1. Dynamic and Static Calibration of Ultra-Low-Voltage, Digital-Based Operational Transconductance Amplifiers
- Author
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Hamilton Klimach, Paolo Stefano Crovetti, Sergio Bampi, and Pedro Toledo
- Subjects
dynamic calibration ,0209 industrial biotechnology ,Computer Networks and Communications ,Computer science ,Transconductance ,lcsh:TK7800-8360 ,fully-digital design ,02 engineering and technology ,ultra-low-voltage ,020901 industrial engineering & automation ,Hardware_INTEGRATEDCIRCUITS ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Calibration ,Electrical and Electronic Engineering ,operational transconductance amplifier (OTA) ,digital-based OTA (DB-OTA) ,static calibration ,Amplifier ,lcsh:Electronics ,020208 electrical & electronic engineering ,Power (physics) ,CMOS ,Hardware and Architecture ,Control and Systems Engineering ,Modulation ,Signal Processing ,Low voltage ,Pulse-width modulation - Abstract
The calibration of the effects of process variations and device mismatch in Ultra Low Voltage (ULV) Digital-Based Operational Transconductance Amplifiers (DB-OTAs) is addressed in this paper. For this purpose, two dynamic calibration techniques, intended to dynamically vary the effective strength of critical gates by different modulation strategies, i.e., Digital Pulse Width Modulation (DPWM) and Dyadic Digital Pulse Modulation (DDPM), are explored and compared to classic static calibration. The effectiveness of the calibration approaches as a mean to recover acceptable performance in non-functional samples is verified by Monte-Carlo (MC) post-layout simulations performed on a 300 mV power supply, nW-power DB-OTA in 180 nm CMOS. Based on the same MC post-layout simulations, the impact of each calibration strategy on silicon area, power consumption, and OTA performance is discussed.
- Published
- 2020