Browse Prior Art Database

INTEGRATED +4.2 VOLT REGULATED POWER SUPPLY for VLSI LOGIC MASTERSLICE

IP.com Disclosure Number: IPCOM000035348D
Original Publication Date: 1989-Jul-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Mullgrav, AL: AUTHOR

Abstract

The circuit described in this article is made an integral part of a very large-scale integrated (VLSI) logic masterslice. One power supply circuit per chip is used to provide regulated base drive via a regulated voltage line (RVL) to the voltage distribution transistor (VDT) incorporated in each cell I/O cell.

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 86% of the total text.

Page 1 of 2

INTEGRATED +4.2 VOLT REGULATED POWER SUPPLY for VLSI LOGIC MASTERSLICE

The circuit described in this article is made an integral part of a very large- scale integrated (VLSI) logic masterslice. One power supply circuit per chip is used to provide regulated base drive via a regulated voltage line (RVL) to the voltage distribution transistor (VDT) incorporated in each cell I/O cell.

When the collector of the voltage distribution transistor (VDT) is connected to a +5-volt supply source (Vcc), as shown in Fig. 1, and the base of that transistor maintained at +4.2 volts by the RVL, the VDT emitter will send a regulated +3.4 volts (Vreg) to the cell. A new RVL circuit capable of maintaining the regulated base drive required by the VDT is next shown in Fig. 2. The output voltage (RVL) is here regulated by controlling the voltage drop across the resistors R1 and R2. Transistors T1 and T2 compare the voltage sensed at node 1 by resistors R3 and R4 to the reference voltage provided at node 2 by the diode T3. Any increase in RVL will act to increase the voltage at node 1, while node 2 remains constant. As a result, T1 and T2 are further turned ON, drawing more collector current through R1 and R2, thereby tending to restore the voltage at RVL to its original value. Transistors (diode connected) T4 and T5 are included in the circuit to provide INTEGRATED +4.2 VOLT REGULATED POWER SUPPLY FOR VLSI LOGIC MASTERSLICE - Continued for temperature compensation. Changes in the base-e...