Over-current protection circuit

Details Over-current protection circuit Over-current protection circuit

2005-04-26

2005-04-26

Tibbits, Pia (Department: 2838)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C348S380000

Reexamination Certificate

active

06885531

ABSTRACT:
An over-current protection circuit is used to prevent damage to a television receiver due to excessive beam current. The television receiver includes a high voltage generating circuit for supplying a beam current to a picture tube. The over-current protection circuit a measurement circuit for directly detecting the beam current, a comparison circuit for comparing the detected beam current with a predefined threshold level, and an output circuit coupled to a control input of the high voltage generating circuit, for generating a control signal for turning off the high voltage generating circuit.

REFERENCES:
patent: 4017681 (1977-04-01), Smeulers et al.
patent: 4599643 (1986-07-01), Harlan
patent: 5043639 (1991-08-01), Gurley et al.
patent: 5889557 (1999-03-01), Sato
patent: 5920474 (1999-07-01), Johnson et al.
patent: 6008842 (1999-12-01), Nagata

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