Browse Prior Art Database

Distributed Plate Drive for Plate Push One-Dimensional Random-Access Memories

IP.com Disclosure Number: IPCOM000043480D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Kalter, HL: AUTHOR [+2]

Abstract

In most dynamic memories the wordline transition time is a significant component of access time. For designs using the Plate Push Storage technique, the decoded storage plate also starts a transition about the same time that the wordline does. In such architectures the wordline time constant may be significantly smaller than the associated storage plate time constant (due to metal strapping, silicides, etc.). When this is the case, the storage plate transition will be the gating function prior to the Sense sequence. This access path delay can be significantly reduced by using Distributed Drive. Distributed Drive locates driver circuits at any number of points along the wordline/storage plate pair to automatically decode the proper storage plate and initiate the storage plate transition.

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 98% of the total text.

Page 1 of 2

Distributed Plate Drive for Plate Push One-Dimensional Random-Access Memories

In most dynamic memories the wordline transition time is a significant component of access time. For designs using the Plate Push Storage technique, the decoded storage plate also starts a transition about the same time that the wordline does. In such architectures the wordline time constant may be significantly smaller than the associated storage plate time constant (due to metal strapping, silicides, etc.). When this is the case, the storage plate transition will be the gating function prior to the Sense sequence. This access path delay can be significantly reduced by using Distributed Drive. Distributed Drive locates driver circuits at any number of points along the wordline/storage plate pair to automatically decode the proper storage plate and initiate the storage plate transition. As driver circuits are added, the storage plate transition time can approach the wordline transition time, reducing the access time and the storage plate transition sensitivity to the storage plate time constant. The figure illustrates an example of three driver circuits distributed along a wordline 11 and storage plate 12 at the ends and center. As the rising wordline voltage exceeds a threshold, the storage plate begins to discharge to ground starting at driver 13 and propagating to drivers 14 and 15 as the wordline transition propagates down the wordline.

1

Page 2 of 2

2

[This page contains 2 pictures...