Polarity insensitive electronic flash driver circuit

Details Polarity insensitive electronic flash driver circuit Polarity insensitive electronic flash driver circuit

1988-01-25

1989-02-14

Hix, E. T.

354413, G03B 1503

Patent

active

048049859

ABSTRACT:
A polarity insensitive flash driver circuit for use in a photographic system including a camera for generating a flash trigger signal, and an electronic flash unit having a trigger circuit actuatable responsive to the flash trigger signal to initiate a flash illumination. This flash driver circuit includes a two conductor, polarity insensitive connector for connection to the flash driver circuit. A first gate controlled rectifier is connected between the two conductors for controllably conducting a current in a first polarity. A second gate controlled rectifier is connected between the two conductors for controllably conducting a current in a second polarity. Actuating means responsive to the flash trigger signal simultaneously actuate the first and second gate controlled rectifiers to conduct a current.

REFERENCES:
patent: 3134048 (1964-05-01), Wolfframm et al.
patent: 3524102 (1970-04-01), Michalski et al.
patent: 3657598 (1972-04-01), Nomura et al.
patent: 4095245 (1978-06-01), Kuraishi
patent: 4130767 (1978-12-01), Okuhara

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