Stacked Ring Oscillators with Fractional Injection Lock

Project Code :TVMABE346

Objective

The objective of this project is to design and implement stacked ring oscillators with fractional injection lock to achieve precise frequency control and improved performance in high-speed electronic circuits. It focuses on enhancing oscillator stability and tuning range by leveraging fractional injection locking techniques. The design will be simulated and analyzed to evaluate key parameters such as frequency accuracy, phase noise, and power consumption. Comparative analysis will be carried out to demonstrate improvements over conventional ring oscillator designs. The overall goal is to develop a high-performance, low-power oscillator suitable for advanced communication and signal processing applications.

Abstract

Abstract:

This paper proposes a fractional-N injection-locked ring oscillator (ILRO) based on sequential 2-point injection with programmable injection strength on each point. The 2-point injections effectively achieve an equivalent vector-summed injection, leading to programmable injection position and injection strength. By gradually changing the ratio of the two-point injections, the vector-summed injection can achieve injection at fractional phase step and obtain fractional output frequency resolution. As no delta-sigma modulator (ΔΣM) is employed, the high-frequency shaped quantized phase noise issue can be avoided. A 16-phase, 2-point ILRO composed of delay cells with 8-level of programmable injection strength has been designed and simulated, and an output frequency resolution of fREF/(16×8) has been achieved as analyzed. Meanwhile, the phase noise improvement is similar to the case with fixed single point injection.

NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.