Title :
A 0.8-V 0.25-mW Current-Mirror OTA With 160-MHz GBW in 0.18-μm CMOS
Author :
Lin, Tsung-Hsien ; Wu, Chin-Kung ; Tsai, Ming-Chung
Author_Institution :
Graduate Inst. of Electron. Eng., Nat. Taiwan Univ.
Abstract :
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
Keywords :
CMOS integrated circuits; circuit feedback; current mirrors; low-power electronics; operational amplifiers; 0.18 micron; 0.25 mW; 0.8 V; 160 MHz; 2 pF; 62 dB; CMOS process; common-mode feedback circuit; current-mirror OTA; gain-bandwidth product; low-power OTA; low-voltage electronics; operational transconductance amplifier; CMOS process; Circuit simulation; Circuit topology; Energy consumption; Feedback circuits; Operational amplifiers; Rail to rail amplifiers; Rail to rail outputs; Transconductance; Voltage; Current mirror; gain–bandwidth product (GBW); operational transconductance amplifier (OTA);
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.886465
