Parametric oscillators and amplifiers. I
B.K. Jones · Physics Education · 1973
For pt. I see ibid., vol.8, no.5, 310 (1973). An oscillating system is conventionally excited by a force at the resonant frequency. In the normal electronic feedback oscillator or signal generator this is derived, via the amplifier, from a DC source. Thus the net effect is that of frequency conversion of power from zero frequency to the oscillation frequency. For the parametric oscillators discussed the conversion is from a frequency 2 omega 0 (say) to a frequency omega 0.