Adder Using Op Amp. By electrical4u an op amp is an amplifier. As we have discussed in our earlier posts of an operational amplifier it is designed in such a way that it can perform mathematical operations on the input signals like addition subtraction integration derivation and many more.
Let us assume currents i1 and i2 are flowing through resistances r1 and r2 respectively. We can design an op amp circuit to combine number of input signals and to produce single output as a weighted sum of input signals. The output voltage v o can be obtained by using superposition theorem.
The input signals to be added are applied to the inverting input terminal of op amp.
To study op amp as adder and subtractor circuit aic practical an operational amplifier often op amp or opamp is a dc coupled high gain electronic voltage amplifier with a differential input and usually a single ended output. The output voltage v o can be obtained by using superposition theorem. The input signals to be added are applied to the inverting input terminal of op amp. To find output voltage v 01 due to v 1 alone make all other input voltages v 2 v 3 and v 4 equal to.
