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A Dual Reference

IP.com Disclosure Number: IPCOM000091268D
Original Publication Date: 1967-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Rooney, JJ: AUTHOR

Abstract

This circuit for regulating and distributing DC power to integrated circuits utilizes a plurality of small regulators associated with each card. Two separate reference sources of voltages are provided for the regulators.

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A Dual Reference

This circuit for regulating and distributing DC power to integrated circuits utilizes a plurality of small regulators associated with each card. Two separate reference sources of voltages are provided for the regulators.

The input voltage or supply V Bulk is the output voltage of a ferroresonant regulator that has an additional winding to supply the bias voltage V Bias. The regulator portion of the reference circuit utilizes zener diodes Z1 and Z2 in series with a regulating transistor T1, and a zener reference Z3. A ground connection between potentiometers R1 and R2 establishes two separate source references. These are individually adjustable for the particular circuit requirement with which a regulator is associated.

Regulator T2 regulates by varying current in its series resistor R3 to vary the voltage for its load L1. Differential amplifier A1 compares reference voltage at R1 with the load voltage across L1. Similar regulating and comparing occurs at the other amplifiers A2...A4 when supplying load circuits L2...L6. Due to excessive power dissipation in the series resistors R3...R6, the latter are mounted separate from the card containing the other components since the voltage is sensed at the individual card.

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