Based on Texas Instruments documentation, this circuit serves for sensor interfacing. The circuit is based on the LF411, but other operational ones can be used.
This circuit was obtained from a 1966 documentation. The transistors are of the time. The circuit...
This precision rectifier circuit is suitable for applications in an AC / DC converter. We find it...
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...