regarding FM radiodesign

rmn_tech said:

NTSC (No Two Similar Colours)

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audioguru said:

Remember when North American TVs had a "flesh-colour" correction circuit?
Apples and bananas were orange like over-saturated flesh colour.
Grass was blue like the sky.

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RadioRon said:

Yes, that would be OK. Design a bandpass filter for 90 to 100MHz. Often, we integrate such filters into our amplifiers, by putting one at the input and another one as the output load of the transistor. This makes a Tuned RF Amplifier.

Don't make your filter too complicated. It would be fine if you could attenuate the signals outside your band by 30 dB or maybe 40 dB, and in this case, you might consider using a 4 pole configuration. Such a filter would typically include two inductors and two capacitors. This is as complicated as you want to get for your filter, anything bigger is just too much. Simpler is OK of course. One efficient approach would be to have a single LC (two pole) tank circuit at the input of your RF amp and another LC at the output. You can tune the center frequency of each of these parallel resonant circuits at slightly different frequencies so as to get a flat response from 90 to 100MHz. Try googling on Tuned RF Amplifier for some typical schematics.

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