Mark Alan Martin

US Patent:

D493114, Jul 20, 2004

Filed:

Sep 12, 2003

Appl. No.:

29/189936

Inventors:

Mark G. Martin - Monrovia CA

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

1004

US Classification:

D10 83, D10 87, D10 97

US Patent:

6774828, Aug 10, 2004

Filed:

Jan 20, 2004

Appl. No.:

10/761887

Inventors:

Norman C. Lee - Monterey Park CA
Mark V. Martin - Redondo Beach CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

H03M 112

US Classification:

341118, 341120

Abstract:

Conversion errors of the prior art are reduced by a piece wise linear analog to digital converter. The analog to digital (A/D) converter operates between a minimum voltage and a maximum voltage and uses one or more comparators to generate one or more digital bits, each of the digital bits representative of a conversion voltage. A first voltage interval is allocated for linear analog to digital conversion. This first voltage interval extends from the minimum voltage to an intermediate voltage, where the intermediate voltage is less than the maximum voltage. A second voltage interval extends from the intermediate voltage to the maximum voltage. An error correcting band is encoded in the analog signal between the first voltage interval and the second voltage interval. Each of the comparators used in the A/D has a sensing level. The error correcting band is centered with respect to one of the sensing levels, the sensing level located at the intermediate voltage.

US Patent:

6803794, Oct 12, 2004

Filed:

Feb 26, 2003

Appl. No.:

10/375563

Inventors:

Mark V. Martin - Redondo Beach CA
John J. Drab - Santa Barbara CA

Assignee:

Raytheon Company - Waltham MA

International Classification:

G01R 1900

US Classification:

327 52, 327 54, 330258

Abstract:

A differential capacitance sense amplifier capable of measuring a small difference-signal capacitance in the presence of circuit mismatches and large unequal interconnect capacitances. The sense amplifier includes three sections: a common-mode section applies a âreadâ voltage to two capacitors in a manner that rejects unequal interconnect capacitance, a difference-mode section generates a signal proportional to the capacitance difference between the two capacitors, and an offset-canceling section compensates for circuit mismatches in the difference-mode section. The amplifier can be adapted for use as a sense amplifier for a ferroelectric differential capacitance memory unit.

US Patent:

D498119, Nov 9, 2004

Filed:

Jul 25, 2003

Appl. No.:

29/187058

Inventors:

Mark G. Martin - Monrovia CA
Tristan M. Christianson - San Francisco CA

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

0701

US Classification:

D 7605

US Patent:

D499828, Dec 14, 2004

Filed:

Oct 14, 2003

Appl. No.:

29/191760

Inventors:

Mark G. Martin - Monrovia CA
Tristan M. Christianson - San Francisco CA

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

2605

US Classification:

D26 65

US Patent:

D507673, Jul 19, 2005

Filed:

Oct 26, 2004

Appl. No.:

29/215843

Inventors:

Mark G. Martin - Monrovia CA, US

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

2605

US Classification:

D26 60, D26 61

US Patent:

D510347, Oct 4, 2005

Filed:

Aug 30, 2004

Appl. No.:

29/212378

Inventors:

Mark G. Martin - Monrovia CA, US

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

1499

US Classification:

D14299

US Patent:

D511599, Nov 15, 2005

Filed:

Sep 8, 2004

Appl. No.:

29/212888

Inventors:

Mark G. Martin - Monrovia CA, US

Assignee:

Sharper Image Corporation - San Francisco CA

International Classification:

1505

US Classification:

D32 18