| Patent application number | Description | Published |
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| 20100259298 | LOW-QUIESCENT-CURRENT BUFFER - An embodiment of an input-buffer circuit may include an input stage with an inverter having an input operable to receive a signal to be translated. The input stage may include a limiting circuit coupled to the input stage for arresting quiescent current. Additional embodiments of an input-buffer circuit formed according to the subject matter disclosed herein may include feedback transistors suited to provide additional current to the input stage and a hysteresis circuit suited to provide hysteresis current to the input stage when an input signal has a high-frequency change rate. | 10-14-2010 |
| 20100327195 | LOW-POWER OPTOCOUPLER - An embodiment of an optocoupler may provide electrical isolation between signals on a driver side and signals on a receiver side of the optocoupler by generating light signals via a fiber-optic link to the receiver. One embodiment includes driver circuit that may receive an input signal (or a series of input signals) having a specific clock cycle. Instead of driving a light source, such as a light-emitting diode, for the entire duration in which an input signal may be at a high logic level, the LED may be driven with only a pulse to indicate any transitions from high-to-low or from low-to-high. In another embodiment, a receiver circuit may then interpret pulses of differing widths to reconstruct a series of logical signal from only its pulse transitions. By limiting the amount of time in which the LED is on, yet still conveying all underlying data in the input signal, the optocoupler reduces the overall power needed during operation. | 12-30-2010 |
| 20110128362 | DUAL-CAMERA FACE RECOGNITION DEVICE AND METHOD - A dual-camera face recognition device and method are disclosed. The device includes: a first camera, for capturing a face image; a second camera, arranged at a different position from the first camera, for capturing a face image; a face recognition processing unit, for receiving and recognizing the face image captured by the first camera and obtaining a first candidate set, and for receiving and recognizing the face image captured by the second camera and obtaining a second candidate set. The face recognition processing unit is also adapted to select from the first candidate set and the second candidate set a candidate object whose similarity complies with a predetermined rule as a recognition result. | 06-02-2011 |
| 20120274369 | POWER-ON-RESET CIRCUIT AND RESET METHOD - Apparatus and methods for a power-on-reset (POR) circuit are provided. In an example, a (POR) circuit can include a self-bias module configured to provide a reference voltage, a feedback module configured to provide a feedback voltage, a comparison module configured to compare the feedback voltage to the reference voltage and to provide an output signal, an inverter configured to couple the output of the comparison module to an enable input of the self-bias module, and a switch module coupled to the inverter, wherein the switch module and the inverter are configured to disabled the self bias module when the feedback voltage exceeds the reference voltage. | 11-01-2012 |
| 20130027089 | CIRCUIT AND METHOD FOR DETECTING MULTIPLE SUPPLY VOLTAGES - An apparatus comprises a supply voltage divider, a state machine, two comparators and a threshold selector. The supply voltage divider divides a V | 01-31-2013 |
| 20130038111 | Automobile neck pillow - An automobile neck pillow relates to an automobile seat articles technology field, which adopts a key technology truly adapted to human mechanical physiological curves and makes a multiple choice about materials of a core body and an elongated housing and a scientific measurement about shapes and sizes thereof to make the core body and the elongated housing match with each other, wherein the core body is soaked in medical liquids of health care to provide health care and healing to the neck, the core body is attached with a bamboo charcoal fiber cushion, an infra-red cloth, or a negative oxygen ion cloth while integrally being sprayed with perfume, and a brace provided in the elongated housing is mounted between a seat and a head cushion by a longitudinal fixation, a transverse fixation, a combination of longitudinal and transverse fixation, a head-sleeving fixation, or an integral fixation with the head cushion. | 02-14-2013 |
| 20130154709 | SYSTEMS AND METHODS FOR OUTPUT CONTROL - The present disclosure provides an output control circuit including a signal feedback circuit and an enable control circuit, wherein the signal feedback circuit is configured to compare an output voltage with a set output voltage threshold and to output a disable signal to an enable control circuit when the output voltage arrives at the set output voltage threshold, and wherein the enable control circuit is configured to stop an operation of a translation circuit, upon reception of the disable signal from the signal feedback circuit. | 06-20-2013 |
| 20130222309 | MOTOR DRIVE CIRCUIT - This document discusses, among other things, apparatus and methods for a motor drive, such as a haptic motor drive. In an example, a motor drive can include a low dropout (LDO) regulator configured to receive a supply voltage and to provide a regulated voltage, a power switch circuit configured to receive the supply voltage and to receive the regulated voltage from the LDO regulator, and a level shift circuit configured to receive power from the power switch circuit, to receive an input signal, and to provide an output signal to a a voltage difference generating circuit based on the input signal and the power from the power switch circuit. In certain states of the motor drive, the power switch circuit can couple either the regulated voltage or the supply voltage to the level shift circuit. | 08-29-2013 |
