Electric lamp and discharge devices: systems – Cathode ray tube circuits – Power supply from deflection circuit source
Patent
1978-05-09
1979-11-27
Hubler, Malcolm F.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Power supply from deflection circuit source
H01J 2900
Patent
active
041763041
ABSTRACT:
A source of unregulated direct voltage is commutated at the horizontal rate by a two-transistor switching regulator and applied across a transformer primary winding. The duty cycle of the alternations is controlled to maintain the peak-to-average value of a first portion of the alternations at a constant value. A rectifier serially coupled with a capacitor is coupled across the secondary winding of the transformer and produces a direct voltage across the capacitor from the first portion of the alternations. The junction of the rectifier and secondary winding is grounded. A television horizontal output transistor has its emitter grounded and its collector coupled through an inductance to the other end of the rectifier. A constant energy is stored in the inductance during each deflection cycle for application to the horizontal output stage. The horizontal output transistor is one of the two regulator transistors.
REFERENCES:
patent: 3887840 (1975-06-01), Maytum
patent: 4013923 (1977-03-01), Hollander
patent: 4042859 (1977-08-01), Kashiwagi
patent: 4079294 (1978-03-01), Teuling
patent: 4090111 (1978-05-01), Susuki
patent: 4101815 (1978-07-01), Willis
patent: 4126816 (1978-11-01), Willis
Hubler Malcolm F.
Meise William H.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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