Title :
A switching regulator and lightning protector for a subscriber line interface circuit
Author :
Chen, Robert K. ; Lerch, Thomas H. ; Spires, D. Alan
fDate :
12/1/1986 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1986.1052634
