| 摘要 |
<p>An oscillator, comprising a capacitance (22), charging means and discharging means for charging and discharging the capacitance, feedback means for activating the charging and discharging means in dependence on an oscillator signal, and an amplifier (50-62) for amplifying a capacitance voltage, can be phase-controlled in that the amplifier comprises a control input for adjusting a phase difference between a zero-crossing of an amplifier output signal (V2) on the one hand and a reference phase (V1) in the oscillator signal on the other hand. In order to maintain the duty cycle, switching means (90) are provided for reversing the polarity of the control input under the control of the oscillator signal.</p> |
