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Analog Electronics
PNP
NPN
Complementary Complementary
(a)
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(b)
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(a) Darlington connected discrete transistors.
(b) Typical monolithic NPN Darlington power transistor (reproduced by courtesy of Philips Components Ltd).
transistors, especially at high currents, was too
low. The transistor manufacturers' answer to this
complaint was the Darlington, which is now avail-
able in a wide variety of case styles and voltage
(and current) ratings in both NPN and PNP
versions. The circuit designer had already for years
been using the emitter current of one transisto ...