D. Denisenko, E. A. Zhebrun, N. Prokopenko, Y. Ivanov
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Modified Low-Frequency Filter for Signal Spectrum Limitation at Analog-Digital Converter’s Input with Differential Input
We have considered a modified architecture of the third order low-frequency filter (LFF), intended to be applied as an anti-alias filter on inputs of analog-digital converters (ADC’s) with differential input. We have obtained conditions for low-frequency filter’s circuit parametrical synthesis. We have shown results of suggested LFF simulation and compared its amplitude-frequency characteristics (AFC’s) at different frequencies of applied operational amplifiers’ (OP-AMP’s) unity gain (AD8132, THS4131).
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