Low Input and High Output Impedances Current-Mode First-Order Allpass Filter Employing Grounded Passive Components


A current-mode low input and high output impedances first-order allpass filter using two multiple output second-generation current conveyors (MOCCIIs), one grounded capacitor and one grounded resistor is presented. The suggested filter uses a canonical number of passive components without requiring any component matching condition. The frequency responses simulation results of the proposed filter confirm the theoretical analysis.

Share and Cite:

J. Horng, C. Hou, Y. Guo, C. Hsu, D. Yang and M. Ho, "Low Input and High Output Impedances Current-Mode First-Order Allpass Filter Employing Grounded Passive Components," Circuits and Systems, Vol. 3 No. 2, 2012, pp. 176-179. doi: 10.4236/cs.2012.32023.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] C. Toumazou, F. J. Lidgey and D. G. Haigh, “Analog IC Design: The Current-Mode Approach,” Peter Peregrinus, London, 1990.
[2] J. W. Horng, Z. R. Wang and C. C. Liu, “Voltage-Mode Lowpass, Bandpass and Notch Filters Using Three PlusType CCIIs,” Circuits and Systems, Vol. 2, No. 1, 2011, pp. 34-37. doi:10.4236/cs.2011.21006
[3] A. M. Soliman, “Current Mode Universal Filter,” Electronics Letters, Vol. 31, No. 17, 1995, pp. 1420-1421. doi:10.1049/el:19951018
[4] J. W. Horng, “Current-Mode and Transimpedance-Mode Universal Biquadratic Filter Using Multiple Outputs CCIIs,” Indian Journal of Engineering & Materials Sciences, Vol. 17, No. 3, 2010, pp. 169-174.
[5] M. Bhushan and R. W. Newcomb, “Grounding of Capacitors in Integrated Circuits,” Electronic Letters, Vol. 3, No. 4, 1967, pp. 148-149. doi:10.1049/el:19670114
[6] S. Minaei and E. Yuce, “All-Grounded Passive Elements Voltage-Mode DVCC-Based Universal Filters,” Circuits, Systems, and Signal Processing, Vol. 29, No. 2, 2010, pp. 295-309. doi:10.1007/s00034-009-9136-1
[7] J. W. Horng, C. L. Hou, C. M. Chang, W. Y. Chung, H. L. Liu and C. T. Lin, “High Output Impedance Current-Mode First-Order Allpass Networks with Four Grounded Components and Two CCIIs,” International Journal of Electronics, Vol. 93, No. 9, 2006, pp. 613-621. doi:10.1080/00207210600711580
[8] B. Metin, K. Pal and O. Ciceloglu, “All-Pass Filter for Rich Cascadability Options Easy IC Implementation and Tenability,” International Journal of Electronics, Vol. 94, No. 11, 2007, pp. 1037-1045. doi:10.1080/00207210701763589
[9] I. A. Khan, P. Beg and M. T. Ahmed, “First-Order Current Mode Filters and Multiphase Sinusoidal Oscillators Using CMOS MOCCIIs,” The Arabian Journal for Science and Engineering, Vol. 32, No. 2C, 2007, pp. 119126.
[10] S. Maheshwari, “Novel Cascadable Current-Mode First Order All-Pass Sections,” International Journal of Electronics, Vol. 94, No. 11, 2007, pp. 995-1003. doi:10.1080/00207210701751238
[11] S. M. Al-Shahrani, “CMOS Wideband Auto-Tuning Phase Shifter Circuit,” Electronics Letters, Vol. 43, No. 15, 2007, pp. 14-15. doi:10.1049/el:20070284
[12] D. Biolek and V. Biolkova, “Allpass Filter Employing One Grounded Capacitor and One Active Element,” Electronics Letters, Vol. 45, No. 16, 2009, pp. 807-808. doi:10.1049/el.2009.0575
[13] J. W. Horng, “High Output Impedance Current-Mode Universal Biquadratic Filters with Five Inputs Using Multi-Output CCIIs,” Microelectronics Journal, Vol. 42, No. 5, 2011, pp. 693-700. doi:10.1016/j.mejo.2011.02.007
[14] S. Minaei and M. A. Ibrahim, “General Configuration for Realizing Current-Mode First-Order All-Pass Filter Using DVCC,” International Journal of Electronics, Vol. 92, No. 6, 2005, pp. 347-356. doi:10.1080/00207210412331334798
[15] A. Toker, S. Ozoguz, O. Cicekoglu and C. Acar, “Current-Mode All-Pass Filters Using Current Differencing Buffered Amplifier and a New High-Q Bandpass Filter Configuration,” IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, Vol. 47, No. 9, 2000, pp. 949-954.
[16] S. Kilinc and U. Cam, “Current-Mode First-Order AllPass Filter Employing Single Current Operational Amplifier,” Analog Integrated Circuits and Signal Processing, Vol. 41, No. 1, 2004, pp. 47-53. doi:10.1023/B:ALOG.0000038282.60137.5f
[17] S. Maheshwari, “A New Current-Mode Current-Controlled All-Pass Section,” Journal of Circuits, Systems, and Computers, Vol. 16, No. 2, 2007, pp. 181-189. doi:10.1142/S0218126607003599
[18] A. Lahiri and A. Chowdhury, “A Novel First-Order Current-Mode All-Pass Filter Using CDTA,” Radioengineering, Vol. 18, No. 3, 2009, pp. 300-305.
[19] E. Yuce, “Grounded Inductor Simulators with Improved Low-frequency Performances,” IEEE Transactions on Instrumentation and Measurement, Vol. 57, No. 5, 2008, pp. 1079-1084. doi:10.1109/TIM.2007.913822
[20] W. Surakampontorm, V. Riewruja, K. Kumwachara and K. Dejhan, “Accurate CMOS-Based Current Conveyors,” IEEE Transactions on Instrumentation and Measurement, Vol. 40, No. 4, 1991, pp. 699-702. doi:10.1109/19.85337

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.