Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Stabilized Reference Voltage Source

IP.com Disclosure Number: IPCOM000073914D
Original Publication Date: 1971-Feb-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Ogawa, S: AUTHOR [+3]

Abstract

This circuit provides an extremely stable output voltage Vout for wide variations in output current IL over line 24. This increased capability is obtained by the addition of differential amplifier 10 comprising transistors 12 and 14, commonly connected at their emitters to a current source 11. The base of transistor 12 is biased by transistor 9 and resistor 11.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Stabilized Reference Voltage Source

This circuit provides an extremely stable output voltage Vout for wide variations in output current IL over line 24. This increased capability is obtained by the addition of differential amplifier 10 comprising transistors 12 and 14, commonly connected at their emitters to a current source 11. The base of transistor 12 is biased by transistor 9 and resistor 11.

Normally, increasing IL will increase IB so as to cause Vout to become more negative. A partial compensation occurs due to action of differential amplifier 16, as well as from differential amplifier 10. Amplifier 16 comprises a pair of transistors 13 and 17, commonly connected at their emitters to a current source 12. Operationally, when the output current IL is at approximately 0, the bases of transistors 12 and 14 are at approximately the same potential. As IL increases, the increased base to emitter voltage drops, VBE's of transistors 18, 20 and 22 are sensed differentially and the base of transistor 14 becomes more negative than the base of transistor 12, thus causing the collector current, IC, of transistor 14 to decrease.

This decrease in the collector current, IC, will compensate for the increased IB. This action results in little change in Vout as IL is increased from 0 to the maximum value of IL.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]