| 摘要 |
PROBLEM TO BE SOLVED: To provide the TV reception tuner by which a high frequency device that is designed to be a separate unit is configured at a lower cost with a simple configuration. SOLUTION: In the TV reception tuner that includes a mixer 14 and an IF amplifier section 15 which receives a local oscillation frequency from an antenna tuning circuit 12, an RF amplifier 13 and a local oscillation circuit 14a connected sequentially and in which the local oscillation circuit 14a is operated by a PLL circuit 18 based on a reference oscillation signal with a prescribed frequency from a crystal oscillator 17, the PLL circuit 18 is provided with a buffer amplifier to extract the reference oscillation signal from the crystal oscillator 17 and the TV reception tuner 10 is configured such that an output signal from the buffer amplifier is outputted as a reference signal to a PLL circuit 20 that activates at least one circuit 19 provided in a high frequency device 19 designed as a separate unit. |
