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The amplifier input impedance is giving me a headache even I looked for answer from these two posts:
First of all the situation is for receiver end not transmitter. My question begins with the unfinished...
Is there a clear definition difference between these two amplifiers? I know input impedance of INA is large and usually do not need matching but why can't it be low noise? Does impedance matching helping LNA achieve low noise effect? Can LNA be used for low frequency (below 100Hz) high...