(a)
Interpretation:
An expression for an output voltage in terms of the resistances and three input voltages and is to be determined for the given circuit.
Concept introduction:
Based on the given circuit, we have two inverting summing amplifier configuration.
Generally, the output of an inverting summing amplifier for two inputs is given by,
We can use this general expression to obtain the specific output voltage at first stage and then using which the final output can be found.
(b)
Interpretation:
The mathematical operation which is performed by the circuit for the given values is to be determined.
Concept introduction:
The expression for the output has been obtained in part (a). In this expression, we need to substitute the values of the resistances so that the nature of operation performed by the circuit can be analyzed.
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PRINCIPLES OF INSTRUMENTAL ANALYSIS
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