Europaisches Patentamt
European Patent Office
© Publication number:
Office europeen des brevets
EUROPEAN
PATENT
561
APPLICATION
mt ci s H02H
© Application number: 92106613.0
0 511
5/04
@ Date of filing: 16.04.92
©
© Applicant: SGS-THOMSON
MICROELECTRONICS s.r.l.
Via C. Olivetti, 2
1-20041 Agrate Brianza Milano(IT)
Priority: 30.04.91 IT T091 0320
@ Date of publication of application:
04.11.92 Bulletin 92/45
©
Designated Contracting States:
DE FR GB NL SE
©
Date of deferred publication of the search report:
31.03.93 Bulletin 93/13
@ Inventor: Marchio", Fabio
Via S. Remigio, 6/b
1-20018 Sedriano(IT)
Inventor: Pennisi, Alessio
Via Alcuino, 5
1-20149 Milano(IT)
Inventor: Rossi, Giorgio
Via S. Isidoro, 4
1-20014 Nerviano(IT)
©
Representative: Cerbaro, Elena et al
c/o Studio Torta, Via Viotti 9
1-10121 Torino (IT)
© Thermal protective device.
00
CO
© A thermal protective device comprising a bandgap voltage source (11) and a comparator (12). The
voltage source (11) presents two output terminals
(15, 16) at which are respectively present a
temperature-stable voltage (VREF) and a voltage (V2)
increasing with temperature. Below a predetermined
temperature value, the variable voltage is lower than
the stable voltage; but, when the ambient temperature reaches a predetermined value, both voltages
are equal. The above voltages are supplied to the
input of the comparator (12), the output of which
supplies a maximum permissible temperature signal,
when the variable voltage equals the temperaturestable voltage.
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EUROPEAN SEARCH REPORT
EP
DOCUMENTS CONSIDERED TO BE RELEVANT
citation ot document with indication, where appropriate,
Relevant
category
of relevant passages
to claim
IBM TECHNICAL DISCLOSURE BULLETIN,
1-12
vol. 22, no. 8B, January 1980, NEW YORK US
pages 37193719 - 3721
D.AZZIS ' I n t e g r a t e d Circuit f o r
Temperature Sensing and Thermal Alarm1
* the whole document *
92 10 6613
CLASSIFICATION OF THE
APPLICATION ant. C1.S )
H02H5/04
EP-A-0 384 900 (SGS-THOMSON
MICROELECTRONICS)
* abstract *
TECHNICAL FIELDS
SEARCHED ant. C1.5 )
H02H
G01K
ine present search report has been drawn up for all claims
nskc ui icavi
u» ot conpiemmorim leva
THE HAGUE
03 FEBRUARY 1993
particularly relevant it ianen alone
'l :: particularly
relevant if combined with another
document of the same category
:
l technological background
) : non-written disclosure
' : intermediate document
LIBBERECHT L.A.
I : theory or principle underlying the invention
E : earlier patent document, but published on, or
after the filing date
D: document cited in the application
L: document dted for other reasons
&: member of the same patent family, corresponding
document