Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1998-01-14
1999-11-30
Gutierrez, Diego
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374 1, G01K 1500, G01K 701
Patent
active
059930608
ABSTRACT:
In a temperature sensor, between a first power supply and a second power supply, there are disposed a resistor group consisting of a plurality of resistors connected in series and a MOS transistor in the form of a temperature transducer, the resistor group being connected in series with the MOS transistor having a drain connected to the resistor group and having a source and a bulk which are connected to the first power supply. The temperature sensor further comprises a switch group consisting of switches for opening and closing the connections between the connection points of the adjacent resistors of the resistor group and the second power supply, an external terminal connected to the drain of the MOS transistor, a temperature-compensated constant voltage generating circuit for generating a gate voltage as an output voltage to the MOS transistor, and a non-volatile memory which stores therein data for adjusting the output voltage from the temperature-compensated constant voltage generating circuit and the state of opening and closing of the switches of the switch group. With the voltage at the second power supply as the reference, the drain voltage at the MOS transistor is output as temperature information to the external terminal.
REFERENCES:
patent: 4395139 (1983-07-01), Namiki et al.
patent: 5051615 (1991-09-01), Rosenthal
patent: 5315280 (1994-05-01), Cordoba et al.
patent: 5645352 (1997-07-01), Menten
Citizen Watch Co. Ltd.
Gutierrez Diego
Verbitsky G.
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