Arthur J. Kalb

Interference-immune diagnostic quality ECG recording for patient monitoring applications

This paper describes an ECG measurement channel capable of providing diagnostic quality readouts for patient monitoring. Each channel can provide 21-bit output at either 300 SPS or 600 SPS. The noise per channel is approximately 1.2 pVrms. For robust use in the face of severe interference, the input dynamic range is greater than ±1 V with an overload recovery time of approximately 12 ms. Input bias currents are maintained below 150 pA in order not to interfere with other monitoring functions. Five ECG channels have been implemented per patient monitoring integrated circuit and performance is reported.