1
Michael M Walters, Charles E Hawkes: DC-to-DC converter with inductor current sensing and related methods. Harris Corporation, Allen Dyer Doppelt Milbrath & Gilchrist P A, November 9, 1999: US05982160 (138 worldwide citation)

A DC-to-DC power converter includes at least one power switch, a pulse width modulation circuit for generating control pulses for the at least one power switch, an output inductor connected to the at least one power switch, and a current sensor connected in parallel with the inductor for sensing cur ...


2
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 ...


3
Leonard J Hitchcock, Michael M Walters, Ronnie A Wunderlich: Resonant-transition DC-to-DC converter. IBM Corporation, Sterne Kessler Goldstein & Fox, July 21, 1992: US05132889 (74 worldwide citation)

The present invention is a circuit and method for reducing switching losses in a full bridge, resonant transition, switching power converter. The converter circuit includes a bridge switching circuit having an FET switch in each leg of the bridge. Each FET has a parasitic drain-to-source capacitance ...


4
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 ...


5
Michael M Walters: DC-DC converter with adaptive zero-voltage switching. International Business Machines Corporation, William H Steinberg, October 20, 1992: US05157592 (62 worldwide citation)

A circulating current control for a phase shifted full bridge inverter is provided to control the powder dissipation and efficiency of the converter responsive to changing operating conditions. The minimum circulating current necessary for zero-voltage switching is regulated by adjusting the reset c ...


6
Gerhard G Lange, Michael M Walters: Standby boost converter. International Business Machines, William H Steinberg, January 12, 1993: US05179508 (60 worldwide citation)

A boost voltage converter is combined with any DC-DC converter to provide a power system with significant overall power efficiency improvement in applications requiring continuous operation through low line transient levels. The boost converter is normally in a standby mode and only operates when th ...


7
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 ...


8
Michael M Walters: Monolithic magnetic device with printed circuit interconnections. International Business Machines Corporation, William H Steinberg, April 5, 1994: US05300911 (51 worldwide citation)

A monolithic magnetic device having a plurality of transformer elements having single turn primaries and single turn secondaries fabricated on a plate of ferrite which has the outline of a ceramic leadless chip carrier. Each of the magnetic elements has a primary winding formed from a copper via pla ...


9
Charles E Hawkes, Michael M Walters, Thomas A Jochum: Multiple output DC-to-DC converter having enhanced noise margin and related methods. Intersil Corporation, Allen Dyer Doppelt Milbrath & Gilchrist P A, May 2, 2000: US06058030 (49 worldwide citation)

A circuit includes a plurality of DC-to-DC converter circuits and separates in time switching of the respective power switches of the DC-to-DC converter circuits which would otherwise be switching at nearly a same time, such as based upon a same desired output level. The switching time may be separa ...


10
Michael M Walters, Vladimir Muratov, Sefan Wlodzimierz Wiktor: Synthetic ripple regulator. Intersil Americas, Gary R Stanford, November 7, 2006: US07132820 (46 worldwide citation)

A synthetic ripple regulator including a synthetic ripple voltage generator that generates a synthetic ripple voltage indicative of the ripple current through an output inductor. The regulator uses the synthetically generated ripple voltage to control toggling of a hysteretic comparator for developi ...