Eprom controlled tri-port transceiver

Details Eprom controlled tri-port transceiver Eprom controlled tri-port transceiver

1987-04-06

1988-08-02

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

375 10, 340825030, 370 58, H04Q 1104, H04J 304

Patent

active

047616474

ABSTRACT:
A tri-port transceiver for receiving, switching and transmitting digital information among its ports. An input to each port is coupled to a multiplexer of each other port, wherein the multiplexer of each other port, wherein the multiplexers provide the switching of signals onto other ports. A buffer and a latch are used to couple each input port signal to the multiplexers, and a driver coupled to the multiplexer provides transmission of the selected signal from the multiplexer. An EPROM based PLA operates as a programmable state machine to generate control signals to the tri-port transceiver. In one embodiment, a programmable output impedance driver is used.

REFERENCES:
patent: 3952212 (1976-04-01), Matsumoto et al.
patent: 4609986 (1986-09-01), Hartmann et al.
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4646286 (1987-02-01), Reid et al.
patent: 4723120 (1988-02-01), Petty, Jr.
patent: 4725835 (1988-02-01), Schreiner et al.
patent: 4726015 (1988-02-01), Nirschl

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