TEMPERATURE CONTROL CIRCUIT WITH ZERO AVERAGE TEMPERATURE OFFSET ERROR
A temperature sensing circuit generates a voltage proportional to the difference between a controlled temperature and a predetermined reference temperature. The voltage is integrated in an integrating amplifier whereby average temperature offset error is reduced to zero. The integrated voltage is co...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A temperature sensing circuit generates a voltage proportional to the difference between a controlled temperature and a predetermined reference temperature. The voltage is integrated in an integrating amplifier whereby average temperature offset error is reduced to zero. The integrated voltage is compared to a reference potential in a comparator to generate a control signal when the integrated voltage exceeds the reference potential. The control signal operates a switching device through which electrical power is conducted to a heater whereby the controlled temperature is established. |
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