Consider the CMOS differential input stage shown in Fig. 9.20, where supplies a bias current of , resulting in and Find the equivalent input noise spectral density associated with thermal noise. If...

Consider the CMOS differential input stage shown in Fig. 9.20, where supplies a bias current of , resulting in and Find the equivalent input noise spectral density associated with thermal noise. If the bias current is doubled, how does the equivalent input noise density change?