Apparatus and method of controlling low frequency load...

Details Apparatus and method of controlling low frequency load... Apparatus and method of controlling low frequency load...

2005-12-27

2005-12-27

Le, Danh Cong (Department: 2683)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S307000, C455S127100, C363S098000, C363S132000, C323S281000, C323S275000

Reexamination Certificate

active

06980783

ABSTRACT:
A circuit controls the low frequency load currents drawn by components of telecommunications systems. The circuit includes a power converter, a first sense circuit, a second sense circuit, a comparator, and a power converter control circuit. The power converter control circuit controls the power converter's duty cycle in accordance with the input signal compared to a reference. In this manner, the low frequency load currents may be easily and economically controlled.

REFERENCES:
patent: 3571697 (1971-03-01), Phillips
patent: 4940929 (1990-07-01), Williams
patent: 5602465 (1997-02-01), Clemente
patent: 5625539 (1997-04-01), Nakata et al.
patent: 5892674 (1999-04-01), Shimada et al.
patent: 6282111 (2001-08-01), Illingworth
patent: 6377478 (2002-04-01), Morishita
patent: 6661210 (2003-12-01), Kimball et al.

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