Patent ID: 7103331

Claim:
A low noise block down converter comprising: a signal reception unit receiving a broadcast signal transmitted from a first satellite to output a first RF signal; a local oscillator circuit receiving a supply of power supply current from a high potential node to discharge said power supply current from a low potential node; a frequency converter converting said first RF signal into a first IF signal of an intermediate frequency band using an output signal of said local oscillator circuit; an output port for outputting said first IF signal; and a power supply circuit supplying power to said local oscillator circuit and said first signal reception unit, wherein said power supply circuit includes a first voltage regulator receiving a power supply via said output port to perform a voltage adjustment and applying a first DC voltage to said high potential node of said local oscillator circuit, and a second voltage regulator receiving a potential at said low potential node of said local oscillator circuit to perform a voltage adjustment and applying a second DC voltage to said signal reception unit.