This Linear Technology circuit can measure currents from 100 pA to 100 uA. The circuit is from the 80's, using a component of the era. Transistors are general purpose types.
In the diagram we show how to divide the frequency by multiples of 10 using several CMOS...
The integrated circuit used in this application is a double 741 from SGS. The supply must be...
This circuit was found in a 1978 English magazine. It is a configuration that aims to select the...