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采用变容二极管调谐的扫频振荡器其调制电压u(t)通常是直接加在变容管二端,这样使振荡器的瞬时频率ωi(t)与调制电压之间的比值不是常数,而是调制电压的函数。
The varactor tuned by a varactor has a modulation voltage u (t) which is usually applied directly to both ends of the varactor such that the ratio of the instantaneous frequency ωi (t) of the oscillator to the modulation voltage is not constant, Is a function of the modulation voltage.