Transmission line driver with high output impedance at power off

Details Transmission line driver with high output impedance at power off Transmission line driver with high output impedance at power off

1998-09-25

2000-03-14

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Parallel controlled paths

327108, 327401, 326 82, H03K 1762

Patent

active

06037828&

ABSTRACT:
Circuit techniques for allowing the sharing of the same output terminals between transmission line drivers that comply with differing protocols. By inserting isolation transistors at the outputs of line driver circuits, and in a preferred embodiment along the current loop of a current-output line driver circuit, the invention allows the sharing of output pins while meeting all the power on and power off requirements of different protocols.

REFERENCES:
patent: 4972517 (1990-11-01), Kondou et al.
patent: 5463326 (1995-10-01), Raje
patent: 5703519 (1997-12-01), Crook et al.
patent: 5745003 (1998-04-01), Wakimoto
patent: 5767699 (1998-06-01), Bosnyak et al.

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