Backplane driver circuit

Details Backplane driver circuit Backplane driver circuit

1995-01-09

1996-01-16

Hudspeth, David R.

Electronic digital logic circuitry

Interface

Current driving

326 30, 326 33, H03K 190175

Patent

active

054851076

ABSTRACT:
Disclosed is a backplane driver circuit 14' that temporarily clamps its output (PAD) to the termination supply voltage (V.sub.term) during a low to high transition. This termination is applied for a limited period of time determined by the delay through an inverter 14'-15 and a transfer gate 14'-11. This circuit is effective in reducing both the inductive effects of quickly turning the driver off and reflections due to the backplane stubs (L1-L8). Another feature of the driver circuit is that the driver can be plugged into or pulled out of a running system for maintenance without turning the system off. In order to accomplish this, the driver goes into a high impedance state when its supply voltage is turned off.

REFERENCES:
patent: 5023488 (1991-06-01), Gunning
patent: 5132564 (1992-07-01), Fletcher et al.
patent: 5406143 (1995-04-01), Ang
patent: 5406147 (1995-04-01), Coyle et al.
patent: 5430396 (1995-07-01), Morano
patent: 5430400 (1995-07-01), Herlein et al.
patent: 5438282 (1995-08-01), Kuo

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