This circuit was found in Raytheon's 1967 documentation. The circuit uses an operating of the era, but the configuration can be applied to modern operational amplifiers.
This common operational PLL circuit was found in a Popular Electronics 90’s. The power supply need...
This circuit for multiple sound inputs was found in a Radio Electronics from January 1992. It...
The circuit shown in the figure is suggested by AllegroMicro (www.allegromicro.com) and consists of an...