Design of Wide-Band, Low Noise, Low Power OPAMP using Negative Capacitance Circuit and a Novel Method for Reducing Power Consumption and Die Area of Active RC Filters

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Rasekh, Amir Hossein | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44457 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Sharif Bakhtiar, Mehrdad
Abstract:
Gain bandwidth products of Operational Amplifiers are dependent to power consumption. In this thesis we introduce negative capacitance circuit as a candidate to improve GBWs of OPAMPs in constant power, or achieve the requested GBW in lower power consumption. First we characterize negative capacitance circuit and introduce a model for that. Then we see how pole-zero placement will change, when we add negative capacitance circuit to a circuit node. As an application we use this circuit in Folded Cascode and Current mirror OPAMPs and give design guideline for this topologies. A three stages and a one stage OPAMP is designed in 0.18um CMOS, for the application of negative capacitance circuit. At last a method is introduced to reduce Power Consumption and die area of integrated Active RC filters. A Low pass Active RC filter for Bluetooth standard is proposed in 0.18um CMOS process to prove the method
Keywords:
Wideband ; Operational Amplifiers ; Active Filter ; Negative Capacitance Circuit ; Operational Amplifiers ; Wideband Amplifier ; Low Power System

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