The reference voltage for this circuit can be selected digitally. The circuit is from Radio Electronics dated February 1981. The 741 must be powered by a symmetrical source.
We found this circuit in a Popular Electronics from the 90s. Transistors can be modern...
This circuit was obtained in a Motorola documentation from 1968. The circuit uses a power...
This circuit was published in Radio Electronics magazine in June 1959. The circuit uses an...