Hung-Chun Chien This email address is being protected from spambots. You need JavaScript enabled to view it.1

1Department of Electronic Engineering, Jinwen University of Science and Technology, New Taipei City, Taiwan 231, R.O.C.


Received: May 15, 2013
Accepted: December 1, 2014
Publication Date: December 1, 2014

Download Citation: ||  


This paper proposes a novel sinusoidal oscillator using a current differencing transconductance amplifier(CDTA) and four passive components. The proposed oscillator provides independent control of the oscillation frequency by using a resistor without disturbing the oscillation condition, and exhibits desirable active and passive sensitivities. This study proposes an improved topology using a current-controlled current differencing transconductance amplifier (CCCDTA) instead of a CDTA, which features independent control and an electronic tunable property for the oscillation condition and oscillation frequency, and reduces the number of required passive components. Both of the proposed circuits are mixed-mode sinusoidal oscillators. A prototype circuit was built using commercial integrated circuits and discrete components to execute experimental tests. The HSPICE circuit simulations and experimental results were consistent with the theoretical analysis.

Keywords: Active RC Circuit, Current Differencing Transconductance Amplifier, Current-Controlled Current Differencing Transconductance Amplifier, Sinusoidal Oscillator


  1. [1] Bhattacharyya, B. B. and Darkani, M. T., “A Unified Approach to Realization of Canonic RC-Active, Single as well as Variable, Frequency Oscillators Using Operational Amplifiers,” Journal of Franklin Inst., Vol. 317, No. 6, pp. 413419 (1984). doi: 10.1016/ 0016-0032(84)90025-5
  2. [2] Gonzalez, G., Foundations of Oscillator Circuit Design, Artech House Publishers (2007).
  3. [3] Smith, K. C. and Sedra, A. S., “The Current Conveyor: A New Circuit Building Block,” Proc. IEEE, pp. 13681369 (1968). doi: 10.1109/PROC.1968.6591
  4. [4] Toumazou, C., Lidegy, F. J. and Haigh, D., Analog IC Design: The Current-Mode Approach, Peter Peregrinus Press, U.K. (1990). doi: 10.1049/PBCS002E
  5. [5] Lo, Y. K., Chien, H. C. and Chiu H. J., “Tunable Waveform Generators Using Single Dual-Current Output OTAs,” J. Circuits Syst. Comput, Vol. 17, No. 6, pp. 11931202 (2008). doi: 10.1142/S0218126609005393
  6. [6] Maheshwari, S. and Khan, I. A., “Novel Voltage-Mode Universal Filter Using Only Two CDBAs,” J. Circuits Syst. Comput, Vol. 14, No. 1, pp. 159164 (2005). doi: 10.1142/S0218126605002118
  7. [7] Sagbas, M. and Koksal, M., “Realization of a General Resistorless Active Biquad Using CBTA,” J. Circuits Syst. Comput, Vol. 21, No. 1 (2012). doi: 10.1142/ S0218126612500132
  8. [8] Mohan, J., Maheshwari, S. and Khan, I. A., “MixedMode Quadrature Oscillators Using Single FDCCII,” Journal of Active and Passive Electronic Devices, Vol. 2, No. 3, pp. 227234 (2007).
  9. [9] Liao, W. B. and Gu, J. C., “SIMO Type Universal Mixed-Mode Biquadratic Filter,” Indian Journal of Engineering and Material Sciences, Vol. 18, No. 6, pp. 443448 (2011).
  10. [10] Pandy, N. and Kumar, P., “Realization of Resistorless Wave Active Filter Using Differential Voltage Current Controlled Conveyor Transconductance Amplifier,” Radioengineering, Vol. 20, No. 4, pp. 911916 (2011). doi: 10.1109/MSPCT.2011.6150446
  11. [11] Chien, H. C. and Lo, Y. K., “Design and Implementation of Monostable Multivibrators Employing Differential Voltage Current Conveyors,” Microelectronic Journal, Vol. 42, No. 10, pp. 11071115 (2011). doi: 10.1016/j.mejo.2011.07.005
