Patent ID: 7994455
Filing Date: 2011-08-09
Classification: A45D,H05B

Abstract:
1. An accelerated initial heating control circuit comprising: a comparator that compares a sensing voltage on a first input to a reference voltage on a second input to generate a compare output; a voltage divider between a power supply and a ground node, the voltage divider generating a first reference voltage and a second reference voltage; a sensing switch for connecting the first reference voltage to the second input of the comparator in response to a heat-up signal being in a first state, and for connecting the second reference voltage to the second input of the comparator in response to the heat-up signal being in a second state; a temperature setting selector that detects power through a heating element, for generating the heat-up signal in the first state when power detected is above a threshold power, and for generating the heat-up signal in the second state when power detected is below the threshold power; and a temperature-sampling switch coupled between the heating element and the comparator, for disconnecting the heating element from the first input of the comparator when the heating element is being heated, and for connecting the heating element to the first input of the comparator when the heating element is being sensed for temperature measurement.