Patent ID: 6472958
Filing Date: 2002-10-29
Classification: H03H

Abstract:
An input circuit of a satellite tuner comprising:an antenna terminal for connecting to an outside converter via a cable; a high pass filter for extracting a high frequency signal component from the outside converter transmitted via the cable and for transmitting the extracted high frequency signal to an initial stage circuit; a power source supply line for connection to a power source for providing power for the outside converter via the cable: a choke coil connected between the power source supply line and the antenna terminal for blocking the high frequency signal component from the outside converter transmitted via the cable and transmitting the power from the power source supply line to the antenna terminal; a first capacitor connected between the power source supply line and ground for removing influence of a noise component included in the power transmitted by the power source supply line; and a second capacitor connected between the power source supply line and ground for removing influence of the high frequency signal component which leaks in via the choke coil, wherein a self-response frequency of the second capacitator is higher than a frequency of the high frequency signal inputted via the cable.