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sine wave signal oscillator

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RITESH KAKKAR

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Re: sin wave signal oscillator

1. Pick BC547B or other real transistor instead of using generic NPN
2. Skip initial transient solution in simulation command (UIC option) for reliable oscillation start

The circuit dimensioning is apparently far from optimum. Changing the 470 nF capacitor to 100 nF makes it work also with generic NPN.
 

Re: sin wave signal oscillator

Hello,
It is working how it is generating SIN wave?
 

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Re: sin wave signal oscillator

I do not see how the circuit can work. The transistor is biased completely wrong and is saturated.
I am simulating it with a very low input level and a fairly high input level:

EDIT: Oops! I did not notice that the 12k resistor connects to the collector.
 

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Re: sin wave signal oscillator

RITESH KAKKAR said:
for learning.
Click to expand...

OK - good reason.
My recommendation: Start with feedback circuits, the definition of "loop gain" and the criterion for oscillation (Barkhausen criterion)
 
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