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High Output Impedance Current-Mode Universal First-Order Filter With Three Inputs Using One DDCC

[ Vol. 12 , Issue. 3 ]


Jiun-Wei Horng*   Pages 242 - 246 ( 5 )


Background: A current-mode universal first-order filter with three input terminals and one output terminal is presented.

Methods: The proposed circuit uses one differential difference current conveyor (DDCC), one grounded capacitor and two resistors.

Results: This circuit offers the following advantageous features: high output impedance, employing only one active component, using a grounded capacitor, the versatility to synthesize any type of first-order filter transfer functions.

Conclusion: Each standard first-order filter function can be obtained by using only one current input signal from the proposed circuit.


Active filter, current conveyor, current-mode, first-order, frequency response, universal filter.


Department of Electronic Engineering, Chung Yuan Christian University, Chung Li District, Taoyuan City, 32023

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