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Hi guys
What's the difference between bias voltage and reference voltage. Are these terms interchangeable at all? I do understand bias can be any voltage level and also reference voltage can be any voltage, is it right or only 5 v supply is considered reference voltage?
A1 mechanical wrote: Hi guys
What's the difference between bias voltage and reference voltage. Are these terms interchangeable at all? I do understand bias can be any voltage level and also reference voltage can be any voltage, is it right or only 5 v supply is considered reference voltage?
Thanks in advance
A Refrence voltage is really a tightly controlled 5v power supply voltage. Effective a 5v refrence circuit is a power supply bus (a bit like a ring main in house wiring) that can be shared across several sensors.
A bias voltage circuit passes through a very high ressistance to check circuit continuity and ressistance. As the circuit is very high resistance a bias voltage cannot supply power.
It works in a similar way to measuring ressistance with multimeter the current involved is so tiny it is insignificant
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Last edit: 4 years 5 months ago by Andy.MacFadyen.
