Broadband television tuner front end

摘要

A broadband television receiver front end for receiving a broadband RF input signal and outputting an IF output signal is disclosed. A high pass input filter on the front end attenuates carrier signal frequencies that lie below a cut off frequency of said high pass filter. Thereby advantageously allowing for a number of carrier signals to propagate below the cutoff frequency in such a manner that these signals have a decreased effect on television signals propagating within a television signal band. By high pass filtering on the input a low noise amplifier disposed for receiving a filtered signal from the high pass filter does not amplify noise caused by lower frequency carriers. As a result an amplified signal provided to up-conversion and a down-conversion mixers results in an increased immunity to noise in the output IF signal from the front end.