Title :
A variable bandwidth amplifier for a dual-mode low-power ΔΣ modulator in cardiac pacemaker system
Author :
Yeknami, Ali Fazli ; Alvandpour, Atila
Author_Institution :
Dept. of Electr. Eng., Linkoping Univ., Linkoping, Sweden
Abstract :
This paper presents the design and implementation of a variable bandwidth amplifier intended for ultra-low-power biomedical implants in 65nm CMOS, providing tunable gain-bandwidth in three modes: 0.9 MHz, 1.7 MHz, and 2.3 MHz with consistent 56 dB DC gain. The amplifier consumes 180nW static power in the lowest bandwidth mode, and consumes 315 nW static power in the full bandwidth mode with an 8 pF load from a 0.9-V supply voltage. To illustrate the concept, the presented programmable bandwidth amplifier is applied in a dual-mode ΔΣ modulator aiming for sensing/measuring stage of a cardiac pacemaker.
Keywords :
CMOS integrated circuits; amplifiers; cardiology; low-power electronics; modulators; pacemakers; CMOS; amplifier static power consumption; cardiac pacemaker system; consistent DC gain; dual-mode low-power Delta-Sigma modulator; frequency 0.9 MHz; frequency 1.7 MHz; frequency 2.3 MHz; gain 56 dB; power 180 nW; power 315 nW; programmable bandwidth amplifier; sensing-measuring stage; size 65 nm; supply voltage; tunable gain-bandwidth mode; ultralow-power biomedical implant; variable bandwidth amplifier; voltage 0.9 V; Bandwidth; CMOS integrated circuits; Capacitance; Gain; Modulation; Noise; Pacemakers;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6572242
