Filtered-sample-and-hold

  
Itis often required that a signal be filtered prior to sampling. This can be accomplished with only one device. Use any of the inverting and noninverting filters that can be built with op amps.
Filtered-sample-and-hold - schematic

However, it is necessary that the sampling switch be closed for a sufficient time for the filter to settle when active filter types are connected around the device.




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