Circuitry for controlling shutter time in accordance with a manu

Details Circuitry for controlling shutter time in accordance with a manu Circuitry for controlling shutter time in accordance with a manu

1974-09-06

1976-07-20

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

354235, H03K 513, G03B 908

Patent

active

039708748

ABSTRACT:
An output stage transistor of a control circuit provides a manually adjustable amount of charging current to a timing capacitor. The control circuit is arranged so that the charging current changes by a factor of two for each resistance change by a factor of the square root of two in a manually variable resistor.

REFERENCES:
patent: 3231761 (1966-01-01), Keller et al.
patent: 3365586 (1968-01-01), Billings
patent: 3808463 (1974-04-01), Mulder
patent: 3810203 (1974-05-01), Mori et al.

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