Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8148968 | Method and apparatus for a power supply controller responsive to a feedforward signal An apparatus and method of switching a switch of a power supply in response to an input voltage signal are disclosed. According to aspects of the present invention, a power supply controller includes a switch duty cycle controller coupled to receive a feedback signa... | 04/03/2012 |
| 8120348 | Power converter with improved line transient response, control circuit for power converter, and method for improving line transient response The present invention discloses a power converter with improved line transient, comprising: a power stage circuit including at least one power transistor switch which operates to convert an input voltage to an output voltage; an error amplifier comparing a feedback ... | 02/21/2012 |
| 8115469 | Driver circuit A driver circuit raises an output transistor signal smoothly while suppressing decreases in voltage. A motor driver includes a transistor connected to a buffer of a pre-driver. An external terminal of the motor driver is connected to a regulator to supply first and ... | 02/14/2012 |
| 8076920 | Switching power converter and control system A switching power converter tracks a time-varying input voltage during each cycle of the input voltage to provide power factor correction. The switching power converter includes a switch with a frequency and duty cycle modulated control signal. The switch controls t... | 12/13/2011 |
| 8067930 | Input voltage detecting circuit and power supply having such input voltage detecting circuit An input voltage detecting circuit includes an input circuit, a signal processing circuit and an output circuit. The input circuit is used for processing the intensity and the waveform of an input voltage, thereby generating a first signal, wherein the first signal ... | 11/29/2011 |
| 8030912 | Method and apparatus for controlling the maximum output power of a power converter A controller for a power converter is disclosed. An example circuit controller according to aspects of the present invention includes an input voltage sensor to be coupled to receive an input signal representative of an input voltage of the power converter. A curren... | 10/04/2011 |
| 8018218 | Controller of DC-DC converter with input voltage and output voltage sensing from the phase node A PWM controller of a DC-DC converter is provided. The DC-DC converter converts an input voltage into an output voltage and comprises an output inductor coupled between an output of the DC-DC converter and a phase node. A first sense circuit senses a signal from the... | 09/13/2011 |
| 7986136 | Switching mode power supply apparatus and power supply method thereof A switching mode power supply apparatus includes a conversion unit to convert input power into output power having a predetermined voltage by performing a switching operation; a light emitting unit to emit light if the voltage of the output power exceeds a predeterm... | 07/26/2011 |
| 7969135 | Regulation circuit and a method for regulating an input voltage A regulation circuit comprises an error detector, an integrator, and a voltage regulator. The error detector comprises an input for an input voltage, a further input for a reference voltage and an output for an error signal, wherein the error signal depends on the i... | 06/28/2011 |
| 7834608 | Feed-forward compensation for a hysteretic switching regulator One embodiment of the invention includes a hysteretic power regulator system. The system includes a switching stage configured to periodically couple an input voltage to an inductor in response to a control signal to generate an output voltage. The system also inclu... | 11/16/2010 |
| 7768247 | Under voltage lock out circuit and method An under voltage lock out circuit which monitors an input voltage and executes a predetermined sequence when the input voltage satisfies a predetermined condition may include a voltage comparison unit which compares the input voltage and a predetermined threshold vo... | 08/03/2010 |
| 7746050 | Method and apparatus for controlling the maximum output power of a power converter A controller for a power converter is disclosed. An example circuit controller according to aspects of the present invention includes an input voltage sensor to be coupled to receive an input signal representative of an input voltage of the power converter. A curren... | 06/29/2010 |
| 7719252 | Power supply A power supply is provided, which is capable of stabilizing a generated output of the fuel cell using neither a voltage nor a current outputted from the fuel cell as a negative feedback signal. The power supply includes a fuel cell 110, a DC-DC converter 1... | 05/18/2010 |
| 7642765 | Monolithic miniature voltage converter with very low input voltage A DC voltage conversion device including a DC/DC converter and an energy reservoir capable of providing a starting voltage to the DC/DC converter. ... | 01/05/2010 |
| 7598719 | Switching regulator with improved power supply voltage variation response Provided is a switching regulator having an improved power supply voltage variation response characteristic while maintaining the stability of an output voltage to oscillation. An output resistance of an error amplifier is adjusted by a power supply voltage variatio... | 10/06/2009 |
| 7592793 | Voltage regulator providing power from AC power source A high efficiency voltage regulator for generating a regulated output voltage from an AC power source is disclosed. It includes a switch coupled to a voltage source from the AC power source to provide a supply voltage. An input detection circuit is coupled to the vo... | 09/22/2009 |
| 7570039 | Apparatus and method for control supply output voltage techniques to track battery voltage A voltage regulation and battery charging system is provided. The system can simultaneously provide a regulated output voltage and charge a battery. The system includes a battery charger circuit, a voltage regulator circuit, and a voltage tracking circuit. A voltage... | 08/04/2009 |
| 7557556 | Voltage control circuit Provided is a voltage control circuit which suppresses a calorific value that generates when short-circuit fault occurs even if a voltage value of an input voltage is large. At the time of short-circuit fault, an additional control voltage Va whose voltage value bec... | 07/07/2009 |
| 7514913 | Parallel current mode control using a direct duty cycle algorithm with low computational requirements to perform power factor correction A method and apparatus to implement parallel current mode control that is suitable for digital and analog implementation. A duty cycle algorithm is composed of a voltage term and a parallel current term which depends on the inductor current change between the induct... | 04/07/2009 |
