Input bias current compensation for a comparator

Details Input bias current compensation for a comparator Input bias current compensation for a comparator

1991-11-08

1992-07-07

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307491, 3072966, H03K 500, H03K 1716, G05F 322

Patent

active

051285649

ABSTRACT:
A current compensation circuit for a comparator includes a pair of switching transistors which supply input bias current to their corresponding comparator input transistors, a pair of current to voltage conversion means which use collector current from the comparator input transistors to turn on and off the appropriate switching transistor when its corresponding comparator input transistor is on, a transistor to generate a negative replica of the input bias current flowing in the comparator input, and a current mirror which is programmed by the replica of the uncompensated input bias current to produce a compensated input bias current to the switching transistors.

REFERENCES:
patent: 4591743 (1986-05-01), Kung
patent: 4760286 (1988-07-01), Pigott
patent: 5039888 (1991-08-01), Bell et al.

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