NASA NTRS · 19790015174
Voltage regulator for battery power source
Abstract
A bipolar transistor in series with the battery as the control element also in series with a zener diode and a resistor is used to maintain a predetermined voltage until the battery voltage decays to very nearly the predetermined voltage. A field effect transistor between the base of the bipolar transistor and a junction between the zener diode and resistor regulates base current of the bipolar transistor, thereby regulating the conductivity of the bipolar transistor for control of the output voltage.
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Black, J. M.. 1979-04-24. Voltage regulator for battery power source. https://ntrs.nasa.gov/citations/19790015174
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