Clyde W Washburn

US Patent:

6549062, Apr 15, 2003

Filed:

Nov 21, 2001

Appl. No.:

09/994083

Inventors:

Clyde Washburn - Victor NY
Robert Bowman - Fairport NY

Assignee:

LSI Logic Corporation - Milpitas CA

International Classification:

H01L 3500

US Classification:

327513, 327565

Abstract:

A deice maximizes the allowable granularity of adjustment of a bus driver line characteristics by compensating for temperature variations by selecting components that have an opposite and approximately equal thermal coefficient. In the first aspect, component parts may be made smaller because their tolerances need not be made so precise. In the second aspect, duplicating the circuitry with matching characteristics allows one circuit to be operational while the other circuit is tested or dormant. Switching between the two circuits is performed seamlessly with no interruption of device operation.

US Patent:

6593825, Jul 15, 2003

Filed:

Sep 6, 2001

Appl. No.:

09/947740

Inventors:

Clyde Washburn - Victor NY

Assignee:

LSI Logic Corporation - Milpitas CA

International Classification:

H03B 512

US Classification:

331117FE, 331177 R, 331167

Abstract:

An oscillator provides output signals over a range of oscillating frequencies includes an resonant circuit, at least one active circuit device operatively coupled to the resonant circuit to supply energy to the resonant circuit, and at least one unidirectional device coupled to the active circuit device. The unidirectional device permits current to flow between the active circuit device and the resonant circuit when the active circuit device adds energy to the resonant circuit, and impedes a drain of energy from the resonant circuit due to increased output signal amplitude.

US Patent:

6606007, Aug 12, 2003

Filed:

Jul 31, 2001

Appl. No.:

09/919222

Inventors:

Clyde Washburn - Victor NY

Assignee:

LSI Logic Corporation - Milpitas CA

International Classification:

H03B 532

US Classification:

331116R, 331132, 331158, 331160, 331167

Abstract:

A circuit and method are disclosed herein for a crystal oscillator, wherein the Q of the resonant network is not reduced through the loading effects of the oscillators resistive bias network. The oscillator is configured as an operational transconductance amplifier (OTA) coupled to the resonant network. The OTA creates a negative resistance, which compensates for energy lost to resistance within the resonant network, thereby sustaining oscillation at the resonant frequency. Instead of using bias resistors to set and maintain the operating point of the oscillator, another OTA (with a high output impedance) injects a current into the resonant network to bias the oscillator. Advantageously, this technique avoids the reduction in Q that occurs when bias resistors are connected across the high effective parallel resistance of the resonant crystal. The higher Q benefits frequency stability and phase jitter characteristics of the oscillator.

US Patent:

7113025, Sep 26, 2006

Filed:

Jul 7, 2004

Appl. No.:

10/886792

Inventors:

Clyde Washburn - Victor NY, US

Assignee:

Raum Technology Corp. - Rochester NY

International Classification:

G05F 1/10

US Classification:

327539, 327541, 323313, 323315

Abstract:

A bandgap reference voltage generating circuit includes a proportional to absolute temperature (PTAT) voltage generating means generating a PTAT voltage. A complementary to absolute temperature (CTAT) voltage generating means generates a CTAT voltage. A temperature coefficient determining means interconnects the PTAT voltage generating means and the CTAT voltage generating means.

US Patent:

7860189, Dec 28, 2010

Filed:

Aug 19, 2005

Appl. No.:

11/208430

Inventors:

Eugene M. Petilli - Victor NY, US
Brian Jadus - Victor NY, US
Clyde Washburn - Victor NY, US
John M. Alvermann - Victor NY, US

Assignee:

Intrinsix Corporation - Marlborough MA

International Classification:

H03K 9/00

US Classification:

375316, 375324, 375335, 375340, 375346, 375350, 455313, 455334

Abstract:

Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.

US Patent:

8391352, Mar 5, 2013

Filed:

May 13, 2008

Appl. No.:

12/119595

Inventors:

Clyde Washburn - Victor NY, US

Assignee:

Integre Technologies, Inc. - Pittsford NY

International Classification:

H04B 1/66

US Classification:

375240, 375280

Abstract:

A method and apparatus by which ATSC-receiver-compatible digital TV signals may be generated without most of the discrete and/or high-complexity components required by the ATSC specification, through the use of a precomputation of digital filter coefficients that consolidates multiple functions into a single step, and through the derivation of multiple required carrier frequencies using a single oscillator circuit. The resulting design meets all requirements of the ATSC specification, reducing significantly the cost of the necessary signal-processing functions, and in a manner compatible with the VLSI (very-large-scale-integrated) circuit technologies of the field.

US Patent:

20070001748, Jan 4, 2007

Filed:

Sep 8, 2006

Appl. No.:

11/518011

Inventors:

Clyde Washburn - Victor NY, US

International Classification:

G05F 1/10

US Classification:

327539000

Abstract:

A bandgap reference voltage generating circuit includes a proportional to absolute temperature (PTAT) voltage generating means generating a PTAT voltage. A complementary to absolute temperature (CTAT) voltage generating means generates a CTAT voltage. A temperature coefficient determining means interconnects the PTAT voltage generating means and the CTAT voltage generating means.

US Patent:

20120068949, Mar 22, 2012

Filed:

Sep 15, 2011

Appl. No.:

13/233790

Inventors:

Clyde Washburn - Victor NY, US
Eric Bohannon - Henrietta NY, US
Imre Knausz - Fairport NY, US
Kirk Hargreaves - Sunnyvale CA, US

Assignee:

SYNAPTICS INCORPORATED - Santa Clara CA

International Classification:

G06F 3/041

US Classification:

345173

Abstract:

An input device processing system comprises a sensor module that transmits a first transmitter signal with a transmitter electrode and receives a resulting signal with a receiver electrode. The first transmitter signal comprises a first transmitter frequency, and the resulting signal comprises effects corresponding to the first transmitter signal. A demodulation module demodulates the resulting signal to produce a first signal (e.g., an upper sideband signal) and a second signal (a lower sideband signal), selectably determines a first measurement of a change in capacitive coupling between the transmitter electrode and the receiver electrode based on at least one of the first and second signals, and determines positional information for an input object based on the first measurement.