Ultrasonic signal modulation demodulation

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Dino1400

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Hello All,

I'm working on a ultrasonic transmitter and receiver I need to use some sort of modulation and demodulation.
anyone has an idea where to start from, some datasheets for some ICs that I can learn about.

Thank you in advance
 

Amplitude modulation is probably the easiest option, although your carrier frequency is probably around 40 kHz. Your signal cannot be at a very high frequency. It needs to be slow enough so its waveshape is reproducable, as you trace from one peak to the next of the carrier waveform.
 

the articles are really good.
I'm looking at circuit design any article or starting point.
 

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