HIGH_GAN_FOR_WEAK_SIGNALS

Published:2009/7/8 22:46:00 Author:May | From:SeekIC

NationaI LM121 differential amplifier is operated openloop as input stage for input signals up to ±10 mV. Input voltage is converted to differential output current for driving opamp acting as current-to-voltage converter with single-ended output. R4 is adjusted to set gain at 1000. Null pot R3 serves for offset adjustment. - Linear Applications, Vol, 2, National Semiconductor, Santa Clara, CA, 1976, AN-79, p 7-8.



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