Barry S Signoretti from Ridgefield, WA, age 78

Bootstrap Circuit For H-Bridge Structure Utilizing N-Channel High-Side Fets
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US Patent:

8022746, Sep 20, 2011
Filed:

Feb 7, 2008
Appl. No.:

12/027781
Inventors:

Barry Signoretti - Milpitas CA, US
David I. Anderson - Saratoga CA, US
Jianhui Zhang - San Jose CA, US
Assignee:

National Semiconductor Corporation - Santa Clara CA
International Classification:

H03K 3/00
US Classification:

327423, 327424, 327390, 327588, 327589
Abstract:

The invention relates to an apparatus and method for driving high-side switching devices in an H-Bridge circuit. The apparatus includes first and second N-Channel high-side switching devices. Each of the high-side switching devices is associated with, and is selectively driven by, a driver circuit. Each of the driver circuits is associated with, and is powered from, a bootstrap capacitor. The apparatus further includes a cross-couple circuit that is arranged to charge each of the bootstrap capacitors based, at least in part, on whether the low-side switching device that is associated with the other bootstrap capacitor is open or closed.

Apparatus And Method For Charge Storage And Recovery For Variable Output Voltage Regulators
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US Patent:

7821244, Oct 26, 2010
Filed:

Jul 31, 2008
Appl. No.:

12/183945
Inventors:

Barry Signoretti - Milpitas CA, US
Jianhui Zhang - San Jose CA, US
David I. Anderson - Saratoga CA, US
Assignee:

National Semiconductor Corporation - Santa Clara CA
International Classification:

G05F 1/40
G05F 1/56
US Classification:

323288, 323271
Abstract:

A circuit for voltage regulation is provided. The circuit includes a variable output voltage regulator and an output capacitor circuit. The output capacitor circuit includes at least two output capacitors and at least one switch. The variable output voltage regulator is capable of providing a regulated DC output voltage at two or more different voltage levels. When the output voltage is changed to a lower output voltage level, one of the output capacitors in the output capacitor circuit is switched out of the circuit to conserve the charge stored on it. When the output voltage returns to the higher output voltage level, the output capacitor that was switched out is switched back in.