second side of the barrier. In operation, the first transducer generates a first magnetic field which induces the second transducer to generate a second magnetic field that is dependent upon the magnetic or electrical property of the second transducer. The first transducer detects the second magnetic field and generates a signal which is representative of the sensible condition on the second side of the barrier. | 06-13-2013 |
20130154629 | TOROIDAL FLUXGATE CURRENT TRANSDUCER - Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit ( | 06-20-2013 |
20130162245 | CURRENT SENSOR - A current sensor includes a current path to be measured, a neighboring current path that is provided in the vicinity of the current path to be measured, first and second magnetoelectric transducers having a main sensitivity axis parallel to a direction of a magnetic field generated by a current to be measured flowing in the current path to be measured, and are provided so that the directions of the magnetic fields generated by the current to be measured are applied in mutually opposite directions, and third and fourth magnetoelectric transducers having a main sensitivity axis being non-orthogonal to a direction of a magnetic field generated by the neighboring current while being orthogonal to the direction of the magnetic field generated by the current to be measured, and are provided so that the directions of the magnetic fields generated by the current to be measured are applied in mutually opposite directions. | 06-27-2013 |
20130257422 | MAGNETIC SENSOR AND METHOD FOR MANUFACTURING MAGNETIC SENSOR - A magnetic sensor of the present invention includes a magnetoresistive element having a sensitivity axis in a specified direction, the magnetoresistive element having a laminated structure including a ferromagnetic pinned layer having a pinned magnetization direction, a nonmagnetic intermediate layer, a free magnetic layer having a magnetization direction varying with an external magnetic field, and an antiferromagnetic layer which applies an exchange coupling magnetic field to the free magnetic layer. | 10-03-2013 |
20130300404 | CURRENT SENSOR - A first magnetic sensor and a second magnetic sensor are disposed so that the main sensitivity axis direction of the first magnetic sensor is oriented in the direction of an induction magnetic field from a current flowing through a current line, the main sensitivity axis direction of the second magnetic sensor is oriented in a direction opposite to the direction of an induction magnetic field from the current flowing therethrough, the individual main sensitivity axis directions of the first and second magnetic sensors are oriented in a same direction, and the individual sub-sensitivity axis directions of the first and second magnetic sensors are oriented in the same directions as or directions opposite to the directions of the sub-sensitivity axis components of the induction magnetic fields to which the first and second magnetic sensors are individually subjected from a current flowing through an adjacent current line adjacent to the current line. | 11-14-2013 |
20140132254 | HALL EFFECT MEASUREMENT INSTRUMENT WITH TEMPERATURE COMPENSATION - Disclosed is a Hall Effect instrument with the capability of compensating for temperature drift consistently, accurately and in real time of operation. The instrument embodies a four-point ohm meter circuit measuring Hall Effect sensor resistance and tracking the effect of temperature on the Hall Effect sensor. The instrument takes into account a relationship between the temperature and a temperature compensation index on a per probe basis, which has exhibited a deterministic difference observed by the present inventor. | 05-15-2014 |
20140145714 | HALL ELECTROMOTIVE FORCE SIGNAL DETECTION CIRCUIT AND CURRENT SENSOR THEREOF - The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit ( | 05-29-2014 |
20140184211 | HALL DEVICE, MAGNETIC SENSOR HAVING SAME, AND SIGNAL CORRECTING METHOD THEREOF - By restricting the concentration and the depth of an n-type impurity region which is a magnetosensitive portion of a Hall device to appropriate ranges, it is possible to improve linearity of temperature characteristics in detecting a magnetic field intensity with high accuracy. | 07-03-2014 |
