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"That the automobile has practically reached the limit of its development is suggested by the fact that during the past year no improvements of a radical nature have been introduced."
Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8159205 | Inductor current measurement for DC to DC converters A system includes an averaging module, a high pass filter module, a first estimation module, a sensing module, and a combining module. The averaging module receives an output voltage of a power supply and that generates an average output voltage. The high pass filte... | 04/17/2012 |
| 8154268 | Switching regulator with balanced control configuration with filtering and referencing to eliminate compensation A controller for a switching regulator is disclosed including a sense circuit, an error amplifier circuit, a filter and reference circuit, and a comparator circuit. The switching regulator includes a pulse switch circuit coupled to an output inductor for developing ... | 04/10/2012 |
| 8138739 | Circuits and methods for improving transient response of hysteretic DC-DC converters A hysteretic DC-DC converter includes an observer circuit configured to generate an observer control signal for injection into the control loop of the converter. The observer circuit may be configured to differentiate the output voltage of the converter to generate ... | 03/20/2012 |
| 8049482 | Multi-threshold multi-gain active transient response circuit and method for digital multiphase pulse width modulated regulators Disclosed is a multi-phase pulse width modulated voltage regulator and method in which transient voltage excursions or deviations that exceed the load line voltage by more than a pre-determined amount are detected by an ATR circuit and a correction signal is applied... | 11/01/2011 |
| 7719251 | Enhancement of power conversion efficiency using dynamic load detecting and tracking A switching mode power converter may include a modulation circuit to dynamically control a variable switching frequency of the power converter based on an error voltage of the power converter. The power converter may also include a control circuit connected to the m... | 05/18/2010 |
| 7705580 | System for smoothing output voltage of power generator In a system, an output voltage of a power generator is input to a filter circuit. The filter circuit includes a first capacitor having opposing first and second electrodes, a second capacitor having opposing third and fourth electrodes, a first switch electrically c... | 04/27/2010 |
| 7443144 | Voltage regulation system comprising operating condition detection means The invention relates to a system for generating an output voltage (Vout) from an input voltage (Vup), said system comprising:—regulation means (T1) for regulating said output voltage (Vout) to a target voltage level (Vcons), said regulation means (T1 | 10/28/2008 |
| 7439721 | Constant-on-time power-supply controller and related system and method A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The sense voltage is generated by a sense circuit that sources a current t... | 10/21/2008 |
| 7417414 | Semiconductor device provided with feedback circuit including resistive element and capacitive element The present invention provides a switching power supply circuit capable of stabilizing an output voltage as well as increasing a response speed of the output voltage by improving a phase margin of an open loop as a whole of the switching power supply circuit. The sw... | 08/26/2008 |
| 7400126 | DC regulated power supply having voltage correction In a DC regulated power supply realized as AC adapter or the like by a switching power supply, a reference voltage correction circuit, which estimates a voltage drop corresponding to a load current, corrects to increase an output voltage by changing a feedback refer... | 07/15/2008 |
| 7375441 | Systems and methods for dynamically affecting power dissipation in a disk drive including a fixed output voltage regulator A disk drive system includes a fixed output voltage regulator including an output terminal that provides a substantially fixed output voltage. A plurality of loads, each includes a voltage supply terminal. A programmable resistor bank which is adapted to selectively... | 05/20/2008 |
| 7372382 | Voltage regulation using digital voltage control For one disclosed embodiment, error is sensed in a voltage at an output node. One or more analog signals are generated based on the sensed error. One or more generated analog signals are converted into one or more digital signals. The voltage at the output node is c... | 05/13/2008 |
| 7362083 | DC-DC converter with modulator circuit having a feed forward structure A DC-DC converter with an inductor connected in series with a power transistor between first and second terminals of a DC supply source, and with a modulator circuit that has a control output connected to a control gate of the power transistor. The modulator circuit... | 04/22/2008 |
| 7359219 | Power supply A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter are each connected to the primary control unit. ... | 04/15/2008 |
| 7330668 | Low noise light receiver The low noise light receiver comprises a light sensor for generating a sensor signal, the sensor signal comprising a wanted signal resulting from a light source and an interfering signal resulting from interfering light; an optical filter apparatus for reducing the ... | 02/12/2008 |
| 7323850 | Current detection circuit and switching power supply using the same A current detection circuit of the present invention has a switching device 1; an auxiliary switching device 2; an offset voltage source comprising an offset resistor device 7 and a current source circuit 8; a compensation circuit, compri... | 01/29/2008 |
| 7323828 | LED current bias control using a step down regulator A step down switching regulator circuit that is particularly well-suited to drive high power LEDs includes a crossover conduction mode (XCM) control circuit that maintains operation at the crossover point between continuous conduction mode (CCM) and discontinuous co... | 01/29/2008 |
| 7319308 | DC/DC converter A DC/DC converter includes a first switchcoupled to an input voltage and to a reference voltage. The first switch is suitable for driving a load connected to the output terminal of the DC/DC converter. The DC/DC converter includes an inductor having an intrinsic res... | 01/15/2008 |
| 7312597 | Actuation circuit for a switch in a switch-mode converter for improving the response to sudden changes An actuation circuit is provided for a switch controlling the power consumption in a switch-mode converter which has input terminals for applying an input voltage and output terminals for providing an output voltage. The actuation circuit comprises a first input for... | 12/25/2007 |
| 7309977 | System and method for an adaptive synchronous switch in switching regulators Techniques for an adaptive synchronous switch in switching regulators are described, one aspect of which is to achieve a more optimal on/off timing of a synchronous switch that is controlled by the comparator in a feedback control loop and thereby improves power con... | 12/18/2007 |
