Patent ID: 6336593
Filing Date: 2002-01-08
Classification: G05D

Abstract:
An electronic digital thermostat control unit for wide temperature range comprising:a linear temperature sensing element other than pn-junction sensing element; a constant current source to drive the said linear temperature sensing element; an analog-to-digital converter coupled to the output of the said linear temperature sensing element to produce a digital output; a non-volatile memory storing calibration data; a correcting circuit coupled to the analog-to-digital converter for correcting the digital output for sensitivity and offset values of the sensing element using the calibration data stored in the non-volatile memory and generating a corrected output; at least one digital comparator having first and second inputs, the first input coupled to the corrected output from the correcting circuit and the second input coupled to a digital reference value, the digital comparator generating an output when the corrected output matches the digital reference value; and a control latch having an input that is to set and/or reset in response to the output of digital comparator for actuating a load comprising a temperature correction device in a consumer/industrial product.