
Demystifying Switched-Capacitor Circuits
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together will not affect their own transfer functions [14], thereby enabling a
straightforward and easy-to-troubleshoot design. In practice, the cascade
confi guration is usually adopted to realize medium-to-high-order (3 ≤ L ≤ 12)
SCFs that provide a medium-to-high selectivity (1 ≤ Q ≤ 30).
However, when it comes to even higher-order and more stringent selectivity
requirements, the cascade SCF realizations are inappropriate because the resulting
high-order transfer functions typically have high-Q poles (i.e., poles that are located
very close to the unit circle in the z-plane). In effect, the value of ...