Matched current source serial bus driver

Details Matched current source serial bus driver Matched current source serial bus driver

1988-12-22

1989-12-26

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307350, 307451, 307475, 307263, 370 851, H03K 1716

Patent

active

048900109

ABSTRACT:
A matched current source bus driver circuit providing time and magnitude matched currents as sources and sinks to a pair of serial bus lines. A reference current path is established in transistors which are structurally mirrored to the devices sourcing and sinking bus line currents. Time regulated switching of the reference current ensures RF suppression while maintaining the match of the source and sink current sources driving the bus. Selective decoupling during a loss of circuit ground condition eliminates spurious injection of current into either bus line.

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patent: 4818901 (1989-04-01), Young et al.
patent: 4823029 (1989-04-01), Gabara
patent: 4827159 (1989-05-01), Naganuma

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