Synergy at work between continuous-time and sampled-data analog filters for integrated high-frequency,high-Q signal processing |
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Authors: | J E Franca R Schaumann |
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Affiliation: | (1) Department of Electrical and Computer Engineering, Instituto Superior Técnico, 1096 Lisboa Codex, Portugal;(2) Department of Electrical Engineering, Portland State University, P.O. Box 751, 97202-0751 Portland, OR, USA |
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Abstract: | High-frequency, high-Q-factor analog signal processing systems based on sampled-data switched-capacitor circuitry and continuous-time filters are proposed in a way that tends to combine the most advantageous aspects of both techniques. The new systems are applicable to video, radio and radar filtering functions and have unparalleled potential for producing more accurate, economical, and repeatable results than have been achieved with other methods.1.F
s
is the sampling frequency and M and L are integers.2. A similar model could easily be established for the complementary frequency upconversion operation following the SC filter and involving the SC interpolator and the output CT filter, but this will not be considered here for conciseness. |
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Keywords: | Integrated filters continuous-time filters sampled-data filters high frequency filtering |
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