Protective circuit for providing a reference voltage at a backpl

Details Protective circuit for providing a reference voltage at a backpl Protective circuit for providing a reference voltage at a backpl

1991-02-12

1992-07-14

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

3072966, 361 98, G05F 1573

Patent

active

051306360

ABSTRACT:
A self-correcting protective circuit for providing a reference voltage to a backplane bus wherein the circuit includes a primary transistor, current sensing resistor and diode connected between a supply voltage and the backplane. The combination of a current-limiting resistor and a control transistor is used to sense current flow to the board through the primary transistor and limit same when the backplane bus voltage fluctuates.

REFERENCES:
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patent: 3509450 (1970-04-01), McNulty
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patent: 3629692 (1971-12-01), Goyer
patent: 3996498 (1976-12-01), Scharde
patent: 4074334 (1978-02-01), D'Arrigo
patent: 4660121 (1987-04-01), Kapfer et al.
patent: 4661879 (1987-04-01), Sato et al.
patent: 4675551 (1987-06-01), Stevenson et al.
patent: 5006734 (1991-04-01), Engelbrecht

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