A microphone has an unloaded voltage vs 20 mV, as shown in Figure DP 6-5a. An op amp is
Chapter 6, Problem DP6-5(choose chapter or problem)
DP 6-5 A microphone has an unloaded voltage \(v_{\mathrm{s}}=20 \mathrm{mV}\), as shown in Figure DP 6-5a. An op amp is available as shown in Figure DP 6-5b. It is desired to provide an output voltage of 4 V. Design an inverting circuit and a non inverting circuit and contrast the input resistance at terminals x-y seen by the microphone. Which configuration would you recommend to achieve good performance in spite of changes in the microphone resistance \(R_{\mathrm{s}}\)?
Hint: We plan to connect terminal a to terminal x and terminal b to terminal y or vice versa.
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