Patent ID: 7466973

Claim:
A single conversion tuner adapted to selectively receive modulated signals of a first and a second type at an input, the signals of the first type being modulated according to a first modulation scheme and the signals of the second type being modulated according to a second modulation scheme, wherein the first modulation scheme requires a flat amplitude response over a predetermined bandwidth, and wherein the second modulation scheme requires a predetermined ratio of image rejection, including a tuneable bandpass filter that is adapted to provide a flat amplitude response over the predetermined bandwidth for receiving signals according to the first modulation scheme and which provides a first ratio of image rejection, wherein the ratio of image rejection provided by the tuneable bandpass filter is smaller than required for the second modulation scheme, wherein an image reject mixer providing a second ratio of image rejection is connected to the tuneable bandpass filter, wherein the ratio of image rejection provided by the image reject mixer is smaller than required for the second modulation scheme, wherein the first and second ratios of image rejection are selected so that the sum of the ratios of image rejection achieves or exceeds the required predetermined ratio of image rejection for receiving signals according to the second modulation scheme, and that an intermediate frequency signal is present at an output of the image reject mixer.