1
Carver A Mead, Ralph Wolf, Timothy P Allen: Paintbrush stylus for capacitive touch sensor pad. Synaptics Incorporated, D Alessandro & Ritchie, January 30, 1996: US05488204 (1203 worldwide citation)

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 capa ...


2
Carver A Mead, Timothy P Allen: Subthreshold CMOS amplifier with offset adaptation. Synaptics, Lyon & Lyon, June 19, 1990: US04935702 (201 worldwide citation)

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 ...


3
Carver A Mead, Timothy P Allen, Federico Faggin: Dynamic synapse for neural network. Synaptics, Lyon & Lyon, October 9, 1990: US04962342 (149 worldwide citation)

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 arra ...


4
Janeen D W Anderson, Carver A Mead, Timothy P Allen, Michael F Wall: CMOS amplifier with offset adaptation. Synaptics Incorporated, Kenneth D Alessandro, October 22, 1991: US05059920 (141 worldwide citation)

Electrons may be placed onto and removed from a floating node associated with at least one MOS transistor, usually the gate of the transistor, in an analog manner, by application of first and second electrical control signals. A first electrical control signal controls the injection of electrons ont ...


5
Janeen D W Anderson, Carver A Mead: MOS device for long-term learning. Synaptics, Lyon & Lyon, September 4, 1990: US04953928 (140 worldwide citation)

A semiconductor structure for long-term learning includes a p-type silicon substrate or well having first and second spaced apart n-type regions formed therein. A polysilicon floating gate is separated from the surface of the silicon substrate by a layer of gate oxide. One edge of the polysilicon fl ...


6
Carver A Mead, Timothy P Allen: CMOS amplifier with offset adaptation. Synaptics Incorporated, Kenneth D Alessandro, November 26, 1991: US05068622 (139 worldwide citation)

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 out ...


7
Timothy P Allen, Adam K Greenblatt, Carver A Mead, Janeen D W Anderson: Writable analog reference voltage storage device. Synaptics Incorporated, Kenneth D Alessandro, November 24, 1992: US05166562 (135 worldwide citation)

A circuit for generating N analog voltage signals for reference or bias use employs N analog floating gate storage devices. Electron injection circuitry is provided for injecting electrons on to and a tunneling structure is provided for removing electrons from the floating gate of each floating gate ...


8
Carver A Mead: High-density photosensor and contactless imaging array having wide dynamic range. Synaptics Incorporated, D Alessandro Frazzini & Ritchie, February 22, 1994: US05289023 (129 worldwide citation)

A photosensing pixel element comprises a bipolar phototransistor used as both an integrating photosensor and a select device. The phototransistor is a vertical structure, having as its collector a first doped region of a first conductivity type disposed in a semiconductor substrate or well structure ...


9
Carver A Mead, Federico Faggin: Integrating imaging systgem having wide dynamic range with sample/hold circuits. Synaptics Incorporated, D Alessandro Frazzini & Ritchie, June 28, 1994: US05324958 (126 worldwide citation)

A bipolar phototransistor comprises both an integrating photosensor and a switching element. The base terminal of the bipolar phototransistor is utilized as the switch-control node for the pixel and its emitter is the output node of the integrating photosensor. A plurality of integrating photosensor ...


10
Janeen D W Anderson, Carver A Mead, Timothy P Allen, Michael F Wall: CMOS winner-take all circuit with offset adaptation. Synaptics Incorporated, Kenneth D Alessandro, September 8, 1992: US05146106 (121 worldwide citation)

An adaptable MOS winner take all circuit includes a plurality of adaptable current mirrors. Each adaptable current mirror includes a floating node onto which and from which electrons may be transported by control signals and electrical semiconductor structures. Electrons may be placed onto and remov ...