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Q1 is CB oriented, Q2 is follower, emitter coupled to Q1. Amplifier input is base of Q2 and output is collector of Q1. Amplifier gain is >+1. Feedback over C=15pF between input and output is positive and oscillation conditions are fullfiled. Oscillator is RC type. Pulse generator on left is simply a switching generator which interupts continious oscillation.
Oscillator output is taken from the Q2 collector to isolate load from the oscillator.
Q1 is CB oriented, Q2 is follower, emitter coupled to Q1. Amplifier input is base of Q2 and output is collector of Q1. Amplifier gain is >+1. Feedback over C=15pF between input and output is positive and oscillation conditions are fullfiled. Oscillator is RC type. Pulse generator on left is simply a switching generator which interupts continious oscillation.
Oscillator output is taken from the Q2 collector to isolate load from the oscillator.
Thank you very much. I got it now. I had always thought it is an multivibrator, now i anderstand it only an positive feedback of Q1, Q2 is only an fellow.
thanks again.
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