Error feedback structure for delta-sigma modulators with...

Details Error feedback structure for delta-sigma modulators with... Error feedback structure for delta-sigma modulators with...

2005-10-18

2005-10-18

Tokar, Michael (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S144000, C341S155000

Reexamination Certificate

active

06956513

ABSTRACT:
An error feedback circuit includes a first summer receiving an analog input signal and a feedback signal and outputting a summed signal. A quantizer receives the summed signal and outputs a quantized output signal. A limiter receives the summed signal and outputs a limited summed signal. The limiter limits the limited summed signal to α*(maximum value of input signal), α>1. A second summer receives the limited summed signal and the output signal and outputs an error signal. A filter receives the error signal and outputting the feedback signal. Typically, 1.0<α<2.0, more preferably 1.4<α<1.6. The filter has a transfer function of H1(z)=2z−1−z−2.

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