A 0.8-V 0.25-mW Current-Mirror OTA With 160-MHz GBW in 0.18- mu m CMOS

A low-voltage low-power CMOS operational transconductance amplifier (OTA) with near rail-to-rail output swing is presented in this brief. The proposed circuit is based on the current-mirror OTA topology. In addition, several circuit techniques are adopted to enhance the voltage gain. Simulated from...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2007, Vol.54 (2)
Main Authors: Lin, Tsung-Hsien, Wu, Chin-Kung, Tsai, Ming-Chung
Format: Article
Language:English
Subjects:
Circuits
CMOS
Electric potential
Feedback circuits
Gain
Power consumption
Voltage
Voltage gain
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Summary:A low-voltage low-power CMOS operational transconductance amplifier (OTA) with near rail-to-rail output swing is presented in this brief. The proposed circuit is based on the current-mirror OTA topology. In addition, several circuit techniques are adopted to enhance the voltage gain. Simulated from a 0.8-V supply voltage, the proposed OTA achieves a 62-dB dc gain and a gain-bandwidth product of 160 MHz while driving a 2-pF load. The OTA is designed in a 0.18-mum CMOS process. The power consumption is 0.25 mW including the common-mode feedback circuit
ISSN:1549-7747
DOI:10.1109/TCSII.2006.886465