TUNER CAPABLE OF REDUCING POWER CONSUMPTION AND HEAT GENERATION

摘要

The present invention provides a tuner that can reduce the power consumption and at the same time reduce the amount of heat generated to improve the reliability. In this tuner, one broadband amplifier BC1 consisting of one transistor Q3 constitutes a buffer amplifier. In addition, the broadband amplifier circuit BC1 is DC-coupled to the first local oscillation circuit OC1. The circuit configuration of the buffer amplifier can be simplified to reduce noise. The power consumption is reduced by the direct current coupling of the amplifier circuit BC1 and the oscillator circuit OC1.