Static immunity for single touch flash charger control

Details Static immunity for single touch flash charger control Static immunity for single touch flash charger control

1995-12-21

1997-05-27

Perkey, W. B.

Photography

With object illumination for exposure

With power supply detail

315241P, G03B 1505, H05B 3700

Patent

active

056341539

ABSTRACT:
An electronic flash device includes an illumination element, an actuation circuit having a flash capacitor providing energy releasable to illuminate the element, and a self-oscillating charging circuit, having a transistor, for charging the capacitor. The invention is characterized by a resistor located between a base of the transistor and ground for preventing the self-oscillating circuit from charging the capacitor when the flash device is exposed to an external static electric charge.

REFERENCES:
patent: 3310723 (1967-03-01), Schmidt et al.
patent: 3651372 (1972-03-01), Uchida et al.
patent: 3764849 (1973-10-01), Ohta
patent: 3882358 (1975-05-01), Deskevich et al.
patent: 4001640 (1977-01-01), Biber
patent: 4007469 (1977-02-01), Land et al.
patent: 4065700 (1977-12-01), Liebman
patent: 4067028 (1978-01-01), Lermann et al.
patent: 4082983 (1978-04-01), Adams, Jr.
patent: 4084167 (1978-04-01), Iwata
patent: 4130780 (1978-12-01), Ban et al.
patent: 4163178 (1979-07-01), Hosono
patent: 4259615 (1981-03-01), Kashihara et al.
patent: 4271375 (1981-06-01), Hosono
patent: 4322143 (1982-03-01), Mailander
patent: 4323822 (1982-04-01), Yakematsu
patent: 4348087 (1982-09-01), Ellin et al.
patent: 4511233 (1985-04-01), Kazami et al.
patent: 4540265 (1985-09-01), Harvey
patent: 4628229 (1986-12-01), Inoue
patent: 4777507 (1988-10-01), Dunsmore et al.
patent: 4912499 (1990-03-01), Desormeaux
patent: 4989029 (1991-01-01), Inoue et al.
patent: 4994846 (1991-02-01), Kobayashi et al.
patent: 5138362 (1992-08-01), Kobayashi et al.
patent: 5249007 (1993-09-01), Tanaka
patent: 5315332 (1994-05-01), Hirasaki et al.
patent: 5337099 (1994-08-01), Tasaka et al.

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