TV receiver with temperature compensation to frequency response of lithium niobate SAW filter by means of tuner or equaliser

摘要

A video signal reproducing circuit comprises at least a tuner (1) for receiving a broadcast signal and frequency-converting it into an intermediate frequency signal, a surface acoustic wave filter (2) using a lithium niobate substrate electrically connected to the output side of the tuner, and a video equalizer (4) electrically connected to the output side of the surface acoustic wave filter via a detection integrated circuit (3). The tuner has a temperature-frequency characteristic or the tuner and the video equalizer have temperature-frequency characteristics to compensate a temperature-frequency characteristic of the surface acoustic wave filter.