Browse Prior Art Database

Delay Line Shift Register

IP.com Disclosure Number: IPCOM000095741D
Original Publication Date: 1964-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Mohn, WS: AUTHOR [+2]

Abstract

This register is of the recirculating delay line storage or memory loop type. It functions as a shift register on the insertion of new data in the first position, the forward shifting of the existing data in the line and the removal of old data.

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 60% of the total text.

Page 1 of 2

Delay Line Shift Register

This register is of the recirculating delay line storage or memory loop type. It functions as a shift register on the insertion of new data in the first position, the forward shifting of the existing data in the line and the removal of old data.

The register has a delay line having a length of n-1 bit times.

The output of the delay line is connected to drive a one-bit time window trigger through the switch A. This trigger drives the input of the delay line. The input of the delay line is clocked by an independent oscillator having a frequency of f. A counter having a length of n bit times is also driven by the oscillator.

In the neutral or non-shifting mode of operation, data in the form of logical 1's or 0's which have been previously stored in the shift register, rotates around the storage loop such that the data is stationary with respect to the delay line clock. During any one-bit time, the bit in the window trigger is identified by the count in the counter. To enter new data into the register, an expand trigger is positioned before the window trigger and connected through the switch A to the window trigger. The expand trigger also has a time duration equal to one-bit time.

In the shifting operation, a new data bit is entered in the expand trigger of the register. The data stored in this trigger, by the feedback connection from the output of the delay line, is moved to the window trigger, and the data in the window trigger is moved t...