The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
Found in documentation from the 1980s, this circuit can have several adaptations to use modern...
This receiver for listening to the TR-23 phone was manufactured in Japan in the 1960s. The circuit is...
The frequency of the tone produced by this oscillator depends on the amount of light falling onto...