H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/63
H04M 19/00 (2006.01)
Patent
CA 1109171
ABSTRACT: Supply arrangement for a line circuit com- prising a high frequency pulse source provided with switching means, the switching means being controlled for controlling the park-space ratio of the high frequency pulse source. This achieves that in a simple manner, namely by the choice of the mark-space ratio, d.c. volt- ages of any desired level as well as a.c. voltages can be supplied to the subscriber's line.
305985
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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