Ultralow-power Analog Front-End IC Design for an Implantable Cardioverter Defibrillator (ICD)
This work proposes novel ultralow-power system and circuit designs and trade-offs on the analog frontend integrated circuit (IC) for an implantable cardioverter defibrillators (ICD). The major frontend analog IC includes pre-amplifier, filters, variable-gain-amplifier (VGA) and analog-to-digital converter (ADC). The pre-amplifier is designed with low-noise bipolar (BJT) transistors; filters are designed with both the switch-capacitor (SC) and the gm-C topology for comparison. The VGA includes a high-pass filter (HPF) and a DC shifter designed with a differential difference amplifier (DDA). A successive-approximation-register (SAR) ADC with a novel digital-to-analog converter (DAC) design is used to digitize signals and to reduce SAR ADCs input capacitance by half. The preliminary SPICE simulation of the entire front-end IC suggests it can effectively filter out undesired T-wave in patients electrogram (EGM) to enable proper heartbeat detection.
implantable cardioverter defibrillators (ICD), ultra-lowpower gm-C filter switch-capacitor filter SAR ADC
Weibo Hu Yen-Ting Liu Tam Nguyen Bosco Dsouza Donald Y.C. Lie
Department of Electrical and Computer Engineering, Texas Tech University (TTU), Lubbock TX Department of Electrical and Computer Engineering, Texas Tech University (TTU), Lubbock TX Departmen
国际会议
2011 IEEE 9th International Conference on ASIC(2011年第九届IEEE国际专用集成电路大会)
厦门
英文
1095-1098
2011-10-25（万方平台首次上网日期，不代表论文的发表时间）