Title :
A micro-power low noise log-domain amplifier for the sensing chain of a cardiac pacemaker
Author :
Gerosa, A. ; Novo, A. ; Mengalli, A. ; Neviani, A.
Author_Institution :
Dipartimento di Elettronica e Inf., Padova Univ., Italy
Abstract :
This work proposes a low-noise amplifier for the acquisition of the cardiac signal in a pacemaker. The application calls for very low power, low voltage and highly integrated solutions. These targets are achieved realizing the amplifier as a class AB log-domain 2nd order band-pass filter, using pure CMOS 0.8 μm technology, with devices operating in weak inversion. The amplifier provides a programmable gain from 50 dB to 70 dB, presents an input-referred noise of 1.7 μVrms, dissipates at most 2.8 μW and is fully integrated
Keywords :
CMOS analogue integrated circuits; active filters; feedback amplifiers; integrated circuit noise; low-power electronics; pacemakers; 0.8 micron; 2.8 muW; 50 to 70 dB; CMOS; cardiac pacemaker; cardiac signal; class AB log-domain 2nd order band-pass filter; input-referred noise; micro-power low noise log-domain amplifier; programmable gain; sensing chain; weak inversion; Band pass filters; CMOS technology; Circuits; Digital filters; Filtering; Heart; Low voltage; Low-noise amplifiers; Pacemakers; Signal processing;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921851
