Today we have more compact solutions. This is from a Radio Electronics magazine from October 1990. It uses the technology of the time.
This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's...
The circuit shown in the figure has an output voltage rise time of 0.22 ms and an input time...
November 2016 - The On Semiconductor Reference Development Kit and WDK1.0GEVK Reference Kit can...