20140210458 | SYSTEMS AND METHODS FOR OFFSET REDUCTION IN SENSOR DEVICES AND SYSTEMS - Embodiments relate to systems and methods for reducing errors in sensor devices and systems. In embodiments, the sensor devices comprise magnetic field sensor devices, such as ordinary or vertical Hall sensor devices, and the error to be reduced is a residual offset error, though in other embodiments other sensor devices can be used and/or other types of errors can be targeted for reduction or elimination. In one embodiment, at least two such sensor devices not electrically coupled with one another are sequentially operated in a spinning current-type mode such that an individual output signal from each of the at least two sensor devices is obtained. A total output signal can then be calculated, such as by averaging or otherwise combining the individual output signals from each sensor device. | 07-31-2014 |
20150008909 | DEVICE FOR COMPENSATING ELECTROMAGNETIC INTERFERENCES DURING BIOMAGNETIC MEASUREMENTS - Invention, relates to the field of supersensitive biomagnetometry under presence of external electromagnetic interferences. In order to perform passive compensation of said interferences, design of device at the magnetometer input is proposed, comprising compensation elements and means for their moving including shifting, holding, and fixation units. In the basic embodiment, three short-closed wire contours are used which are orthogonally placed in space and independently moved up-down relative to the magnetometer or its input antenna. Contours are fixed in positions where minimum of external interference amplitude is achieved according to given field projection. Variants are proposed with cooling of meter and/or contours, location of contours inside the cryostat and their manufacturing from superconductors. | 01-08-2015 |
20150015246 | CALIBRATING READ SENSORS OF ELECTROMAGNETIC READ-WRITE HEADS - Described are embodiments to calibrate read sensors, which in turn may ensure that the equipment utilized to detect antigens is reliable and accurate. If it is determined that a read sensor is degraded a method of calibrating a read sensor of a read head may be used. | 01-15-2015 |
20150048818 | INTEGRATED FLUXGATE MAGNETIC SENSOR AND EXCITATION CIRCUITRY - Improved magnetic sensor excitation circuitry is presented for providing a periodic bidirectional excitation waveform to a fluxgate magnetic sensor excitation coil using a bridge circuit connected to the excitation coil and having lower transistors for switched selective connection to a current mirror input transistor to mirror a current provided by pulsed current source, and with integrated filtering to control pulse rise times and slew rate. | 02-19-2015 |
20150054500 | METHOD AND DEVICE FOR MEASURING A MAGNETIC FIELD AND THE TEMPERATURE OF A MAGNETO-RESISTIVE TRANSDUCER - A method for measuring a first magnetic field and the temperature of a magneto-resistive transducer includes producing, by the magneto-resistive transducer, a measurement signal dependent on the intensity of the first magnetic field and on the temperature of the magneto-resistive transducer. The method includes establishing a measurement of the intensity of the first magnetic field on the basis of the measurement signal produced and a measurement of the temperature of the magneto-resistive transducer. The method also includes generating a second magnetic field to combine with the first magnetic field to form a resultant magnetic field. The method further includes extracting from the measurement signal, the component which is dependent solely on the second magnetic field and establishing the temperature of the magneto-resistive transducer on the basis of the component extracted. | 02-26-2015 |
20150115942 | MAGNETIC SENSOR CIRCUIT - To provide a magnetic sensor circuit that outputs a desired detection pulse while preventing an erroneous detection/erroneous release pulse output when a fluctuation in a power supply voltage occurs within an operating power supply voltage range. A magnetic sensor circuit is configured to include a detection circuit that detects a fluctuation in a power supply voltage or an internal power supply voltage and so as not to latch a determination output of a comparator by a latch circuit that, on the basis of a power supply fluctuation detection signal output from the detection circuit, holds the logic of a control clock signal output from an oscillation circuit for a prescribed period of time and determines the output logic of an output terminal. | 04-30-2015 |
20150130453 | MAGNETIC DETECTION DEVICE - A magnetic field component in a Z direction is guided by a magnetic field guide layer and applied to a magnetic sensor in an X direction that is the same as a sensitivity axis direction thereof, and a detection output is obtained. A bridge circuit is formed with a plurality of magnetic sensors and configured such that an output is not provided for a magnetic field component in the X direction. However, when an external magnetic field in the X direction is drawn to the magnetic field guide layer, variation of sensitivity for the X direction may occur. Thus, soft magnetic characteristics of a first portion of the magnetic field guide layer are deteriorated to decrease the magnetic permeability of the first portion. | 05-14-2015 |
