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I am building a Colpitts Oscillator that produces a frequency of 500 kHz with 5 volts peak to peak. I think I have designed the tank circuit correctly but I am not sure how to bias the transistor properly so that I get sustained oscillations and so that the oscillations remain at 5 volts peak to peak.Here is my work so far:enter image description here enter image description here

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  • \$\begingroup\$ Your design is reasonable, and should oscillate. Perhaps your simulator needs a smaller time-step. Or your oscillator needs a kick-start. \$\endgroup\$
    – glen_geek
    Apr 13 '20 at 23:18
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The PI resonator has 8:1 stepup ratio; thus 5 volts input will become (ignoring Rin of the gain stage as the load) 40 volts. I'd rethink that.

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  • \$\begingroup\$ I'm not sure I understand. what do you mean by the PI resonator has a 8:1 ratio? \$\endgroup\$ Apr 16 '20 at 13:54

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