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Roy A Hastings, Todd M Neale, Brad Whitney: Programmable mixed-mode integrated circuit architecture. Texas Instruments Incorporated, W Daniel Swayze Jr, W James Brady III, Richard L Donaldson, October 8, 1996: US05563526 (267 worldwide citation)

A programmable mixed-mode circuit (180) has both digital (215,217) and analog (120,120',120") circuit portions. The digital portion (215,217) is provided by programmable digital logic. The analog portion (120,120',120") has a variety of analog circuits, including voltage references (218), high-speed ...


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Roy A Hastings: Efficient switched mode power converter circuit and method. Texas Instruments Incorporated, Mark E Courtney, W James Brady III, Richard L Donaldson, October 10, 1995: US05457624 (53 worldwide citation)

A method and apparatus are disclosed for sustaining efficiency of switched mode power converters over wide load ranges. The method and apparatus can be used with any switched mode power converter having at least one synchronous rectifier (Q.sub.2) capable of being enabled or disabled and coupled, ei ...


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Roy A Hastings, Marco Corsi, William C Johnston: Switch mode power converter and method. Texas Instruments Incorporated, Warren L Franz, Wade James Brady III, Richard L Donaldson, February 4, 1997: US05600234 (53 worldwide citation)

A switch mode power converter (10) is provided. Converter (10) includes a switching cell (12) that transforms an input voltage at input port (22) to an output voltage at output port (24). Switching cell (12) is controlled by a fixed-period, variable on-time control signal from summing comparator (14 ...


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Thomas A Schmidt, Roy A Hastings: Adaptive duty-cycle limiting for overload protection of integrated circuits. Texas Instruments Incorporated, Warren L Franz, W James Brady III, Richard L Donaldson, August 27, 1996: US05550702 (46 worldwide citation)

A technique for which integrated circuit duty-cycle control or pulse width current limiting adaptively responds to the load, allowing a brief inrush current event upon startup of the load, while restricting long-term power dissipation to a lower value. Upon sensing an overcurrent condition, a duty c ...


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Roy A Hastings, Marwan M Hassoun, Neil Gibson, Marco Corsi: Capacitive-summing switch-mode power conversion control. Texas Instruments Incorporated, Ronald O Neerings, Wade James Brady III, Frederick J Telecky Jr, May 23, 2000: US06066943 (39 worldwide citation)

A controller for a power converter wherein there is provided a comparator having an output terminal and first and second input terminals. A switch-mode power train is coupled to the output terminal and operable to receive an unregulated input voltage and provide a regulated output voltage. A feedbac ...


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Nicolas Salamina, Roy A Hastings: Comparator circuit for decreasing shoot-through current on power switches. Texas Instruments Incorporated, Thomas G Eschweiler, James C Kesterson, Richard L Donaldson, July 30, 1996: US05541541 (37 worldwide citation)

A low power, break before make output circuit includes an output transistor pair 12 and 14, a first control circuit 20, a second control circuit 22, a first comparator 16, and a second comparator 18. First control circuit 20 has a first input coupled to a first digital control input and an output co ...


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Roy A Hastings: Ramp voltage generator for differential switching amplifiers. Texas Instruments Incorporated, Alan K Stewart, Wade James Brady III, Richard L Donaldson, June 2, 1998: US05760623 (17 worldwide citation)

A low-power differential switching amplifier (200, 210, 220, 230) is provided which utilizes a unique technique of generating interlaced ramps. The interlacing of the ramps causes the ramp discharge time to be effectively zero, which produces exceptionally accurate sawtooth waveforms with virtually ...


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Roy A Hastings, Nicolas Salamina: High speed biCMOS gate power for power MOSFETs incorporating improved injection immunity. Texas Instruments Incorporated, Mark A Valetti, Carlton H Hoel, Richard L Donaldson, March 7, 2000: US06034413 (15 worldwide citation)

A circuit and method for implementing a MOSFET gate driver. Two bipolar NPN transistors (Q1, Q2), constructed to achieve rail-to-rail swings when driving a capacitive load (23) by overlapping their respective emitter regions (13) over their contained contact regions (19) to prolong internal device s ...


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Roy A Hastings, Nicolas Salamina: High speed biCMOS gate driver for MOSFETs incorporating improved injection immunity. Texas Instruments Incorporated, Christopher L Maginniss, W James Brady III, Richard L Donaldson, August 3, 1999: US05933034 (9 worldwide citation)

A circuit and method for implementing a MOSFET gate driver. Two bipolar NPN transistors (Q1, Q2), constructed to achieve rail-to-rail swings when driving a capacitive load (23) by overlapping their respective emitter regions (13) over their contained contact regions (19) to prolong internal device s ...