An interface or a signal conditioning circuit has a speci?c purpose: to bring the signal from the sensor up to the format which is compatible with the load device

An interface or a signal conditioning circuit has a speci?c purpose: to bring the signal from the sensor up to the format which is compatible with the load device. The input impedance characteristics is of importance. Suppose that for a stimulus signal E and the circuit's input voltage V as a function of frequency, f, may be expressed by E W + (mt): where fc = (2nRCT' is the comer ?'equency, (i.e., the frequency where the amplitude drops by 3 dB}, R and C are the resistive and capacitive components of the input impedance. Assume that 1% accuracy in the amplitude detection is required. a. Prove that the maximum stimulus signal ?'equency that can be processed by the circuit: ?lm : 0.14fc, or fr: 2 71511:". b. If the stimulus' highest frequency is 100 Hz, how much should you change the input impedance? V: