ultrasonic sensor modulation and demodulation

Thread Starter


Joined Mar 17, 2009
Hello all,

I'm looking for some suggestion on modulation of the ultrasonic signal (40KHz) at the transmitter and demodulation at receiver.
any document or starting point of a schematic.

Thank you in advance


Joined Nov 30, 2010
What type of modulation?
Frequency? Amplitude? Phase?
How much power is involved in this? Milliwatts? Killowatts?
There is a lot of information not provided.
When the, "what kind" and, "how much" arrives, the, "why" will probably be apparent.