sweetlou257
Newbie level 1
Hello,
I'm new to this forum and I was wondering if I could get some help on a project. I basically need to make an FSK modulator using discrete components. I've been looking into using the colpitts oscillator and have heard about using a varactor diode to change the capacitance using voltage. The problem I'm having is that I don't know how to implement the diode. Here's the circuit that I'm current testing with PSPICE and I'm not sure if the diode model I'm using is the correct one, but the output only oscillates at one frequency. Any help would be appreciated.
Thank you.
I'm new to this forum and I was wondering if I could get some help on a project. I basically need to make an FSK modulator using discrete components. I've been looking into using the colpitts oscillator and have heard about using a varactor diode to change the capacitance using voltage. The problem I'm having is that I don't know how to implement the diode. Here's the circuit that I'm current testing with PSPICE and I'm not sure if the diode model I'm using is the correct one, but the output only oscillates at one frequency. Any help would be appreciated.
Thank you.