| 摘要 |
<p>The arrangement includes a decoder for providing sum and difference channel signals from intermediate frequency signals. A manually controllable capacitance is coupled across an oscillator coil and a voltage controlled capacitive device is coupled in series with the capapcitance. A source of control voltage is coupled to the voltage controlled device, the control voltage being related to the difference channel signal of the decoder. The output of the local oscillator is coupled to the input. A second voltage controlled capacitive device is coupled in parallel with the oscillator coil, and coupled to the source of control voltage.</p> |
