Accession Number:

AD0274054

Title:

IMPROVED PHASE MODULATOR-DEMODULATOR

Descriptive Note:

Corporate Author:

INTERNATIONAL BUSINESS MACHINES CORP ROCKVILLE MD

Personal Author(s):

Report Date:

1961-11-30

Pagination or Media Count:

38.0

Abstract:

Effort was continued towards the design of a modulator-demodulator. The logic, circuit, and mechanical designs of the units are covered in detail. The problem of obtaining a good method of generating and detecting a syne bit resulted in a considerable amount of logic and circuit redesign. It is felt that this method, which uses a phase shift in the center of a bit, is the best and simplest method to use in a unit of this small physical size. Additional design work was done on some of the circuits. The basic circuits to be used are still in doubt.

Subject Categories:

  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE