The LC Voltage Controlled Oscillator is the most crucial part of the Phase Lock Loop that leads to produce a high system frequency in the range of GHz – RF band for the wireless Devices. The LC VCO – main block of PLL plays vital role in majority of applications in ISM frequency band – RF frequency band (Industrial, Scientific, Medical) like – IEEE 802.11a/b/g, Zigbee, front-end RF transceiver, – IEEE 802.15.4, Bluetooth etc. The overall performance and efficiency of these designs for applications depend upon the parameters and design methods of the LC Voltage – Oscillator. As a requirement to satisfy accuracy and efficiency constrains, new design techniques have been presented in this review paper to improve the features like phase noise, low power, FOM and frequency tuning range for new circuit design technique. In this era, different design methods have been used in LC VCO to improve performance parameters of LC VCO to achieve best results. Still research is going on to achieve more accurate results. The main objective of this review paper is to serve different design techniques of LC VCO to achieve low Phase Noise and low power including FOM in the frequency band of ISM. In the proposed Paper, the comparative analysis is presented for different design techniques of LC VCO with merits – demerits of all the features and concluding remarks in the field of ISM band applications.
For Whole Article : LOW PHASE NOISE LC VOLTAGE CONTROLLED OSCILLATOR A REVIEW
