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Improvement of PSRR Characteristics of a SCF Using a Leapfrog Filter and an Equal Level Diagram Design
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/10/01
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Analog Signal Processing
PSRR, SCF, leapfrog, frequency characteristics, voice-band PCM CODEC,
Full Text: PDF(220.3KB)>>
Power supply rejection ratio (PSRR) characteristics of a switched capacitor filter (SCF) is improved when using an equal level diagram design of a leapfrog type filter. By using this design method, it is shown that PSRR of a SCF measured is improved about 20 dB.