Signal processor suitable for low intermediate frequency (LIF) or zero intermediate frequency (ZIF) operation

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United States of America Patent

PATENT NO 9800281
APP PUB NO 20170201282A1
SERIAL NO

15470989

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Abstract

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A signal processor for a radio frequency (RF) receiver includes a signal processing path having first and second programmable gain amplifiers and first and second offset correction circuits. The first offset correction circuit receives a first digital offset correction word and corrects a first offset of the first programmable gain amplifier by adding a first value corresponding to the first digital offset correction word to an input of the first programmable gain amplifier. The second offset correction circuit receives a second digital offset correction word and corrects a second offset of the second programmable gain amplifier by adding a first value corresponding to the second digital offset correction word to an input of the second programmable gain amplifier. A controller measures offsets of the first and second programmable gain amplifiers during a calibration, and provides the first and second offset correction words in response to the offsets.

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Patent Owner(s)

Patent OwnerAddress
SILICON LABORATORIES INC400 WEST CESAR CHAVEZ AUSTIN TX 78701

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Coban, Abdulkerim L Austin, US 36 208
Kao, James T Los Gatos, US 3 53
Piovaccari, Alessandro Austin, US 38 475
Poorfard, Ramin K Austin, US 2 5

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