This is my circuit:
In the current state as it is in, it doesn't function correctly, meaning the modulation is not present when I use small value inductors.
When I use 100K resistors instead of 10K resistors, and 1uH inductors instead of 0.1uH inductors, the result at OUT is 3x the power of the result at Q1 collector and the waveform appears to be normal and in-sync with the inputs.
The problem with 1uH is that I want to aim for a transmission frequency of 433Mhz or 900Mhz if 433 is not feasable (depending on local conditions). and if I use 1uH for 433Mhz then I'll have to use ridiculously small capacitor values (under 1pF) which I think is not possible and/or will not work.
One input here is a constant 160Khz signal. Later, I'll change this slightly to allow binary data to change the phase of the signal. I'll use BPSK through xor gates.
The other input right now is a constant 80Khz signal used for troubleshooting purposes. Later, I'll convert it into a switch to turn the transmitter on or off as desired.
Since this circuit can work for lower transmission frequencies and I need something for higher transmission frequencies, How do I properly scale the components to make higher transmission frequencies possible?
In the current state as it is in, it doesn't function correctly, meaning the modulation is not present when I use small value inductors.
When I use 100K resistors instead of 10K resistors, and 1uH inductors instead of 0.1uH inductors, the result at OUT is 3x the power of the result at Q1 collector and the waveform appears to be normal and in-sync with the inputs.
The problem with 1uH is that I want to aim for a transmission frequency of 433Mhz or 900Mhz if 433 is not feasable (depending on local conditions). and if I use 1uH for 433Mhz then I'll have to use ridiculously small capacitor values (under 1pF) which I think is not possible and/or will not work.
One input here is a constant 160Khz signal. Later, I'll change this slightly to allow binary data to change the phase of the signal. I'll use BPSK through xor gates.
The other input right now is a constant 80Khz signal used for troubleshooting purposes. Later, I'll convert it into a switch to turn the transmitter on or off as desired.
Since this circuit can work for lower transmission frequencies and I need something for higher transmission frequencies, How do I properly scale the components to make higher transmission frequencies possible?