Design Strategies for Multi-Channel Low-Noise Recording Systems

With the advance in technology simultaneous recording of bio-signals from a large number of recording sites has become possible using multi-channel low-noise recording systems. However, the design of such systems poses a challenge, as operation at low power, provision of high gain in the presence of input offset voltages and excellent noise performance are mandatory. This paper highlights design strategies for recording system optimization and compares the performance of actual system implementations with the best-case performance achievable in theory. Special consideration is given to the noise vs. power and offset-tolerance vs. noise trade-off