| 20130234774 | LEVEL SWITCHING CIRCUIT AND METHOD FOR CONTROLLING RAIL-TO-RAIL ENABLING SIGNAL - This document discusses, among other things, methods for controlling a Rail-to-Rail enabling signal, including providing a first signal of an input signal of a control circuit to a level switching circuit, performing, by the level switching circuit, enabling control according to a high level and a low level of the first signal, and outputting, by the level switching circuit, a disabling signal in case of a failure of a power supply coupled to the level switching circuit. The document also discusses a circuit for controlling a Rail-to-Rail enabling signal and a level switching circuit configured to output a disabling signal properly to provide an accurate enabling control signal for equipment operated under control of an enabling control in case of the failure of the power supply. | 09-12-2013 |
| 20130255496 | Ionic Liquid Solvent and Gas Purification Method Using the Same - An ionic liquid solvent and gas purification method using the same are provided. The ionic liquid solvent consists of a main absorbent, a regulator for the main absorbent, an auxiliary absorbent, an activator, an antioxidant and water. The ionic liquid involves a low synthetic cost, low viscosity and high absorption capacity, and can be easily regenerated and recycled. The method, compared with traditional processes, has advantages such as a greater absorption capability and lower operation cost. | 10-03-2013 |
| 20130285730 | CLAMP CIRCUIT AND METHOD FOR CLAMPING VOLTAGE - The disclosure provides a clamp circuit and a method for clamping voltage. The clamp circuit includes: a first switch control unit, connected with the high-potential terminal of the first stage output of a comparator and configured to clamp the voltage of the high-potential terminal to V | 10-31-2013 |
| 20130307517 | LOW-VOLTAGE BAND-GAP VOLTAGE REFERENCE CIRCUIT - The present application discusses low voltage band-gap voltage reference circuit and methods. In an example the circuit can include a current mirror, an operational amplifier adopting an N-Metal-Oxide-Semiconductor (NMOS) input pair structure, a band-gap output circuit, an adaptive adjustment circuit; and two branches of Bipolar Junction Transistor (BJT). The current mirror can be configured to receive an output signal of the operational amplifier and to provide a current to the two branches of BJT. The operational amplifier can be configured to differentially input voltages at the upper ends of the two branches of BJT, to generate the output signal to the current mirror, and to equalize the voltages at the upper ends of the two branches of BJT using a deep negative feedback. | 11-21-2013 |
| 20140002139 | MAXIMUM VOLTAGE SELECTION CIRCUIT AND METHOD AND SUB-SELECTION CIRCUIT | 01-02-2014 |
| 20140021979 | CIRCUIT AND METHOD FOR OVERCURRENT DETECTION OF POWER SWITCH - An overcurrent detection circuit for a power switch comprises a sampling circuit and a comparing circuit. The sampling circuit is configured to perform current sampling on the power switch using a sampling Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) and an amplifier, convert a sample current into a sample voltage and transmit the sample voltage to the comparing circuit, and clamp operating voltages of the comparing circuit and of an output circuit of the amplifier by a serially connected clamping MOSFET. The comparing circuit is configured to compare the sample voltage with a reference voltage and to output a result of overcurrent detection. | 01-23-2014 |
| 20140104003 | OPERATIONAL AMPLIFIER CIRCUIT AND METHOD IMPLEMENTING THE SAME - The disclosure provides an operational amplifier circuit, in which a power supply of an amplifying circuit is coupled to a first voltage clamping circuit, and the first voltage clamping circuit clamps a supply voltage of the amplifying circuit when the supply voltage exceeds a normal-operation allowable voltage of the amplifying circuit. The disclosure also provides a method for implementing the operational amplifier circuit. According to the disclosure, the operational circuit may be avoided from subject to an excessive supply voltage, which may damage devices in the amplifying circuit of the operational amplifier. | 04-17-2014 |
| 20140167830 | DELAY TIME ADJUSTING CIRCUIT, METHOD, AND INTEGRATED CIRCUIT - A delay time adjusting circuit is described, in which a reference signal circuit generates at least one reference signal to an A/D conversion circuit, an input signal circuit generates an input signal to the A/D conversion circuit, the A/D conversion circuit compares the input signal with the at least one reference signal to output a digital signal to a digital logic chip, and the digital logic chip determines a delay time based on the digital signal. In this way, the delay time can be determined digitally, and an adjusting accuracy of the delay time can be increased; and also, the delay time can be adjusted through changing the level of the input signal, thus reducing circuit losses and costs | 06-19-2014 |
| 20140218115 | CURRENT COMPENSATION CIRCUIT, METHOD AND OPERATIONAL AMPLIFIER - Disclosed is a current compensation circuit. During calibration of a compensation current, a digital control circuit delivers a digital signal with values varying over time to a current compensation array, the current compensation array outputs different amounts of compensation current based on the digital signal with values varying over time, the digital control circuit latches a value of the digital signal, which results in a best compensation current, based on influences of the different amounts of compensation current on a parameter to be calibrated, to complete the calibration. Upon and after completion of the calibration, the digital control circuit continuously delivers the digital signal with the latched value to the current compensation array, and the current compensation array outputs the best compensation current based on the digital signal with the latched value. | 08-07-2014 |
