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thermocouple circuit needed

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thermocouple at nhsouth

hi
I want to design a circuit to read and amplify the K or J type thermocouple with simple opamp (not use special IC such as AD595 or etc.)
thanks
 

This is a minimal thermocouple schematic. An op amp amplifies the tiny voltage that is created when one of the two thermocouple wire junctions is hotter than the other.
Click to expand...
As opamp you can use the very popular CA3130/CA3140 ..
Another example ( http://www.nhsouth.com/crafts/workbench/thermocpl.htm ) shows you practical application of thermocouple/opamp(s) based temperature control circuit ..

Regards,
IanP
 

any one have a circuit for use thermocouple.
this circuit join with termistor.
thanks
 

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