#generator.electronic_device  an electronic device for producing a signal voltage
  supertype:  electronic_device  a device that accomplishes its purpose electronically
  subtype:  oscillator  generator that produces sonic oscillations or alternating current
     subtype:  crystal_oscillator__crystaloscillator__quartz_oscillator  an oscillator that produces electrical oscillations at a frequency determined by the physical characteristics of a piezoelectric quartz crystal
     subtype:  local_oscillator__localoscillator__heterodyne_oscillator  an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones
  subtype:  pulse_generator__pulsegenerator  a generator of single or multiple voltage pulses; usually adjustable for pulse rate
     subtype:  pinger  a pulse generator used for echo sounding in sonar

No statement uses or specializes generator.electronic_device; click here to add one.