Electronically-Controlled Current-mode second order Sinusoidal Oscillators Using MO-OTAs and Grounded Capacitors

Data Ram Bhaskar, Kasim Karam Abdalla, Raj Senani

.

DOI: 10.4236/cs.2011.22011                

Abstract

Five new electronically-controllable second order current-mode sinusoidal oscillators using three mul-ti-output operational transconductance amplifiers (MO-OTAs) and two grounded capacitors (GC) have been presented. Simulation results are included to confirm the theoretical analysis based upon CMOS OTAs implementable in 0.5 µm technology.

Keywords

Oscillators, Analog Electronics, Current Mode Circuits, Operational Transconductance Amplifiers

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	T. Tsukutani, Y. Sumi and Y. Fukui, “Electronically Controlled Current-Mode Oscillators Using MO-OTAs and Grounded Capacitors,” Frequenz, Vol. 60, No. 11-12, 2006, pp. 220-223. doi:10.1515/FREQ.2006.60.11-12.220
[2]	W. Tangsrirat, “ Current Differencing Transconductance Amplifier-Based Current-Mode Four-Phase Quadrature Oscillator,” Indian Journal of Engineering and Material Sciences, Vol. 14, No. 4, 2007, pp. 289-294.
[3]	D. V. Kamat, P. V. A. Mohan and K. G. Prabhu, “ Novel First-Order and Second-Order Cur-rent-Mode Filters Using Multiple-Output Operational Amplifi-ers,” Circuits Syst Signal Process, Vol. 29, No. 3, 2010, pp. 553-576. doi:10.1007/s00034-010-9163-y
[4]	M. T. Abuel-ma’atti, “New Minimum Componet Elec- tronically Tunable OTA-C Sinusoidal Oscillators,” Elec- tronics Letters, Vol. 25, No. 17,1989, pp. 1114-1115. doi:10.1049/el:19890747
[5]	M. T. Abuelma’atti and M. H. Khan, “Grounded Capacitor Oscil-lators Using a Single Operationl Trans- conductance Amplifier,’’ Active and Passive Electronic Components, Vol. 19, No. 2, 1996, pp. 91-98.
[6]	Y. Tao and J. K. Fidler, “Generation of Second-Order Single-OTA RC Oscillators,” IEE Proceedings of Circuits Devices Systems, Vol. 145, No. 4, 1998, pp. 271-277. doi:10.1049/ip-cds:19981872
[7]	Y. Tao and J. K. Fidler, “Electronically Tunable Dual-OTA Second-Order Sinusoidal Oscillator/Filters with Non-interacting Controls: A Systematic Synthesis Approach,” IEEE Transactions on Circuits Systems I, Vol. 47, No. 2, 2000, pp. 117-129.
[8]	V. Singh, “Equivalent Forms of Dual-OTA RC Oscillators with Application to Grounded-Capacitor Osci- llators,” IEE Proceedings of Circuits Devices Systems, Vol. 153, No. 2, 2006, pp. 95-99. doi:10.1049/ip-cds:20050099
[9]	V. Singh, “Equivalent Forms of Single-Operational Transconductance Amplifier RC Oscillators with Appli- cation to Grounded-Capacitor Oscilla-tors,” IET Circuits Devices Systems, Vol. 4, No. 2, 2010, pp. 123-130. doi:10.1049/iet-cds.2009.0146
[10]	B. Bhushan and R. W. Newcomb, “Grounding of Capacitors in Integrated Cir-cuits,” Electronics Letters, Vol. 3, No. 4, 1967, pp.148-149. doi:10.1049/el:19670114
[11]	R. Senani, “Realization of a Class of Analog Signal Processing/Signal Generation Circuits: Novel Configura- tion Using Current-Feedback Op-Amps,” Frequenz, Vol. 52, No. 9-10, 1998, pp. 196-206. doi:10.1515/FREQ.1998.52.9-10.196
[12]	H. S. Malvar and M. Luettgen, “Temperature Compensa- tion of OTA-Based Filters and Multipliers,” Electronics Letters, Vol. 23, No. 17, 1987, pp. 890-891. doi:10.1049/el:19870629
[13]	W.-S. Chung, H.-W. Cha and K.-H. Kim, “Temperature- Stable VCO Based on Operational Transconductance Amplifiers,” Electronics Letters, Vol. 26, No. 22, 1990, pp. 1900-1901. doi:10.1049/el:19901223
[14]	C. A. Karybakas, C. Kosmato-poulos and T. Laopoulos, “Improved Temperature Compensa-tion of OTAs,” Ele- ctronics Letters, Vol. 28, No. 8, 1992, pp. 763-764. doi:10.1049/el:19920482
[15]	R. Senani, M. P. Tripathi, D. R. Bhaskar and A. K. Banerjee, “Systematic Generation of OTA-C Sinusoidal Oscillators,” Electronics Letters, Vol. 26, No. 18, 1990, pp. 1457-1459. doi:10.1049/el:19900935
[16]	D. R. Bhaskar, M. P. Tripathi and R. Senani, “A Class of Three-OTA-Two-Capacitor Oscillators with Non-interac- ting Controls,” International Journal of Electronics, Vol. 74, No. 3, 1993, pp. 459-463. doi:10.1080/00207219308925849
[17]	D. R. Bhaskar, M. P. Tripathi and R. Senani, “Systematic Derivation of All Possible Canonic OTA-C Sinusoidal Oscillators,” Journal of the Franklin Institute, Vol. 330, No. 5, 1993, pp. 885-903. doi:10.1016/0016-0032(93)90083-7
[18]	R. Senani, “New Electronically Tunable OTA-C Sinusoidal Oscillator,” Elec-tronics Letters, Vol. 25, No. 4, 1989, pp. 286-287. doi:10.1049/el:19890199
[19]	M. T. Abuelma’atti, “Two New Integrable Active-C OTA-Based Voltage (Current) Controlled Oscillators,” International Journal of Electronics, Vol. 66, No. 1, 1989, pp. 135-138. doi:10.1080/00207218908925369