Found in a 1980s documentation, this amplifier uses an integrated circuit that is not easy to obtain now as it is of the era. The circuit is intended for FI ceramic filter circuits.
The circuit shown in the figure can be used to detect vibrations or to provide amplified acoustic...
Found in a 90’s Popular Electronics, this circuit applies to almost any operational amplifier. With...
We found this circuit in an old American documentation. The table gives the values of the...