Noise and Power Efficient CMOS Amplifier for Biomedical Signal Recording Application
This paper presents a design procedure by using the Equivalent Circuit Approach (ECA) for a low power, low noise, and rail-to-rail output swing Operational Amplifier (Opamp) which is applicable for Biomedical signal recording systems. A differential pMOS input stage is used for noise cancellation and a common source stage is used at the output for high output swing. Input stage of the op amp is operated in the weak inversion region for Biosignal sensing, amplification and filtering. The opamp is experimentally validated through TSMC 90nm CMOS process Technology and a comparison is carried out with previous designs. This opamp exhibits input referred noise of 28nV/sq rt hz, Phase Margin =830, B.W=10.1khz and power consumption 91μW for 40μA external bias current Importantly, all these advantages are achieved at the cost of little Gain deviation.
Low power Weak inversion region Rail-to-rail Equivalent Circuit Approach (ECA) Opamp
Basanta Bhowmik Manisha Pattanaik Pankaj Srivastava
ABV-Indian Institute of Information Technology and Management Morena Link Road, Gwalior- 474015, Mad ABV-Indian Institute of Information Technology and Management Morena Link Road, Gwalior-474015, Madh
国际会议
三峡
英文
3294-3297
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）