A 5kHz Bandwidth Low Noise Chopper-Stabilized Dual-Band Selective Filter SoC

  • Jae Bin Kim
  • Tae Seob Oh
  • Jong Wan Jo
  • Kang Yoon Lee Sungkyunkwan Univ.
Keywords: Band pass filter, Chopper structure, Soc

Abstract

In this paper, various blocks and structures applied to the low-noise 2 band selection band pass filter are described. In the proposed band pass filter when the frequency is input through the buffer, one of Band 1 or Band 2 can be selected using the switch, and the output goes through the buffer after the selected switch among Band 1 and Band 2. After the pre-amplifier, the low frequency band pass filter is used to secure -3 dB or more at 29.5 kHz (5 kHz range) and is used to secure -1 dB or more at 39.5 kHz (5 kHz range). The aim is to remove the interference between bands by -20 dB or more at the interference frequencies of 29.5 Hz and 39.5 Hz, which are the center frequencies of each band. Chopper structure was used to reduce noise, and it was designed to drop more than -21dB/√Hz in Band1,2.

Author Biographies

Jae Bin Kim

Jae Bin Kim received his B.S. degree from the Department of Electrical Engineering at Myongji University, Yongin, Korea, in 2019, Since then he has been working toward the combined Ph.D. & M.S. Course in electronics and computer engineering from Sungkyunkwan University, Suwon, Korea. His research interests include Power Management IC and Wireless Power Transfer System.

Tae Seob Oh

Tae Seob Oh received his B.S. degree from the Department of Mathmatics at Sungkyunkwan University, Suwon, Korea, in 2020, He is currently working toward the M.S. course in Electornics and Computer Engineering from Sungkyunkwan University, Suwon, Korea. His research interests include Neuromorphic IC.

Jong Wan Jo

Jong Wan Jo received his B.S. degree from the Department of Electronic Engineering at Cheongju University, Cheongju, Korea, in 2018, and the M.S. degree in School of Information and Communication Engineering, Sungkyunkwan University. He is currently working toward a Ph.D. degree in electronic engineering at Sungkyunkwan University. His research interests include Wireless Power Transfer systems and Power Management IC.

Published
2021-04-01
Section
Articles