A CMRR enhancement circuit by employing auxiliary buffer of capacitively coupled instrumentation amplifier for neural signal recording

A CMRR enhancement circuit by employing auxiliary buffer of capacitively coupled instrumentation amplifier for neural signal recording

Here, a common‐mode rejection ratio (CMRR) enhancement circuit is proposed by employing an auxiliary buffer (AB) to the pseudo resistors of the capacitively coupled instrumentation amplifier (CCIA). After applying AB to CCIA, the differential‐mode gain remains the same with an extended bandwidth, an...

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Veröffentlicht in:Electronics Letters 2021-11, Vol.57 (24), p.906-908
Hauptverfasser: Zhu, Longbin, Zhou, Zhijun, Zhang, Chiyuan, Meng, Qiao, Wang, Zhi‐gong
Format: Artikel
Sprache:eng
Schlagworte:
Amplification
Amplifiers
Bandwidths
Bioelectric signals
Bioelectricity
Buffers
Business metrics
Circuits
CMOS integrated circuits
Coupled modes
Electrical activity in neurophysiological processes
Instruments
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Zusammenfassung:Here, a common‐mode rejection ratio (CMRR) enhancement circuit is proposed by employing an auxiliary buffer (AB) to the pseudo resistors of the capacitively coupled instrumentation amplifier (CCIA). After applying AB to CCIA, the differential‐mode gain remains the same with an extended bandwidth, and the common‐mode gain is reduced, and therefore, the CMRR is enhanced.
ISSN:0013-5194
1350-911X
DOI:10.1049/ell2.12313