A 0.8-V 0.25-mW current-mirror OTA with 160-MHz GBW in 0.18-mu m CMOS

作者：Lin Tsung Hsien^*; Wu Chin Kung; Tsai Ming Chung

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2007, 54(2): 131-135.

DOI：10.1109/TCSII.2006.886465

• current mirror
• gain-bandwidth product (GBW)
• operational transconductance amplifier (OTA)

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-mu m CMOS process. The power consumption is 0.25 mW including the common-mode feedback circuit.

• 出版日期2007-2
• 单位中国科学院电工研究所