| 摘要 |
<p>A capacitor (3) provides the control voltage for a voltage-controlled oscillator (1) via a filter (15) and a phase comparator (2) provides UP and DN signals for changing the capacitor up and down from a single current source (14) via switches (13 and 12) when UP is true and DN is false and via switches (12 and 11) when DN is true and UP is false. The switches (10 and 11) are diodes switched rapidly by the smallest possible changes in the bias voltages therefor.</p> |
