Hi all,
I make a colpitts oscillator simulation with Pspice.But unfortunately it can not get reasonable result.It can not oscillate stably.I set C1,C2,C3,initial condition is 1V and L1 initail current is 1mA.Attach schematics and result FYI.Anyone kindly help me why not oscillate stabily?And How can i tune it?Thanks!
Dear E-design,
I do it as your done.But still the same,Is my setting wrong?Can you share me your source file to me?
Can you tell me how to set the initial condition is reasonable?
Thanks for your kindness.I use OrCAD 9.2.And I re-set the time:transient : 4mS and step :10us,i can get the result but i can not measure the frequency.and if i set the step:100us,nothing i can see.Can you share me how to select the component:C1/C2 value and Zin,and How to run optimum for oscillator?
Thank a lt.Your kind suggest is very helpful to me!Can you give me more guidline about designing oscillator?For example,the negtive resister measure,the component selection...and so on.
Your result look perfect!