3. (4 marks) In a certain instrumentation amplifier, the input signal consists of a 20 mV differential signal and a 5 V interfering common mode signal. It is desired that the contribution to the output signal from the common mode signal vicm is at least 60 dB lower than the contribution from the differential signal vid. Find the CMRR for this amplifier.
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Calculate the amplitude of the 20 mV differential signal and the 5 V interfering common mode signal. Show more…
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Q2: Calculate the CMRR in dB if a differential amplifier has an output of 10 volts with a differential input of 10 mV and an output of 0.5 mV with a common mode input of 10 mV.
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1. Determine the CMRR and express it in decibels for an amplifier with a differential voltage of 8500 and a common-mode gain of 0.25. 2. Determine the CMRR and express it in dB for an op-amp with an open-loop differential voltage gain of 85,000 and a common-mode gain of 0.25. 3. When a pulse is applied to an op-amp, the output voltage goes from 8 V to +7 V in 0.75 us. What is the slew rate? 4. Differentiate the working principle of differential and operational amplifiers and their operation. Discuss your answer in at least 5 sentences.
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