Abstract
This paper presents a novel method that is applied to realize the Linear Transformation (LT) Switched-Capacitor Filter (SCF). It adopts the Voltage Control Voltage Source (VCVS)equalized transformation to revise the original LC ladder filter and induce it into 16 basic sections and the extend the principle of the LT in order to fit active and 3 port networks and give out switched-capacitor circuits corresponding to the 16 basic sections, which can realize all four kinds of filters—LP, HP, BP, BS filters. Designed examples are given here. An Nth order filter only requires N amplifiers and the circuit is insensitive to parasitic capacitances. The experimental results of a 3rd order elliptic LP and a 6th order elliptic BP are given and agree with the theory.
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