The circuit shown in the figure can be designed with more modern operational amplifiers, as it is from 1994 documentation by National Semiconductor. The power supply must be symmetrical.
This is a circuit published in the January 1962 Radio Electronics magazine. The circuit is for...
We obtained this configuration from an old RCA manual of linear integrated circuits. The...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...