1
Robert H Isham, Charles E Hawkes, Michael M Walters: Synchronous-rectified DC to DC converter with improved current sensing. Intersil Corporation, Jaeckle Fleischmann & Mugel, June 12, 2001: US06246220 (78 worldwide citation)

A DC to DC buck pulse width modulator converter circuit includes an input, a high side output and a low side output. A high side switch is electrically connected between a common output node and a voltage supply, and controls a flow of current therethrough dependent upon the high side output. A low ...


2
Charles E Hawkes, Michael M Walters, Robert H Isham: Current mode dc/dc converter with controlled output impedance. Intersil Corporation, Jaeckle Fleischmann & Mugel, January 30, 2001: US06181120 (69 worldwide citation)

A DC/DC converter has an output voltage and sources an output current to a load. The DC/DC converter includes an error amplifier with a reference input and a summing input. The reference input is electrically connected to a reference voltage. The summing input is electrically connected to the output ...


3
Michael M Walters, Charles E Hawkes, Robert H Isham: Multi-phase converter with balanced currents. Intersil Corporation, Jaeckle Fleischmann & Mugel, August 21, 2001: US06278263 (52 worldwide citation)

A multi-phase DC/DC converter having an output voltage and including a plurality of converter channels. Each converter channel includes a converter channel input and a converter channel output. Each converter channel is configured for generating a converter channel current and for adjusting said con ...


4
Weihong Qiu, Robert H Isham, Zhixiang Liang: Adaptive PWM pulse positioning for fast transient response. Intersil Americas, Gary R Stanford, November 18, 2008: US07453246 (15 worldwide citation)

An adaptive pulse positioning system for a voltage converter providing an output voltage, the system including a PWM generation circuit, a sensor, and a pulse positioning circuit. The PWM generation circuit generates a PWM signal with PWM pulses for controlling the output voltage of the voltage cont ...


5
Weihong Qiu, Zhixiang Liang, Robert H Isham, Ben A Dowlat, Rami Abou Hamze: PWM controller with dual-edge modulation using dual ramps. Intersil Americas, Gary R Stanford, November 18, 2008: US07453250 (15 worldwide citation)

A dual-edge modulation controller including first and second ramp circuits, first and second comparators, an error amplifier and pulse control logic. The first ramp circuit provides a leading-edge ramp synchronous with a clock. The error amplifier compares a feedback signal with a reference and prov ...


6
Robert H Isham: Multiphase converter controller using single gain resistor. Intersil Americas, Gary R Stanford, December 20, 2005: US06977489 (14 worldwide citation)

A controller for a multiphase converter including an error amplifier, a gain resistor, a current sense circuit and a gain adjust amplifier. The error amplifier generates an error signal based on an error voltage developed across a feedback resistance. The current sense circuit converts each of multi ...


7
Weihong Qiu, Robert H Isham, Zhixiang Liang, Thomas Szepesi: Adaptive PWM pulse positioning for fast transient response. Intersil Americas, Gary R Stanford, January 11, 2011: US07868600 (12 worldwide citation)

An adaptive pulse positioning system for a voltage converter including an adjustable ramp generator, a pulse generator circuit, and a sense and adjust circuit. The adjustable ramp generator has an adjust input and provides a periodic ramp voltage having an adjustable magnitude based on an adjust sig ...


8
Robert H Isham, Weihong Qiu: Active pulse positioning modulator. Intersil Americas, Gary Stanford, May 29, 2012: US08188721 (9 worldwide citation)

An adaptive pulse positioning modulator including a sense circuit which provides a compensation signal indicative of output voltage error, a filter circuit having an input receiving the compensation signal and an output providing an adjust signal, a leading ramp circuit which provides a repetitive f ...


9
Weihong Qui, Shangyang Xiao, Robert H Isham: Adaptive firing order control for dynamic current balance of multiphase voltage regulators. Intersil Americas, Akerman Senterfitt, September 22, 2009: US07592787 (9 worldwide citation)

A pulse width modulation (PWM) modulator for a multiphase power converter and related adaptive firing order (AFO) method includes a multiphase leading edge generator having pulse generating circuitry associated with each of the regulator phases, wherein the pulse generating circuitry generates phase ...


10
Robert H Isham: Bidirectional interface. RCA Corporation, Joseph S Tripoli, George E Haas, Henry I Schanzer, September 11, 1984: US04471243 (9 worldwide citation)

A bidirectional interface circuit whose signal terminals can function as either input or output terminals whereby the interface circuit can couple signals from a microprocessor to a load module or from a source module to the microprocessor.