A 2.4 GHz Low Power Low-IF Receiver Employing OOK and FSK Dual-Mode Demodulator for IoT Applications

Myung Hun Lee; Ku Duck Kwon

doi:10.23075/jicas.2021.7.4.003

Myung Hun Lee Samsung Electronics
Ku Duck Kwon Kangwon National University

DOI: https://doi.org/10.23075/jicas.2021.7.4.003

Keywords: 2.4-GHz, Dual-mode demodulator, Frequency-Shift Keying(FSK), IoT, Low-power, On-Off Keying(OOK)

Abstract

In this paper, a 2.4 GHz low-power low-IF receiver employing a dual-mode demodulator for on-off keying (OOK) and frequency-shift keying (FSK) signals is presented for Internet of Things (IoT) applications. The switched dual-mode demodulator can demodulate both OOK and FSK signals. The proposed receiver consists of a low-noise transconductance amplifier, single-balanced current-mode passive mixer, transimpedance amplifier, variable gain amplifier, and dual-mode demodulator. The proposed receiver was designed in a 65-nm CMOS process and mainly simulated at 2.4 GHz. The receiver achieves a noise figure of 9.9 dB, a maximum conversion gain of 74 dB, and an input-referred third-order intercept point of −26.3 dBm. The active die area of the designed receiver is 0.53 mm², and it draws a bias current of 1.8 mA from a nominal supply voltage of 1 V.

Author Biographies

Myung Hun Lee, Samsung Electronics

Myung Hun Lee received the integrated B.S. and M.S. degree from the Department of Electronics Engineering, Kangwon National University, Chuncheon, Korea, in 2019 and 2021, respectively. In 2021, he joined Samsung Electronics Company Ltd., Hwaseong, South Korea. His research interests include CMOS RF/analog integrated circuits and RF system design for wireless communications. He was a recipient of Ministry of Trade, Industry and Energy award for Korea Semiconductor Design Competition in 2019 and 3rd award for 11th ETNEWS ICT best paper award in 2019.

Ku Duck Kwon, Kangwon National University

Ku Duck Kwon received the B.S. and Ph.D. degrees in Electrical Engineering and Computer Science from Korea Advanced Institute of Science and Technology (KAIST), in Daejeon, South Korea, in 2004 and 2009, respectively. His doctoral research concerned digital TV tuners and dedicated short-range communi-cation (DSRC) systems.

From 2009 to 2010, he was a Post-Doctoral Researcher with KAIST, where he studied a surface acoustic wave (SAW)-less receiver architectures and developed 5.8GHz RF transceivers for DSRC applications. From 2010 to 2014, he was a Senior Engineer with Samsung Electronics Co. LTD., Suwon, South Korea, where he has been involved with studies of the SAW-less software-defined receivers and development of CMOS transceivers for 2G/3G/4G cellular applications and receivers for universal silicon tuners. In 2014, he joined the Department of Electronics Engineering, Kangwon National University, Chuncheon, South Korea, where he is currently an Associate Professor. His research interests include CMOS mmWave/RF/analog integrated circuits and RF system design for wireless communications.

Homepage : https://sites.google.com/view/racas-knu