Title :
Using the weak inversion region to optimize input stage design of CMOS op amps
Author :
Comer, David J. ; Comer, Donald T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA
fDate :
1/1/2004 12:00:00 AM
Abstract :
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.
Keywords :
MOS analogue integrated circuits; amplifiers; CMOS op amps; MOS devices; amplifier performance optimization; compensation; input stage optimization; low-distortion; voltage gain; weak inversion region; Bandwidth; Circuits; Design optimization; Frequency; Guidelines; Helium; MOS capacitors; MOS devices; Operational amplifiers; Threshold voltage;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2003.821517
