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| Number | Title | Issue Date |
| 7907425 | Circuit and method for predicting a valley timing for a voltage across a switching device Disclosed are circuits and methods for use in a control circuit of a switching mode power supply for turning on a switching device in the switching mode power supply when the voltage across the switching device is at a minimum. A voltage detector is provided for det... | 03/15/2011 |
| 7894214 | Power converter capable of lowering power wastage on standby A power converter includes at least one electric control switch, an electric current detecting and converting unit, a power controller, and a voltage detecting and controlling unit at the primary side; and a synchronous rectifying circuit, two MOSFETs, and an oscill... | 02/22/2011 |
| 7813149 | System and method for power saving conversion topology in switch mode power supplies A power supply includes an input filter and rectifier module, a digital control module, and a converter module. The input filter and rectifier module is configured to rectify an input voltage. The digital control module is adapted to prevent a potential saturation o... | 10/12/2010 |
| 7787263 | Methods and apparatus to control a digital power supply Methods and apparatus to control a digital power supply are disclosed. An example method includes controlling a power factor controller by: receiving a first current signal flowing in a first stage of the power factor controller, receiving a second current signal fl... | 08/31/2010 |
| 7518887 | Apparatus and method for generating high voltage based on digital control A digital high voltage generating apparatus and a method thereof are provided where a switching block controls voltage generated in a second side coil of a power transformer, a digital interface block provides a communication interface, and a digital controlling blo... | 04/14/2009 |
| 7426123 | Finite state machine digital pulse width modulator for a digitally controlled power supply A method is disclosed for generating pulse width modulated pulse control signals for controlling switches in a switching power supply. First, a count value is determined of a master clock within a switching cycle of the power supply from beginning to end thereof. A ... | 09/16/2008 |
| 7400517 | Power factor correction circuit and method therefor In one embodiment, a power factor correction circuit is configured to use a stored value of a feedback signal to assist in regulating the value of an output voltage and to bypass the sample and hold circuit if the output voltage increase to an upper limit or decreas... | 07/15/2008 |
| 7375471 | Charging circuit A charging circuit has a battery 12, switching element 14, and resistor 16 for current detection arranged on the primary side of transformer 10. Diode 18 and capacitor 20 for storing electric power are arranged on the second... | 05/20/2008 |
| 7349229 | Causal sampling circuit for measuring reflected voltage and demagnetizing time of transformer A causal sampling circuit is developed to measure a reflected voltage and demagnetizing time of the transformer. It includes a signal-generation circuit to generate a sample signal for sampling the reflected voltage of the transformer. A ramp signal of the sampling ... | 03/25/2008 |
| 7342392 | Switching regulator with slope compensation independent of changes in switching frequency Compensation for a switching regulator is attained by developing a compensation signal for a switching regulator that is independent of changes in the switching frequency. The regulator operational frequency is established in accordance with a repetitive ramp signal... | 03/11/2008 |
| 7339806 | Adjustment device for adjusting wave shape of output of a DC-AC inverter A DC-AC inverter has an adjustment device for adjusting wave shape of output thereof includes a feedback circuit, and a zero-crossing detector; the feedback circuit will detect and measure output voltage of the inverter, and feedback-control the inverter to make the... | 03/04/2008 |
| 7336057 | DC/DC converter A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in accordance with a second control signal; a current sensor that detects an o... | 02/26/2008 |
| 7315160 | Non linear controlled power supply with a linear soft start operation A system for controlling a soft start for a switching converter includes a digital feedback control system for receiving an analog voltage signal representing the output of a switching converter, for digitally processing the analog voltage signal by comparing it to ... | 01/01/2008 |
| 7301786 | Quasi resonant type switching power supply apparatus with overcurrent limiting A quasi resonant type switching power supplying unit includes an overcurrent limiting circuit and an oscillation level comparison circuit. The overcurrent limiting circuit (i.e., a level determining circuit and a reference voltage generating circuit) receives a reve... | 11/27/2007 |
| 7285989 | Device for detection of power-off A power-off detection device is formed without use of a photo coupler, which is expensive and occupies a relatively large area. The power-off detection device rectifies AC power, provided as external input power from a power supply device, into DC power, detects the... | 10/23/2007 |
| 7262561 | Method for controlling power supply through multiple modulation modes A method for controlling power supply through multiple modulation modes aims to control an inverter of a selective characteristic through a cycle control signal of varying modulation modes to ensure that the inverter and the load on the rear end function in a reliab... | 08/28/2007 |
| 7256632 | Pulse width modulation (PWM) controlling module and method for adjusting a PWM signal thereof A pulse width modulation (PWM) controlling module, includes: a PWM controller, a load detector, and an adjusting module. The PWM controller generates a PWM signal that is utilized for controlling a supply voltage applied to an electronic system. The load detector, c... | 08/14/2007 |
| 7247955 | PWM power supplies using controlled feedback timing and methods of operating same A closed loop power converter circuit of a UPS or other power supply includes a pulse width modulator circuit in a forward path of the closed loop power circuit. A compensation circuit provides pulse width commands to the pulse width modulator at a first rate. A fee... | 07/24/2007 |
| 7248486 | Energy efficient switching converter A switching converter in which an input voltage can be switched by means of at least one controlled switch to at least one primary winding of a transformer, with a control circuit for controlling the switch, to which control circuit a regulating signal in the sense ... | 07/24/2007 |
| 7242596 | Control method for switching power supply circuit A control method for controlling a switching power supply circuit has a control circuit including a setting device that limits the exciting current of a transformer at the time of changeover from a switching delay to a switching period. The setting value set by the ... | 07/10/2007 |
