Study of Multi-Phase Generation High Frequency Coupled Ring Oscillator

Firstly, applications related with multiphase requirement for different purposes have been explored. With consideration of that, fundamental working principal of coupled complementary metal oxide semiconductor (CMOS) ring oscillator has been discussed with mathematical background of operation for number of different phase generation with frequency of improvement. Compare to conventional ring oscillator, how coupled ring oscillator give better frequency phase performance is explained in detail. With emphasis on different phase permutations in specific dimension, analysis of coupled ring structure in phase domain is presented. Due to sack of intuitive understanding, basic performance parameter like phase noise with power dissipation relationship is described with mechanical analogy of system.