REZEROING_AMPLIFIER

Published:2009/7/14 4:55:00 Author:May | From:SeekIC

Used where input signal has unknown and variable DG offset, as in telemetry applications. Rezero command line is enabled while ground reference signal is applied to input, making C1 charge to level proportional to DC offset of system. When rezero line is deactivated, amplifier becomes conventional inverter, subtracting system offset and giving true ground-referenced output. For 10-V full-scale system requiring 0.1% (10-mV) accuracy, amplifier needs rezeroing reference every 100 ms.- Linear Applications, Vol. 1, National Semiconductor, Santa Clara, CA, 1973, AN-63, p 1-12.



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