Constant-voltage circuit with a diode and MOS transistors operat

Details Constant-voltage circuit with a diode and MOS transistors operat Constant-voltage circuit with a diode and MOS transistors operat

1977-12-23

1980-08-12

Hickey, Robert J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

307304, 323 22R, 340636, H02J 710, H03K 326

Patent

active

042175356

ABSTRACT:
A constant-voltage circuit in which a diode and an MOS transistor are connected in series between power supply terminals between which a battery power source is connected. The MOS transistor is biased to operate in the saturation region. The forward voltage drop across the diode is kept substantially constant independent of variations in battery voltage and temperature. This constant-voltage circuit may preferably be used in a battery checker circuit for detecting the end of battery life.

REFERENCES:
patent: 3743923 (1973-07-01), Steudel
patent: 3832644 (1974-08-01), Nagata et al.
patent: 3932797 (1976-01-01), York
patent: 4119904 (1978-10-01), Haglund

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