Analog-to-digital converter for camera

Details Analog-to-digital converter for camera Analog-to-digital converter for camera

1986-12-09

1987-10-27

Perkey, W. B.

354441, C03B 7091

Patent

active

047025859

ABSTRACT:
There is disclosed an analog-to-digital converter for a camera which is arranged to convert an analog signal of an exposure information, particularly a photometric output of a light measuring circuit into a corresponding digital signal. The analog-to-digital converter according to the present invention includes means for dividing a photometric output signal of a light measuring circuit, which is fed into an analog-to-digital converting circuit, into predetermined areas, means for level-shifting the respective ones of the divided areas of said photometric output signal, and means for feeding the level-shifted photometric output in the respective areas, separately, into the analog-to-digital converter circuit, whereby digital values are obtained, separately, in connection with the respective ones of the divided areas of the photometric output signal.

REFERENCES:
patent: 4363540 (1982-12-01), Takishima et al.
patent: 4370037 (1983-01-01), Uchidoi et al.
patent: 4401373 (1983-08-01), Nakai
patent: 4453811 (1984-06-01), Yamasaki

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