Floating battery feed circuit for telephone subscriber line inte

Details Floating battery feed circuit for telephone subscriber line inte Floating battery feed circuit for telephone subscriber line inte

1982-09-30

1984-01-31

Schreyer, Stafford D.

Electric power conversion systems

Phase conversion without intermediate conversion to d.c.

By dynamoelectric machine converter

179 18FA, 363 20, H04M 1900

Patent

active

044291868

ABSTRACT:
An arrangement for providing a subscriber line with an operating potential. The energy to the line is transferred thereto inductively at a fixed frequency and includes the rectification means on the subscriber side of the inductor. The amount of energy transferred to the line is controlled by pulse width. The control pulse width circuit includes means to decrease the energy transfer above a level at which a subscriber station internal regulation would be defeated.

REFERENCES:
patent: 4056691 (1977-11-01), Freimanis et al.
M. Seliger, V. Kreft; "Pulse Width Controlled DC/DC Converter as DC Supply for Electronic Telephone Exchanges", Elektrotehniski Vestnik, vol. 43, No. 2, pp. 27-31, Apr. 1976.

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