This circuit uses amplifiers from the 60's American company Microlin. The circuit can be designed based on modern operational amplifiers.
Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz....
The gain of this amplifier is given by the 120k resistor, which can be changed depending on the...
This sensor circuit for a small robot was found in a Popular Electronics from the 90s. The circuit...