Voltage Divider
A Voltage Divider formed by two
resistors R1 and R2
The Output Voltage will always be a fraction of the
Input Voltage.
Vout = Vin * R1 / (R1 + R2)
Non
Inverting Amplifier
The
basic idea in this Amplifier will be the use of a
Negative feedback and hence will it be possible to
reverse the Voltage Divider.
Vout = (1 + R2/R1) * Vin
Inverting Amplifier
The
minus terminal (-) now used for both negative feedback
and for the input Voltage Vin.
The minus terminal also called virtual ground as it
given the same potential as the plus terminal (+) which
connected to the ground.
(This only if Vout NOT saturated)
Vout = - R2/R1 * Vin
