Apparatus for controlling modulation of an alternating...

Details Apparatus for controlling modulation of an alternating... Apparatus for controlling modulation of an alternating...

2006-06-27

2006-06-27

Nguyen, Khanh V. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

C330S127000

Reexamination Certificate

active

07068109

ABSTRACT:
An apparatus for controlling modulation of an alternating waveform on a direct current (DC) voltage signal within a low-noise block (LNB) controller is disclosed. The apparatus includes a DC power supply and a mixing/switching circuit. The DC power supply provides a steady DC voltage to a load, such as an LNB amplifier. The mixing/switching circuit adds a modulating signal to the DC voltage and selectively allows the modulated DC voltage to the load. The mixing/switching circuit includes a common control signal input for managing both of the above-mentioned two functions.

REFERENCES:
patent: 5396194 (1995-03-01), Williamson et al.
patent: 5450037 (1995-09-01), Kanaya et al.
patent: 5559467 (1996-09-01), Smedley
patent: 6369651 (2002-04-01), Dent
patent: 6734724 (2004-05-01), Schell et al.

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