Multiemitter transistor
The multiemitter transistor is a special form of bipolar transistor . It has a base (B) and a collector connection (C), but in contrast to conventional bipolar transistors, it has several emitter connections (E 1 , ..., E n ). In terms of circuitry, it represents a parallel connection of several conventional bipolar transistors, the base and collector connections of which are combined into one connection and the emitter connections are available separately.
application
Applications are primarily in the area of bipolar transistor-transistor logic , where the multiemitter transistor is used in the input stage of logic gates (for example NAND gates ) with up to ten emitter connections. In this application the transistor is operated in common base .
The advantage over individual bipolar transistors connected in parallel, especially in the case of integrated circuits , is the reduced chip area. The applications of multiemitter transistors are therefore limited to the area of integrated circuits.
literature
- Ulrich Tietze, Christoph Schenk: Semiconductor circuit technology . 12th edition. Springer, Berlin 2002, ISBN 3-540-42849-6 .