Temperature detecting apparatus
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United States of America Patent
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May 25, 1982
Grant Date -
N/A
app pub date -
Aug 24, 1979
filing date -
Aug 24, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A temperature detecting apparatus having a first transistor connected in diode configuration or a first diode, with its forward current set in certain value. A second transistor has similar electrical characteristics as the first transistor or the first diode, with the anode or cathode of the first transistor or the first diode being connected to the base of the second transistor. The temperature difference between the first transistor or the first diode and the second transistor is detected by means of the variation of the collector current of the second transistor. In another embodiment, a third transistor matched to second one is used with common base connections. The first transistor is coupled to the common base coupling.
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