Agere Patent Application to Reduce Power Consumption for Satellite Radios

On Thursday, November 23, 2006, Agere had a patent application disclosed for a satellite radio that uses a single front end, rather that the traditional dual front end analog amplifiers. The advantages are lower power consumption and less cost to build.


United States Patent Application 20060264191
Kind Code A1

Lai; Yhean-Sen

November 23, 2006

Single path front end with digital AGC in SDARS system

Abstract
A method and apparatus for automatically controlling the gain of a digital radio receiving circuit in which a single set of analogue amplifiers is used as the front end to feed two separate digital back-end, demodulating circuits, and in which, for optimal performance, each of the two digital demodulating circuits require the front end analogue amplifiers to operate over a significantly different dynamic range. An automatic-gain-control selector selects one of two automatic-gain control signals to set the gain of the analogue amplifier. In addition, the automatic-gain-control selector sets a compensatory gain of a digital automatic gain control in the back-end circuit not selected, so that the unselected demodulating circuit has substantially the same input signal as if it had been selected. In this way, both demodulating circuits can process the input signal as if they were in control of the analogue amplifier.

Inventors: Lai; Yhean-Sen; (Warren, NJ)

Correspondence Name and Address:
SYNNESTVEDT & LECHNER LLP-AGERE
1101 MARKET STREET
SUITE 2600
PHILADELPHIA
PA
19107-2950
US

Assignee Name and Adress:
Agere Systems Inc.AllentownPA
Serial No.: 133538
Series Code: 11
Filed: May 20, 2005
U.S. Current Class: 455/127.2; 455/127.1
U.S. Class at Publication: 455/127.2; 455/127.1
Intern'l Class: H04Q 7/20 20060101 H04Q007/20


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