A 192nW inverter-based chopper instrumentation amplifier for micropower ECG applications
- Resource Type
- Conference
- Authors
- Wang, Shi; Wang, Yixiao; Chen, Long; Wang, Jiayi; Liu, Xiaozhe; Ye, Le; Huang, Ru; Liao, Huailin
- Source
- 2014 12th IEEE International Conference on Solid-State and Integrated Circuit Technology (ICSICT) Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on. :1-3 Oct, 2014
- Subject
- Components, Circuits, Devices and Systems
Instruments
Switches
Electrocardiography
Electronic mail
Abstracts
Attenuators
Frequency locked loops
- Language
This paper proposes a low-power inverter-based chopper instrumentation amplifier (IA) for ECG applications. A capacitively-coupled topology with chopper is employed while a two-stage inverter-based amplifier serves as the gain stage. Pseudo resistors are introduced to stabilize the output common-mode voltage of the amplifier and an improved switch-capacitor integrator with resistive attenuator is designed for the DC offset canceling (DCOC) loop. The instrumentation amplifier is implemented in a standard 0.18µm CMOS process. Simulation results show that the input referred noise is 1.28 µVrms ranging from 1Hz to 110Hz while consuming 192nW with a 1.2V supply.