Patent application number | Description | Published |
20130218053 | SYSTEM COMPRISED OF SENSORS, COMMUNICATIONS, PROCESSING AND INFERENCE ON SERVERS AND OTHER DEVICES - A system for monitoring patient activity comprising: at least one measurement device configured to provide data related to a patient's physical activity; and a server configured to make an inference regarding the patient's physical activity based on data provided by the at least one measurement device. In some embodiments, the inference is a determination of a type of physical activity. In some embodiments, the measurement device is configured to be worn by the patient or carried in the patient's pocket. In some embodiments, two or more measurement devices are used. In some embodiments, the server is remotely located from the measurement device. In some embodiments, the server is configured to archive and retrieve the data provided by the measurement device and the inferences. | 08-22-2013 |
20140256512 | EXERCISE PROMOTION, MEASUREMENT, AND MONITORING SYSTEM - An exercise system comprising: an exercise cycle comprising a crank, wherein the crank is configured to be rotated by a user; and a sensing unit coupled to the exercise cycle, wherein the sensing unit is configured to sense information related to at least one crank measurement and to transmit the information related to the at least one crank measurement to a remote device via wireless communication. In some embodiments, the remote device is a mobile device. In some embodiments, the at least one crank measurement comprises a rotational speed of the crank or a force applied to the crank. The remote device can display information related to use of the exercise cycle based on the information received from the exercise cycle. | 09-11-2014 |
Patent application number | Description | Published |
20120244916 | Multimode Operation DC-DC Converter - Embodiments for at methods, apparatus and systems for operating a voltage regulator are disclosed. One method includes generating, by a switching controller, a switching voltage through controlled closing and opening of a series switch element and a shunt switch element. Further, the method includes generating, by a switchable output filter, a regulated output voltage by filtering the switching voltage, wherein the switchable output filter comprises a plurality of capacitors that are selectively included within the switchable output filter. | 09-27-2012 |
20130249505 | DC-DC CONVERTER ENABLING RAPID OUTPUT VOLTAGE CHANGES - Embodiments for methods, apparatus and systems for operating a voltage regulator are disclosed. One embodiment of the voltage regulator generates a switching voltage through controlled closing and opening of a series switch element and a shunt switch element. The voltage regulator further includes a switched output filter that includes a plurality of capacitors for filtering the switching voltage and generating an output voltage. A mode controller is operative to disconnect at least one of the plurality of capacitors upon receiving a first indicator, where disconnecting causes the at least one of the plurality of capacitors to electrically float, wherein while the at least one capacitor is disconnected the output voltage is changed from a first value to a second value, return the output voltage to a first value or a third value upon receiving a second indicator, and reconnect the at least one of the plurality of capacitors. | 09-26-2013 |
20130267187 | Multimode Operation DC-DC Converter - Embodiments for at methods, apparatus and systems for operating a voltage regulator are disclosed. One apparatus includes a switching voltage regulator, wherein the switching voltage regulator includes a series switch element, a shunt switch element, a switching controller and a switched output filter. The switching controller is configured to generate a switching voltage through controlled closing and opening of the series switch element and the shunt switch element. The switched output filter filters the switching voltage and generates a regulated output voltage, wherein the switched output filter includes a plurality of capacitors that are selectively included within the switched output filter. | 10-10-2013 |
Patent application number | Description | Published |
20110101937 | Voltage Regulator with Virtual Remote Sensing - An automatic voltage compensation circuit in a voltage regulator compensates the output voltage for a voltage drop along lines leading to a remote load. A load capacitor is connected across the load for providing a low impedance across the load during a test phase of the regulator. In one embodiment, during the test phase, the load current is changed up or down a small percentage (e.g., 10%). As a result, the regulator voltage changes due only to the line resistance since the load is bypassed by the load capacitor. The voltage drop at full load current is then derived by detecting the change in regulator output voltage (a fractional voltage drop) and multiplying it. The normal mode is resumed, and the derived voltage drop is added to the regulator output by either compensating the feedback loop or by adding the voltage drop to the output of the regulator. | 05-05-2011 |
20140312865 | VOLTAGE GENERATOR WITH CURRENT SOURCE COMPENSATED FOR AN ERROR CURRENT OPERABLE OVER A WIDE VOLTAGE RANGE - In one embodiment, a regulator circuit for generating a regulated output voltage Vout has an error amplifier using a pair of bipolar transistors at its front end. The error amplifier compares the regulated output voltage to a reference voltage Vref. A precision current source draws a first current through a user-selected set resistance to generate the desired Vref. The regulator circuit controls a power stage to cause Vout to be equal to Vref. The base current into one of the bipolar transistors normally distorts the current through the set resistance. A base current compensation circuit is coupled to the current source to adjust the first current by a value equal to the base current to offset the base current. Therefore, Vref is not affected by the base current. The error amplifier may be in a linear regulator or a switching regulator. The compensation circuit may be used in other applications. | 10-23-2014 |
