Temperature detecting apparatus

Details Temperature detecting apparatus Temperature detecting apparatus

1979-08-24

1982-05-25

Miller, Jr., Stanley D.

Communications: electrical

Condition responsive indicating system

Specific condition

328 8, 340589, 307310, 374169, 374178, G01K 700, H03K 326, G01K 310

Patent

active

043318886

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.

REFERENCES:
patent: 3809929 (1974-05-01), Vittoz
patent: 4004462 (1977-01-01), Dobkin
patent: 4071813 (1978-01-01), Dobkin

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