Circuit for ground fault detection and switching

Details Circuit for ground fault detection and switching Circuit for ground fault detection and switching

1994-01-24

1996-04-16

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 49, 361 56, 361 88, H02H 900

Patent

active

055088724

ABSTRACT:
A circuit for sensing the loss of a signal ground in an automotive electronic system having a source of electrical power and both a signal ground and a power ground, includes a first sensor coupled to the power ground and between the signal ground and the source of electrical power for generating a first signal responsive to the voltage on the signal ground differing from the voltage on the power ground by more than a first predetermined limit. A latching semiconductor switch is coupled to the first sensor and between the signal ground and the power ground for latching the electrical coupling of the signal ground to the power ground responsive to receiving the first signal.

REFERENCES:
patent: 3696367 (1972-10-01), Inamdar
patent: 3786466 (1974-01-01), Naito et al.
patent: 3801898 (1974-04-01), Young
patent: 4661879 (1987-04-01), Sato et al.
patent: 4725912 (1988-02-01), Wrathall
patent: 5166852 (1992-11-01), Sano

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