Low noise block supply and control voltage regulator

Details Low noise block supply and control voltage regulator Low noise block supply and control voltage regulator

2007-04-17

2007-04-17

Kelley, Chris (Department: 2623)

Interactive video distribution systems

Satellite video distribution system

Receiver

C725S069000, C725S068000, C455S003020, C323S282000, C323S289000, C323S290000

Reexamination Certificate

active

09441119

ABSTRACT:
A low power circuit for providing power and control signals to a low noise block converter of a satellite receiver over a single coaxial cable includes a tracking switch-mode power supply. The power and control signals have a DC voltage level selected from a plurality of DC voltage levels and are modulated by an analog AC tone signal. The switch-mode power supply provides a regulated output voltage which tracks the selected DC voltage level. The regulated output voltage provides the input voltage to an adjustable linear amplifier which generates an output voltage having the selected DC voltage level modulated by the analog AC tone signal.

REFERENCES:
patent: 5345591 (1994-09-01), Tsurumaki et al.
patent: 5422562 (1995-06-01), Mammano et al.
patent: 5893023 (1999-04-01), Vizer
“8284: Two Output LNB Supply and Control Voltage Regulator” Data sheet of Allegro MicroSystems, Inc., pp. 1-6, Jun. 16, 1999.
LNBP 10 Series LNBP20: LNB Supply and Control Voltage Regulator (Parallel Interface) Data sheet of ST, pp. 1-17, Sep. 1998.
“8284: LNB Supply and Control Voltage Regulator” Datasheet of Allegro MicroSystems, Inc., pp. 1-6, Dec. 7, 1998.
“LNBP22: LNB Supply and Control IC With Step-Up Converter AndI2C Interface” Data sheet of ST, pp. 1-10, V.3.2—Dec. 1998.

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