Multiloop High-Power-Supply-Rejection Quadrature Ring Oscillator

Abstract

This paper presents a source-follower-delay-cell, multiloop ring oscillator that provides power-supply isolation. The main contributions of this work are a source-follower-based delay cell with a multiloop ring structure achieving improved supply rejection, a design-orie nted analysis of the proposed structure to facilitate its use, and a layout technique allowing straightforward mask design for the multiloop oscillator. The oscillator also features differential control voltages to allow re- jec