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.
This is the circuit that decodes the signals from the CIR3059. The adjustment of each frequency is made in...
Found in an American publication in 1967, this circuit makes use of an integrated circuit of the time,...
We found this circuit in the Linear Applications Hanbook of the National Semiconductor in 1994. The...