Instrumentacijsko EKG pojačalo s istosmjerno vezanim ulaznim stupnjem

undergraduate thesis

• Title (english): DC coupled ECG instrumentation amplifier
• Author: Maja Barić
• Mentor: Ratko Magjarević (mentor)
• Committee member: Ratko Magjarević (predsjednik povjerenstva)
• Committee member: Tihomir Marjanović (član povjerenstva)
• Committee member: Luka Celić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom radu rješavao se problem projektiranja jednokanalnog EKG pojačala. Projektirao se prema ulaznim zahtjevima prema kojima je predviđeno napajanje pojačala baterijom nominalnog napona 3,7 V, mora imati 2 načina rada: dijagnostički (0,05 – 120 Hz) i monitoriranje (1 – 45 Hz), a ulazni filtar mora biti niskopropusni. Kao ulazni filtar odabran je niskopropusni RC filtar. Nakon pojačanja u instrumentacijskom pojačalu, guše se niske frekvencije u Besselovom visokopropusnom filtru. Na kraju se signal dodatno pojačava u neinvertirajućem pojačalu.
Dobiveno je pojačalo karakteristika bliskih zahtijevanim. Izmjeren je EKG na ispitaniku pri čemu je dobiven očekivani signal na izlazu.

Abstract (english)

This thesis is based on a problem of designing a single – channel electrocardiogram. Its design is based on given specifications which include 3,7 V single power supply, low – pass filter in its input stage and ability to work in two different modes chosen by the user: diagnosting mode (0,05 – 120 Hz) and monitoring mode (1 – 45 Hz). The chosen input stage filter is low – pass RC filter. After amplifying the signal in an instrumentation amplifier, low frequencies are attenuated in a high – pass Bessel filter. Finally, the signal is amplified in a non – inverting amplifier.
As a result, the designed ECG amplifier was confirmed to have very close specifications to the ones requested. Finally, ECG was measured on a test subject which resulted in expected output signals.

• Keywords: EKG; instrumentacijsko pojačalo; visokopropusni Besselov filtar; niskopropusni RC filtar; smetnje
• Keywords (english): ECG; instrumentation amplifier; high – pass Bessel filter; low – pass RC filter; noise
• Language: croatian
• URN:NBN: urn:nbn:hr:168:103586
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 07:45:08