Patent ID: 6388496
Filing Date: 2002-05-14
Classification: H03F,H03K

Abstract:
A semiconductor output circuit comprising:a bipolar transistor; a load circuit of said bipolar transistor; a circuit comprised of an active element or an impedance element a terminal of said circuit being connected to a connecting portion of said bipolar transistor and said load circuit; and a protective diode configured to protect said bipolar transistor, wherein said circuit comprised of the active element or the impedance element causes a reverse operation of the bipolar transistor reversing a polarity of a difference in potential between a collector and an emitter thereof in comparison to a normal bias state, said protective diode protects said bipolar transistor from said reverse operation, and an anode of said protective diode is connected to a P type side of a base-collector PN junction of said bipolar transistor while a cathode of said protective diode is connected to an N type side of the base-collector PN junction of said bipolar transistor.