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.
This input circuit for meters, which can also be used as a shield, is intended for operation with...
The circuit shown in the figure is indicated for applications that use inductive transducers, such...
This circuit was obtained in an Electronics Now of the 90s. The circuit monitors the DIN connector of...