Patent ID: 9667259
Date: 2017-05-30
CPC Classifications: G01K,G05F,H03K,H03L

Claim:
1. An apparatus for generating a temperature-dependent control signal, the apparatus comprising; a current-to-voltage converter arranged to receive a temperature-dependent current which varies with temperature according to a selected one of two or more temperature coefficient factors and to convert the received temperature-dependent current to a temperature-dependent voltage, a comparator arranged to receive the temperature-dependent voltage and to compare the received temperature-dependent voltage with a reference voltage and to generate a switching signal at an output of the comparator when the received temperature-dependent voltage reaches a pre-set value relative to said reference voltage, and a control module operably coupled to the output of the comparator and arranged to generate a selection signal for selecting a different one of said two or more temperature coefficient factors when a switching signal is received from the comparator, whereby a temperature-dependent control signal comprising a multi-slope temperature dependent voltage is generated at the output of the current-to-voltage converter.