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Voltage Regulator

IP.com Disclosure Number: IPCOM000096090D
Original Publication Date: 1964-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

McCullough, JW: AUTHOR [+2]

Abstract

The 10 v. supply is established by a regulated source such as a zener diode. The 6 v. supply can be an unregulated source. As the output voltage tends to decrease, T2 is given more heavily into conduction. This draws more base current at T1 and causes it to supply more current to the output, thus restoring the output voltage.

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Voltage Regulator

The 10 v. supply is established by a regulated source such as a zener diode. The 6 v. supply can be an unregulated source. As the output voltage tends to decrease, T2 is given more heavily into conduction. This draws more base current at T1 and causes it to supply more current to the output, thus restoring the output voltage.

Conversely, if the output voltage tends to increase, T2 increases the base current at T1 which reduces the output current and tends to bring the output voltage back down. Diode D provides temperature compensation for the base- emitter junction of T2. Capacitor C further enhances the stability of the output voltage. The potentiometer provides adjustment of the output voltage.

When the resistances are set at the following values, stable output voltages ranging from 1.5 to 2.6 volts, depending upon the potentiometer setting, are obtained with an allowable load current fluctuation from 50 ma to 400 ma: R1 1.20K

R2 .33K

R3 .50K

R4 .22K

R5 68 ohms

R6 6 ohms.

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