This circuit was found in the February 1970 issue of Radio Electronics magazine. The integrated circuit is a type of the time. It consists of a high-gain differential amplifier.
We found this circuit at Modern Electronics in January 1991. The magazine no longer exists, but...
Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the...
This sophisticated circuit using a liquid crystal display was found in Radio Electronics from the...