Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1975-07-10
1977-02-22
Wilbur, Maynard R.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
315387, H01J 2970, H01J 2976
Patent
active
040094260
ABSTRACT:
A voltage regulator for a thyristor deflection system of the commutating network type includes a reverse current control network which couples a source of direct current to the commutating network. The reverse current control network includes a diode which provides for energy transfer from the source of direct current to the commutating network during a first portion of the energy storage interval and a silicon controlled rectifier (SCR) which provides for energy transfer from the commutating network to the source of direct current during a second portion of the energy storage interval after the SCR is enabled. A resistor coupled between the gate and anode electrodes of the SCR provides a gate current for enabling the conduction of the SCR. A disabling network coupled between the deflection system high voltage transformer and the gate of the SCR provides for the diversion of the gate current produced by the resistor for an interval determined by the level of signals produced by the high voltage transformer to control conduction time of the SCR and thereby regulate the voltage in the commutating network.
REFERENCES:
patent: 3221269 (1965-11-01), Davies
patent: 3447031 (1969-05-01), Jenks
patent: 3501650 (1970-03-01), Phoenix
patent: 3858084 (1974-12-01), Manners
patent: 3919599 (1975-11-01), Reh et al.
patent: 3936115 (1976-02-01), Dietz
Blum T. M.
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
Wilbur Maynard R.
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