Institute of Research and Journals (IRAJ)
In this paper, the authors have describes the design of Current Mode Instrumentation Amplifier (CMIA) for bio-signal acquisition system. The current mode instrumentation amplifier technology is based on voltage mode operational amplifier (op-amp) power supply current sensing technique. There are two design challenges of this topology. First one is the op-amp mismatch and second is precise current mirrors. A new low-voltage single-power high CMRR and PSRR instrumentation amplifier is developed for medical applications. This proposed circuit uses a new structure to solve the general circuit's problems.