Patent ID: 8451047
Filing Date: 2013-05-28
Classification: G01K

Abstract:
1. A circuit used for indicating process corner and extreme temperature, comprising: a proportional to absolute temperature (PTAT) current source, having an output terminal, used for providing a current (I a negative to absolute temperature (NTAT) current source, having an output terminal, used for providing a current (I a constant to absolute temperature (CTAT) current source, having an output terminal, used for providing a current (I a corner detector, having an input terminal and an output terminal, the input terminal electrically connected to the output terminal of the constant to absolute temperature (CTAT) current source, used for indicating a detected corner state; a poly detector, having a first input terminal, a second input terminal, a third input terminal and an output terminal, the first input terminal electrically connected to the output terminal of the proportional to absolute temperature (PTAT) current source, the second input terminal electrically connected to the output terminal of the negative to absolute temperature (NTAT) current source, and the third input terminal electrically connected to the output terminal of the constant to absolute temperature (CTAT) current source, used for indicating a detected poly state; and an extreme temperature detector, having a first input terminal, a second input terminal, and an output terminal, the first input terminal electrically connected to the output terminal of the proportional to absolute temperature (PTAT) current source, and the second input terminal electrically connected to the output terminal of the poly detector, used for indicating a detected temperature state.