Full range input/output comparator

Details Full range input/output comparator Full range input/output comparator

1991-05-06

1992-08-25

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307494, H03F 345

Patent

active

051422441

ABSTRACT:
A comparator circuit includes first and second differential amplifier input stages to which are applied the same differential input signals with each stage being powered by first (V1) and second (V2) operating potentials. The first stage is only responsive to differential input signals ranging in value between V1 and a first state threshold voltage (V.sub.T1) above V2. The second state is only responsive to differential input signals ranging in value between V2 and a second state threshold (V.sub.T2) below V1. Each one of the first and second stages, when operative, produces output signals which can swing fully between V1 and V2 as a function of the input signals. The output signals of the first and second stages are combined in an OR'ing circuit to produce an output signal whose amplitude can swing over the full operating voltage applied to the first and second supply lines for values of differential input signals ranging between V1 and V2.

REFERENCES:
patent: 4585961 (1986-04-01), Daubert
patent: 4825100 (1989-04-01), Caspell
patent: 4859872 (1989-08-01), Hyakutake
patent: 4859961 (1989-08-01), Davenport

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