Electric lamp and discharge devices: systems – Condenser in the supply circuit – Condenser in shunt to the load device and the supply
Patent
1981-05-26
1985-01-22
Moore, David K.
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Condenser in shunt to the load device and the supply
315276, 315221, H05B 3700
Patent
active
044954476
ABSTRACT:
A DC-DC converter circuit particularly for use in a photographic flash light emitting device for producing high DC voltage from a low DC voltage such as a battery. Heretofore, the converter transformer of such a circuit has three coils, i.e. a primary coil to be connected to a low DC source, a secondary coil to produce high voltage and a feedback coil for feeding feedback current to the base of a chopping transistor. The purpose of this invention is to eliminate the need for a feedback coil by feeding current from said high voltage in the secondary coil to the base of a transistor.
REFERENCES:
patent: 3491281 (1970-01-01), Penn
patent: 3629648 (1971-12-01), Brown et al.
patent: 4082984 (1978-04-01), Iwata
patent: 4404497 (1983-09-01), Takematsu
Mon Donald D.
Moore David K.
O'Reilly David
Sato Koki Company Ltd.
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