Current conveyor all-pass sections: brief review and novel solution

Area of Science:

• Analog electronics
• Filter design
• Active element synthesis

Background:

• All-pass filters are crucial analog functions.
• Existing current conveyor types have limitations.
• A comprehensive review of recent all-pass filter realizations is needed.

Purpose of the Study:

• To review all-pass filter realizations using current conveyors.
• To introduce a novel active element for improved performance.
• To present a new first-order all-pass filter section.

Main Methods:

• Literature review of current conveyor-based all-pass filters.
• Development and characterization of a new active element (EXCCII).
• Design and simulation of a first-order all-pass filter using EXCCII.

Main Results:

• Identified limitations of existing current conveyor types.
• Proposed a new active element: Extra-X second generation current conveyor (EXCCII).
• Demonstrated a novel first-order all-pass filter section using EXCCII, realizable with AD-844 IC.

Conclusions:

• The EXCCII offers a promising solution for all-pass filter design.
• The proposed filter section provides a viable alternative for analog circuit applications.
• Further research can build upon this work for advanced filter topologies.