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Three EMG signals are required to be summed. The first and second signal, EMG1 and EMG2, are required to be scaled by a factor of -4, and the third signal, EMG3, by a factor of -2. Design an Op-amp based circuit to produce the required output operation.

What is the definition of gain? What is the definition of perfect gain?

2. One of the earliest uses of operational amplifiers (OPAMPS) is to perform mathematical operations on analog signals. Of the two OPAMP circuits shown below, one of them is known as an analog differentiator while the other an analog integrator. Analyse these circuits to discover why by finding an equation for their output VOUT in terms of their time-varying input VIN(t). (You may assume the OPAMPS are ideal.) VIN(t) RF Circuit A ☑ RF VOUT VIN(t) Circuit B VOUT