The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
This simple window comparator based on the well-known LM339 was found in the June 1998 issue of...
This multivibrator with the 4001 was found in the November 1974 Radio Electronics magazine. The...