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.
We found this circuit in documentation from Analog Devices from the 90s. The components are from...
This circuit came out in a publication called Electronics Handbook of 1993. The circuit triggers an...
This circuit was found in the December 1993 issue of Electronics Now. With the components shown the...