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![PDF] Supplementary First-Order All-Pass Filters with Two Grounded Passive Elements Using FDCCII | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/38fa19a8572dc64b8923a4619d47db400e1b97a5/2-Figure2-1.png "PDF] Supplementary First-Order All-Pass Filters with Two Grounded Passive Elements Using FDCCII | Semantic Scholar")