| 摘要 |
<p>CONTROL CIRCUIT FOR LOW NOISE FREQUENCY AGILE OSCILLATOR A control circuit for a voltage-controlled oscillator is shown to include the combination of: (a) a source of D.C. power, the voltage out of such source being adjustable in discrete steps to provide a coarse frequency control signal; (b) a control loop, responsive to the signal out of the voltage-controlled oscillator, to provide a fine frequency control signal; and (c) a summer to combine the coarse and fine frequency control signals into a single frequency control signal for the voltage-controlled oscillator.</p> |
