Hello!
I have to make a Colpitts oscillator working on 1.1 GHz, and another Colpitts oscillator on 1.52 GHz.
Here is the circuit:
https://imgur.com/a/4irBu
The frequency is about 880 MHz, and i've already tried a lot of different values for L1, C1,C2 but i can't increase the frequency to 1.1 GHz. My professor said that there is no problem with the circuit, so let's try again and again, but i've no more ideas. I've already calculate(Thomson formula) that if C1=C2=1 pF and L1=5 nH, the circuit has to work on 3,1 GHz(??).
So, what do you think? What is wrong, what should i do?
Thank you
I have to make a Colpitts oscillator working on 1.1 GHz, and another Colpitts oscillator on 1.52 GHz.
Here is the circuit:
https://imgur.com/a/4irBu
The frequency is about 880 MHz, and i've already tried a lot of different values for L1, C1,C2 but i can't increase the frequency to 1.1 GHz. My professor said that there is no problem with the circuit, so let's try again and again, but i've no more ideas. I've already calculate(Thomson formula) that if C1=C2=1 pF and L1=5 nH, the circuit has to work on 3,1 GHz(??).
So, what do you think? What is wrong, what should i do?
Thank you
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