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A Novel Q-Tuning Scheme for High-Q Continuous-Time Gm-C Filters

A novel on chip automatic tuning circuit for Gm ¡V C continuous time filter is presented. The circuit is composed of an integrator, a frequency tuning circuit, and a Q tuning circuit. A 4th order Chebyshev low pass filter is also designed with the tuning circuitry. All circuits are designed by using the parameters of TSMC 0.25um process. The power supplies are ¡Ó2.5V, and the cutoff frequency is 10MHz. The main LPF exhibits passband ripple below 4dB, and stopband attenuation over 70dB. The equilibrium time for tuning circuits is less than 3£gseconds.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0718102-142558
Date18 July 2002
CreatorsChen, Yung-Tai
ContributorsYao-Tsung Tsai, Shyh-Jye Jou, Jyi-Tsong Lin, Chia-Hsiung Kao, Jinn-Shyan Wang
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageEnglish
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0718102-142558
Rightsoff_campus_withheld, Copyright information available at source archive

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