NDLI: P-N-P-N Interface-to-Interface Switching for Telephony and Broad-Band Communication

Content Provider	IEEE Xplore Digital Library
Author	Aagaard, E. Coenders, J. Dijkmans, E.
Copyright Year	1972
Abstract	To be economically attractive, all-electronic spacedivision multiplex (SDM) networks must have a minimum of wiring and interconnection joints, take maximum advantage of IC-type matrix modules, offer inexpensive control (including checking, fault location and traffic supervision) and still satisfy transmission requirements. A means to meet all these demands is presented. It is based on a special p-n-p-n triode crosspoint featuring negligible crosstalk and signal current losses and a very low level of switching noise. Spurious triggering (rate effect) can be eliminated without any special requirements regarding the slope of any signal or the properties of the p-n-p-n device. When such crosspoints are used in unbalanced networks with single-wire through-switching and common return, the added application of the "high-low" principle ensures effective suppression of wiring crosstalk and noise pickup. The resultant signal transfer properties depend practically solely on the interfaces of the network as if these interfaces were directly interconnected. Wiring is minimized by suitable integration of control circuitry into the matrix module and by using the transmission wiring additionally for control without disturbing transmission paths in use. IC modules withn \times mcrosspoints can be made with onlyn + m + 1terminals for transmission and control in addition to supply terminals.
Starting Page	1250
Ending Page	1263
Page Count	14
File Size	1554646
File Format	PDF
ISSN	00906778
Volume Number	22
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1974-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Communication switching Telephony Broadband communication Wiring Crosstalk Integrated circuit interconnections Communication system traffic control Fault location Noise level Circuit noise
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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