Spot killer circuit

Details Spot killer circuit Spot killer circuit

1979-04-25

1980-08-12

Hubler, Malcolm F.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

358220, H01J 2952

Patent

active

042175259

ABSTRACT:
A spot killer circuit wherein when a power switch is turned off, a transistor interconnected between the first gird of a picture tube and a low voltage supply is driven into the cut-off region so that the first grid voltage may be abruptly raised so as to cause the discharge of the picture tube.

REFERENCES:
patent: 2536712 (1951-01-01), Bentley
patent: 2774007 (1956-12-01), Bigelow
patent: 3535445 (1970-10-01), Griffery

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