Ronald A Graham

Address:

415 Still Frst Ter, Sanford, FL 32771

Phone:

(407)3284982

VIN:

1GNFC13J27R365403

Make:

CHEVROLET

Model:

TAHOE

Year:

2007

US Patent:

6759910, Jul 6, 2004

Filed:

Oct 7, 2002

Appl. No.:

10/267027

Inventors:

Danny F. Ammar - Windermere FL
Ronald D. Graham - Clermont FL

Assignee:

Xytrans, Inc. - Orlando FL

International Classification:

H03L 707

US Classification:

331 2, 331 16, 331 17, 331 18, 331 68

Abstract:

A phase locked loop (PLL) frequency synthesizer generates a high frequency signal by generating an output signal from a voltage controlled oscillator of a primary phase locked loop (PLL) circuit. The voltage controlled oscillator output is programmably divided with a reference signal output at a divide ratio such that the outputs are equal to a common phase comparison frequency. An external reference signal used for the primary phase locked loop circuit is isolated by generating a voltage controlled, clean reference signal and filtering and synchronizing the clean reference signal with the external reference signal within a secondary phase locked loop circuit to produce the reference signal output to the primary phase locked loop circuit.

US Patent:

6922110, Jul 26, 2005

Filed:

Jul 2, 2004

Appl. No.:

10/884254

Inventors:

Danny F. Ammar - Windermere FL, US
Ronald D. Graham - Clermont FL, US

Assignee:

Xytrans, Inc. - Orlando FL

International Classification:

H03L007/07
H03L007/16

US Classification:

331 2, 331 16, 331 17, 331 18, 331 68

Abstract:

A phase locked loop (PLL) frequency synthesizer generates a high frequency signal by generating an output signal from a voltage controlled oscillator of a primary phase locked loop (PLL) circuit. The voltage controlled oscillator output is programmably divided with a reference signal output at a divide ratio such that the outputs are equal to a common phase comparison frequency. An external reference signal used for the primary phase locked loop circuit is isolated by generating a voltage controlled, clean reference signal and filtering and synchronizing the clean reference signal with the external reference signal within a secondary phase locked loop circuit to produce the reference signal output to the primary phase locked loop circuit.

US Patent:

7050765, May 23, 2006

Filed:

Jan 8, 2003

Appl. No.:

10/338773

Inventors:

Danny F. Ammar - Windermere FL, US
David Bass - Winter Springs FL, US
Gavin Clark - Tavares FL, US
Ronald D. Graham - Clermont FL, US
Conrad Jordan - Clermont FL, US
Stephen A. Stahly - Orlando FL, US

Assignee:

Xytrans, Inc. - Orlando FL

International Classification:

H04B 1/38

US Classification:

455 903, 455 82, 455 84, 343772

Abstract:

A lightweight millimeter wave outdoor unit includes a lightweight housing with a heat sink and mounting member configured for mounting on the antenna to form a wireless link. A millimeter wave transceiver board is formed of ceramic material and mounted within the housing. It includes a millimeter wave transceiver circuit that has microwave monolithic integrated circuit (MMIC) chips and operable with the transmit and receive boards. An intermediate frequency (IF) board has components forming an intermediate frequency circuit operable with the millimeter wave transceiver circuit. A frequency synthesizer board has a signal generating circuit for generating local oscillator signals to the transceiver circuit. A controller board has surface mounted DC and low frequency discrete devices thereon forming power and control circuits that supply respective power and control signals to other circuits on other boards. A quick connect/disconnect assembly is operative with the housing for allowing the housing to be rapidly connected and disconnected to the antenna circuit contact members interconnect circuits between boards.