Implementation & comparison of different oscillators for ISM and WI-FI band applications

The communication system has become an integral part of human life. The most important block of communication system is oscillator. This paper focused on implementation of different types of oscillator (Ring oscillator, LC oscillator & Voltage control oscillator) for ISM & Wi-Fi band applications using 90nm, 65nm & 45nm technologies using microwind 3.5 software. For ring oscillator developed using 65nm & 45nm saves the area up to 40% & 80% as compared to ring oscillator developed with 90nm technology but for this we have to inject parasitic to get the desired frequency band. For LC oscillator desired band of frequency can be achieved by compromising large area as we need to develop inductor on chip. To overcome this problem the voltage control oscillator (VCO) is designed. The VCO gives desired band of frequency just by changing external DC Voltage, so it is more susceptible to advanced in technology.