Driver circuit for an attachment unit interface used in a networ

Details Driver circuit for an attachment unit interface used in a networ Driver circuit for an attachment unit interface used in a networ

1993-05-28

1994-05-03

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307493, 307246, 307254, 307572, H03K 1716

Patent

active

053090365

ABSTRACT:
A driver circuit is to be used with an attachment unit interface in a network system and receives complementary data signals and an enable signal from constant current source and a differential transistor pair which includes a pair of differential transistors and a pair of load resistors. Each of the differential transistors has a gate terminal which receives one of the complementary data signals, a drain terminal which is connected to one of the load resistors, and a source terminal which is connected to the constant current source. A switch network is connected to the drain terminal of the differential transistors and is activated by the enable signal so as to generate a differential voltage output. Each of a pair of source followers has a gate terminal connected to the switch network and a source terminal The source followers receive the differential voltage output from the switch network. A switching transistor has a gate terminal which receives the enable signal, and source and drain terminals which are connected to the source terminal of a respective one of the source followers and which are further connected to a respective external pull-down load resistor. The source and drain terminals of the switching transistor are to be connected to the attachment unit interface.

REFERENCES:
patent: 4748346 (1988-05-01), Emori
patent: 4926065 (1990-05-01), Goy et al.
patent: 4972517 (1990-11-01), Kondou et al.
patent: 5142245 (1992-08-01), Barbu

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