Delta-sigma modulation analog to digital converter

Details Delta-sigma modulation analog to digital converter Delta-sigma modulation analog to digital converter

1990-08-16

1991-11-26

Scott, J. R.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

375 28, H03M 302

Patent

active

050686593

ABSTRACT:
A delta-sigma modulation analog to digital converter for converting an analog input signal to a digital output signal. The converter includes an input circuit for receiving the analog input signal, a clock generator for generating a very high frequency clock signal with first and second phases, a first switching circuit coupled to the input circuit for modulating the analog input signal with the very high frequency clock signal, an integration circuit coupled to the first switching circuit for integrating the modulated input signal and generating a noise signal, a second switching circuit coupled to the integration circuit both for demodulating the integrated modulated input signal and modulating the noise signal with the very high frequency clock signal, a quantizing circuit coupled to the second switching circuit and responsive to the demodulated input signal and the modulated noise signal for generating the digital output signal including a separable portion corresponding to the modulated noise signal and a feedback circuit coupled between the quantizing circuit and the integration circuit both for generating a feedback signal corresponding to the digital output signal and feeding the feedback signal to the integration circuit.

REFERENCES:
patent: 4837527 (1989-06-01), Sauer
patent: 4896156 (1990-01-01), Garverick

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