001°C_CONTROL_WITH_OPAMP_COMPABA_TOR

Published:2009/7/8 3:27:00 Author:May | From:SeekIC

Uses platinum sensor in bridge configuration, with opamp connected across bridge differentially. When cold, sensor resistance is Iess than 500 ohms so opamp saturates to give positive output that tums on power transistor and heater. As oven warms, sensor resistance increases, brklge balance shifts, and heater is cut off.-J. Williams, Designer's Guide to: Temperature Control, EDNMagazine, June 20, 1977, p 87-95.



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