  12. [12] Li, Y. A., “A Series of New Circuits Based on CFTAs,” AEU-International Journal of Electronics and Communications, Vol. 66, No. 7, pp. 5875925 (2012). doi: 10.1016/j.aeue.2011.11.011
  13. [13] Celma, S., Martinez, P. A. and Carlosena, A., “Minimal Realization for Single Resistance Controlled Sinusoidal Oscillator Using Single CCII,” Electron Lett, Vol. 28, No. 5, pp. 443444 (1992). doi: 10.1049/ el:19920800
  14. [14] Liu, S. I., “Single-Resistance-Controlled Sinusoidal Oscillator Using Two FTFNs,” Electron Lett, Vol. 33, No. 14, pp. 11851186 (1997). doi: 10.1049/el: 19970833
  15. [15] Ozcan, S., Toker, A., Acar, C., Huntman, H. and Cicekoglu, O., “Single Resistance-Controlled Sinusoidal Oscillators Employing Current Differencing Buffered Amplifier,” Microelectronics Journal, Vol. 31, No. 3, pp. 169174 (2000). doi: 10.1016/S0026-2692 (99)00113-5
  16. [16] Cam, U., “A Novel Single-Resistance-Controlled Sinusoidal Oscillator Employing Single Operational Transresistance Amplifier,” Analog Integrated Circuits and Signal Processing, Vol. 32, No. 2, pp. 183 186 (2002).
  17. [17] Gupta, S. S. and Senani, R., “New Single Resistance Controlled Oscillators Employing a Reduced Number of Unity-Gain Cells,” IEICE Electronics Express, Vol. 1, No. 16, pp. 507512 (2004). doi: 10.1587/elex. 1.507
  18. [18] Biolek, D., “CDTA-Building Block for Current-Mode Analog Signal Processing,” Proc. Int. Conf. ECCTD’03, pp. 397400 (2003).
  19. [19] Tangsrirat, W., Pukkalanun, T. and Surakampontorn, W., “Resistorless Realization of Current-Mode FirstOrder Allpass Filter Using Current Differencing Transconductance Amplifiers,” Microelectronic Journal, Vol. 41, No. 23, pp. 178183 (2010). doi: 10.1016/ j.mejo.2010.02.001
  20. [20] Tangsrirat, W., “Current Differencing Transconductance Amplifier-Based Current-Mode Four-Phase Quadrature Oscillator,” Indian J. Eng. Mater. Sci., Vol. 14, No. 4, pp. 289294 (2007). doi: 10.1142/ S0218126611007190
  21. [21] Tangsrirat, W., Tanjaroen, W. and Pukkalanun, T., “Current-Mode Multiphase Sinusoidal Oscillator Using CDTA-Based Allpass Sections,” AEU-International Journal of Electronics and Communications, Vol. 63, No. 7, pp. 616622 (2006). doi: 10.1016/ j.aeue.2008.05.001
  22. [22] Keskin, A. U. and Biolek, D., “Current Mode Quadrature Oscillator Using Current Differencing Transconductance Amplifiers (CDTA),” IET Circuits Devices Systems, Vol. 153, No. 3, pp. 214218 (2006). doi: 10.1049/ip-cds:20050304
  23. [23] Prasad, D., Bhaskar, D. R. and Singh, A. K., “Realisation of Single-Resistance-Controlled Sinusoidal Oscillator: A New Application of the CDTA,” WSEAS Transactions on Electronics, Vol. 5, No. 6, pp. 257 259 (2008).
  24. [24] Biolek, D., Keskin, A. U. and Biolkova, V., “Grounded Capacitor Current Mode Single Resistance-Controlled Oscillator Using Single Modified Current Differencing Transconductance Amplifier,” IET Circuits Devices Systems, Vol. 4, No. 6, pp. 496502 (2010). doi: 10.1049/iet-cds.2009.0330
  25. [25] Jaikla, W. and Siripruchyanun, M., “Current Controlled Current Differencing Transconductance Amplifier (CCCDTA): A New Building Block and Its Applications,” Proc. of ECTI Conference 2006, pp. 348 351 (2006). doi: 10.1109/ISCIT.2007.4392014
  26. [26] Frey, D. R., “Log-Domain Filtering: An Approach to Current-Mode Filtering,” IET Circuits Devices Systems, Vol. 140, No. 6, pp. 406416 (1993). doi: 10.1049/ip-g-2.1993.0066
  27. [27] Analog Devices AD844AN data sheet.
  28. [28] National Semiconductor LM13600 data sheet.