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Pulse Train Generator

IP.com Disclosure Number: IPCOM000098603D
Original Publication Date: 1959-Jun-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Francisco, SG: AUTHOR

Abstract

On many occasions in digital systems, it is desired to take words of binary information and convert each to a pulse train having a number of pulses equal to the scaled equivalent of each binary word. It is also desirable that these pulses be approximately evenly distributed to minimize non-linearity or noise in the output representation.

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Pulse Train Generator

On many occasions in digital systems, it is desired to take words of binary information and convert each to a pulse train having a number of pulses equal to the scaled equivalent of each binary word. It is also desirable that these pulses be approximately evenly distributed to minimize non-linearity or noise in the output representation.

The drawing shows apparatus having a multiplexing potential. Serial binary information consisting of four words, with each word having three orders of binary significance, is read from a single track on a drum over a time period equal to one drum revolution. This serial information is applied to one input of a 2/0/ AND circuit, a 2/1/ AND circuit and a 2/2/ AND circuit. An interrogating pulse source is utilized to derive pulses on three conductors with each conductor corresponding to one of

the orders of significance in a word of binary information. This pulse source acts in response to the drum revolution counter output of a timing gate generator to derive in each of its three output conductors interrogating pulses, which are equally spaced, having a pulse width equal to one drum revolution and a repetition rate determined by the order of significance on each conductor.

The interrogating pulses on one of these conductors are mutually exclusive of the interrogating pulses on either of the other two conductors. The output conductor of the interrogating source having the lowest repetition rate serves as an input to the 2/0/ AND circuit, the output conductor having the next higher repetition rate serves as an input to the 2/1/ AND circuit and the output conduc...