simple fixed-frequency Wien oscillator Gain

Thread Starter

ngfl

Joined May 12, 2017
4


Hi, This photo is simple-fixed Wien oscillator. How can to find the voltage gain calculator?

with op-amp Gain = 1 + R3/R4 but op-amp not use at this circuit.
 
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Alec_t

Joined Sep 17, 2013
10,745
Consider first the transistor amplifier stage comprising Q2, R6, R7, R1, R8. Do you know how to calculate the gain of that stage?
 

Thread Starter

ngfl

Joined May 12, 2017
4
Consider first the transistor amplifier stage comprising Q2, R6, R7, R1, R8. Do you know how to calculate the gain of that stage?


Ib1,Ib2,Beta1,Beta2 find with proteus. This photo is correct or not for gain calculation ?

I do not know how else to do this

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