Programmable CMOS circuit for user defined chip enable and outpu

Details Programmable CMOS circuit for user defined chip enable and outpu Programmable CMOS circuit for user defined chip enable and outpu

1984-10-25

1987-02-17

Popek, Joseph A.

Static information storage and retrieval

Addressing

365189, G11C 800

Patent

active

046445048

ABSTRACT:
A circuit constructed in accordance with this invention is described which includes a programmable chip enable-output enable buffer (11-X). The chip enable-output enable buffer may be programmed to provide a chip enable function in response to a logical 1 or logical 0 chip enable input signal, an output enable function in response to a logical 1 or logical 0 output enable input signal, or an active powered chip regardless of the provided input signal. The chip enable-output enable buffer is programmed by "programming" selected transistors in the buffer. A P channel transistor (40, 60) is programmed by causing its source to be connected to its drain. An N channel transistor (50, 60) is programmed by causing its source and drain to be disconnected. In one embodiment, the programming is accomplished in the preferred embodiment by either a diffusion process or an ion implantation process.

REFERENCES:
patent: 4408305 (1983-10-01), Kuo

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