Op-Amp Questions: Buffer Amplifier, CMRR & Applications

[kahei]

What is the use of Buffer connection Amplifier?

What is the common mode rejection ratio? What is the use of this in the op-amp applications, for example in difference amplifier and instrumentation amplifier?

What are the application in Difference amplifier and Instrumentation amplifier?

Thanks.

 

[berkeman]

What is the use of Buffer connection Amplifier?

What is the common mode rejection ratio? What is the use of this in the op-amp applications, for example in difference amplifier and instrumentation amplifier?

What are the application in Difference amplifier and Instrumentation amplifier?

Thanks.

You must show some effort at answering these questions before we can help you. Have you tried looking any of those terms up on www.wikipedia.org or just googling them?