Frequency Discriminator for the Fine Dust Sensor

  • Sun Eui Park Korea Advanced Institute of Science and Technology
  • Ju Yeop Kim Korea Advanced Institute of Science and Technology
  • Han Gi Park Korea Advanced Institute of Science and Technology
  • Joo Eun Bang Korea Advanced Institute of Science and Technology
  • Yu Hwan Shin Korea Advanced Institute of Science and Technology
  • Jae Hyouk Choi Korea Advanced Institute of Science and Technology
DOI: https://doi.org/10.23075/jicas.2021.7.3.005
Keywords: Delay-locked loop (DLL), Fine dust sensor, Frequency discriminator

Abstract

This work presents a delay-locked-loop (DLL)- based frequency discriminator for a fine dust sensor. Detecting the frequency variations of MEMS resonator according to the fine dust concentration, the proposed frequency discriminator provides digital codes which represents the frequency variations. Since the proposed frequency discriminator is based on the CMOS process, it achieved extremely small area of 0.18 mm2 and low power of 12 mW, which facilitates the integration into portable device. The proposed DLL-based frequency discriminator covers the input frequency range of 1890 to 2486 MHz with a resolution of 144 kHz, thus it can discriminate input frequencies with 4111 steps. Additionally, to increases the PVT robustness, it used KVCDL compensation technique.

Author Biographies

Sun Eui Park, Korea Advanced Institute of Science and Technology

Suneui Park (Student Member, IEEE) was born in Seoul, South Korea, in 1994. She received the B.S. and M.S. degrees in electrical engineering from the Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea, in 2017 and 2020, respectively. She is currently pursuing the Ph.D. degree with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. Her research interests include analog, mixed-signal IC designs, especially low-power and low-jitter clock generation circuits.

Ju Yeop Kim, Korea Advanced Institute of Science and Technology

Ju Yeop Kim (Student Member, IEEE) was born in Changwon, South Korea, in 1994. He received the B.S. and M.S. degrees in electrical engineering from the Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea, in 2017 and 2020, respectively. He is currently pursuing the Ph.D. degree with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea. His current research interests include CMOS analog/mixed IC designs, especially millimeter-wave clock/frequency generation systems.

Han Gi Park, Korea Advanced Institute of Science and Technology

Han Gi Park (S’19) was born in Anseong, South Korea, in 1997. He received the B.S. degree (summa cum laude) in electrical engineering from the Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea, in 2019. He is currently pursuing the M.S/Ph.D. degree with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. His research interests include CMOS analog/mixed integrated circuit (IC) designs, especially high-speed clock/frequency generation systems.

Joo Eun Bang, Korea Advanced Institute of Science and Technology

Joo Eun Bang (S’18) was born in Busan, South Korea, in 1995. She received the B.S. and M.S. degrees in electrical engineering from the Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea, in 2018 and 2020, respectively. She is currently pursuing the Ph.D. degree with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. Her current research interests include low-power and high-performance analog, mixed-signal, and RF integrated circuits for emerging wireless/wired standards.

Yu Hwan Shin, Korea Advanced Institute of Science and Technology

Yu Hwan Shin was born in Geoje, South Korea, in 1999. He received the B.S. degree in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea, in 2021. He is currently pursuing the M.S. degree with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. His research interests include CMOS analog/mixed integrated circuit (IC) designs, especially high-speed clock/frequency generation systems.

Jae Hyouk Choi, Korea Advanced Institute of Science and Technology

Jae Hyouk Choi (Senior Member, IEEE) was born in Seoul, South Korea, in 1980. He received the B.S. degree (summa cum laude) in electrical engineering from Seoul National University, Seoul, in 2003 and the M.S. and Ph.D. degrees in electrical and computer engineering from the Georgia Institute of Technology, Atlanta, GA, USA, in 2008 and 2010, respectively.

From 2010 to 2011, he was with Qualcomm, Inc., San Diego, CA, USA, where he was involved in designing multi-standard cellular transceivers. In 2012, he joined the Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea, as a Faculty Member. Since 2019, he has been an Associate Professor with the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. His research interests include low-power and high-performance analog, mixed-signal, and RF integrated circuits for emerging wireless/wired standards.

Dr. Choi has been a TPC Member of the IEEE International Solid-State Circuits Conference (ISSCC) since 2017 and the IEEE European Solid-State Circuits Conference (ESSCIRC) since 2016. He was the Country Representative of South Korea for the ISSCC Far-East Region in 2018. He has been a Distinguished Lecturer (DL) of the Solid-State Circuits Society (SSCS) since 2020.

Homepage : https://www.icsl.snu.ac.kr/

Published
2021-07-01
How to Cite
Park, S. E., Kim, J. Y., Park, H. G., Bang, J. E., Shin, Y. H., & Choi, J. H. (2021). Frequency Discriminator for the Fine Dust Sensor. Journal of Integrated Circuits and Systems, 7(3). https://doi.org/10.23075/jicas.2021.7.3.005
Issue
Vol 7 No 3 (2021)
Section
Articles