| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a simplified synthesizer circuit in small scale. SOLUTION: A first local oscillation signal from a first synthesizer part 101 is duplexed by a duplexer 106 and outputted to a first mixer 4 as a local oscillation signal for receiving. A fourth mixer 103 mixes the first local oscillation signal and a second local oscillation signal from a second synthesizer part 102 and a first band pass filter 104 selects the signal of the added frequency component of first and second local oscillation signals and outputs the result to a third mixer 14 as a local oscillation signal for transmitting. A second band pass filter 105 selects the signal of the subtracted frequency component of first and second local oscillation signals and outputs the result to a modulator 12 as a local oscillation signal for modulation.</p> |
