ECG Front End Design - ADS chip selection and design pipeline
Published:
Comprehensive trial on using Texas Instrument produced electrophysiological ampifier to build frontend that collect bio-signals.
Some key design note and personal reflection during design process.
This chip use the driven right leg circuit to do common-mode rejection. Where in my previous project, I use driving right leg, which is a novel variation to DGL circuit.
The chip is not efficient - it use a external oscillator in the design, which cause extra space coverage on the PCB board, as well as a noisy coupling caused by the oscillator. In this process, I refreshed my mind on calculation of loading capacitance.
