The circuit is from 80s Siliconix documentation. The integrated circuit is from the company and is not common today. It can be used operational equivalent more common in our times.
An interesting bandwidth filter configuration suggested by Texas Instruments in its Linear and...
We found this circuit in a 1966 RCA manual. The integrated circuit is unusual, and the Triac must...
This vox was found in Hughes documentation from 1968. The circuit uses components from the era. A...