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Design of a Constant Transconductance Rail-To-Rail CMOS OPAMP with only One Differential Pair and Switched Level Shifters


Pooja Kushwah , Swami vivekanand college of engineering, Indore (M.P.); Vijay Sharma, Swami vivekanand college of engineering, Indore (M.P.)


Rail-to-Rail CMOS CCII, CMOS Technology


Low power analog circuits has become very important factor in modern circuit design. At low voltage the threshold voltage changes and show nonlinear variation and transistor operates in moderate inversion region. To overcome this problem constant trans-conductance is required. A second generation current conveyor CCII can reduce this problem. A Rail-to-rail CCII has been shown in this paper. CCII has been designed I two stages first stage is trans-conductance Op-amp and the second stage is current mixer followed by CMOS inverter at the output stage that operates as class AB. It provides Rail-to-Rail output. The CCII has 72 dB of gain and 660 of phase margin and UGB of 1.54MHz.

Other Details

Paper ID: IJSRDV5I80151
Published in: Volume : 5, Issue : 8
Publication Date: 01/11/2017
Page(s): 159-162

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