This configuration was found in an English magazine from 1965. It is valid for any junction FET. The input impedance is 5.5 M ohm higher than conventional stages.
We found this circuit in an American 1980s documentation. Other comparators can be used and the...
This two-phase stepper motor circuit was found in an old documentation using an operational amplifier...
We found this configuration in an American technical documentation of 1977. The circuit can...