Supplementary First-Order All-Pass Filters with Two Grounded Passive Elements Using FDCCII

Abstract

In this study, two novel first-order all-pass filters are proposed using only one grounded resistor and one grounded capacitor along with a fully differential current conveyor (FDCCII). There is no element-matching restriction. The presented all-pass filter circuits can be made electronically tunable due to the electronic resistors. Furthermore, the presented circuits enjoy high-input impedance for easy cascadability. The theoretical results are verified with SPICE simulations.

Keywords

• Analog filter
• all-pass filter
• cascadable filter
• high-Q band-pass filter
• grounded capacitor
• FDCCII
• MOSFET based resistors