Wayne Douglas Cox

US Patent:

6806827, Oct 19, 2004

Filed:

Nov 18, 2002

Appl. No.:

10/298447

Inventors:

Andreas Warloe - Fountain Valley CA
Richard Keegan - Palos Verdes Estates CA
Wayne Cox - Harahan LA
Steve Francis Colborne - Long Beach CA
Richard Najarian - Palos Verdes Estates CA

Assignee:

RF Micro Devices, Inc. - Greensboro NC

International Classification:

G01S 514

US Classification:

34235712

Abstract:

The correlation circuitry of the present invention operates in communication with a controller and transform circuitry to concurrently search a range of frequencies by correlating a received signal from the global positioning system (GPS) with a generated frequency and a generated code at a plurality of time offsets. The output of the correlation circuitry is provided to the transform circuitry, such as fast Fourier transform (FFT) circuitry, that transforms the output of the correlation circuitry. The results from the transformation circuitry are used by a GPS receiver to determine a frequency of the received GPS signal and a time offset associated with a ranging code carried in the received GPS signal.

US Patent:

20040095272, May 20, 2004

Filed:

Nov 18, 2002

Appl. No.:

10/298415

Inventors:

Andreas Warloe - Fountain Valley CA, US
Wayne Cox - Harahan LA, US

Assignee:

RF MICRO DEVICES, INC. - Greensboro NC

International Classification:

G01S005/14

US Classification:

342/357060

Abstract:

The controller of the present invention is incorporated in a global positioning system (GPS) receiver and operates to control the power consumed by the receiver by controlling the clocking of numerous domains. Each domain includes circuitry associated with different functions of the receiver. For example, the receiver of the present invention includes domains for each channel, where the channels are used to locate and track GPS signals. When one or more of the channels are not in use, the controller deactivates the clock signal to the one or more unused channels, thereby minimizing the power consumed by the receiver.