1. Draw the schematic diagram of the classic three op-amp instrumentation amplifier. Tell me what the first stage does to the differential and common-mode signals
2. Why does the instrumentation amplifier have more than one stage?
3. You have designed a simple op-amp circuit for a particular application. During your initial testing, you fi nd that the op amp is very hot to the touch. Assuming that the circuit has been correctly breadboarded, what is the most likely problem and what can you do to correct it?