A 0.36 mu W/channel recorder for external ambulatory ECG recorders

摘要

There is an increasing demand for long-term ECG monitoring applications which are very low power, small size and capable of wireless data transmission. This paper presents an analog front-end and also modulator for long-term ECG recording purpose. The fully integrated system features three independent channels and a modulator. The analog front-end includes a voltage-to-time conversion and a tunable modulator to achieve a very low power consumption for wireless transmission of the data without analog to digital converter. The proposed system is designed and simulated in a CMOS technology and occupies only . It can record ECG signal with 9.2-bit resolution while consuming only per channel from a 0.9 V supply. Also, it can transmit data consuming just per channel from a 0.9 V supply. The input referred noise of the readout channel is 2.01 mu V-ms .