Method and improved apparatus for stabilizing analog-to-digital

Details Method and improved apparatus for stabilizing analog-to-digital Method and improved apparatus for stabilizing analog-to-digital

1993-07-26

1995-01-03

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341155, H03M 302

Patent

active

053790391

ABSTRACT:
An analog-to-digital (A/D) circuit comprising a multi-pole gain stage, a quantizer, and a feedback stage is stabilized when an analog input signal is excessive in the following manner. A stabilization detector continually samples a representation of stabilization of the A/D circuit. When the representation of stabilization is unfavorable, the stabilization detector increases, via a stabilizer, phase margin by adjusting the pole locations of the multi-pole gain stage based on the degree of unfavorability of the representation of stabilization. With the increased phase margin, the A/D circuit continues to provide digital representations of the analog input signal.

REFERENCES:
patent: 5012244 (1989-10-01), Wellard et al.
patent: 5083304 (1992-01-01), Cahill

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