单项选择题
When a given op-amp has a common-mode input of 10 V, the output of the device is 10 V. When the device has a differential input of 2 mV, the output of the device is 10 V. What is the CMPR of the device?
A.5 : 1
B.5000 : 1
C.1000 : 1
D.5,000,000 : 1