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Doppler Ultrasound Receiver Circuit

2017-09-13 06:45  
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XTAL1 drives amplifier Q3/Q4, which is tuned to 2.25 MHz. The detected signal is fed to audio amplifier ICl. A 9-V supply is used.
Doppler Ultrasound Receiver Circuit

The circuit operates at 2.25 MHz and is designed to be used with an ultrasonic sound transmitter at this frequency.

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