Czasopismo | PRZEGLĄD ELEKTROTECHNICZNY | Rocznik 2016 - zeszyt 9

New Current-mode Quadrature Sinusoidal Oscillator Using Single DVCCTA as Active Element

10.15199/48.2016.09.56

Prungsak UTTAPHUT

nr katalogowy: 100544
10.15199/48.2016.09.56

This paper presents the design of a current-mode quadrature sinusoidal oscillator. It can generate two current-mode sinusoidal outputs with 90 degree phase difference called as quadrature signal. The proposed sinusoidal oscillator employs single differential voltage current conveyer transconductance amplifier (DVCCTA), two grounded capacitors and three resistors. The tuning of frequency of oscillation (FO) and condition of oscillation (CO) can be done independently. Also the frequency of oscillation can be electronically tuned which is suitable for modern control system using microcontroller or microprocessor. The impedance at output node is high impedance which can directly drive an external load or connect to another circuit without the use of current buffers. A number of simulation results based on PSPICE program using 0.25 μm TSMC CMOS parameters are included to exhibit performance, workability and effectiveness of the proposed sinusoidal oscillator. Streszczenie. W artykule opisano projekt prądowego generatora sinusoidalnego. Może on generować sygnały z przesunięciem 90. Generator wykorzystuje różnicowy przetwornik napięcie prąd ze wzmacniaczem transkonduktancyjnym - DVCCTA., dwa uziemione kondensatory I trzy rezystory. Generator może być strojony elektronicznie. Nowy generator sinusoidalny wykorzystujący jako aktywny element układ DVCCTA. Keywords: qudrature sinusoidal oscillator; current-mode; DVCCTA. Słowa kluczowe: generator sinusoidalny, układ DVCCTA. Introduction In electrical and electronic engineering, the sinusoidal signal has gained much of importance. The circuit which generates the sine wave is called as oscillator. Ideally, the oscillator should generate the sinusoidal signal with low total harmonic distortions (THD). Especially, the quadrature sinusoidal oscillator which provides two sinusoidal signals with 90 degree phase difference is very useful in many applications, for example, in measurement[...]

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