An ultra-low-voltage VCO-based ΔΣ modulator using self-compensated current reference for variation tolerance

• Main Authors: Narasimman, Neelakantan, Kim, Tony Tae-Hyoung
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Electrical and electronic engineering; VCO-Based ΔΣ Modulator; Ultra-Low Voltage
• Online Access: https://hdl.handle.net/10356/154553
• Institution: Nanyang Technological University

This paper introduces a voltage-controlled-oscillator-based (VCO-based) first-order delta-sigma (ΔΣ) modulator that uses a novel current reference to improve the robustness of the modulator at ultra-low operating voltages. The proposed current reference harnesses the difference in transistor charact...