We found this circuit in a Motorola documentation from 1968. Phototransistors are common and bipolar general purpose.
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
Found in Texas Instruments documentation from the 1980s, this circuit applies to digital signal...
This circuit was found in a 1980s US publication. There may be some difficulty in obtaining the...