Browse Prior Art Database

MOSFET Storage Array Addressing System

IP.com Disclosure Number: IPCOM000073717D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Hsieh, JC: AUTHOR [+2]

Abstract

This MOSFET decoder's output is dependent on the chip select pulse CS used in the selection or operation of the chip on which it is formed.

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 68% of the total text.

Page 1 of 2

MOSFET Storage Array Addressing System

This MOSFET decoder's output is dependent on the chip select pulse CS used in the selection or operation of the chip on which it is formed.

In order to reduce standby power dissipation in monolithic memories as much as possible, timing pulses such as chip select pulses are used to turn monolithic chips on when they are used and off while they are not being used. The problems with these timing pulses are that they necessitate additional support circuitry to generate them and additional input/output pins to bring them onto the chip. Shown is a decoder and support circuit combination that eliminates the need for one of these pulses by generating a needed pulse from the chip select pulse without any standby power.

While the chip is not being selected, or in other words, it is being supplied with the not chip select pulse CS charge passes through load device Q1 and on device Q2 to charge the source to gate capacitor C1 of device Q3. If the decoder is later selected, devices Q4 to Q7 will remain off leaving capacitor C1 charged so that device Q3 remains turned on. However, if the decoder is not selected, one of devices Q4 through Q7 will conduct discharging capacitor C1 through device Q8 and rendering device Q3 nonconductive. The same time as the application of the decoder pulse, the chip select pulse CS is applied. The chip select pulse CS charges capacitor C2 through device Q9 turning device Q10 on thereby allowing current to pa...