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Old 30th December 2007, 01:17 AM   (permalink)
Default Design review

Hello,

I've just finished designing a control circuit for the microheater - tiny strip of aluminum which goes linearly from ~200ohms at room temperature to ~450ohms at 200C. The thing works fine; however, since small signal stuff is not exactly my cup of tea I'd like to humbly ask a favor from all of you knowledgeable folks to take a look at it and tell me what you think.

IC1 is a 10bit DAC, IC2 changes DAC range and adds DC offset, IC3 watches the heater. VDD is 5V.

Thank you,
Oleg.
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