Afc system for microwave energy sources

作者: Stanley Roelofs , John R Buckley

DOI:

关键词: Local oscillatorAnalog transmissionPhysicsPulse-frequency modulationElectronic engineeringRadio transmitter designOpticsPulse-density modulationVoltage-controlled oscillatorPhase-locked loopSignal transition

摘要: The output of a microwave oscillator is mixed with an FM modulated crystal controlled reference frequency to develop difference frequency. resulting filtered in low pass filter having predetermined slope and detected. detected modulation signal has phase angle according whether the greater or less than signal. compared sensitive discriminator DC which applied change thereof.

参考文章(3)
Peter Maitland, Edward Winn Roger Frederick, Afc system with a beat frequency drift cancellation oscillator ,(1965)
Frankel Sidney, Automatic frequency control system ,(1948)