Low-Voltage, Low-Area, nW-Power CMOS Digital-Based Biosignal Amplifier

IEEE Access

Pedro Toledo¹  Paolo S. Crovetti¹  Francesco Musolino¹  Sergio Bampi²  Hamilton D. Klimach² 

[1] Department of Electronics and Telecommunications (DET), Politecnico di Torino, Turin, Italy;Graduate Program in Microelectronics (PGMICRO), Federal University of Rio Grande do Sul, Porto Alegre, Brazil;

关键词: Ultra-low voltage (ULV) CMOS;    ultra-low power (ULP);    operational transconductance amplifier (OTA);    digital-based circuit;    the Internet of Things (IoT);   

DOI  :  10.1109/ACCESS.2022.3168603

来源: DOAJ

【 摘 要 】

This paper presents the operation principle and the silicon characterization of a power efficient ultra-low voltage and ultra-low area fully-differential, digital-based Operational Transconductance Amplifier (OTA), suitable for microscale biosensing applications (BioDIGOTA). Measured results in 180nm CMOS prototypes show that the proposed BioDIGOTA is able to work with a supply voltage down to 400 mV, consuming only 95 nW. Owing to its intrinsically highly-digital feature, the BioDIGOTA layout occupies only 0.022 mm² of total silicon area, lowering the area by $3.22\times $ times compared to the current state of the art, while keeping reasonable system performance, such as 7.6 NEF with $1.25~\mu V_{\mathrm {RMS}}$ input referred noise over a 10 Hz bandwidth, 1.8% of THD, 62 dB of CMRR and 55 dB of PSRR.

【 授权许可】

Unknown