A 400-MHz wireless neural signal processing IC with 625× on-chip data reduction and reconfigurable BFSK/QPSK transmitter based on sequential injection locking

Kok Hin Teng, Tong Wu, Zhi Yang, Chun Huat Heng, Xiayun Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

An 8-channel wireless neural signal processing IC, which can perform real-time spike detection, alignment, feature extraction, and wireless data transmission is proposed. A reconfigurable BFSK/QPSK TX at MICS band is incorporated to support different data rate requirement. By using Exponential Component-Polynomial Component (EC-PC) spike processing unit with incremental principal component analysis (IPCA) engine, an overall 625× data reduction is achieved. The EC-PC unit is capable of detecting neural spikes of poor SNR. In TX, dual channels at 401 MHz and 403.8 MHz are supported by applying fixed injection and sequential injection locked techniques while attaining phase noise of -102 dBc/Hz@100 kHz offset. The measured EVM of 4.60%/9.55% with PA output power of -15dBm is achieved for QPSK@8 Mbps and BFSK@12.5 kbps. Fabricated in 65 nm CMOS with an area occupation of 1 mm2, the design consumes a total current of 5~5.6 mA with maximum energy efficiency of 0.7 nJ/b.

Original languageEnglish (US)
Title of host publication2015 IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467371919
DOIs
StatePublished - Jan 19 2016
Event11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Xiamen, Fujian, China
Duration: Nov 9 2015Nov 11 2015

Publication series

Name2015 IEEE Asian Solid-State Circuits Conference, A-SSCC 2015 - Proceedings

Conference

Conference11th IEEE Asian Solid-State Circuits Conference, A-SSCC 2015
CountryChina
CityXiamen, Fujian
Period11/9/1511/11/15

Keywords

  • EC-PC
  • injection locking
  • neural signal processing
  • reconfigurable
  • transmitter

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