Low-voltage, low-area, nW-power CMOS digital-based biosignal amplifier

• Autor(a) principal: Crovetti, Paolo Stefano
• Data de Publicação: 2022
• Outros Autores: Klimach, Hamilton Duarte, Musolino, Francesco, Bampi, Sergio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/242087
• topic: Amplificadores operacionais; Baixa tensão; Circuitos digitais; Ultra-low voltage (ULV) CMOS; Ultra-low power (ULP); Operational transconductance amplifier (OTA); Digital-based circuit; The Internet of Things (IoT)

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 compared to the current state of the art, while keeping reasonable system performance, such as 7.6 NEF with 1.25 μVRMS input referred noise over a 10 Hz bandwidth, 1.8% of THD, 62 dB of CMRR and 55 dB of PSRR.