Board removal detection circuit

Details Board removal detection circuit Board removal detection circuit

1992-04-16

1994-04-19

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 340687, 324133, 324158R, G08B 2100

Patent

active

053049870

ABSTRACT:
In a circuit module (100) that removably plugs into a backplane carrier (11) that provides both a power connection (713) and a ground connection (714,715) to the module, a circuit (150) in the module responds to power outage on the module by using the presence or absence of the ground connection to determine whether the circuit module has been unplugged from the carrier. Upon restoration of power, a circuit (203) responds to the determination by affecting functionality of the module in one or another manner depending upon whether the module had or had not been unplugged from the carrier.

REFERENCES:
patent: 4042832 (1977-08-01), Cassarino, Jr. et al.
patent: 4507697 (1985-03-01), Ozil et al.
patent: 4949035 (1990-08-01), Palmer, II

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