20150293184 | SENSOR DEVICE - A sensor device is provided for suppressing a magnetic stray field, having a semiconductor body with a surface formed in an x-y plane, the x-direction and the y-direction are formed orthogonal to one another, and the sensor device has a first pixel cell and a second pixel cell integrated into the surface of the semiconductor body. A first magnetic field sensor detects a magnetic field in the x-direction and a second magnetic field sensor detects a magnetic field in the y-direction. The two pixel cells in a projection along an imaginary lengthening of the axis are arranged at an edge or next to an extension of the magnet in the x-y plane. | 10-15-2015 |
20150293185 | SENSOR DEVICE - A sensor device for suppressing a magnetic stray field, having a semiconductor body with a surface, formed in an x-y plane, and a back surface. Each circle half of a disk-shaped magnet has two magnetic poles and the magnet is rotatable relative to the IC housing around a z-direction. An imaginary lengthening of the axis penetrates the magnet in the center of gravity of the main extension surface of the magnet. A first pixel cell and a second pixel cell are integrated into the surface of the semiconductor body together with a circuit arrangement, and each pixel cell has a first magnetic field sensor and a second magnetic field sensor. The first pixel cell is spaced apart from the second pixel cell along a connecting line, and the first pixel cell in a projection along an imaginary lengthening of the axis is arranged within the two inner circle segments. | 10-15-2015 |
20150293264 | LIGHTNING-STRIKE ELECTRIC CHARGE ESTIMATION SYSTEM AND METHOD - Magnetic field measurement means measures a magnetic field generated by a lightning strike in a frequency band that includes frequencies of 200 Hz or less. Electric charge calculation means determines the electric current waveform of the lightning strike on the basis of the waveform of the magnetic field measured by the magnetic field measurement means, and integrates the electric current waveform to determine an electric charge. | 10-15-2015 |
20160011278 | SHIELDING APPARATUS, SHIELDING METHOD AND DEMAGNETIZING FOR MEASURING MAGNETIC FIELD | 01-14-2016 |
20160047863 | SYSTEMS AND METHODS FOR OFFSET REDUCTION IN SENSOR DEVICES AND SYSTEMS - Embodiments relate to systems and methods for reducing errors in sensor devices and systems. In embodiments, the sensor devices comprise magnetic field sensor devices, such as ordinary or vertical Hall sensor devices, and the error to be reduced is a residual offset error, though in other embodiments other sensor devices can be used and/or other types of errors can be targeted for reduction or elimination. In one embodiment, at least two such sensor devices not electrically coupled with one another are sequentially operated in a spinning current-type mode such that an individual output signal from each of the at least two sensor devices is obtained. A total output signal can then be calculated, such as by averaging or otherwise combining the individual output signals from each sensor device. | 02-18-2016 |
20160047864 | HALL ELECTROMOTIVE FORCE SIGNAL DETECTION CIRCUIT, CURRENT SENSOR THEREOF, AND HALL ELEMENT DRIVING METHOD - The present embodiment relates to a Hall electromotive force signal detection circuit. The third switch circuit selects a terminal position for applying a driving current out of four terminals of the third Hall element and switches the terminal position among the first terminal, the second terminal, the fourth terminal, and the third terminal in this order. The fourth switch circuit switches a terminal position for applying the driving current to the terminal in turn, among the first to the fourth terminal of the fourth Hall element, such that this terminal position is different from that selected by the third switch circuit and faces the terminal position for injecting the driving current in the third Hall element. A chopper clock generation circuit supplies a chopper clock signal with different four phases to the third switch circuit and to the fourth switch circuit. | 02-18-2016 |
