Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1991-08-01
1992-10-27
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
361 55, 361104, 357 28, 307310, H02H 504
Patent
active
051595206
ABSTRACT:
A semiconductor integrated circuit includes a semiconductor chip having a predetermined circuit device and a PN junction diode group formed on the surface thereof. The PN junction diode group is supplied with a constant current in the forward direction, whereby the potential difference between the terminals thereof changes according to the surface temperature of the semiconductor chip. A potential difference generating circuit generates a fixed potential difference corresponding to a predetermined limit temperature of the chip surface, whereby the potential difference between the terminals of the PN junction diode group is compared with the fixed potential difference. As a result, when the determination in made that the temperature of the semiconductor chip surface reaches the limit temperature, the operation of the circuit device is temporarily or completely halted.
REFERENCES:
patent: 4667265 (1987-05-01), Stanojevic et al.
patent: 4760434 (1988-07-01), Tsuzuki et al.
patent: 4924112 (1990-05-01), Anderson et al.
Shibata Yoshiki
Toyooka Tamotsu
Conlin David G.
O'Connell Robert F.
Pellinen A. D.
Schultz C.
Sharp Kabushiki Kaisha
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