Patent ID: 7661879
Filing Date: 2010-02-16
Classification: G01K

Abstract:
1. An apparatus for detecting temperature using transistors, comprising: a plurality of temperature detecting units that become selectively active according to predetermined temperature intervals; and a pulse generating unit that sets prescribed pulse widths to the temperature intervals detected by the plurality of temperature detecting units, generates pulse of the prescribed width according to a signal transmitted by an active temperature detecting unit among the plurality of temperature detecting units, and outputs the pulse, wherein the plurality of temperature detecting units detect different temperature intervals, respectively and only the temperature detecting unit having the temperature interval including a present temperature is active, wherein each of the plurality of temperature detecting units includes: a first temperature detecting section that generates an enable signal at the lower temperature limit or above in a set temperature interval; a second temperature detecting section that generates an enable signal at the upper temperature limit or below in the set temperature interval; and a signal generating section that extracts overlapping intervals between a voltage level of the enable signal from the first temperature detecting section and a voltage level of the enable signal output from the second temperature detecting section and generates an output signal.