This circuit can be used as an amplifier for musical instruments or even with your cell phone. The circuit is old and was found in the 1990 edition of Radio Electronics Experimenter magazine.
Suitable for the use with sensors, this circuit from National Semiconductor appears in other...
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
This circuit has a very high input impedance and a very low output impedance. We found it on a...