Opamp Current Summing Amplifier
the picture below shows us several current sources connected to the negativ input an opamp (ex.741)
we can calculate Vout as below
Therefore
If R1=R2=R3 (=R) we have
and the output voltage is proportional to the sum of the input voltages.
For only one input and a constant reference voltage
where the second term represents an offset voltage. This provides a convenient method for obtaining an output signal with any required voltage offset.
Keywords :
Opamp,
Op-amp,
Amplifiers,
Current,
Summing,
Amplifier,
Amplificator,
Amplification,
Info,
Tutorial
Writer : delon |
18 Apr 2006 Tue
| 10.071 Views