DocumentCode
901392
Title
A switching regulator and lightning protector for a subscriber line interface circuit
Author
Chen, Robert K. ; Lerch, Thomas H. ; Spires, D. Alan
Volume
21
Issue
6
fYear
1986
fDate
12/1/1986 12:00:00 AM
Firstpage
947
Lastpage
955
Abstract
Two monolithic ICs, a switching regulator and a crowbar protector circuit fabricated in a 90-V complementary bipolar technology are described. These devices enhance the performance of a basic subscriber-line interface circuit (SLIC) by extending the range to the customer so that 20-mA DC feed current can be supplied to a 2800-Ω loop without the need for a -72-V office battery. The power dissipation of the entire SLIC subsystem is at most 1.5 W for any length of subscriber loop. All circuitry is robustly protected from foreign 60-Hz and lightning voltages.
Keywords
Bipolar integrated circuits; Lightning protection; Linear integrated circuits; Subscriber loops; Telephone equipment; Voltage regulators; bipolar integrated circuits; lightning protection; linear integrated circuits; subscriber loops; telephone equipment; voltage regulators; Batteries; Current supplies; Feeds; Lightning; Power dissipation; Protection; Regulators; Robustness; Subscriber loops; Switching circuits;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.1986.1052634
Filename
1052634
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