Browse Prior Art Database

D. D. Duplexor

IP.com Disclosure Number: IPCOM000097185D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Isberg, CA: AUTHOR [+2]

Abstract

The transmitter-receiver permits simultaneous transmission and reception of direct current binary data to and from transmission line 11. Transmitter 12 supplies binary data signals through a terminal T1 to parallel paths. These include resistor R and transmission line 11 in one path and resistor R1 and line matching filter 13 in the other path.

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D. D. Duplexor

The transmitter-receiver permits simultaneous transmission and reception of direct current binary data to and from transmission line 11. Transmitter 12 supplies binary data signals through a terminal T1 to parallel paths. These include resistor R and transmission line 11 in one path and resistor R1 and line matching filter 13 in the other path.

Incoming signals from line 11 flow into terminal T2. A receiving detector 14 is connected to terminal T2 and a terminal T3 located between R1 and line matching filter 13. Assuming the resistances of R and R1 are equal, current from transmitter 12 flowing into T1 divides equally. Such is between R and line 11 on the one hand and resistor R1 and filter 13 on the other hand.

This produces equal IR drops across resistors R, R1 to produce a net voltage of zero across terminals T2, T3 and the receiver detector input. Incoming currents from line 11 flow through resistors R and R1 to produce a cumulative IR drop across terminals T2 and T3 to provide an input voltage to detector 14.

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