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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 71,443 of 72,318   
   riccardo manfrin to All   
   Re: Colpitts oscillator   
   05 Oct 19 14:26:17   
   
   From: riccardomanfrin@gmail.com   
      
   Thanks for all your help guys.   
   I've managed to see the oscillation by looping the probe with ground. Than I   
   tried again probing at the collector, this time with 10x instead of 1x, and I   
   managed to see the 80mV 10MHz waveform.   
      
   At that point I wanted to linearly amplify with a simple single stage common   
   emitter bjt, but had no success.   
      
   I think the biasing was correct.. I was in the linear zone, but I have the   
   doubt if the input to output impedance ratio between the two stages (the osc   
   and the linear amp) is killing the waveform input signal at the base of the   
   bjt...   
      
   Can you give me some piece of advice?I'll be posting the biasing of the linear   
   bjt amp when I'll be in front of the breadboard   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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