A 0.5 mu A/Channel front-end for implantable and external ambulatory ECG recorders

作者：Rezaeiyan Yasser; Zamani Milad; Shoaei Omid; Serdijn Wouter A

来源：MICROELECTRONICS JOURNAL, 2018, 74: 79-85.

DOI：10.1016/j.mejo.2018.01.016

• Analog integrated circuits
• Bio-potential amplifier
• Instrumentation amplifier
• Low power
• ECG
• IECG
• Programmable gain amp

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 mu m 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 mu A per channel from a 1 V supply. The input referred noise of the intra-cardiac signal readout channel is 2 mu V-rms.

• 出版日期2018-4