This circuit was found in 1980s American documentation. The transducer is a piezoelectric capsule and the power supply voltage can be between 3 and 18 V.
Suggested by National based on the LM6218, this circuit from the 90s has high speed...
This circuit was found in an ancient American documentation. With it is possible to double the...
This circuit was obtained from the Radio Electronics magazine of April 1991. The circuit is based...