Patent application number | Description | Published |
20080272833 | Charge Pump - A charge pump for generating an input voltage for an operational amplifier includes a storage capacitor for storing a charge pump voltage and a flying capacitor configured to be charged during a first phase of operation and discharged during a second phase of operation. Discharging the flying capacitor charges the storage capacitor. A current source supplies the flying capacitor and a switching means switches current from the current source through the flying capacitor in a first direction during the first phase and in a second opposite direction during the second phase. | 11-06-2008 |
20080290945 | CLASS AB OUTPUT STAGE AND METHOD FOR PROVIDING WIDE SUPPLY VOLTAGE RANGE - A class AB output stage includes first (M | 11-27-2008 |
20090096433 | LDO With Large Dynamic Range of Load Current and Low Power Consumption - An electronic device has an LDO regulator for varying loads. The LDO regulator includes a primary supply node coupled to a primary voltage supply. An output node provides a secondary supply voltage and a load current. A bias current source generates a bias current. A gain stage coupled to the bias current source increases the maximum available load current. The gain stage includes a first MOS transistor biased in weak inversion coupled to a current mirror which mirrors the drain current through the first MOS transistor to the output node. The gate-source voltage of the first MOS transistor increases in response to a decreasing secondary supply voltage level at the output node to increase the available load current. | 04-16-2009 |
20090189681 | SELF-OSCILLATING REGULATED LOW-RIPPLE CHARGE PUMP AND METHOD - Charge pump circuitry ( | 07-30-2009 |
20090322429 | Variable gain current input amplifier and method - Variable gain circuitry includes a first input transistor (M | 12-31-2009 |
20100019844 | HIGH EFFICIENCY PRECISION AMPLIFIER - A high efficiency precision amplifier which comprises a linear amplifier stage, a class D amplifier stage and a set of switches is provided. Both amplifier stages receive the same input signal. The load is driven by the output of the linear amplifier stage. The set of switches connect the output of the class D amplifier stage to either of the positive and negative supply terminals of the linear amplifier stage and the other of the positive and negative supply terminals of the linear amplifier stage to a negative or positive supply, depending on the polarity of the signal being amplified. | 01-28-2010 |
20100045380 | LOW DROP VOLTAGE REGULATOR WITH INSTANT LOAD REGULATION AND METHOD - An LDO regulator ( | 02-25-2010 |
20110050250 | ELECTRONIC DEVICE AND METHOD FOR INDUCTOR CURRENT MEASUREMENT - An electronic device includes a circuit for measuring a current in an inductor, wherein the current in the inductor is controlled by alternately switching a first power transistor and a second power transistor each having a first electrode, a second electrode and a control gate. The measuring circuit includes a first sense transistor having a first electrode, a second electrode and a control gate, the first sense transistor having the control gate coupled to the control gate of the first power transistor. A second electrode is coupled to the second electrode of the first power transistor. A second sense transistor has a first electrode, a second electrode and a control gate, the second sense transistor having the control gate coupled to the control gate of the second power transistor and having the second electrode coupled to the second electrode of the second power transistor. An amplifier is operable in a first configuration for providing an output current that is a function of a first current though the first sense transistor during a first period of time or in a second configuration for providing the output current as a function of a second current through the second sense transistor during a second period of time, so as to alternately sense a current through the first power transistor with the first sense transistor and through the second power transistor with the second sense transistor. | 03-03-2011 |
20110134665 | Low-voltage start up circuit and method for DC-DC boost converter - A start up circuit ( | 06-09-2011 |
20110134674 | Active rectifier and method for energy harvesting power management circuit - An active rectifier ( | 06-09-2011 |
20110181115 | Power management DC-DC converter and method for induction energy harvester - A system for managing AC energy harvested from a harvesting device ( | 07-28-2011 |
20110181258 | Low-power feedback and method for DC-DC converters and voltage regulators for energy harvesters - A converter ( | 07-28-2011 |
20110199057 | Battery protection circuit and method for energy harvester circuit - Power management circuitry ( | 08-18-2011 |
20110221416 | Battery charger and method for collecting maximum power from energy harvester circuit - An energy harvesting system for transferring energy from an energy harvester ( | 09-15-2011 |
20110227543 | Converter and method for extracting maximum power from piezo vibration harvester | 09-22-2011 |
20120206210 | CIRCUITRY AND METHOD FOR PRECISION AMPLITUDE CONTROL IN QUARTZ AND MEMS OSCILLATORS - An oscillator includes oscillator circuitry ( | 08-16-2012 |
20120319736 | Comparator and method with adjustable speed and power consumption - A comparator ( | 12-20-2012 |
20130063110 | FAST STARTUP ALGORITHM FOR LOW NOISE POWER MANAGEMENT - A method is provided. A low dropout regulator (LDO) is disabled during a first mode, and a first reference voltage is selected and applied to a switched-mode converter during the first mode. Also during the first mode, a first output voltage is generated by the switched-mode converter from a power supply, and a first capacitor is overcharged with the first output voltage. The LDO is then enabled during a second mode. During a first portion of a startup period for the second mode, a second capacitor is charged from the first capacitor, and a second reference voltage is selected and applied to the switched-mode converter. Then, during a second portion of the startup period for the second mode, the second capacitor is charged with the switched-mode converter. | 03-14-2013 |
20130063111 | POWER MANAGEMENT SYSTEM AND METHOD WITH ADAPTIVE NOISE CONTROL - A method is provided. A first reference voltage during an idle mode is selected, and the first reference voltage is applied to a switched-mode converter. A first output voltage is then generated by the switched-mode converter from a power supply, and a capacitor is overcharged with the first output voltage. The first output voltage is regulated to generate a second output voltage during the idle mode. Then, a second reference voltage during a quiet mode, where the second reference voltage to the buck converter. During the quiet mode, a third output voltage is generated from the switched-mode converter and from discharging the overcharged capacitor, and the third output voltage is regulated to generate the second output voltage. | 03-14-2013 |
20130082671 | Low noise voltage regulator and method with fast settling and low-power consumption - A voltage regulator controls a regulated output voltage (Vout) by feeding it back to a differential input stage ( | 04-04-2013 |
20130082676 | Fast-settling precision voltage follower circuit and method - A voltage follower circuit including an input stage for generating a difference between the input signal and the output signal. An output circuit receiving the first signal and producing the output signal. A slew boost circuit includes a first transistor having a control electrode for receiving the input signal, a first electrode coupled to a first current source, and a second electrode coupled to a first supply voltage, a second transistor having a control electrode coupled to the first electrode of the first transistor, a first electrode coupled to the first signal, and a second electrode coupled to the first supply voltage, and a third transistor having a control electrode coupled to the first electrode of the first transistor, a first electrode coupled to the first signal, and a second electrode coupled to a second supply voltage. | 04-04-2013 |
20130113546 | Master-slave low-noise charge pump circuit and method - Charge pump circuitry ( | 05-09-2013 |
20140191730 | CONVERTER AND METHOD FOR EXTRACTING MAXIMUM POWER FROM PIEZO VIBRATION HARVESTER | 07-10-2014 |
20140218112 | Compensation Circuitry And Method For Amplifiers Driving Large Capacitive Loads - An operational amplifier ( | 08-07-2014 |