Current-mode all-pass filters using current differencing buffered amplifier and a new high-Q bandpass filter configuration

A new configuration realizing first-order canonical current processing all- pass filters based on current differencing buffered amplifier, a recently i ntroduced active element, is proposed. Using this configuration, two types of first-order current-mode all-pass filters are derived. They employ only a single active element and a bare minimum number of passive components. No component-matching constrains are required. Because of the high performanc e of the current differencing buffered amplifier, they are suitable for wid eband applications. The derived filters are cascadable because of their hig h output impedances and they use fewer active and/or passive components com pared to their previously reported counterparts. As an application of the p roposed first-order all-pass networks, a new current-mode high-Q bandpass f ilter, which offers a number of advantages over its counterparts, is also g iven.