| 摘要 |
<p>The oscillator counts the received vertical frequency and generates frequency proportional to the frequency of received vertical signal. The oscillator comprises a frequency to voltage converter (10) for converting the received frequency to voltage, a frequency discriminator (20) for comparing the voltage with a reference voltage to discriminate the input frequency, a drive unit (30) drived according to the discriminated logic of the frequency discriminator (20), a frequency selector (40) for selecting the oscillator frequency according to oscillation time constant, and a vertical oscillator unit (50) for generating vertical frequency according to the selected frequency.</p> |
