Means for checking battery voltage level

Details Means for checking battery voltage level Means for checking battery voltage level

1980-01-25

1982-03-02

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

324133, 324433, 340661, 340664, G08B 2100

Patent

active

043180922

ABSTRACT:
Means for checking the voltage level of a battery used in an apparatus including an operational amplifier powered from the battery and an indicating means operatively connected to the output of the operational amplifier. The indicating means provides a replace battery indication which is presented when the battery is in a replacement condition and the amplifier is operated at saturation.

REFERENCES:
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patent: 3535593 (1970-10-01), Schweitzer, Jr.
patent: 3600678 (1969-09-01), Garrett et al.
patent: 3787885 (1974-01-01), Johnson
patent: 3806803 (1974-04-01), Hall
patent: 3851528 (1974-12-01), Nichols et al.
patent: 3921064 (1975-11-01), Mori et al.
patent: 3925771 (1975-12-01), Satake
patent: 3942009 (1976-03-01), Taylor
patent: 3997831 (1976-12-01), Hopfner
patent: 4020243 (1977-04-01), Oldford
Publ. "RCA Integrated Circuits", RCA Data Book, pp. 195-199, (CA3078, CA3078A Amplifiers) C, 1926.

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