1. Oscillators: Analysis and Designs
Asst. Prof. Dr. Pipat Prommee
Telecommunications Engineering Department
KMITL
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Asst .Prof. Dr.Pipat Prommee

2. Sinusoidal Oscillator Principle
Amplifier K
H(s)
Asst .Prof. Dr.Pipat Prommee

3. Unstable Network Functions
Inv. Laplace
Inv. Laplace
Inv. Laplace
Asst .Prof. Dr.Pipat Prommee

4. Unstable Network Functions
Double Poles
Asst .Prof. Dr.Pipat Prommee

5. Sinusoidal Oscillator Principle
No Input condition
Asst .Prof. Dr.Pipat Prommee

6. 2nd Order Polynomial-Based Oscillator
where
and
Asst .Prof. Dr.Pipat Prommee

7. Asst .Prof. Dr.Pipat Prommee
3rd Order Polynomial-Based Oscillator
and
Asst .Prof. Dr.Pipat Prommee

8. N - orders Cascaded Approach
For Example: n =3
Asst .Prof. Dr.Pipat Prommee

9. Asst. Prof. Dr. Pipat Prommee
Oscillators Designs
Asst. Prof. Dr. Pipat Prommee
Asst .Prof. Dr.Pipat Prommee

10. Example 1: Wein-Bridge Oscillator
Suppose k=3, the frequency is obtained
Asst .Prof. Dr.Pipat Prommee

11. Example 2: Phase-Shift Oscillator
Suppose k=-29, the Freq. is obtained
Asst .Prof. Dr.Pipat Prommee

12. Voltage-mode Lossy and Lossless Integrators
Lossy Integrators
Lossless Integrators
Asst .Prof. Dr.Pipat Prommee

13. Quadrature Oscillator
where
and
Asst .Prof. Dr.Pipat Prommee

14. Asst .Prof. Dr.Pipat Prommee
3rd Order Filter #1
3rd Order filter based on Lossy and Lossless Integrators
Asst .Prof. Dr.Pipat Prommee

15. Principle of 3rd Order Oscillator #1 [2]If
Therefore
Asst .Prof. Dr.Pipat Prommee

16. Asst .Prof. Dr.Pipat Prommee
OTA-based 3rd filter #1
Asst .Prof. Dr.Pipat Prommee

17. OTA-based 3rd Oscillator #1
Asst .Prof. Dr.Pipat Prommee

18. Asst .Prof. Dr.Pipat Prommee
3rd Order Filter #2
Asst .Prof. Dr.Pipat Prommee

19. 3rd Order Oscillator #2 [2]If
Therefore
Asst .Prof. Dr.Pipat Prommee

20. Asst .Prof. Dr.Pipat Prommee
Voltage Proportional
Asst .Prof. Dr.Pipat Prommee

21. OTA-based 3rd Order filter #2
Asst .Prof. Dr.Pipat Prommee

22. OTA-based 3rd Order Oscillator #2
Asst .Prof. Dr.Pipat Prommee

23. OTA-based 3rd Order Oscillator #2
Asst .Prof. Dr.Pipat Prommee

24. CMOS based 3rd Order Oscillator #1
Asst .Prof. Dr.Pipat Prommee

25. Quarature Output of 1st order Oscillator
Asst .Prof. Dr.Pipat Prommee

26. Frequency against biased current and different C of 1st Oscillator
Asst .Prof. Dr.Pipat Prommee

27. Asst .Prof. Dr.Pipat Prommee
CMOS based 3rd Order Oscillator #2
Asst .Prof. Dr.Pipat Prommee

28. Asst .Prof. Dr.Pipat Prommee
Quarature Output Signal of 2nd order Oscillator
Asst .Prof. Dr.Pipat Prommee

29. Asst .Prof. Dr.Pipat Prommee
Frequency against biased current and different C of 2nd Oscillator
Asst .Prof. Dr.Pipat Prommee

30. Current-mode Integrator based on OTA
Lossy Integrators
Lossless Integrators
Asst .Prof. Dr.Pipat Prommee

31. Asst .Prof. Dr.Pipat Prommee
CMOS OTA
Asst .Prof. Dr.Pipat Prommee

32. Current-mode OTA Oscillator #1 [4]
Asst .Prof. Dr.Pipat Prommee

33. Current-mode OTA Oscillator #2 [4]
Asst .Prof. Dr.Pipat Prommee

34. Current-mode OTA Oscillator Output [4]
Asst .Prof. Dr.Pipat Prommee

35. Current Controlled Current Conveyor (CCCII) [7]
Asst .Prof. Dr.Pipat Prommee

36. Asst .Prof. Dr.Pipat Prommee
OTA against CCCII X Y Z+ Z-
CCCII Ib
Vin IO
Asst .Prof. Dr.Pipat Prommee

37. Current-mode Oscillator based on CCII [3]
Asst .Prof. Dr.Pipat Prommee

38. Asst .Prof. Dr.Pipat Prommee
Oscillator outputs
Asst .Prof. Dr.Pipat Prommee

39. CCCII-based differentiator and Integrator
Lossy Differentator
Lossy Integrator
Asst .Prof. Dr.Pipat Prommee

40. N-order (odd) Oscillators [1]
Asst .Prof. Dr.Pipat Prommee

41. N-order (Even) Oscillators [1]
Asst .Prof. Dr.Pipat Prommee

42. Asst .Prof. Dr.Pipat Prommee
Oscillation Output
Asst .Prof. Dr.Pipat Prommee

43. Asst .Prof. Dr.Pipat Prommee
References
A.R. Vazquez, B.L. Barrnco, J.L. Huertas and E.S.Sinencio, “On the design of voltage-controlled sinusoidal oscillators using OTAs,” IEEE Trans. Circuits and Syst., Vol. 37, No. 2, Feb
M. T. Abuelma’atti and M. A. Al-Qahtani, “A New Current-Controlled Multiphase SinusoidalOscillator Using Translinear Current Conveyors,” IEEE Trans. Circuits and Syst.-II, Vol. 45, No. 7, July 1998.
S.J.G. Gift, “Multiphase Sinusoidal Oscillator Using Inverting-Mode Operational Amplifiers,” IEEE Trans. Instru. and Meas., Vol. 47, No. 4, Aug
P. Prommee, K. Dejhan,“An integrable electronic-controlled quadrature sinusoidal oscillator using CMOS operational transconductance amplifier,”International Journal of Electronics, Vol.89, no.5, pp , 2002.
S. Maheshwari and I.A. Khan, “Current controlled third order quadrature oscillator,” IEE Proc. Circuits Devices Syst., Vol. 152, No. 6, December 2005.
T. Tsukutani, Y. Sumi and Y. Fukui, “Electronically controlled current-mode oscillators using MO-OTAs and grounded capacitors,” Frequenz, Vol.60 pp , 2006.
F. Seguin and A. Fabre, “New Second Generation Current Conveyor with Reduced Parasitic Resistance and Bandpass Filter Application,” IEEE Trans. Circuits and Syst.-I, Vol. 48, No. 6, June 2001.
Asst .Prof. Dr.Pipat Prommee