This filter is from a 1977 publication. The circuit employs three 741 or other operational amplifiers. The supply must be symmetrical and the components with (*) are low tolerance.
This circuit was found in a Radio Electronics from June 1967. The regulator is suitable for power...
This random noise or white noise generator was published in Radio Electronics magazine in July...
We found this circuit in the 1990 Radio Electronics Special Projects magazine. The circuit has a...