Title :
Monolithic crosspoint arrays for private automatic branch exchanges (PABX)
Author :
Bächle, Erich ; Dangel, JÜrgen ; HÖppner, Dietrich ; Kohlbacher, Gerhard R. ; SchlÜter, Klaus ; SchÜssler, Hans H.
fDate :
8/1/1977 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1977.1050922
