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Who can help me to analysis this AMP?

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leonken

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The architecture of amplifier is from
Op-amps and startup circuits for CMOS bandgap references with near 1-V supply
Boni, A.;
Solid-State Circuits, IEEE Journal of
Volume 37, Issue 10, Oct. 2002 Page(s):1339 - 1343
Digital Object Identifier 10.1109/JSSC.2002.803055

Summary: The design of bandgap-based voltage references in digital CMOS raises several design difficulties, as the supply voltage is lower than the silicon bandgap in electron volts, i.e., 1.2 V. A current-mode architecture is used in order to address the mai.....

The questions are:
1. How to realize the common mode feedback by using m1, m2, m0a and m0b in the input stage.
2. The m1, m2 m0a and m0b operate in weak inversion. How to achieve 60 dB DC gain of such amplifier?
3. Does m5 and m6 operate in weak inversion too, or in saturation region?
Thank you!!
 

leonken

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How to achieve high DC gain using such amplifier?
 

electronrancher

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oh no posting homework, please! more important than your grade in the class is the ability to research an unknown topic, and obtain the information you need.


your hint is search google for "Transconductance in weak inversion"
 

pillar_chen

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Please reference the Allen's book "CMOS analog circuit design"
 

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