Delta-sigma analog-to-digital converter suitable for use in...

Details Delta-sigma analog-to-digital converter suitable for use in... Delta-sigma analog-to-digital converter suitable for use in...

2007-05-08

2007-05-08

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000, C341S155000

Reexamination Certificate

active

11249236

ABSTRACT:
A radio receiver channel includes an analog front end and a digital signal processing section coupled together by an analog-to-digital converter (ADC) having a delta-sigma modulator coupled to a first digital decimation filter, which is coupled to second digital decimation filter, wherein the first decimation filter includes a source of finite impulse response coefficients coupled so as to provide a plurality of coefficients. The delta-sigma modulator includes a loop filter having a plurality of serially coupled integrators, and a multi-bit quantizer coupled to the loop filter; the multi-bit quantizer including an ADC operable to produce a multi-bit digital output signal, the ADC coupled to a DAC having dual DAC feedback loops, and a dynamic element matching function. In one embodiment, the delta-sigma modulator includes a fifth-order loop filter having five serially coupled integrators with a feedback path from the output to the input of the fifth integrator and a feedback path from the output to the input of the third integrator.

REFERENCES:
patent: 6160859 (2000-12-01), Martin et al.
patent: 6304608 (2001-10-01), Chen et al.
patent: 6384761 (2002-05-01), Melanson
patent: 6674381 (2004-01-01), Gomez et al.
patent: 6930624 (2005-08-01), Hezar et al.
patent: 7034731 (2006-04-01), Uramoto et al.
patent: 2004/0057534 (2004-03-01), Masenten et al.

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