Parallel architecture for a bandpass sigma-delta modulator

Details Parallel architecture for a bandpass sigma-delta modulator Parallel architecture for a bandpass sigma-delta modulator

1997-05-30

2000-08-29

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

H03M 300

Patent

active

061115312

ABSTRACT:
A bandpass sigma-delta modulator includes a first low pass sigma-delta modulator of a predetermined order and operative according to a predetermined transfer characteristic for producing a first output of an initial dynamic range. A second low pass sigma-delta modulator substantially similar to the first low pass sigma-delta modulator is disposed in parallel relationship with the first modulator. Cross-coupled connections between the first and second modulators are operative to alter the respective transfer characteristics such that the first and second low pass modulator outputs cooperate to form the bandpass transfer function and expand the dynamic range beyond that associated with the individual modulators.

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