LM334 based tempreature gain circuit

[james]

Hi,

Thanks for the schematic for a circuit to do the job, certainly a lot
simplier than the multiple opamp and thermistor version.

I have decided to base the circuit on this design, but I have a couple of
queries.

The schematic specifies LM334 as the temp sensor, however upon looking at
the datasheet these sensors only have a operating range of 0deg to +70deg c.
The
required circuit operated beyond these ranges!

Does the LM334 not require an adjustment input, the sensor is a three wire
unit - or is two wire input ok?

Regards

 

[Fred Bloggs]

How many times are you going to post this? I answered under your
"Control of heater circuit part2" thread.

Hi,

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