Monolithic crosspoint arrays for private automatic branch exchanges (PABX)

Author

Bächle, Erich ; Dangel, JÜrgen ; HÖppner, Dietrich ; Kohlbacher, Gerhard R. ; SchlÜter, Klaus ; SchÜssler, Hans H.

Volume

12

Issue

4

fYear

1977

fDate

8/1/1977 12:00:00 AM

Firstpage

407

Lastpage

415

Abstract

This paper presents economical technical solutions for monolithic integrated semiconductor crosspoint arrays for PABXs. It starts with the description of IGFET switches and I/SUP 2/L-bipolar transistor switches. Then, realised symmetrical crosspoint arrays with these switches are treated, beginning with the integration level and the logic concept. Monolithic integrated crosspoint arrays with 5×2 balanced crosspoints in PMOS technology, NMOS Si-gate technology, and I/SUP 2/L technology are described in detail. Measurements for PMOS and I/SUP 2/L arrays show that for a one-stage PABX all transmission requirements at least are fulfilled. With an I/SUP 2/L-bipolar transistor array even switching networks with three stages are possible, since ON-resistances of these switches are especially low.

Keywords

Automatic telephone systems; Bipolar integrated circuits; Electronic switching systems; Field effect integrated circuits; Private telephone exchanges; automatic telephone systems; bipolar integrated circuits; electronic switching systems; field effect integrated circuits; private telephone exchanges; Attenuation; Breakdown voltage; Crosstalk; Logic arrays; Power generation economics; Space technology; Switches; Switching circuits; Telephony; Thyristors;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.1977.1050922

Filename

1050922