Operation of MOS devices in the strong, moderate, and weak inversion regions is considered. The advantages of designing the input differential stage of a CMOS op amp to operate in the weak or moderate inversion region are presented. These advantages include higher voltage gain, less distortion, and ease of compensation. Specific design guidelines are presented to optimize amplifier performance. Simulations that demonstrate the expected improvements are given.
Published in:
Circuits and Systems II: Express Briefs, IEEE Transactions on
(Volume:51
,
Issue:
1
)
Date of Publication: Jan 2004