Found in a 90s R-E Experimenter Handbook, this circuit has a greater gain than the previous one for presenting two stages. The integrated circuit used is uncommon today.
In a voltage follower the gain is unitary. Input impedance is too high and output impedance too low....
This simple sensitive circuit was suggested in a July 1992 Radio Electronics issue. The relay is a...
This circuit generates sine low-frequency signals. The frequency depends on the twin-T network....