Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1988-11-10
1991-03-12
Pellinen, A. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
315 8, H01J 2900
Patent
active
049997327
ABSTRACT:
A degaussing circuit for degaussing a cathode ray tube has a degaussing coil mounted on the back of the catode ray tube and a positive temperature coefficient thermistor connected in series with the degaussing coil. The resonance frequency determined by the degaussing coil and the positive temperature coefficient thermistor is set to be below about 14 kHz or above about 17 kHz.
REFERENCES:
patent: 3617800 (1971-11-01), Ishikaw et al.
patent: 4024427 (1977-05-01), Belhomme
patent: 4164775 (1979-08-01), Slegers et al.
patent: 4636911 (1987-01-01), Truskalo
patent: 4737881 (1988-04-01), Haferl
IEEE Transaction on Broadcast & Television Receivers, Feb. 1972, vol. BTR-18, No. 1, "Degaussing Circuits for Color Television Receiver" by Blaha, p. 7.
Gaffin Jeffrey A.
Murata Manufacturing Co. Ltd.
Pellinen A. D.
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