Automatic exposure control devices using bi-directional transistors
In an exposure control device, a bi-directional bi-polar transistor is connected between a light measuring circuit and a storage capacitor for connecting and disconnecting the storage capacitor from the light measuring circuit. A biasing circuit provides the bias potential to control the bi-directio...
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| Zusammenfassung: | In an exposure control device, a bi-directional bi-polar transistor is connected between a light measuring circuit and a storage capacitor for connecting and disconnecting the storage capacitor from the light measuring circuit. A biasing circuit provides the bias potential to control the bi-directional bi-polar transistor either through a mechanical switch or a semiconductor. |
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