This amplifier for instrumentation with very high input impedance was found in a manual of JFET circuits. The operational ones used are current and the power supply must be symmetrical.
This circuit is from an American documentation from 1954 and is indicated for use in toys with a...
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...
In the figure we have a security system consisting of a sophisticated alarm found in a 90s edition...