This Texas Instruments circuit is from the 80's. However, it can be implemented with modern operating systems. The power supply must be symmetrical.
This circuit was found in a Popular Electronics of the 90s. The resistor R4 determines the load...
Obtained from a 1980s Signetics documentation, this circuit uses a common integrated circuit at the...
We found this circuit in the Linear Applications Handbook by National Semiconductor. The circuit is...