I'm trying to plot gain and phase for this circuit using LTSPICE but I don't think my response is correct. I think maybe I am missing something during use this software. I already insert AC amplitude but it still gives me the same response. Can someone help me to figure out it? :lol:
Sorry,I forgot to update the current diagram and thanks for your "wish" erikl opcorn:. After done some reading, I try to make some changes to the circuit. As I know, oscillator circuit need 180 phase shift (at least two poles). What I did actually is I'm connecting the first block of the circuit to another circuit block which is a common source amplifier. From my understanding, this will produce two poles (180). After done some simulation, this is what I obtained. My question is why I still get 90? I already remove the compensation capacitor. Do I need to add another RC circuit to get 180 phase shift? Please correct me if my understanding is wrong.
Actually i'm quite confused what is the difference between input voltage,Vin and also the bias voltage. Why we still need Vin if we already have the bias voltage? What is the real function of Vin in the circuit?
To measure frequency response in AC analysis, there must one (and only one) independent AC source, either voltage or current. You have chosen a current source, your curves respectively show transimpedance rather than voltage gain.
I thought up to now it's well considered, just wondered how's the resonator connected to form an oscillator?
Thanks FvM for your reply! I really appreciate your explaination but I don't quite understand your second question. If i remove the current source and replace it with an input voltage and connect the resonator between the output and this input,for sure it will produce oscillation right? Please correct me if my understanding is wrong.