Offset compensation apparatus for biasing an analog comparator

Details Offset compensation apparatus for biasing an analog comparator Offset compensation apparatus for biasing an analog comparator

1981-07-30

1983-11-22

Anagnos, Larry N.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307297, 307491, 307496, 330 9, H03K 508, G06G 7186, H03F 102

Patent

active

044171609

ABSTRACT:
A threshold comparator for use with a dual slope A/D converter has its input potential established at its threshold potential during auto-zeroing. Potential offset means is included in the auto-zero feedback loop around the integrating and output amplifiers of the A/D circuit. Bias current applied to the potential offset means substantially tracks current passed in the comparator so that the potential developed by the potential offset means substantially tracks the threshold potential of the comparator.

REFERENCES:
patent: 3988689 (1976-10-01), Ochi et al.
patent: 4110641 (1978-08-01), Payne
patent: 4163947 (1979-08-01), Weedon
patent: 4251743 (1981-02-01), Hareyama
patent: 4328434 (1982-05-01), Geller
patent: 4377759 (1983-03-01), Ohhata et al.

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