A 0.5 μA/Channel front-end for implantable and external ambulatory ECG recorders. (April 2018)

• Record Type: Journal Article
• Authors: Rezaeiyan, Yasser; Zamani, Milad; Shoaei, Omid; Serdijn, Wouter A.
• Is Part Of: Microelectronics journal. Volume 74(2018)
• Page Start: 79
• Page End: 85
• Publication Date: 2018-04
• Subjects: Analog integrated circuits -- Bio-potential amplifier -- Instrumentation amplifier -- Low power -- ECG -- IECG -- Programmable gain amp; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2018.01.016
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: There is an increasing demand for low power, low voltage, and small size analog readout bio-potential systems. This paper presents an analog front-end for measuring the intra-cardiac signals in implantable and also external ambulatory ECG cardiac recording applications. The analog front-end benefits from voltage to frequency conversion without conventional analog to digital conversion and thereby achieves a very low power consumption. The frequency averaging digital reconstruction makes an intrinsic low pass filter of which the cut-off frequency changes with the averaging interval and eliminates the need for an analog filter in this system. Furthermore, this feature enables the development of a general purpose analog readout bio-potential measurement system with programmable bandwidth. The proposed IC is fabricated in a 0.18 μm CMOS process and occupies 0.396 mm 2 . It can measure intra-cardiac bio-potentials with 9.2-bit resolution while consuming just 0.5 μA per channel from a 1 V supply. The input referred noise of the intra-cardiac signal readout channel is 2 μVrms .