Almost the same, but improved since it has a galvanic isolation and inverted output. However your exaple implies that "another circuit" is sink output (open collector). <!-- Begin schematic: In order to preserve an editable schematic, please don't edit this section directly. Click the "edit" link below the image in the preview instead. --> ![schematic](https://i.sstatic.net/V8rJ7.png) <!-- End schematic -->