Ultrasound Receiver Circuit Diagram
Ultrasound Receiver Circuit Diagram
The audio frequencies between 15 kHz and 18 kHz is normally not audible to humans. This audio range is also called ultrasound.
In order to hear it, it must first be converted to a frequency range which is audible to humans.
The circuit featured here mixes the ultrasound with a frequency generated by a BFO circuit. The result is a mixture of several frequencies from which one (the difference) can be clearly heard.
The undesirable signals are filtered out by a 4 kHz low pass filter. The transducer is a special ultrasound sensor. Portable batteries can be used to power this circuit.
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| Ultrasound Receiver Circuit Diagram |
Ultrasound Receiver Circuit Diagram
The audio frequencies between 15 kHz and 18 kHz is normally not audible to humans. This audio range is also called ultrasound.
In order to hear it, it must first be converted to a frequency range which is audible to humans.
The circuit featured here mixes the ultrasound with a frequency generated by a BFO circuit. The result is a mixture of several frequencies from which one (the difference) can be clearly heard.
The undesirable signals are filtered out by a 4 kHz low pass filter. The transducer is a special ultrasound sensor. Portable batteries can be used to power this circuit.