On Loop Gain of Oscillator Circuit of Three-Point Capacitance
Ma Tian-Cai · 2005
By adopting a simple and easy, we get the calculation formula of common-emitter and common-base configuration loop gain of oscillator circuit of three-point capacitance, hence work out an improved design of quiescence collector current and feedback. On condition that semiconductor triodes not entering saturation region while working in the reserve AGC region , we properly increase quiescence collector current ,making the oscillator start oscillation easily with efficient output amplitude . For oscillator of three-point capacitance , there should be that |F|≤|Fm| , while for parallel type overtone crystal oscillator, there should be that |F|≥|Fm|.