20160061912 | HALL SENSOR EXCITATION SYSTEM - A Hall plate excitation system provides reduced offset and temperature dependence. The Hall plate excitation system includes a current source, a switching network, and a controller. The current source is configured to provide an excitation current to a Hall plate. The switching network is configured to switchably connect the current source to each of a plurality of terminals of the Hall plate. The controller is configured to adjust the excitation current no more than once during each spinning cycle; and to sequentially switch the excitation current to each of the plurality of terminals of the Hall plate during each spinning cycle. | 03-03-2016 |
20160091575 | MAGNETIC SHIELDED PACKAGE - A magnetic shielded package includes a magnetic device, a first magnetic shield member, and a second magnetic shield member. The first magnetic shield member is disposed below the magnetic device. The second magnetic shield member is disposed on the first magnetic shield member so as to cover the magnetic device. An opening portion is formed in the first magnetic shield member (i) at such a position as not to be adjacent to an outer circumference of the first magnetic shield member or (ii) an upper wall of the second magnetic shield member. | 03-31-2016 |
20160109532 | SET/RESET CIRCUIT AND MAGNETIC SENSING DEVICE USING THE SAME - A set/reset circuit used with a magnetoresistive sensor includes a coil, four switch units, a capacitor and a control unit. The four switch units are electrically coupled between a power supply voltage (or a reference voltage) and the coil and have variable resistances. The first end of the capacitor is electrically coupled to the power supply voltage and some of the switch units, and the second end of the capacitor is electrically coupled to the reference voltage. The control unit is electrically coupled to the four switch units and configured to receive a first pulse width modulation signal and a second pulse width modulation signal. A magnetic sensing device utilizing the abovementioned set/reset circuit is also provided. | 04-21-2016 |
20160131722 | SENSOR ARRANGEMENT HAVING THERMO-EMF COMPENSATION - Sensor arrangement providing a signal responsive to a temperature difference between a Hall-effect device output contact and a reference point, having first contact tub located near an external surface of a Hall effect region; second contact tub located near the reference point; first conductor element comprising first and second end portions, the first end portion thermally coupled to the first contact tub and the second end portion thermally coupled to the second contact tub; second conductor element comprising third and fourth end portions, the third end portion thermally coupled to the first contact tub; third conductor element comprising fifth and sixth end portions, the fifth end portion thermally coupled to the second contact tub, wherein the first and third end portions are electrically coupled, the second and fifth end portions are electrically coupled, at least two of first, second, and third conductor elements have substantially different Seebeck coefficients, and the signal is tapped at the fourth and sixth end portions. | 05-12-2016 |
20160139230 | Magnetic Field Sensor Having Calibration Circuitry and Techniques - A magnetic field sensor includes at least one magnetic field sensing element configured to generate a measured magnetic field signal responsive to an external magnetic field and to generate a reference magnetic field signal responsive to a reference magnetic field and a calibration circuit configured to divide the measured magnetic field signal by the reference magnetic field signal to generate a calibrated magnetic field signal. The calibrated signal has reduced susceptibility to stress influences. | 05-19-2016 |
20160161570 | MAGNETIC SENSOR DRIVE CIRCUIT, MAGNETIC SENSOR, CURRENT SENSOR, AND METHOD FOR DRIVING MAGNETIC SENSOR - A magnetic sensor drive circuit that measures a magnetic field by passing a feedback current, which cancels changes in magnetic flux density using measured magnetic field, through a prescribed coil. The drive circuit includes: a first circuit block which controls the feedback current by using an external power source as a power source; a second circuit block which has an output adjustment circuit adjusting a signal according to the strength of the feedback current to be a signal proportional to the voltage of the power source; a first power source line which supplies the external power source to the first circuit block; a second power source line which supplies the external power source to the second circuit block in parallel to the first power source line; a first low pass filter; and a second low pass filter. | 06-09-2016 |