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Thermal and flicker noise analysis in sample and hold circuit / Balamurali Maniam

Thermal and flicker noise analysis in sample and hold circuit_Balamurali Maniam_E3_2015_MYMY
Dalam aplikasi frekuensi rendah, hingar menjadi isu apabila saiz MOS dikurangkan. Oleh itu, hingar kerlipan dan hingar haba adalah salah satu isu yang terdapat dalam aplikasi frekuensi rendah . Dalam projek ini, hingar kerlipan dan hingar haba diukur pada litar sampel-dan-pegang, yang direka berdasarkan sepenuhnya dengan litar Cascode Pengamiran Sepenuh dengan Mod Suapbalik. Analysis hingar haba dan hingar kerlipan juga dijalankan dengan mengubah nilai kapasitor dan saiz transistor dalam litar sampel-dan-pegang. Dalam analisis hingar haba, SNR maksimum yang diukur adalah -120.28dB dengan 0.642uV/√Hz hingar haba masuk dan saiz transistor yang digunakan pada NMOS adalah 8μm . Selain itu, SNR maksimum yang diperolehi bagi hingar kerlipan adalah -83.27dB untuk hingar masuk 1uA dengan kapasitor nilai 0.5pF yang diukur pada frekuensi 1Hz dalam litar sampeldan tegang. _______________________________________________________________________ In low-frequency applications, noise is becoming more of an issue as the MOS size reduced. Therefore, the flicker noise and thermal noise are one of the issues found in low-frequency applications. In this work, the thermal noise and flicker noise are modelled and measured on the sample-and-hold circuit, based on Fully Differential Folded Cascode with Common Mode Feedback. The thermal noise analysis and flicker noise analysis are performed by varying the capacitance value and transistor sizes in the sample-and-hold circuit. In thermal noise analysis, the maximum output SNR measured is -120.28dB with 0.642uV/√Hz input thermal noise and transistor size for NMOS is set to 8μm. The maximum output SNR obtained for flicker noise is -83.27dB for 1uA input noise with low capacitance value 0.5pF and is measured at 1Hz frequency in sample-and-hold circuit.
Contributor(s):
Balamurali Maniam - Author
Primary Item Type:
Thesis
Identifiers:
Accession Number : 875008846
Language:
English
Subject Keywords:
capacitance; MOS; flicker
Sponsor - Description:
Pusat Pengajian Kejuruteraan Elektrik & Elektronik -
First presented to the public:
8/1/2015
Original Publication Date:
8/10/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 92
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-10 15:51:17.337
Submitter:
Mohamed Yunus Yusof

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