We found this circuit in an old American documentation. The operational amplifier is from the time and the output used to control an SCR or other power control.
March 2017 - Texas Instruments LM5166 Synchronized Buck Converters are available at Mouser for 3V...
The second order filter shown in the figure is suggested by Texas Instruments, based on the TL081...
This pattern of TTL frequencies was found in an 80s manual. The circuit must be powered by 5 V and...