Transistor Operating Region

Ask

When transistors are used in digital circuits they usually operate in the
(a) active region
(b) breakdown region
(c) saturation and cutoff regions
(d) linear region

 Answer is (c)

Concept

Digital circuits operate on the principle of binary logic i.e., ones and zeros, which can be represented by high and low voltage levels. Thus transistors in digital circuits operate in saturation and cut-off regions, representing ON and OFF states.