ONNVEHICLE CARRYING RADIO RECEIVER

摘要

PURPOSE:To make it possible to realize high sensitivity while holding band characteristics excellent by lowering reception sensitivity by providing a high-frequency amplifying transistor with a resonance circuit with a resonance frequency nearly agreeing with that of an antenna. CONSTITUTION:Resonance circuit K with a resonance frequency nearly agreeing with that of an antenna is provided to a high-frequency amplifying transistor or a bias circuit fo FET to lower reception sensitivity. As a result, when an antenna with its resonance point within a reception band is used, constant sensitivity can be obtained covering the whole reception band and high sensitivity can be realized with band characteristics held excellent.