Abstract: A signal receiving circuit of a satellite receiver is disclosed. The satellite receiver comprises at least a first antenna and the signal receiving circuit is adapted to be electrically connected with a digital signal converting device. The signal receiving circuit comprises an amplifier module and a signal processing and power supply unit. The amplifier module is electrically connected with at least a first antenna to receive an antenna signal. The signal processing and power supply unit is electrically connected with the amplifier module to down convert the antenna signal and transmit the antenna signal to the digital signal converting device. The signal processing and power supply unit comprises a charge pump, which receives the output signal of the digital signal converting device and provides at least a driving power for the signal receiving circuit.