Filtering System, Filtering Method, TV Signal Receiver and TV Signal Receiving Method

摘要

A filtering system includes a first filtering module, which includes a first frequency translating device and a first filter. The first frequency translating device includes a center frequency control end that receives a first control signal and an input end that receives an input signal, and performs a first frequency translation on the input signal by utilizing a first control frequency of the first control signal as a center frequency. The first filter performs a first filter on the input signal according to equivalent impedance of a circuit coupled to the input end, and generates in collaboration with the first frequency translating device a first filtered input signal at an output end of the filtering system. The equivalent impedance determines a bandwidth of the first filtered input signal.

主权项

1. A filtering system, comprising:
an output end; and a first filtering module, comprising:
a first frequency translating device, comprising a center frequency control end and an input end, the center frequency control end configured to receive a first control signal, the input end configured to receive an input signal and being coupled to a circuit having equivalent impedance, the first frequency translating device configured to perform a first frequency translation on the input signal by utilizing a first control frequency of the first control signal as a center frequency; anda first filter, configured to perform a first filtering on the input signal according to the equivalent impedance, and to generate in collaboration with the first frequency translating device a first filtered input signal at the output end of the filtering system, wherein the equivalent impedance determines a bandwidth of the first filtered input signal.