I'm trying to build a Common Base Colpitts Oscillator for a project in my university. I've been failing at this for somewhat over a month now. I've tried various times to build the actual circuit, but the oscilloscope isn't reading anything from my circuit.
The only specification is that the peak should be at around 450-550KHz.
I've also tried the circuit in various PSPICE simulations.
I was previously trying a different configuration, but I kept getting an overdamped sinusoid displayed below:
The current schematic I am using is this one:
This is my output:
For some reason that I cannot make sense of, at 21ms the oscillations disappear. I can't seem to understand why, and this is part of the problem.
http://www.electronics-tutorials.ws/oscillator/colpitts.html
I've been using the above link as a guide / reference.
I played around with some numbers and I'll try them on PSPICE sometime this week, but the circuit didn't work in the lab and the oscilloscope still didn't get any readings, so I doubt they'll work on PSPICE.
Please let me know if you see something that I am doing wrong, if you have any suggestions for a different configuration, anything would be of great help. I'm really perplexed on this one.
The only specification is that the peak should be at around 450-550KHz.
I've also tried the circuit in various PSPICE simulations.
I was previously trying a different configuration, but I kept getting an overdamped sinusoid displayed below:
The current schematic I am using is this one:
This is my output:
For some reason that I cannot make sense of, at 21ms the oscillations disappear. I can't seem to understand why, and this is part of the problem.
http://www.electronics-tutorials.ws/oscillator/colpitts.html
I've been using the above link as a guide / reference.
I played around with some numbers and I'll try them on PSPICE sometime this week, but the circuit didn't work in the lab and the oscilloscope still didn't get any readings, so I doubt they'll work on PSPICE.
Please let me know if you see something that I am doing wrong, if you have any suggestions for a different configuration, anything would be of great help. I'm really perplexed on this one.