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Draw a fully-differential folded-cascode OTA (Operational Transconductance Amplifier) with PMOS input differential stage and a CMFB loop back to the tail current source. You do not need to show any bias network. What would be the problem in using this circuit without a CMFB (common-mode feedback) loop? Suggest a real implementation of the common-mode sensing circuit. Mark another node where the CMFB loop could be fed back to.

Draw a fully-differential folded-cascode OTA (Operational Transconductance Amplifier) with PMOS input differential stage and a CMFB loop back to the tail current source. You do not need to show any bias network. What would be the problem in using this circuit without a CMFB (common-mode feedback) loop? Suggest a real implementation of the common-mode sensing circuit. Mark another node where the CMFB loop could be fed back to.

Power System Analysis and Design (MindTap Course List)
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.3P
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Draw a fully-differential folded-cascode OTA (Operational Transconductance Amplifier) with PMOS input differential stage and a CMFB loop back to the tail current source. You do not need to show any bias network. What would be the problem in using this circuit without a CMFB (common-mode feedback) loop? Suggest a real implementation of the common-mode sensing circuit. Mark another node where the CMFB loop could be fed back to.
Transcribed Image Text:Draw a fully-differential folded-cascode OTA (Operational Transconductance Amplifier) with PMOS input differential stage and a CMFB loop back to the tail current source. You do not need to show any bias network. What would be the problem in using this circuit without a CMFB (common-mode feedback) loop? Suggest a real implementation of the common-mode sensing circuit. Mark another node where the CMFB loop could be fed back to.
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