Comparator having an offset voltage cancellation circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307362, 307494, H03K 524, H03K 5153

Patent

active

048271616

ABSTRACT:
A comparator using an operational amplifier, includes an input switching circuit for passing an input signal in a first state wherein a comparison is effected and for stopping the input signal in a second state wherein an input offset voltage is cancelled. An output switching circuit holds an output signal in the first state and outputs a held output signal in the second state of the input switching circuit. An input/output switching signal generation circuit generates control signals to switch between the first state and the second states; and a first comparator outputs resultant comparison data in the first state and cancels the input offset voltage in the second state.

REFERENCES:
patent: 4377759 (1983-03-01), Ohhata et al.
patent: 4623854 (1986-11-01), Kuraishi

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