Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage

The objective of this project was to design a low-voltage, low-power, low-noise operational amplifier (op-amp) that is capable to provide an output drive of 10mA load current, and a rail-to-rail output and producing gain bandwidth product of more than 50MHz, in this project GF-55nm process technolog...

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Main Author: Ng, Chen Hui
Other Authors: Siek Liter
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/167789
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1677892023-07-07T15:43:21Z Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage Ng, Chen Hui Siek Liter School of Electrical and Electronic Engineering ELSIEK@ntu.edu.sg Engineering::Electrical and electronic engineering::Integrated circuits The objective of this project was to design a low-voltage, low-power, low-noise operational amplifier (op-amp) that is capable to provide an output drive of 10mA load current, and a rail-to-rail output and producing gain bandwidth product of more than 50MHz, in this project GF-55nm process technology was used with supply voltage of 1.8V. This project involves the design of a two-stage op-amp that consists of a folded cascode amplifier with a single ended output connected to the class AB output stage that uses translinear loop for biasing. To ensure the op-amp receives a constant bias voltage that will not be affected by process, temperature, and voltage supply variation, a constant transconductance (gm) biasing circuit with start-up circuitry was designed to provide reference voltage for the op-amp. The challenge in this project was to the design the folded cascode amplifier, as all the transistors must be in the saturation region and the design of the class AB output stage, this includes understanding the working principle in order to design the aspect ratio of the transistors in the translinear loop and ensuring the translinear loop was balanced. The op-amp designed in this project have achieved 86.663dB of open loop gain and 51.2643° of phase margin at unity gain bandwidth of 50.0093MHz. Bachelor of Engineering (Electrical and Electronic Engineering) 2023-06-05T01:00:53Z 2023-06-05T01:00:53Z 2023 Final Year Project (FYP) Ng, C. H. (2023). Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/167789 https://hdl.handle.net/10356/167789 en A2215-221 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering::Integrated circuits
spellingShingle Engineering::Electrical and electronic engineering::Integrated circuits
Ng, Chen Hui
Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
description The objective of this project was to design a low-voltage, low-power, low-noise operational amplifier (op-amp) that is capable to provide an output drive of 10mA load current, and a rail-to-rail output and producing gain bandwidth product of more than 50MHz, in this project GF-55nm process technology was used with supply voltage of 1.8V. This project involves the design of a two-stage op-amp that consists of a folded cascode amplifier with a single ended output connected to the class AB output stage that uses translinear loop for biasing. To ensure the op-amp receives a constant bias voltage that will not be affected by process, temperature, and voltage supply variation, a constant transconductance (gm) biasing circuit with start-up circuitry was designed to provide reference voltage for the op-amp. The challenge in this project was to the design the folded cascode amplifier, as all the transistors must be in the saturation region and the design of the class AB output stage, this includes understanding the working principle in order to design the aspect ratio of the transistors in the translinear loop and ensuring the translinear loop was balanced. The op-amp designed in this project have achieved 86.663dB of open loop gain and 51.2643° of phase margin at unity gain bandwidth of 50.0093MHz.
author2 Siek Liter
author_facet Siek Liter
Ng, Chen Hui
format Final Year Project
author Ng, Chen Hui
author_sort Ng, Chen Hui
title Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
title_short Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
title_full Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
title_fullStr Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
title_full_unstemmed Design of low-voltage low-power low-noise folded-cascode CMOS op-amp with class AB output stage
title_sort design of low-voltage low-power low-noise folded-cascode cmos op-amp with class ab output stage
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/167789
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