A Performance Comparison of CMOS Voltage-Controlled Ring Oscillators for Its Application to Generation and Distribution Clock Networks
Now-a-days, design of high-performance processors that perform many functions at high speed and low power consumption is of vital importance for the implementation of multimedia equipment (e.g. computers, cell phones, video games, video cameras, audio players, etc.). In high-performance microprocessors, a large number of functions are carried out in a synchronous digital way; therefore, the incorporation of a timing system responsible for generating and distributing the synchronization signals is indispensable. In this paper, a performance comparison of expanded CMOS voltage-controlled ring oscillators for non-resonant local clock generation and distribution networks is presented. Several differential and single-ended ring oscillators are designed and fabricated using long interconnection lines to achieve wide coverage chip.