McqMate
| Q. |
What should be CMRR of preamplifier upto 5 Khz? |
| A. | 10 dB |
| B. | 30 dB |
| C. | 90 dB |
| D. | greater than 90 dB |
| Answer» D. greater than 90 dB | |
| Explanation: The common-mode rejection should be greater than 90 dB up to 5 kHz. A calibrating square wave signal of 100 mV (peak-to-peak) at a frequency of 100 Hz is usually available. The main amplifier has controls for gain adjustment from 5 mV/div to 10 mV/div for selecting the sensitivity most appropriate to the incoming signal from the patient. | |
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