Hi,
I'm trying to design a demodulator for a radio. The AM frequency that I want to tune into is approximately 1.2MHz. The thing i'm confused about is how to choose the values for my RC low-pass filter. How do I find out what's the frequency of the actual useful signal and the frequency of the carrier? I'm planning on using the BC108 BJT (see the attached schematic), but my reason for that is because I'm most familiar with it, which I doubt is a very good technical reason. Any help there would be appreciated. Also, are there any other factors that I have to take into consideration?
Thanks a lot.
I'm trying to design a demodulator for a radio. The AM frequency that I want to tune into is approximately 1.2MHz. The thing i'm confused about is how to choose the values for my RC low-pass filter. How do I find out what's the frequency of the actual useful signal and the frequency of the carrier? I'm planning on using the BC108 BJT (see the attached schematic), but my reason for that is because I'm most familiar with it, which I doubt is a very good technical reason. Any help there would be appreciated. Also, are there any other factors that I have to take into consideration?
Thanks a lot.
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