This circuit is from the Motorola Linear Databook of 1990 and can be implemented with other operational amplifiers. The power supply must be symmetrical.
Originally this circuit is from an English magazine, but I found it in Argentina's Radio Chassis...
This circuit was found in the December 1992 Radio Electronis magazine. R2 is an NTC, there is a...
If you have a common analog multimeter, you can increase its input resistance in the measurement of...