This circuit was found in a 1967 Electronics World. We can design it with a BF245 for the FET and a BC558 for the bipolar transistor. The circuit has 3 scales and a 10 M ohm input resistance.
We found this circuit in a 2005 Linear Technology manual. The resistor is calculated for the...
The circuit shown was found in American documentation from the 1990s. The transistor can be of any...
This circuit combines a low-offset and a high-speed operational amplifier. The circuit was found in...