| CPC G01K 7/20 (2013.01) [G01K 7/42 (2013.01); G01K 2007/163 (2013.01)] | 16 Claims |
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1. A temperature detection circuit for detecting a temperature of an amplifier circuit, the temperature detection circuit comprising:
a first transistor of a bipolar type; and
a second transistor of the bipolar type, wherein
the first transistor and the second transistor form a current mirror circuit, and
the temperature of the amplifier circuit is detected based on a temperature change of the first transistor and the second transistor,
a detector circuit connected to a collector terminal of the second transistor, wherein
the current mirror circuit converts a temperature change of the first transistor and the second transistor into a current, and
the detector circuit converts the current into a voltage,
wherein the detector circuit includes:
a third transistor of the bipolar type, wherein a base terminal of the third transistor is connected to the collector terminal of the second transistor;
a fourth transistor of the bipolar type, wherein a base terminal of the fourth transistor is connected to a collector terminal of the third transistor; and
a fifth transistor of the bipolar type, wherein a base terminal of the fifth transistor is connected to a collector terminal of the fourth transistor, and
the detector circuit converts the current inputted to the base terminal of the third transistor into a voltage at an emitter terminal of the fifth transistor.
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