![]() This means that the transistor is saturated and switches in the same way regardless of whether the load is connected to the collector or the emitter. However, in the case of general-purpose photocouplers, the base of the phototransistor is left unconnected, so the base current always flows from the collector. When a regular transistor is used as a switch, the operation differs depending on whether the load is connected to the emitter (emitter follower or common collector) or the collector (common emitter). When photocouplers are used as switching devices, the phototransistor on the output side operates simply as a switch. ![]() ![]() The Transistor on the Output Side Operates as a Switch The operation of photocouplers when used as switching devices is more basic, so we will start by describing this operation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |