Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/68063
Full metadata record
DC FieldValueLanguage
dc.contributor.authorLi, Yao-
dc.date.accessioned2016-05-24T04:10:51Z-
dc.date.available2016-05-24T04:10:51Z-
dc.date.issued2016-
dc.identifier.urihttp://hdl.handle.net/10356/68063-
dc.description.abstractPower supply rejection ratio (PSRR) is a crucial factor for audio amplifiers to ensure sound quality in portable devices. Improving PSRR becomes more challenging as power consumption and size of integrated chips (ICs) keep scaling down. In mobile phones, a Time Division Multiple Access (TDMA) noise of 217Hz is fed to the supply rails and creates a “buzz” sound. In order to attenuate 217Hz and hearing range (20-20kHz) supply noise, a high-PSRR, low-power and small-area power amplifier is required. In this project, a basic three-stage class AB amplifier to drive a 16Ω speaker load is used as the benchmark, which has a PSRR of 83.9dB at 217Hz and 44.5 dB at 20kHz. The proposed PSRR improvement is based on adding the LDO. he simulation results shows that the PSRR can be improved to 112.6dB at 217Hz and 73.9 dB at 20kHz. High frequency PSRR is further improved by the proposed LDO with increased output accuracy. The final PSRR achieved in this project is 124.1dB at 217Hz and 98.5dB at 20kHz with about 40dB improvement. The PSRR at low and medium frequency range has been analyzed in detail, whereas the performance at high frequency is discussed. Suggestions are made to resolve the drawbacks of the proposed LDO, like poor transient response and output swing reduction.en_US
dc.format.extent37 p.en_US
dc.language.isoenen_US
dc.rightsNanyang Technological University-
dc.subjectDRNTU::Engineeringen_US
dc.titleA PSRR-aware CMOS power amplifier for portable applicationsen_US
dc.typeFinal Year Project (FYP)en_US
dc.contributor.supervisorChan Pak Kwongen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.degreeBachelor of Engineeringen_US
item.fulltextWith Fulltext-
item.grantfulltextrestricted-
Appears in Collections:EEE Student Reports (FYP/IA/PA/PI)
Files in This Item:
File Description SizeFormat 
FYP_a2028_151.pdf
  Restricted Access
1.8 MBAdobe PDFView/Open

Page view(s)

187
Updated on Jul 1, 2022

Download(s)

15
Updated on Jul 1, 2022

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.