An Ultralow-Power Low-Voltage Class-AB Fully Differential OpAmp for Long-Life Autonomous Portable Equipment

Autor:	Santiago Celma, Nicolás Medrano, M. R. Valero Bernal, Belén Calvo
Rok vydání:	2012
Předmět:	Open-loop gain Engineering Subthreshold conduction business.industry Electrical engineering Differential amplifier Phase margin Slew rate law.invention Common-mode rejection ratio law Low-power electronics Electronic engineering Operational amplifier Electrical and Electronic Engineering business
Zdroj:	IEEE Transactions on Circuits and Systems II: Express Briefs. 59:643-647
ISSN:	1558-3791 1549-7747
DOI:	10.1109/tcsii.2012.2213361
Popis:	This brief presents an ultralow-power class-AB operational amplifier (OpAmp) designed in a low-cost 0.18- μm CMOS technology. The proposed circuit uses transistors biased in the subthreshold region for low-voltage low-power operation. For a 0.8-V single supply, this OpAmp has 51-dB open-loop gain, 57-kHz unity-gain frequency, 60° phase margin, and 65-dB common-mode rejection ratio for 8-pF loads with a power consumption of only 1.2 μW. Experimental results illustrate performances such as a 0.14-V/μs slew rate and a 750-mV linear output swing, demonstrating its correct functionality.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::93ae12e327dadc1e619062015b8f812f https://doi.org/10.1109/tcsii.2012.2213361 Zobrazit plný text záznamu