1. A Third-Order Integrated Passive Switched-Capacitor Filter Obtained With a Continuous-Time Design Approach.
- Author
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Lulec, Sevil Zeynep, Johns, David A., and Liscidini, Antonio
- Subjects
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CAPACITOR switching , *CONTINUOUS-time filters , *SWITCHED capacitor circuits , *POWER resources - Abstract
A third-order passive switched-capacitor low-pass filter is presented together with experimental results. The current input-voltage output filter structure realizes complex-conjugate poles although it is composed of switches and capacitors. The results are verified with measurements performed on the filter prototype integrated in a 0.13- $\mu \text{m}$ CMOS technology. The prototype has a cut-off frequency of 470 kHz, 150- $\mu \text{W}$ power consumption from 1.2-V power supply, 92-dB SFDR, and an active area of 0.06 mm2. The switch-capacitor filter was obtained using a continuous-time model that is also described here and is useful for design, analysis, and simulation of oversampled switched-capacitor circuits. The model is applicable to a variety of topologies including multi-phase passive switched-capacitor filters, switched-capacitor integrators, as well as switched-capacitor dc/dc converters. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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