| 摘要 |
Signal-processing phase-locked loops for generating carrier signals normally use varactor oscillator circuits as voltage-controlled oscillators. In the frequency range from a few hundred kHz down to a few MHz, when varactors are used, including those with the so-called hyper-abrupt p-n junction, it is not possible to obtain sufficiently linear control characteristics. In accordance with the invention therefore an oscillator is proposed, the voltage-controlled reactance of which contains a current-balancing circuit. Oscillators of this kind can be used with advantage in all cases where a particularly linear control characteristic is required at frequencies in the specified frequency range. <IMAGE> |
