Consider the MOSFET amplifier circuit shown below:
It is known that the transconductance parameter, \({\beta _n} = {\mu _n}{C_{ox}}\frac{W}{L} = 12.5\frac{{\mu A}}{{{V^2}}}\) and the channel length modulation parameter is 0.1 V-1. DC drain current ID = 1 μA. The value of Rin (in MΩ) is _____
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