Browse Prior Art Database

Cross Talk Elimination

IP.com Disclosure Number: IPCOM000095325D
Original Publication Date: 1965-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Lemiere, J: AUTHOR

Abstract

On a telephone line between a computer C and an input/output device I/O it can be necessary to use vocal signals. In such case, cross-talk effects must be eliminated.

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Cross Talk Elimination

On a telephone line between a computer C and an input/output device I/O it can be necessary to use vocal signals. In such case, cross-talk effects must be eliminated.

Drawing 1 shows a modem arrangement. Emission or answer back signals are sent to the checking device. The signals are amplified by amplifier A and activate Schmidtt trigger T shown in 2. Trigger T produces a pulse signal each time the value of the input waveform signal gets over a threshold value, i.e., 60 db. Then, these pulse signals activate loudspeaker LS.

The cross-talk signals, whose values fail below the threshold value, are eliminated. If these values are above the threshold, trigger T produces a distortion such that the signal has no effect on loud-speaker LS.

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