20140312866 | LINEAR REGULATOR IC WITH VERSATILE GROUND PIN - A linear regulator integrated circuit may be formed having four external terminals including a voltage input (Vin) terminal, a voltage output (Vout) terminal, a Set terminal, and an operational amplifier (op amp) power terminal. A user connects an external resistor to the Set terminal for creating a reference voltage. An op amp controls a pass (or series transistor) to cause an output voltage at the Vout terminal to equal the reference voltage. The op amp has a first power supply terminal internally coupled to the Vin terminal and a second power supply terminal coupled to the op amp power terminal. The op amp power terminal allows a user to externally couple the op amp second power supply terminal to either the Vout pin (for high voltage applications), system ground (for medium voltage applications), or another voltage (to provide additional headroom in very low voltage applications). | 10-23-2014 |
Patent application number | Description | Published |
20080238400 | Bandgap voltage and current reference - Circuits and methods that improve the performance of reference circuits are provided. A reference generator circuit maintains a substantially constant output current over an extended temperature for use as a reference. Output current fluctuations caused by a poorly specified power source or process variations are minimized or eliminated. | 10-02-2008 |
20080272844 | CLASS AB FOLDED-CASCODE AMPLIFIER HAVING CASCODE COMPENSATION - A class AB folded-cascode amplifier having improved gain-bandwidth product, comprises a differential input circuit including a differential transistor pair coupled to a source of tail current and responsive to a differential input signal for conducting a first current, a cascode circuit coupled to the differential input circuit for supplying a second current thereto, and a class AB output stage. A compensation circuit is configured for feeding back mutually complementary compensation signals from an output node to the differential input circuit. Another compensation circuit is configured for feeding back a signal from the output of the output stage to the input of the output stage. | 11-06-2008 |
20090015070 | Paralleling voltage regulators - Circuits and methods for paralleling voltage regulators are provided. Improved current sharing and regulation characteristics are obtained by coupling control terminals of the voltage regulators together which results in precise output voltages and proportional current production. Distributing current generation among multiple paralleled voltage regulators improves heat dissipation and thereby reduces the likelihood that the current produced by the voltage regulators will be temperature limited. | 01-15-2009 |
20090121770 | METHOD FOR CLAMPING A SEMICONDUCTOR REGION AT OR NEAR GROUND - A clamping circuit clamps a voltage received by an n-type semiconductor region without using a Schottky transistor. The clamping circuit includes a current mirror as well as first and second bipolar transistors. The current mirror receives a first current and supplies a second current in response. The first current is received by the first bipolar transistor, and the second current is received by the second bipolar transistor. The difference between the base-emitter junction voltages of the first and second bipolar transistors, in part, defines the voltage at which the n-type region is clamped. To start-up the circuit properly, current is withdrawn from the base/gate terminals of the transistors disposed in the current mirror. The circuit optionally includes a pair of cross-coupled transistors to reduce the output impedance and improve the power supply rejection ratio. | 05-14-2009 |
20100001708 | Paralleling Voltage Regulators - Circuits and methods for paralleling voltage regulators are provided. Improved current sharing and regulation characteristics are obtained by coupling control terminals of the voltage regulators together which results in precise output voltages and proportional current production. Distributing current generation among multiple paralleled voltage regulators improves heat dissipation and thereby reduces the likelihood that the current produced by the voltage regulators will be temperature limited. | 01-07-2010 |
20120007649 | METHOD FOR CLAMPING A SEMICONDUCTOR REGION AT OR NEAR GROUND - A clamping circuit clamps a voltage received by an n-type semiconductor region without using a Schottky transistor. The clamping circuit includes a current mirror as well as first and second bipolar transistors. The current mirror receives a first current and supplies a second current in response. The first current is received by the first bipolar transistor, and the second current is received by the second bipolar transistor. The difference between the base-emitter junction voltages of the first and second bipolar transistors, in part, defines the voltage at which the n-type region is clamped. To start-up the circuit properly, current is withdrawn from the base/gate terminals of the transistors disposed in the current mirror. The circuit optionally includes a pair of cross-coupled transistors to reduce the output impedance and improve the power supply rejection ratio. | 01-12-2012 |