Voltage regulator circuit
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United States of America Patent
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-
Sep 15, 1981
Grant Date -
N/A
app pub date -
Feb 4, 1980
filing date -
Feb 4, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A voltage regulator circuit of the type including a transistor having a base, an emitter representing a voltage output terminal and a collector representing a voltage input terminal, and a zener diode connected in series with the base to represent a common input-output terminal, wherein voltage regulation is achieved by the constant reverse bias voltage drop of the zener diode in combination with the constant forward bias voltage drop of the emitter-base junction of the transistor, the improvement including a second transistor having an emitter representing a second voltage output terminal with respect to the common input-output terminal, and the second transistor further having a base connected to the emitter of the first transistor, wherein voltage regulation is provided for the second output terminal with respect to the common input-output terminal by the combination of the voltage regulation provided at the first output terminal and the constant forward bias voltage drop of the emitter-base junction of the second transistor.
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