Improving power efficiency of a two-stage operational amplifier for biomedical applications

被引：25
|
作者：
Akbari, Meysam [1 ]
Nazari, Masoud [2 ]
Sharifi, Leila [2 ]
Hashemipour, Omid [3 ]
机构：
[1] Payame Noor Univ, Dept Elect & Comp Engn, Tehran 193953697, Iran
[2] Shahid Beheshti Univ, Microelect Lab, GC, Tehran, Iran
[3] Shahid Beheshti Univ, Dept Elect & Comp Engn, GC, Tehran, Iran
来源：
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING | 2015年 / 84卷 / 02期
关键词：
OTA; Weak inversion region; Recycling folded cascode; Feed-forward path; Composite transistor; RECYCLING FOLDED CASCODE; ULTRA-LOW-VOLTAGE; GAIN; OTA; TRANSCONDUCTANCE; CANCELLATION; PERFORMANCE; DESIGN; NOISE;
D O I：
10.1007/s10470-015-0542-y
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
By using compensation technique with feed-forward path, an improved folded cascode operational transconductance amplifier (OTA) that operates in weak inversion region is designed. The proposed configuration consists of composite transistors, recycling structure and feed-forward compensation path. In comparison with the typical folded cascode CMOS Miller amplifier, this design has higher DC gain, unity gain frequency and slew rate without adversely affecting the noise and offset performance. The presented OTA is simulated in 0.18 mu m CMOS technology and the simulation results confirm the theoretical analyses. Finally, the proposed amplifier has a 104.5 dB open-loop DC gain and 69.4 kHz unity gain frequency @ 0.6 V supply voltage while the power consumption is 300 nW.
引用
收藏
页码：173 / 183
页数：11
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