Detent switching of summing node capacitors of a delta-sigma mod

Details Detent switching of summing node capacitors of a delta-sigma mod Detent switching of summing node capacitors of a delta-sigma mod

1992-11-03

1994-09-27

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341172, H03M 300

Patent

active

053510500

ABSTRACT:
The thermal noise generated through the feedback capacitor of a delta-sigma modulator is attenuated by transferring a reference voltage through the capacitor in two separate steps during each sampling period. This permits a reduction in the size of the feedback capacitor, thereby reducing thermal noise, without increasing the voltage on the switching capacitors on the summing node side of the feedback capacitors which would induce degradation due to hot electron effects.

REFERENCES:
patent: 4851841 (1989-07-01), Sooch
patent: 5099195 (1992-03-01), Greer et al.
patent: 5148167 (1992-09-01), Ribner

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