A 0.8-V 420nW CMOS switched-opamp switched-capacitor pacemaker front-end with a new continuous-time CMFB

Author

Daliri, M. ; Maymandi-Nejad, M.

Author_Institution

Electr. Eng. Dept., Ferdowsi Univ. of Mashhad, Mashhad

fYear

2008

fDate

Aug. 31 2008-Sept. 3 2008

Firstpage

758

Lastpage

761

Abstract

A low-voltage low-power pacemaker Front-End for detecting QRS complex is presented in this paper. The circuit includes a switched-opamp switched-capacitor (SO-SC) preamplifier with a gain of 40 db, a fourth-order Butterworth SO-SC filter with a sampling frequency of 1 kHz, and an opamp with a new continuous time common mode feedback (CMFB) circuit which is able to operate with a very low supply voltage. The whole circuit operates with a supply voltage of 0.8 V and consumes a power of 420 nW.

Keywords

CMOS integrated circuits; biomedical equipment; cardiology; circuit feedback; pacemakers; preamplifiers; prosthetics; switched capacitor filters; CMOS switched-opamp switched-capacitor pacemaker; cardiac pacemakers; continuous time common mode feedback circuit; fourth-order Butterworth SO-SC filter; frequency 1 kHz; gain 40 dB; low-power pacemaker front-end; low-voltage pacemaker front-end; power 420 nW; switched-opamp switched-capacitor preamplifier; voltage 0.8 V; Energy consumption; Feedback circuits; Frequency; Heart beat; Low pass filters; Low voltage; Pacemakers; Preamplifiers; Signal to noise ratio; Switching circuits; Butterworth filter; CMOS; Common-Mode Feedback; Continuous- time; Low voltage; Pacemaker; Switched OpAmp; Switched-Capacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2008. ICECS 2008. 15th IEEE International Conference on

Conference_Location

St. Julien´s

Print_ISBN

978-1-4244-2181-7

Electronic_ISBN

978-1-4244-2182-4

Type

conf

DOI

10.1109/ICECS.2008.4674964

Filename

4674964