B21126E)
This circuit was taken from an old Popular Electronics. The circuit can have its frequency changed from an external signal. The center frequency is given by C1.
This simple transistorized game that appears in other versions in this section and website, was...
Microsemi Le87557 Differential Amplifier Mouser Electronics offers Microsemi Le87557 single...
In the figure we have an interesting configuration in which we took advantage of the very high...