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Instrumentation amplifier
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==Types== ===Feedback-free instrumentation amplifier=== '''Feedback-free instrumentation amplifier''' is the high-input-impedance differential amplifier designed without the external feedback network. This allows reduction in the number of amplifiers (one instead of three), reduced noise (no thermal noise is brought on by the feedback resistors) and increased bandwidth (no frequency compensation is needed). Chopper-stabilized (or zero-drift) instrumentation amplifiers such as the [http://www.linear.com/product/LTC2053 LTC2053] use a switching-input frontend to eliminate DC offset errors and drift.
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