Principles of Analog Electronics

Principles of Analog Electronics

118

4.5.2 Ideal Current Source

An ideal current source is dened as a two-terminal device capable of producing

and maintaining a dened current i

s

(t) for any voltage at its terminals.

Therefore, as dened, we describe a constitutive equation by

i

s

(t) = f

i

(t)

where f

i

(t) refers to an arbitrary function that does not have any dependence on

other electrical parameters. Considering such independence, the source we are

talking about is also said to be an independent current source.

The independent source of current is typi-

cally used as a model for various electronic cir-

cuits containing real active elements.

When the fu ...