This circuit is from American documentation from the 70s. The circuit makes use of the operating system of the time, but it can be implemented with more modern equivalents.
This circuit is from National Semiconductor documentation. The operational amplifier is of the...
In the figure we have the way to add hysteresis to an operational amplifier. The relationship...
This circuit, from an American publication of 1974, provides a 0.005% regulation with a variation of...