With A Three Or More Terminal Semiconductive Device In Control Circuit Patents (Class 323/292)
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Patent number: 9018576Abstract: Disclosed is a low drop-out voltage regulator circuit with a distributed output network coupled to a pixel array for use in image sensor circuitry. The regulator circuit comprises voltage regulating circuitry and a distributed output network, wherein the distributed output network comprises drive transistors disposed along and connected between a supply track and an output track. The spatial distribution of the drive transistors improves heat dissipation within the regulator circuit, and a combination of low current flow and regulated output voltage reduces IR drop across the output track. The improved heat dissipation increases device lifespan and performance, whereas the reduction in IR drop across the output track provides better pixel response, readout uniformity, and image quality.Type: GrantFiled: May 10, 2011Date of Patent: April 28, 2015Assignee: STMicroelectronics Asia Pacific Pte LtdInventors: Jingfeng Gong, Yann Desprez-le-Goarant
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Patent number: 8952619Abstract: A distributed system for driving strings of series-connected LEDs for backlighting, display and lighting applications includes multiple intelligent satellite LED driver ICs connected to a an interface IC via serial bus. The interface IC translates information obtained from a host microcontroller into instructions for the satellite LED driver ICs pertaining to such parameters as duty factor, current levels, phase delay and fault settings. Fault conditions in the LED driver ICs can be transmitted back to, the interface IC. An analog current sense feedback system which also links the LED driver ICs determines the supply voltage for the LED strings.Type: GrantFiled: January 10, 2012Date of Patent: February 10, 2015Assignee: Advanced Analogic Technologies IncorporatedInventors: Richard K. Williams, Kevin D'Angelo, David A. Brown, George A. Hariman
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Patent number: 8933634Abstract: A distributed system for driving strings of series-connected LEDs for backlighting, display and lighting applications includes multiple intelligent satellite LED driver ICs connected to a an interface IC via serial bus. The interface IC translates information obtained from a host microcontroller into instructions for the satellite LED driver ICs pertaining to such parameters as duty factor, current levels, phase delay and fault settings. Fault conditions in the LED driver ICs can be transmitted back to the interface IC. An analog current sense feedback system which also links the LED driver ICs determines the supply voltage for the LED strings.Type: GrantFiled: January 10, 2012Date of Patent: January 13, 2015Assignee: Advanced Analogic Technologies IncorporatedInventors: Richard K. Williams, Kevin D'Angelo, David A. Brown, George A. Hariman
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Patent number: 7710086Abstract: 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 regulate the output voltage of the high voltage power supply, as well as, to sink or source current from the high voltage supply.Type: GrantFiled: May 28, 2008Date of Patent: May 4, 2010Assignee: Sandia CorporationInventors: James F. Stamps, Daniel D. Yee
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Patent number: 5754074Abstract: A protected switch has a power first semiconductor device having a first main electrode for coupling to a first voltage supply line, a second main electrode coupled to a first terminal for connection via a load to a second voltage supply line and an insulated gate electrode coupled to a control terminal for supplying a gate control signal to enable conduction of the power semiconductor device. A control arrangement has a normally off second semiconductor device having first and second main electrodes coupling the normally off semiconductor device between the gate electrode of the power semiconductor device and one of the first and second main electrodes of the power first semiconductor device and a control electrode coupled via a resistance to the gate electrode of the power semiconductor device thereby causing the normally off semiconductor device to be rendered conducting when a gate control signal is supplied to the gate electyrode to enable conduction of the power semiconductor device.Type: GrantFiled: November 30, 1995Date of Patent: May 19, 1998Assignee: U. S. Philips CorporationInventor: Brendan P. Kelly
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Patent number: 5661374Abstract: A current consumption control system for controlling the current draw of an electric power-consuming device, e.g., a modular strip lighting unit for a lighting system including at least one said unit, in which the strip lighting unit includes at least one light source element operatively coupled to a lighting circuit. The lighting circuit may illustratively comprise at least one pair of primary conduction lines connectable to a voltage source, and coupled in electrical circuit relationship with a current regulating circuit. The current regulating circuit includes an operational amplifier which is coupled with the primary conduction lines to generate a reference voltage, and which is coupled with positve and negative current input lines, with at least one power-consuming device coupled to the current output of the operational amplifier, and to the negative current input line.Type: GrantFiled: August 15, 1996Date of Patent: August 26, 1997Assignee: Astronics CorporationInventors: Robert E. Cassidy, Douglas J. Livingston
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Patent number: 5347209Abstract: A method and apparatus for predict-ahead pulse-to-pulse voltage control in a pulsed power supply system is disclosed. A DC power supply network is coupled to a resonant charging network via a first switch. The resonant charging network is coupled at a node to a storage capacitor. An output load is coupled to the storage capacitor via a second switch. A de-Q-ing network is coupled to the resonant charging network via a third switch. The trigger for the third switch is a derived function of the initial voltage of the power supply network, the initial voltage of the storage capacitor, and the present voltage of the storage capacitor. A first trigger closes the first switch and charges the capacitor. The third trigger is asserted according to the derived function to close the third switch. When the third switch is closed, the first switch opens and voltage on the node is regulated. The second trigger may be thereafter asserted to discharge the capacitor into the output load.Type: GrantFiled: August 21, 1992Date of Patent: September 13, 1994Assignee: The United States of America as represented by the United States Department of EnergyInventors: Anthony N. Payne, James A. Watson, Stephen E. Sampayan