Timothy J Allen

US Patent:

51092611, Apr 28, 1992

Filed:

Oct 31, 1990

Appl. No.:

7/607158

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Palo Alto CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

H01L 2714
H01L 2968
H01L 2904
H01L 2348

US Classification:

357 30

Abstract:

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An inverting input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage. The ultraviolet window and capacitor electrodes are arranged such that the ultraviolet light may strike only the desired areas of the structure.

US Patent:

50497588, Sep 17, 1991

Filed:

Oct 31, 1990

Appl. No.:

7/608972

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Palo Alto CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

H03K 17687
H03K 1914
G11C 1140

US Classification:

307246

Abstract:

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An inverting input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage. The ultraviolet window and capacitor electrodes are arranged such that the ultraviolet light may strike only the desired areas of the structure.

US Patent:

51209969, Jun 9, 1992

Filed:

Jun 6, 1990

Appl. No.:

7/535283

Inventors:

Carver A. Mead - Pasadena CA
Federico Faggin - Los Altos Hills CA
Timothy P. Allen - Palo Alto CA
Janeen D. W. Anderson - Femont CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

G11C 2702
H03K 17693

US Classification:

307353

Abstract:

An electronic circuit is disclosed having a sample/hold amplifier connected to an adaptive amplifier. A plurality of such electronic cicuits may be configured in an array of rows and columns. An input voltage vector may be compared with an analog voltage vector stored in a row or column of the array and the stored vector closest to the applied input vector may be identified and further processed.

US Patent:

54882044, Jan 30, 1996

Filed:

Oct 17, 1994

Appl. No.:

8/324438

Inventors:

Carver A. Mead - Pasadena CA
Ralph Wolf - Palo Alto CA
Timothy P. Allen - Los Gatos CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

G08C 2100

US Classification:

178 18

Abstract:

A proximity sensor system includes a touch-sensor pad with a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matrix. The change in capacitance of each node in both the X and Y directions of the matrix due to the approach of an object is converted to a set of voltages in the X and Y directions. These voltages are processed by circuitry to develop electrical signals representative of the centroid of the profile of the object, i. e, its position in the X and Y dimensions. Noise reduction and background level setting techniques inherently available in the architecture are employed. A conductive paintbrush-type stylus is used to produce paint-like strokes on a display associated with the touch-sensor pad.

US Patent:

49357026, Jun 19, 1990

Filed:

Dec 9, 1988

Appl. No.:

7/282176

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Palo Alto CA

Assignee:

Synaptics, Inc. - San Jose CA

International Classification:

H03F 345

US Classification:

330 9

Abstract:

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage.

US Patent:

50830449, Jan 21, 1992

Filed:

May 25, 1989

Appl. No.:

7/357520

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Palo Alto CA
Federico Faggin - Los Altos Hills CA
Janeen D. W. Anderson - Fremont CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

H03K 342
H03K 17693
G11C 2702

US Classification:

307311

Abstract:

An electronic circuit is disclosed having a sample/hold amplifier connected to an adaptive amplifier. A plurality of such electronic circuits may be configured in an array of rows and columns. An input voltage vector may be compared with an analog voltage vector stored in a row or column of the array and the stored vector closest to the applied input vector may be identified and further processed.

US Patent:

50686224, Nov 26, 1991

Filed:

Feb 28, 1990

Appl. No.:

7/486336

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Los Gatos CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

H03F 345

US Classification:

330253

Abstract:

An integrated circuit amplifier having a random input offset voltage is adaptable such that the input offset voltage may be cancelled out. An inverting input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage. The ultraviolet window and capacitor electrodes are arranged such that the ultraviolet light may strike only the desired areas of the structure.

US Patent:

50737597, Dec 17, 1991

Filed:

Oct 31, 1990

Appl. No.:

7/607141

Inventors:

Carver A. Mead - Pasadena CA
Timothy P. Allen - Palo Alto CA

Assignee:

Synaptics, Incorporated - San Jose CA

International Classification:

H03F 316

US Classification:

330288

Abstract:

An integrated circuit amplifier having a random input offset voltage is adaptable such that then input offset voltage may be cancelled out. An inverting input node is a floating input node and is coupled to a source of input signal by a first capacitor. A second capacitor is connected between the output of the amplifier and the floating node. An ultraviolet window above the second capacitor allows the floating node to be charged, by the application of ultraviolet light, to a voltage which effectively cancels the input offset voltage. The ultraviolet window and capacitor electrodes are arranged such that the ultraviolet light may strike only the desired areas of the structure.