| 20140354261 | METHOD, CIRCUIT AND INTEGRATED CIRCUIT FOR DETECTING RESONANCE FREQUENCY - A method, circuit, and integrated circuit for detecting resonance frequency is disclosed in which a first operational amplifier circuit receives an input signal and provides an output signal for a resonance circuit to store energy, a zero crossing comparator circuit samples a discharge current of the resonance circuit and transforms the sampled current into a sampled voltage and outputs a square signal to a digital signal processor based on the sampled voltage, and the digital signal processor obtains a resonance frequency based on the square signal. | 12-04-2014 |
| 20140376141 | OVERCURRENT PROTECTION METHOD, CIRCUIT AND INTEGRATED CIRCUIT - Disclosed is an overcurrent protection method and circuit and an integrated circuit. The overcurrent protection circuit includes an output circuit, an overcurrent sampling circuit and an overcurrent protection loop circuit. The overcurrent sampling circuit is configured to perform overcurrent sampling on the output circuit, and to pass the sampled current to the overcurrent protection loop circuit, and the overcurrent protection loop circuit is configured to perform direct current level shifting on the sampled current to result in a control current, and to provide a negative feedback to the output current of the output circuit based on the control current. | 12-25-2014 |
| 20150035598 | COMMON-MODE FEEDBACK DIFFERENTIAL AMPLIFIER - The present invention discloses a common-mode feedback differential amplifier circuit, a common-mode feedback differential amplification method, and an integrated circuit. In an example, a common-mode feedback (CMFB) loop conducts voltage division on a first common-mode signal to generate a second common-mode signal and a third common-mode signal, a differential amplifier sets a voltage of the signal with the higher voltage between the second common-mode signal and the third common-mode signal equal to a voltage of a first input terminal or a second input terminal, and the CMFB loop controls the differential amplifier to output an output signal with the minimum voltage equal to the voltage of the first common-mode signal. | 02-05-2015 |
| 20150068289 | SYSTEM AND METHOD FOR MONITORING LUBRICANT OF AN ENGINE - The present invention relates to a system and method for monitoring lubricant of an engine. The system for monitoring lubricant of an engine comprises: a lubricant sensor, which measures lubricant quantity of the engine; a data acquisition unit, which collects the lubricant quantity of the engine from the lubricant sensor at a fixed time interval; and a message generation unit, which generates lubricant quantity monitoring messages according to the lubricant quantity of the engine collected by the data acquisition unit. | 03-12-2015 |
| 20150068293 | METHOD AND DEVICE FOR MONITORING THE MALFUNCTION OF APU TURBINE VANE FRACTURE AND ROTOR SHAFT JAM - The present invention relates to a method and device for monitoring APU turbine vane fracture and rotor shaft jam. The method for monitoring APU turbine vane fracture and rotor shaft jam comprises: acquiring APU messages at multiple time points within a period; obtaining the operation parameters of the APU according to the APU messages, the operation parameters including at least the start time STA; calculating the average value AVG and the deviation index δ of the start time STA within the period; and determining the circumstance of the turbine vane fracture and rotation shaft jam of APU is in stable phase, decline phase or malfunction phase according to the deviation index δ. | 03-12-2015 |
| 20150073648 | SYSTEM AND METHOD FOR DETECTING ADDITION OF ENGINE LUBRICANT - The present invention relates to a method for detecting addition of engine lubricant, comprising: determining whether the difference value between the lubricant quantity at a first timing and that at a second timing is greater than a first threshold value; delaying a period and determining whether the difference value between the lubricant quantity at a third timing and that at a fourth timing is greater than a second threshold value in response to that the difference value between the lubricant quantity at the first timing and that at the second timing is greater than the first threshold value; and detecting the lubricant increment in response to that the difference value between the lubricant quantity at the third timing and that at the fourth timing is greater than the second threshold value. | 03-12-2015 |
| 20150084895 | LOAD DRIVING METHOD, LOAD DRIVING CIRCUIT, AND APPLICATION DEVICES THEREOF - The present invention discloses a load driving circuit, comprising a voltage differential generation circuit and a common mode voltage generation circuit; wherein the voltage differential generation circuit is configured to generate a driving voltage for driving a load; and the common mode voltage generation circuit is configured to: when the voltage differential generation circuit generates the driving voltage for driving the load, regulate the voltages output by a first output terminal and a second output terminal of the voltage differential generation circuit to the same voltage value. The present invention also provides a load driving method and application devices thereof. With the technical solutions according to the present invention, a central value of a voltage output by the first output terminal and a voltage output by the second output terminal of the voltage differential generation circuit is effectively regulated. In this way, when a duty cycle of an input signal is within a range of 0 to 100%, the driving voltage generated by the voltage differential generation circuit is in a linear relation with the duty cycle of the input signal, thereby ensuring fidelity of an output signal. | 03-26-2015 |
