We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994. The circuit can be adapted to use other operational amplifiers and the power supply must be symmetrical.
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...
This circuit must have its input connected to the collector of the last IF transistor of the FM...
The circuit shown can measure currents less than 1 uA and is powered by two 1.5 V batteries in a...