%0 Journal Article
%T Designing the Ring-Type Voltage Controlled Oscillator
%A Saeid Niyakan‎
%J specialty journal of electronic and computer sciences
%@ 2412-7485
%D 2019
%V 5
%N 2
%P 67-84
%X A voltage controlled oscillator (VOC), in fact, is a generator of adjustable frequency. A ‎VOC is used as a key part in the phase lock ring, which is a system that generates a ‎sustained oscillating signal. Since the digital electronics industry needs a growing ‎increase of performance in speed, it is necessary that the VOCs generate the signals in ‎higher frequencies. But, as the frequency increases, the VOC phase noise decreases. ‎Even though there are two main types of VOCs i.e. ring and capacitive-inductive types, ‎in this research, the ring oscillator is designed and simulated using the Dual-gate ‎transistors. The results showed that, compared to MOSFET transistors, frequencies ‎could be generated using the dual-gate transistors. Then, various signals were ‎generated using the op-amp and frequency divider and also using the ring oscillator. ‎Finally, three outputs were weighted and summed and it was shown that oscillations ‎with three times of frequency could be generated using the weighted sum of the phase ‎shift oscillator output‎‎‎‎.
%U https://sciarena.com/article/designing-the-ring-type-voltage-controlled-oscillator