title: An ECG recording front-end with continuous-time level-crossing sampling.
abstract: An ECG recording front-end with a continuous- time asynchronous level-crossing analog-to-digital converter (LC-ADC) is proposed. The system is a voltage and current mixed-mode system, which comprises a low noise amplifier (LNA), a programmable voltage-to-current converter (PVCC) as a programmable gain amplifier (PGA) and an LC-ADC with calibration DACs and an RC oscillator. The LNA shows an input referred noise of 3.77 μVrms over 0.06 Hz-950 Hz bandwidth. The total harmonic distortion (THD) of the LNA is 0.15% for a 10 mVPP input. The ECG front-end consumes 8.49 μW from a 1 V supply and achieves an ENOB up to 8 bits. The core area of the proposed front-end is 690 ×710 μm2, fabricated in a 0.18 μm CMOS technology.
authors.forename: Yongjia
authors.initials: Y
authors.lastname: Li
authors.forename: Andre L
authors.initials: AL
authors.lastname: Mansano
authors.forename: Yuan
authors.initials: Y
authors.lastname: Yuan
authors.forename: Duan
authors.initials: D
authors.lastname: Zhao
authors.forename: Wouter A
authors.initials: WA
authors.lastname: Serdijn
mesh_terms: D004562:Electrocardiography / Q000379:methods*; D004867:Equipment Design; D006801:Humans; D012815:Signal Processing, Computer-Assisted