This circuit operates from 20 Hz to over 20 kHz and is easily tunable. We found it in a 70s documentation. The circuit can be implemented with modern operational amplifiers.
Obtained from a 1980s Linear Technology documentation, this circuit has a hysteresis of less than...
Found in documentation from the 1980s, this circuit makes use of discrete components of the time....
With this 1-transistor circuit we have a high input impedance and good gain. The circuit is from a...