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Class Information
Number: 323/234
Name: Electricity: power supply or regulation systems > Output level responsive
Description: Subject matter which maintains an output at a desired level through the use of means which responds to deviation in the output level and produces a change in the output which is opposite to the deviation.


Sub-classes under this class:

Class Number Class Name Patents
323/237 Phase controlled switching using electronic tube or a three or more terminal semiconductive device 95
323/265 Using a three or more terminal semiconductive device as the final control device 70
323/247 Using a transformer or inductor as the final control device 41
323/291 Using an electronic tube as the final control device 4
323/293 Using an impedance as the final control device 36
323/235 Zero switching 179


Patents under this class:
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Patent Number Title Of Patent Date Issued
7613442 Switch circuit and method of switching radio frequency signals Nov. 3, 2009
7606449 Adaptive switch contamination compensation Oct. 20, 2009
7589505 Power supply with reliable voltage feedback control independent of any ground voltage difference Sep. 15, 2009
7589985 Switching Regulator Sep. 15, 2009
7579784 Switching power supply and its control circuit, and electronic apparatus employing such switching power supply Aug. 25, 2009
7564196 Power supply device, and LED device and electronic device using same Jul. 21, 2009
7565559 Method and system for communicating filter compensation coefficients for a digital power control system Jul. 21, 2009
7545120 AC-DC adapter and battery charger integration for portable information handling systems Jun. 9, 2009
7529532 Switch circuit and method of switching radio frequency signals May. 5, 2009
7502950 Dual power supply switching system operating in parallel for providing power to a plurality of LED display modules Mar. 10, 2009
7477096 Radiation tolerant DC/DC converter with non-radiation hardened parts Jan. 13, 2009
7397262 Burn-in system power stage Jul. 8, 2008
7394230 Total charge measurement Jul. 1, 2008
7368891 Charge control method of capacitor in thyristor converter May. 6, 2008
7363522 Apparatus and methods for information handling system with power supply device with variable output power Apr. 22, 2008
7340626 Image forming apparatus Mar. 4, 2008
7337341 Computer system and power management method thereof wherein central processing unit does not support the hyper transport technology Feb. 26, 2008
7294993 Method and apparatus for customizing of a power supply based on load characteristic data Nov. 13, 2007
7249267 Method and system for communicating filter compensation coefficients for a digital power control system Jul. 24, 2007
7224562 Short-circuit protective circuit May. 29, 2007
7139920 Method and apparatus for supplying power in electronic equipment Nov. 21, 2006
7013396 Circuit for enabling dual mode safe power-on sequencing Mar. 14, 2006
6996389 Power supply for a satellite receiver Feb. 7, 2006
6965291 Circuit component and transformer device with controllable impedance and with systems equipped with such devices Nov. 15, 2005
6954039 Driving circuit for light emitting diodes Oct. 11, 2005
6836092 Methods and circuits for detecting operational information of DC Fans Dec. 28, 2004
6812587 Continuous power supply with back-up generation Nov. 2, 2004
6801025 Method and apparatus for control of voltage regulation Oct. 5, 2004
6756773 Switching mode power supply with forward-looking regulation for a pulsed load Jun. 29, 2004
6674263 Control system for a renewable energy system Jan. 6, 2004
6654592 Method and arrangement for adjusting output power of a transmitter power supply Nov. 25, 2003
6617831 Electrical power supply converter Sep. 9, 2003
6581842 Data carrier with regulation of the power consumption Jun. 24, 2003
6580254 Apparatus and method for providing span power to communication equipment at a customer premise Jun. 17, 2003
6572546 Two level power supply and method for ultrasound transmission Jun. 3, 2003
6476315 Solar system for a motor vehicle Nov. 5, 2002
6460168 Method of designing power supply circuit and semiconductor chip Oct. 1, 2002
6433981 Modular current sensor and power source Aug. 13, 2002
6361645 Method and device for compensating wafer bias in a plasma processing chamber Mar. 26, 2002
6271508 System and method for providing RF power to a load Aug. 7, 2001
6181115 Device for generating electrical energy for a power supply bus Jan. 30, 2001
6163140 Start-up circuit for voltage regulators Dec. 19, 2000
6037757 Power control unit having switching phase control for reducing voltage drop at a power supply Mar. 14, 2000
6028373 Power supply distributed load startup system Feb. 22, 2000
6011383 Low powering apparatus for automatic reduction of power in active and standby modes Jan. 4, 2000
5990460 Voltage-dependent automatic cooking apparatus and method Nov. 23, 1999
5936514 Power supply input circuit for field instrument Aug. 10, 1999
5874827 Voltage supply circuit for a load absorbing high tentative peak current Feb. 23, 1999
5838137 Method for determining optimal capacity of auxiliary electric source system for an electric vehicle Nov. 17, 1998
5797964 Selectively programmable variable-voltage direct-current voltage source Aug. 25, 1998

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