I was looking for first documented use of this circuit as a motor controller. I've not been successful using Google searches as a lot of recent patents, hobby designs, and basic instructional topics come up. Can anyone help with search terms or links to articles?
I was interested because of an article my grandfather wrote back in 1954 using a half bridge PNP/NPN circuit to control a brushed motor. That is around when silicon transistors first started to come out.
Thanks.