This very low current circuit was found in the April 1995 issue of Electronics Now magazine. The circuit operates at voltages from 6.5 to 10 V.
With the presented circuit it is possible to measure resistances of many megohms using a low...
This high input impedance circuit is suggested by Motorola's 1993 Linear Interface ICs. The power...
This variation circuit with the L121 A was found in the SGS manual of integrated circuits of 1982....