The first stage is a balanced input, balanced output amplifier formed by A1 and A2 which amplifies the differential signal but passes the common mode signal
Inst_Amp.pdf
A Simple Op Amp Subtractor Provides an In-Amp Function The simplest (but still very useful) method of implement- ing a differential gain block is shown in
designers-guide-instrument-amps-chII.pdf
If the input multiplied by the gain is above this value, the op amp will saturate and give an incorrect output Figure 4 LM324 IC 2 Select Resistor Values
ece_480_app_note_justin_bauer.pdf
Thus the overall gain equation for a three op amp instrumentation amplifier with a unity gain difference output stage is:
Burr-Brown%20The%20Instrumentation%20Amplifier%20Handbook.pdf
GAIN Gain Equation (External Resistor Gain Programming) The AD624 is a monolithic instrumentation amplifier based on
0900766b80e38f99.pdf
Instrumentation Amplifier AD524 The AD524 is a precision monolithic instrumentation amplifier Gain Equation (External Resistor Gain Programming)
233358.pdf
general-purpose instrumentation amplifier gain ) and v ref = 0 • The analysis is quite similar to the past few pages
lecture17.pdf