Improvement over conventional Instrumentation amplifier .

[abhingd]

Improvement over conventional Instrumentation amplifier by reducing number of resister and high CMRR and Gain.i want to improve conventional Instrumentation amplifier by using current mirror circuit which reducing resister count . i working in CMOS 0.18µm technology.i am uploading Instrumentation amplifier below.

 

[dick_freebird]

Current mirrors and resistors do not perform the same function.
In this case you want very well matched and very linear,
cross a wide range of conditions, resistors.

0.18um technology will give you an instrumentation amp
that can only handle a couple of volts at the input. Not
very useful for a lot of the things people want an IA
for (large-ish common mode offsets, tolerant of high
difference voltages).

So I question whether, even given whatever improvement
you think you could make, this exercise has much value.

 

[abhingd]

i am using this Instrumentation amplifier in bio medical application for ECG signals.
what should i do?

 

[Dominik Przyborowski]

Try to interest with DDA/FDDA circuits.