Table 1: Comparison of various current-mode all-pass filters.

ReferencesNo. of active elementsSingle active elementNo. of resistors and capacitorsAll-grounded passive elementsLow input impedanceHigh output impedanceComponent matching constraint

Higashimura and Fukui [2]1-CCIIYes4NoNoYesYes
Higashimura [5]1-FTFNYes3NoNoNoYes
Toker et al. [9]1-CDBAYes2NoNoYesNo
Maheshwari and Khan [6]1-CCIIIYes2NoNoNoNo
Kilinç and Çam [10] 1-COAYes2NoNoYesNo
Minaei and Ibrahim [7]1-DVCCYes3NoNoYesYes
Khan et al. [3]2-MOCCIINo2YesNoYesNo
Maheshwari [8]1-DVCCYes2YesNoYesNo
Minaei and Yuce [4]2-DOCCIINo2YesYesYesNo
Minaei and Yuce [11]1-DXCCIIYes4YesNoYesYes
Beg et al. [12]1-DX-MOCCIIYes4YesNoYesYes
Proposed Circuit1-DX-MOCCIIYes2YesYesYesNo