| 7492142 | DC chopper and method for operating a DC chopper A DC chopper features a setting device, which sets a required current value signal being dependent on a filtered input voltage such that an oscillation of the input filter device and an oscillation of the current are phase-opposed. The DC chopper may further have a ... | 02/17/2009 |
| 7486064 | Under voltage lock out circuit and method A voltage comparison unit compares a battery voltage with a predetermined threshold voltage, and outputs a comparison signal. A sequence circuit receives the comparison signal and a start-up signal instructing start-up of equipment mounted with a UVLO circuit, and e... | 02/03/2009 |
| 7471073 | Method of finding a maximum power of a photovoltaic generator A method of finding a power maximum of a photovoltaic generator using an MPP regulator of a photovoltaic current converter by means of which a maximum generator power is set at an operating point of the generator's characteristic curve is intended to supply improved... | 12/30/2008 |
| 7453251 | Voltage tracking reference for a power regulator A control circuit for a PWM switching power regulator including an error amplifier and an amplifier filter circuit. The error amplifier has a first input receiving a reference signal, a second input receiving an output sense signal, and an output providing a compens... | 11/18/2008 |
| 7433211 | System and method for input current shaping in a power converter A power converter delivers electrical power from an electrical power source to a load according to a plurality of operation modes, where at least one of the operation modes is a peak current switching mode. Under the peak current switching mode, a switch controller ... | 10/07/2008 |
| 7432691 | Method and apparatus for controlling power drawn from an energy converter Methods, apparatus, media and signals for controlling power drawn from an energy converter to supply a load, where the energy converter is operable to convert energy from a physical source into electrical energy. Power drawn from the energy converter is changed when... | 10/07/2008 |
| 7425819 | Slope compensation circuit A current-mode switching regulator uses a slope compensation circuit that automatically accounts for different inductor values and varying input voltages to generate a slope compensation signal. The slope compensation circuit monitors a voltage across a semiconducto... | 09/16/2008 |
| 7420354 | Method and apparatus for controlling power drawn from an energy converter A computer readable, media and signals for controlling power drawn from an energy converter to supply a load, where the energy converter is operable to convert energy from a physical source into electrical energy. Power drawn from the energy converter is changed whe... | 09/02/2008 |
| 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 |
| 7405551 | Method and an apparatus to adjust duty cycle for voltage supply regulation A method and an apparatus to regulate voltage supply have been disclosed. In one embodiment, the apparatus includes a power converter block to generate an output voltage from an input voltage and a voltage regulator controller coupled to the power converter block to... | 07/29/2008 |
| 7400119 | Modular high voltage power supply for chemical analysis A high voltage power supply for use in a system such as a microfluidics system, uses a DC-DC converter in parallel with a voltage-controlled resistor. A feedback circuit provides a control signal for the DC-DC converter and voltage-controlled resistor so as to regul... | 07/15/2008 |
| 7397678 | Method for driving a switch that controls current drawn in a power factor correction circuit and a drive circuit therefor The invention relates to a method for provision of a drive signal for a switch which controls the current drawn by an inductive energy storage element in a power factor correction circuit, in which a control signal which controls the power consumption is available. ... | 07/08/2008 |
| 7394237 | Maxium power point tracking method and tracking device thereof for a solar power system A maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC/DC converter to perform an active resistance characteristic; a maximum power point tracking... | 07/01/2008 |
| 7388361 | Mainboard and power control device thereof A power control device includes a comparison unit, a control unit and a switch unit. The comparison unit electrically connects to a first power rail and a second power rail, respectively, and generates a comparing signal according to a reference signal, a first volt... | 06/17/2008 |
| 7385376 | Voltage regulator with high voltage protection A method for regulating a voltage in an integrated circuit device includes providing a first regulated output based upon a first voltage input range and subsequently receiving the first regulated output and providing a second regulated output based upon a second vol... | 06/10/2008 |
| 7382150 | Sensitivity switchable detection circuit and method A sensitivity switchable detection circuit includes a high gain circuit for outputting a first signal, a low gain circuit for outputting a second signal, and an output switching circuit for switching between the first signal and the second signal. When the first sig... | 06/03/2008 |
| 7375503 | System for current sensing in switched DC-to-DC converters A system for sensing the supply current of a switched DC-to-DC converter. The system includes a first circuit that senses a first voltage that is proportional to the supply current, wherein the first voltage has first ripple; a second circuit coupled to the first ci... | 05/20/2008 |
| 7368891 | Charge control method of capacitor in thyristor converter Charging time of a capacitor is shortened while avoiding erroneous firing due to distortion of a power supply voltage and sustaining an inrush current at a constant level. In the charge control method of a capacitor in a thyristor converter comprising a thyristor fo... | 05/06/2008 |
| 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 |
| 7358712 | Power supply control circuit and control method thereof A power supply control circuit includes: a conducting part configured to be controllable in its a conducting amount for conducting a power supply current to a load circuit; a current change ratio detecting part detecting a change rate of the power supply curr... | 04/15/2008 |
| 7358627 | Electronic control systems and methods An apparatus in an electronic control system allows two or three wire operation. A power supply can supply power to the enclosed circuitry in both two and three wire installations. Two separate zero cross detectors are used such that timing information can be collec... | 04/15/2008 |
