Strobed Supply Improves Strain Gauge Bridge Efficiency

Published:2012/9/3 2:32:00 Author:Ecco | Keyword: Strobed Supply , Improves, Strain Gauge Bridge , Efficiency | From:SeekIC

The following schematic diagram shows a method to reduce power consumption without sacrificing the bridge signal output level of a strain gauge. Many situation will be applicable for this strain gauge bridge signal conditioning circuit, where continuous output is not a must. In the long time frame, this circuit will in idle state for almost all the time, with only intermittent quick active states (on times). A very extreme example for this signal conditioning circuit is where remote weight or height level of a storage tanks is sampled once per hour. The idle current is around 150 μA, with active state current typically 50 mA (which is occurs at few milliseconds periods). (Source: freecircuitdiagram)



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