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Design Methodology of a Capacitor for a Switched Capacitor Filter Accurate to a Capacitance Ratio and Insensitive to a Process Deviation
Katsuhiro FURUKAWA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E85-A
No.5
pp.1172-1175 Publication Date: 2002/05/01 Online ISSN:
DOI: Print ISSN: 0916-8508 Type of Manuscript: LETTER Category: Analog Signal Processing Keyword: SCF, capacitor, sensitivity, deviation, leapfrog filter,
Full Text: PDF>>
Summary:
This letter proposes a design methodology of a capacitor for a switched capacitor filter. The capacitor design method makes the capacitor accurate to the capacitance ratio and insensitive to the process deviation. The SCF designed is used for the PCM CODEC filter and the deviation of the frequency characteristic is below 0.05 dB for a process deviation 0.5 µm in 5 µm CMOS process.
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