Electricity: power supply or regulation systems – Remote sensing
Patent
1978-01-03
1980-04-01
Konick, Bernard
Electricity: power supply or regulation systems
Remote sensing
323 21, 363 26, 363 56, H04B 344
Patent
active
041963202
ABSTRACT:
An essentially non-dissipative, strap-free, continuously adjustable power unit inherently impervious to shorts and open circuits for powering repeaters in a T1 or similar telephone span line is disclosed. The unit uses a pulse-width modulated inverter in the converter input circuit to produce a variable-voltage D.C. output to the span line. The pulse width or duty cycle of the inverter is controlled by a control logic which senses the span line current and maintains it at a selectable predetermined level without any apreciable power dissipation.
REFERENCES:
patent: 3701937 (1972-10-01), Combs
patent: 3818307 (1974-06-01), Hamilton et al.
patent: 3839668 (1974-10-01), Black
patent: 3859586 (1975-01-01), Wadlington
patent: 3916282 (1975-10-01), Rothermel
patent: 4032830 (1977-06-01), Buonavita
patent: 4058758 (1977-11-01), Peterson
B. Hamilton and S. Mottel; "L5 System: Line-Power Feed;" Bell System Technical Journal; vol. 53, No. 10; Dec. 1974; pp. 1987-2009.
N. Suzuki, H. Tanaka, T. Sugiura; "PCM-400 M Power-Feed Equipment;" Review of the Electrical Communication Laboratories; vol. 24, No. 9-10; Sep.-Oct. 1976; pp. 737-745.
W. Sahm; "General Electric Optoelectronics Manual;" 1976; pp. 70-72.
Konick Bernard
Lynch Communication Systems, Inc.
Myers Randall P.
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