Analog-to-digital converter of the sigma delta type

Details Analog-to-digital converter of the sigma delta type Analog-to-digital converter of the sigma delta type

2006-12-04

2009-12-08

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07629912

ABSTRACT:
An analog-to-digital converter (ADC1) of the Sigma Delta type provides a stream of digital output samples (OUT) in response to an analog input signal (IN). The analog-to-digital converter (ADC1) comprises a quantizer (QNT) that has a dead zone. The quantizer (QNT) provides a digital output sample that has a neutral value when the quantizer (QNT) receives an input signal whose amplitude is within the dead zone. A feedback path (DAC) within the analog-to-digital converter (ADC1) provides a feedback action only in response to a digital output sample that has a value other than the neutral value.

REFERENCES:
patent: 5587708 (1996-12-01), Chiu
patent: 6570518 (2003-05-01), Riley et al.
patent: 2266203 (1993-10-01), None

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