This input circuit for meters, which can also be used as a shield, is intended for operation with very low frequency signals. The power supply must be symmetrical.
This circuit was published in a 1979 magazine, but it can still be easily assembled, as the...
Common general purpose silicon diodes when direct biased provide a voltage fall of about 0.6 to...
This circuit was obtained in the SGS manual of linear integrated circuits of 1982. The components used...