| ??? 09/20/06 00:02 Read: times |
#124628 - Check. Responding to: ???'s previous message |
Erik Malund said:
I worked for a major scale manufacturer and for those 600.000 economy scales we used a chopper stabilized op-amp, nothing less (cheaper) would do.
Bear in mind that there are other types of load cell than strain gauge ones, like piezo, or LVDT based, or capacitance. None of these would need a chopper amp. The Piezo needs a charge amp, and the other two are AC excited anyway. Steve |
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