Paper Info
Title
An accurate switched-capacitor heart resistance measurement for cardiac pacemaker.
Abstract
This paper presents an accurate heart resistance measurement circuit using switched-capacitor technique for cardiac pacemaker. A reference current flows through the heart, resulting in a voltage drop that represents the heart resistance. And then the voltage drop is exactly stored and amplified by the switched-capacitor amplifier (SC-AMP) while the voltage error is considered and calibrated. Compared with the conventional approach, the proposed circuit required a smaller reference current flowing through the heart and a lower precision ADC digitizing the voltage drop. Safety can be guaranteed due to smaller reference current while a low precision ADC relaxes the design complexity and saves power. The circuit is designed in 0.35 mu m CMOS process. The proposed circuit can measure heart resistance with 10 Omega resolution. The average power consumption is about 3uA under 2.8V supply during the 12ms resistance measurement period. The simulation results show a good linear relation between amplified voltages and heart resistances in the range of 500-4000 Omega.
Year
Venue
Keywords
2016
PROCEEDINGS OF 2016 IEEE BIOMEDICAL CIRCUITS AND SYSTEMS CONFERENCE (BIOCAS)
Heart resistance measurement,switched-capacitor,cardiac pacemaker,electrode lead
Field
DocType
ISSN
Cardiac pacemaker,Computer science,Voltage,Voltage drop,Electronic engineering,Switched capacitor,Cmos process,Electrical engineering,Linear relation,Power consumption,Amplifier
Conference
2163-4025
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Jiangtao Xu13112.56
Jialu Wang253.51
Minshun Wu3255.56
Ruizhi Zhang444.72