An Ultra-Low-Power 2.4 GHz All-Digital Phase-Locked Loop With Injection-Locked Frequency Multiplier and Continuous Frequency Tracking

IEEE Access

Joon-Mo Yoo¹  Pervesh Kumar¹  Youngoo Yang¹  Kang-Yoon Lee¹  Imran Ali¹  Seongjin Oh¹  Yeonjae Jung¹  Hyungki Huh¹  Muhammad Asif¹  Younggun Pu¹  Muhammad Riaz Ur Rehman¹  Seokkee Kim¹  Keum Cheol Hwang¹  Arash Hejazi¹  Sang-Sun Yoo² 

[1] College of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea;Department of Smart Automobile, Pyeongtaek University, Pyeongtaek, South Korea;

关键词: ADPLL;    injection locked frequency multiplier;    low power;    small area;    Internet of Things;    digitally-controlled oscillator;   

DOI  :  10.1109/ACCESS.2021.3123167

来源: DOAJ

【 摘 要 】

This paper presents a 0.46 mW and 2.4 GHz; All-Digital Phase-Locked Loop (ADPLL) through an Injection-Locked Frequency Multiplier (ILFM) and Continuous Frequency Tracking Loop (CFTL) circuitry for low power Internet-of-Thing (IoT) applications. In the proposed ADPLL architecture to save power, the need for Time-to-Digital Converter (TDC) is eliminated through providing the CFTL circuitry. This feature makes the design compact, low power, and suitable for IoT applications. The proposed design is based on a synthesizable pulse injection and frequency-locked loop along with an ultra-low-power LC Digitally-Controlled Oscillator (LC-DCO). The presented CFTL circuit adjusts the frequency of the DCO continuously and prevents the frequency drift after the reference injection. Inside the designed LC-DCO core, the power consumption is minimized by optimizing the $\text{g}_{\mathrm {m}}~/\text{I}_{\mathrm {D}}$ and adjusting the power supply to 0.5 V. The proposed ILFM based ADPLL is fabricated in 55 nm CMOS technology and covers the operational frequency range of 2.402 GHz to 2.480 GHz with a reference frequency of 32 MHz. The measured phase noise performance of the ADPLL is −111.15 dBc/Hz at 1 MHz offset frequency from the carrier frequency of 2.4 GHz. It consumes only 0.46 mW power with an active area of 0.129 mm².

【 授权许可】

Unknown