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Demultiplexer

2017-08-19 22:34  
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This circuit reconstructs and separates analog signals which have been time-division multiplexed. The conventional method, shown on the left, has several restrictions, particularly when a short dwell time and a long, accurate hold time is required. The capacitors must charge from a low-impedance source through the resistance and current-limiting characteristics of the multiplexer. When holding, the high-impedance lines are relatively long and subject to noise pickup and leakage.
Demultiplexer

When FET input buffer amplifiers are used for low leakage applications, severe temperature offset errors are often introduced.



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