Patent ID: 7312648
Filing Date: 2007-12-25
Classification: G01K

Abstract:
1. A temperature sensor, comprising: a temperature-dependent element, having an input terminal and an output terminal, the input terminal selectively coupled to one of a first current source and a second current source; a comparator unit, comprising: a first capacitor, coupling between the input terminal of the temperature-dependent element and the first comparator input terminal; a second capacitor, coupling between the output terminal of the temperature-dependent element and the second comparator input terminal; a first switching capacitor, one end of the first switching capacitor being directly connected to the first comparator input terminal, another end of the first switching capacitor being selectively coupled to one of first and second voltages; and a second switching capacitor, one end of the second switching capacitor being directly connected to the second comparator input terminal, another end of the second switching capacitor being selectively coupled to one of third and fourth voltages.