Patent ID: 6847254
Filing Date: 2005-01-25
Classification: G05F

Abstract:
1. A temperature detector circuit for generating an output when a target temperature is reached, the temperature detector circuit comprising: a first current source for generating a first PTAT current which is a first reference current at a reference temperature; a second current source connected in series to the first current source through a node and supplied with a temperature-independent reference voltage for generating a second current proportional to the reference voltage, which is a second reference current at the reference temperature; wherein the first and second current sources are configured such that a ratio of the second reference current to the first reference current is proportional to a ratio of the target temperature to the reference temperature; and, an output stage connected to the node for producing the output, wherein the output stage includes: a MOS transistor having a gate connected to the node, a drain connected to a current path, and a source connected to a low voltage; a capacitor connected between the node and source; and a buffer connected to the drain for providing the output.