Download generators - ingles-escrito-uah-08


An electric network is
excited when there is an
answer, that means,
there are currents on the
electric branches and
voltage on its branch
points.
GENERATORS
A generator is a
device whose
function is excite
the electrical
circuits.
These devices can be classified in:
Voltage
generators
and
Current
generators
And they can be classified in

real

ideal
The real voltage generator

For purposes of study it device is
equal to an ideal voltage generator
serial with a resistance.
In this type of
device, the
potencial difference
in its terminals
depends on the
current that flows
through it.
For many purposes in
practice this generators
can be built but it can be
considered as an ideal
generator.
For example:

A battery

A common collector
transistor
The real current
generator

For purposes of study it device is
equal to an ideal current
generator in parallel with a
resistance.
Example

Common base
transistor

This generator sets a
current through its
terminals that
depends on the
potencial difference
existing between
them.