| 7304465 | Power supply circuit capable of efficiently supplying a supply voltage A power supply circuit generates a supply voltage based on an input constant voltage and supplies the supply voltage to a load. A delay circuit delays the input constant voltage. An output circuit generates the supply voltage from the input constant voltage delayed ... | 12/04/2007 |
| 7276954 | Driver for switching device A driver for a switching device has a plurality of driver circuits for driving the switching device and a control circuit. The control circuit selectively operates the driver circuits in response to a plurality of predetermined drive modes. Alternatively, a driver f... | 10/02/2007 |
| 7274177 | Overshoot suppression circuit for a voltage regulation module An overshoot suppression circuit comprises a switch for coupling to an output of a voltage regulation module and a voltage detector for detecting an output voltage at the output. When the load to the voltage regulation module changes from heavy to light to result in... | 09/25/2007 |
| 7265523 | Control loop for switching power converters A control loop for a clocked switching power converter where the loop features a comparator (44) and a filter (61) in series to linearize the nonlinear response of the comparator (44). The filter (61) has poles and zeros offsetting the po... | 09/04/2007 |
| 7265528 | High-frequency power apparatus A high-frequency power apparatus including: an oscillator, outputting an oscillating signal, an output level of the oscillating signal being variable; an amplifier, amplifying the oscillating signal output from the oscillator and outputting high-frequency power; a D... | 09/04/2007 |
| 7250746 | Current mode switching regulator with predetermined on time A power supply switching regulator including a common terminal; an input terminal for supplying a direct current input; an output terminal; a recirculating diode having a first terminal connected to the common terminal; an inductor having a first terminal connected ... | 07/31/2007 |
| 7245113 | High light load efficiency synchronous buck regulator with pulse skipping control A voltage regulator includes a voltage source for providing an input voltage and circuitry for regulating the input voltage to provide an output voltage. The circuitry for regulating the input voltage includes at least a high side switch and a low side switch. A ski... | 07/17/2007 |
| 7235957 | Power supply with current-sharing control and current-sharing method thereof The present invention provides a power-supply apparatus with a current-sharing circuit and a current-sharing method thereof. The power supply with a current-sharing function uses a bus terminal as a current-sharing control interface. A power circuit provides an outp... | 06/26/2007 |
| 7233130 | Active ripple reduction switched mode power supplies A system and method are provided for actively reducing ripple in a supply voltage provided by a switched mode power supply. In general, active ripple reduction circuitry operates to sense the ripple in the supply voltage to provide a signal indicative of the ripple.... | 06/19/2007 |
| 7233469 | Components having actively controlled circuit elements Protection and filtering functions are provided for external circuits by internal circuits that use controlled elements. ... | 06/19/2007 |
| 7230406 | Fixed-frequency current mode converter and control method thereof A fixed-frequency current mode converter comprises a power stage to produce an inductor current and an output voltage, an error amplifier to generate an error signal from the difference between the output voltage and a reference voltage varied with the inductor curr... | 06/12/2007 |
| 7222290 | Method and apparatus for receiver detection on a PCI-Express bus A method and apparatus are provided for detecting a receiver over a PCI-Express bus. A receiver is detected on a PCI-Express link by adjusting a common mode voltage using a current injected into one or more transmitter output nodes and detecting whether a receiver i... | 05/22/2007 |
| 7180274 | Switching voltage regulator operating without a discontinuous mode A switching circuit operates with a first operating state and a second operating state. During the first operating state, the switching circuit allows a switching current to linearly increase. During the second operating state, the switching circuit allows the switc... | 02/20/2007 |
| 7177166 | Pulse width modulation frequency dithering in a switch mode power supply A switch mode power supply has pulse width modulation (PWM) frequency dithering of a PWM clock frequency. The PWM frequency dithering circuit may change the frequency of the PWM clock based upon each of a plurality of frequencies. A PWM time base circuit may compris... | 02/13/2007 |
| 7177783 | Shape based noise characterization and analysis of LSI The invention allows the inclusion of cross-talk coupling and other noise in circuit simulation by considering a resultant glitch in more detail than just its peak value. A set of parameters represents the noise, with an exemplary embodiment using a triangle approxi... | 02/13/2007 |
| 7170267 | Switching regulator with average current mode control A system and method control an output voltage across a load using current mode control to control current through an output filter connected to the load. The output voltage across the load is compared with a reference voltage to generate a reference current signal i... | 01/30/2007 |
| 7170273 | Power-supply device and hard disk drive using same The object of the invention is to compensate an effect of a voltage drop emerging in output voltage by the equivalent series resistance of a power output filter in a power-supply device. To achieve the object, a power-supply device wherein the power output filter th... | 01/30/2007 |
| 7164258 | Circuits and methods for providing multiple phase switching regulators which employ the input capacitor voltage signal for current sensing Circuits and methods to correct the load sharing in multiphase switching regulators are provided. Using these systems and methods, the input capacitor voltage signal can be sampled and used for current sensing of the regulator's stages. Differences in the amount of ... | 01/16/2007 |
| 7161333 | System and method for determining load current in switching regulators operable in pulse skipping mode Novel circuitry and methodology for determining a load current in a switching regulator circuit operable in a pulse skipping mode of operation and having main and synchronous switches. The load current is determined based on a ratio of time when the synchronous swit... | 01/09/2007 |
| 7135843 | Switching power supply device The circuit provides a type of switching power supply device that can reduce the ripple voltage generated in the output when switching is performed in the step-down/step-up control mode. Control part (CTRL) operates as follows: corresponding to the detection value o... | 11/14/2006 |
