Input circuit operable under different source voltages in semico

Details Input circuit operable under different source voltages in semico Input circuit operable under different source voltages in semico

1990-01-08

1990-10-23

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307570, 307544, 307363, 307475, 323315, H03K 19003, H03K 19088, H03K 1714, H03K 17687

Patent

active

049654691

ABSTRACT:
An input circuit provided in a MOS semiconductor IC having a compatible characteristics with an external TTL circuit. The input circuit comprises a circuit for generating a fixed reference voltage without depending on any supplied source voltage level, and a circuit for comparing the input voltage with the reference voltage. Therefore, a fixed margin for detecting the logic value of the input signal can be ensured regardless of whether the source voltage supplied is either 3.0 volts or 5.0 volts.

REFERENCES:
patent: 4438352 (1984-03-01), Mardkha
patent: 4717845 (1988-01-01), Dunn
patent: 4723082 (1988-02-01), Asano et al.
patent: 4724343 (1988-02-01), LeRoux et al.
patent: 4803383 (1989-02-01), Hirochi
patent: 4874969 (1989-10-01), Meadows
patent: 4896056 (1990-01-01), Kunieda

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