SEMICONDUCTOR TEMPERATURE SENSOR CIRCUIT, METHOD FOR ADJUSTING SAME, AND SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a highly accurate temperature sensor circuit capable of operating in a fine process on a low power voltage. SOLUTION: When a drain current IOUT1of a second MOSFET 2 and a sum value IOUT2of a drain current of a third MOSFET 3 and a drain current of a fourth MOSFET 4 is equal to each other, temperature is detected on the basis of an output voltage VOUTof a transistor circuit. An operating point shift circuit 25 for shifting an operating point which occurs only at the drain current IOUT2of the third MOSFET 3 is provided. The operating point shift circuit 25 comprises the fourth MOSFET 4 connected to the third MOSFET 3 in parallel and a voltage supply source 14 for supplying the fourth MOSFET 4 with a gate voltage which makes the fourth MOSFET 4 operate in a saturation region. COPYRIGHT: (C)2007,JPO&INPIT