Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids
Class D amplifiers are conventionally designed by feeding the modulated pulse signal at the output stage while leaving the low pass filter as an open-loop structure. But it’s demonstrated that the low pass filter due to the lack of compensation, contributes a significant amount of non-linearity and...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2010
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| Online Access: | http://hdl.handle.net/10356/40892 |
| _version_ | 1811696018718195712 |
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| author | Li, Qi. |
| author2 | Chang Joseph Sylvester |
| author_facet | Chang Joseph Sylvester Li, Qi. |
| author_sort | Li, Qi. |
| collection | NTU |
| description | Class D amplifiers are conventionally designed by feeding the modulated pulse signal at the output stage while leaving the low pass filter as an open-loop structure. But it’s demonstrated that the low pass filter due to the lack of compensation, contributes a significant amount of non-linearity and noise.
In this report, we discuss and study a high fidelity Class D amplifier based on a self-oscillating approach with a single loop complete feedback network (feedback from the low-pass filter instead of the output stage).
After that, a breadboard hardware demonstration of the mentioned self-oscillating class D amplifier circuit and its dual-rail configuration (two resemblant circuits sharing inputs, reference voltage and supply voltage) is also implemented and the observation of the switching frequency versus output performance and the interference phenomenon is discussed. |
| first_indexed | 2024-10-01T07:32:42Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/40892 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:32:42Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/408922023-07-07T19:20:05Z Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids Li, Qi. Chang Joseph Sylvester School of Electrical and Electronic Engineering Centre for Integrated Circuits and Systems DRNTU::Engineering::Electrical and electronic engineering::Control and instrumentation::Medical electronics Class D amplifiers are conventionally designed by feeding the modulated pulse signal at the output stage while leaving the low pass filter as an open-loop structure. But it’s demonstrated that the low pass filter due to the lack of compensation, contributes a significant amount of non-linearity and noise. In this report, we discuss and study a high fidelity Class D amplifier based on a self-oscillating approach with a single loop complete feedback network (feedback from the low-pass filter instead of the output stage). After that, a breadboard hardware demonstration of the mentioned self-oscillating class D amplifier circuit and its dual-rail configuration (two resemblant circuits sharing inputs, reference voltage and supply voltage) is also implemented and the observation of the switching frequency versus output performance and the interference phenomenon is discussed. Bachelor of Engineering 2010-06-23T07:32:50Z 2010-06-23T07:32:50Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/40892 en Nanyang Technological University 67 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Control and instrumentation::Medical electronics Li, Qi. Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title | Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title_full | Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title_fullStr | Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title_full_unstemmed | Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title_short | Study and hardware demonstration of the self-oscillating class D amplifier circuit for hearing aids |
| title_sort | study and hardware demonstration of the self oscillating class d amplifier circuit for hearing aids |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Control and instrumentation::Medical electronics |
| url | http://hdl.handle.net/10356/40892 |
| work_keys_str_mv | AT liqi studyandhardwaredemonstrationoftheselfoscillatingclassdamplifiercircuitforhearingaids |