| 摘要 |
<p>PHASE LOCK SYSTEM A second-order phase-locked loop circuit which does not require error voltage amplification is described. The output of a voltage controlled oscillator is accurately phase locked to a reference pulse. The loop phase detector is periodically enabled by a pulse generator and draws current only when enabled. Therefore very little noise may be coupled to the voltage controlled oscillator. The phase detector incorporates a current amplifier which allows very accurate establishment of the instant phase comparison takes place.</p> |
