Power supply circuit for camera
US4126874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1976 |
| Grant date | Nov 21, 1978 |
| Priority date | — |
| Expiry date | Dec 20, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B43/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A power supply circuit for a camera wherein a detection circuit which detects the voltage of a power source is provided for supplying an electric power to the electric circuit of the camera only when the detected voltage is above a preset value.In the power supply circuit, the power supply is controlled by a detection output obtained after a voltage detecting action is performed in a stable condition by the detection circuit. The power source voltage is detected in a manner suitable for the characteristic of the battery employed. Further, the voltage detection is performed only momentarily to prevent unnecessary power consumption for voltage detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.