Terminator current driver with short-circuit protection

Details Terminator current driver with short-circuit protection Terminator current driver with short-circuit protection

1988-05-16

1989-05-16

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3072966, 307270, 307544, 307549, 323311, 361 92, 361101, H03K 1716

Patent

active

048312835

ABSTRACT:
A drive circuit for terminators in a SCSI (Small Computer Standard Interface) system comprises a bipolar transistor operating in saturated condition to keep the voltage drop to less than 200 millivolts. A second transistor serves to detect when, due to overcurrent conditions, the first transistor goes out off saturation and turns it off. Also provided is means for ensuring that the first transistor turns on before the second transistor on power-up.

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Garth, "Interconnection of ECL Circuits for Maximum Gate Density", IEEE Int'l Conv. Conf. Digest, New York, USA, 23-26 Mar. 1970, pp. 256-257.
Ainscow, "Remote Termination of Transmission Lines", IBM T.D.B., vol. 13, No. 6, Nov. 1970, pp. 1614-1615.
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