Patent ID: 6882213
Filing Date: 2005-04-19
Classification: G01K

Abstract:
1. A temperature detection circuit comprising: an OP amp for receiving a band gap reference voltage and a first voltage; a reference current generator for generating the first voltage and a reference voltage signal in response to an output signal of the OP amp, wherein the reference current generator comprises a first PMOS transistor comprising a source connected to a power supply voltage and a gate connected to an output terminal of the OP amp, and first to third resistors connected in series between the first PMOS transistor and the ground voltage, a voltage level between the first resistor and the second resistor being the first voltage; a temperature detection voltage generator for generating a temperature detection voltage in response to an ambient temperature and the output signal of the OP amp; and a comparator for comparing the reference voltage signal with the temperature detection voltage signal to generate a temperature control signal.