This paper presents a new single-resistance-controlled sinusoidal oscillator (SRCO). The proposed oscillator employs only one voltage differencing differential input buffered amplifier (VD-DIBA), two resistors, and two grounded capacitors. The proposed configuration offers the following advantageous features: (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, and (iii) a very good frequency stability. The validity of the proposed SRCO has been established by SPICE simulations using 0.35？μm MIETEC technology. 1. Introduction Realisation of oscillators and active filters has become important research area in analog circuit design. Recently, various modern active building blocks have been introduced in [1], and VD-DIBA is one of them which is emerging as a very flexible and versatile building block for analog signal processing and has been used earlier for realizing a number of functions. Single-resistance-controlled sinusoidal oscillators (SRCOs) play an important role in control systems, signal processing, communication, and instrumentation and measurement systems [2–4]. SRCOs employing different active building blocks have attracted considerable attention of the researchers due to their several advantages over traditional op-amp-based SRCOs; see [5–15] and the references cited therein. The applications, advantages, and usefulness of VD-DIBA have now been recognised in the realisation of first-order all-pass filter, in simulation of inductors and in the realisation of sinusoidal oscillator [16–18]. However, to the best of the knowledge and belief of the authors, none of the SRCOs using single VD-DIBA has yet been presented in the literature so far. Therefore, the purpose of this paper is to present a new SRCO using a single VD-DIBA along with a bare minimum number of four passive components. The proposed configuration offers (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, and (iii) a very good frequency stability. The workability of the proposed SRCO has been established by SPICE simulations using 0.35？μm MIETEC technology. 2. New Oscillator Configuration The schematic symbol and behavioral model of the VD-DIBA are shown in Figures 1(a) and 1(b), respectively. The model includes two controlled sources: the current source controlled by differential voltage , with the transconductance , and the voltage source controlled by differential voltage , with the unity voltage gain. The VD-DIBA can be described by
References
[1]
D. Biolek, R. Senani, V. Biolkova, and Z. Kolka, “Active elements for analog signal processing: classification, review, and new proposals,” Radioengineering, vol. 17, no. 4, pp. 15–32, 2008.
[2]
R. Senani, “New types of sine wave oscillators,” IEEE Transactions on Instrumentation and Measurement, vol. 34, no. 3, pp. 461–463, 1985.
[3]
R. Senani and D. R. Bhaskar, “Single op-amp sinusoidal oscillators suitable for generation of very low frequencies,” IEEE Transactions on Instrumentation and Measurement, vol. 40, no. 4, pp. 777–779, 1991.
[4]
D. R. Bhaskar and R. Senani, “New CFOA-based single-element-controlled sinusoidal oscillators,” IEEE Transactions on Instrumentation and Measurement, vol. 55, no. 6, pp. 2014–2021, 2006.
[5]
V. K. Singh, R. K. Sharma, A. K. Singh, D. R. Bhaskar, and R. Senani, “Two new canonic single-CFOA oscillators with single resistor controls,” IEEE Transactions on Circuits and Systems II, vol. 52, no. 12, pp. 860–864, 2005.
[6]
S. Celma, P. A. Martinez, and A. Carlosena, “Minimal realisation for single resistor controlled sinusoidal oscillator using single CCII,” Electronics Letters, vol. 28, no. 5, pp. 443–444, 1992.
[7]
D. R. Bhaskar and R. Senani, “New current-conveyor-based single-resistance-controlled/voltage-controlled oscillator employing grounded capacitors,” Electronics Letters, vol. 29, no. 7, pp. 612–614, 1993.
[8]
C. T. Lee and H. Y. Wang, “Minimum realisation for FTFN-based SRCO,” Electronics Letters, vol. 37, no. 20, pp. 1207–1208, 2001.
[9]
D. R. Bhaskar, “Grounded-capacitor SRCO using only one PFTFN,” Electronics Letters, vol. 38, no. 20, pp. 1156–1157, 2002.
[10]
S. S. Gupta and R. Senani, “Grounded-capacitor current-mode SRCO: novel application of DVCCC,” Electronics Letters, vol. 36, no. 3, pp. 195–196, 2000.
[11]
V. Aggarwal, S. Kilin？, and U. ？am, “Minimum component SRCO and VFO using a single DVCCC,” Analog Integrated Circuits and Signal Processing, vol. 49, no. 2, pp. 181–185, 2006.
[12]
S. ？zcan, A. Toker, C. Acar, H. Kuntman, and O. ？i？eko？lu, “Single resistance-controlled sinusoidal oscillators employing current differencing buffered amplifier,” Microelectronics Journal, vol. 31, no. 3, pp. 169–174, 2000.
[13]
U. ？am, “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.
[14]
D. Prasad, D. R. Bhaskar, and A. K. Singh, “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.
[15]
D. Biolek, A. U. Keskin, and V. Biolkova, “Grounded capacitor current mode single resistance-controlled oscillator using single modified current differencing transconductance amplifier,” IET Circuits, Devices and Systems, vol. 4, no. 6, pp. 496–502, 2010.
[16]
D. Biolek and V. Biolkova, “First-order voltage-mode all-pass filter employing one active element and one grounded capacitor,” Analog Integrated Circuits and Signal Processing, vol. 65, no. 1, pp. 123–129, 2010.
[17]
D. Prasad, D. R. Bhaskar, and K. L. Pushkar, “Realization of new electronically controllable grounded and floating simulated inductance circuits using voltage differencing differential input buffered amplifiers,” Active and Passive Electronic Components, vol. 2011, Article ID 101432, 8 pages, 2011.
[18]
D. Prasad, D. R. Bhaskar, and K. L. Pushkar, “Electronically controllable sinusoidal oscillator employing CMOS VD-DIBAs,” ISRN Electronics, vol. 2013, Article ID 823630, 6 pages, 2013.