| 7236376 | Controller for regulating output current at the primary side of a power supply A controller controlling the output current at the primary side of a power supply is provided. A waveform detector generates a current-waveform signal. A second control circuit generates an oscillation signal for determining the switching frequency of a switching si... | 06/26/2007 |
| 7218892 | Passive repeater/terminator A passive terminator between a plurality of nodes includes a first voltage divider configured to passively set a differential voltage level between a first voltage level and a second voltage level. The first voltage divider has a Thevenin resistance and is electrica... | 05/15/2007 |
| 7199552 | Control circuit apparatus and power supply circuit control method A microcomputer outputs a command to a control IC to operate first and second loads. The control IC sets first and second DC/DC converters' on-state to operate the first and second loads. The first DC/DC converter converts a voltage of power supplied from a power su... | 04/03/2007 |
| 7200013 | Power supply device and single photo-coupler control circuit thereof A power supply device and a single photo-coupler control circuit thereof are provided. The power supply device includes a single photo-coupler control circuit, a main converter and an auxiliary converter. The main converter connects to an output load. The auxiliary ... | 04/03/2007 |
| 7190210 | Switched-capacitor power supply system and method A plurality of thin-film capacitors are grouped in phases. A control circuit switches each phase between charging and discharging states devised to supply one or more loads with controlled power. ... | 03/13/2007 |
| 7187371 | Display apparatus A display apparatus having a high voltage FBT driving circuit includes a transformer having a primary and a secondary coil, a high voltage detector to detect an output voltage of the secondary coil, a high voltage compensator to output a high voltage compensating si... | 03/06/2007 |
| 7183692 | Method for controlling power supply in a buffered modulation mode A method for controlling power supply in a buffered modulation mode is to control an inverter to perform energy transformation so that the inverter and a load in the rear end can function in a reliable characteristic range and prevent the load from aging too quickly... | 02/27/2007 |
| 7167043 | Decoupling circuit for co-packaged semiconductor devices A model for noise coupling in copackaged semiconductor devices due to coupling through parasitic impedances, and a method and decoupling circuit to minimize the effects of such noise. In one example, which is not intended to be limiting either as to the application ... | 01/23/2007 |
| 7164255 | Inductive battery charger system with primary transformer windings formed in a multi-layer structure There is provided a planar inductive battery charging system designed to enable electronic devices to be recharged. The system includes a planar charging module having a charging surface on which a device to be recharged is placed. Within the charging module and par... | 01/16/2007 |
| 7141956 | Digital output voltage regulation circuit having first control loop for high speed and second control loop for high accuracy A switched mode voltage regulator has a digital control system that includes dual digital control loops. The voltage regulator comprises at least one power switch adapted to convey power between respective input and output terminals of the voltage regulator and a di... | 11/28/2006 |
| 7136451 | Method of and system for stabilizing high voltage power supply voltages in multi-energy computed tomography A method of and a system for stabilizing High Voltage Power Supply (HVPS) DC and AC voltages in multi-energy X-ray computed tomography scanners are provided. The method comprises generating filter ratios, computing DC and AC voltages, and feeding back the computed D... | 11/14/2006 |
| 7129872 | Audio signal analog-to-digital converter utilizing a transformed-based input circuit An apparatus for converting an input analog audio signal into digital form including an analog-to-digital converter. An amplifier circuit and step-down transformer provide an interface for the input analog audio signal to the analog-to-digital converter. The step-do... | 10/31/2006 |
| 7130201 | Power supply device for outputting stable programmable power supply The present invention discloses a power supply device for outputting a stable programmable power supply, which comprises a transformer disposed at a DC output end of the power supply device, and a clamp circuit connected to a secondary current of the transformer. Si... | 10/31/2006 |
| 7116160 | Booster A booster includes a boosting circuit and a feedback control circuit. The boosting circuit is used to boost an input voltage into a predetermined output voltage; the feedback control circuit detects the output voltage of the boosting circuit and stops boosting the v... | 10/03/2006 |
| 7108528 | Power supply connector A power supply connector including a spring loaded member that allows a connector to engage various power receptacles. This engagement of the connector and the power receptacle may reduce a contact resistance between the two components and heat dissipation associate... | 09/19/2006 |
| 7102253 | MOSFET based, high voltage, electronic relays for AC power switching and inductive loads A MOSFET based, high voltage, high current AC electronic relay operating with normally closed contacts is disclosed. The relay includes at least one MOSFET switching circuit selectively switching between switch conducting and switch isolation. The at least one MOSFE... | 09/05/2006 |
| 7082041 | Power supply filtering A power supply is filtered while the amount of in-rush current required by the capacitive charging of the filter is limited. A resistor may be placed in parallel with a relay where the parallel combination is in series with the filtering capacitor. The relay is open... | 07/25/2006 |
| 7072189 | Power supply A power supply is provided, by which power consumption of an electrical apparatus having a normal mode and a standby mode is reduced by including a dedicated power converter for the standby mode, to increase operational efficiency by means of feeding back an output ... | 07/04/2006 |
| 7071742 | Power supply restart delay prevention circuit The auto-restart characteristic of a controller is prevented. A circuit comprises a voltage control loop, a control winding, an optical isolator component, and a diode biasing network. In the case of a power outage, the current from the voltage control loop begins t... | 07/04/2006 |
| 7057907 | Power converter having improved control A power converter using a microcontroller is disclosed herein. In one embodiment, the power converter can be a digital flyback or forward converter. The microcontroller may have a digital pulse-width-modulation (PWM) controller, arithmetic logic unit (ALU) core, int... | 06/06/2006 |
