Bandpass delta-sigma analog-to-digital converters

Details Bandpass delta-sigma analog-to-digital converters Bandpass delta-sigma analog-to-digital converters

2006-10-24

2006-10-24

Williams, Howard L. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

Reexamination Certificate

active

07126516

ABSTRACT:
An apparatus includes a delta-sigma analog-to-digital converter for digitalizing an analog input signal. The Δ-Σ ADC includes an analog band-pass loop filter configured to filter an analog signal derived from the analog input signal and a quantizer configured to produce a series of digital signals by sampling the filtered analog signal from the loop filter at a sampling frequency. The loop filter has a center band-pass frequency. The series of digital signals has a data-carrying frequency spectrum that is a mirror image of a data-carrying frequency spectrum of the analog input signal. The data-carrying frequency spectrum of the series is located between the center band-pass frequency and zero.

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