초록 ▼

The temperature sensing circuit includes a source of constant current IS, a voltage divider R1, R2 and an output transistor T1 whose base collector circuit is connected parallel to the first resistor and whose base emitter circuit is connected parallel to the second resistor. An auxiliary source of

The temperature sensing circuit includes a source of constant current IS, a voltage divider R1, R2 and an output transistor T1 whose base collector circuit is connected parallel to the first resistor and whose base emitter circuit is connected parallel to the second resistor. An auxiliary source of current having a positive temperature coefficient is connected in series with the first resistor of the voltage divider to cause a voltage drop thereon having an opposite temperature coefficient than the output voltage US generated at the collector-emitter circuit of the output transistor.

대표청구항 ▼

A temperature sensing circuit for generating an output voltage indicative of temperature, comprising a source of a substantially constant current, an ohmic voltage divider having a first resistor having a first value and a second resistor having a second value and connected in series with said const

A temperature sensing circuit for generating an output voltage indicative of temperature, comprising a source of a substantially constant current, an ohmic voltage divider having a first resistor having a first value and a second resistor having a second value and connected in series with said constant current source, a first transistor whose base-collector circuit is connected parallel to said first resistor and whose base-emitter circuit is connected parallel to said second resistor, said first transistor generating across its collector-emitter circuit an output voltage including an initial voltage component having a positive or a negative temperature coefficient, a source of an auxiliary current attached to the base of said transistor and to said second resistor, the auxiliary current source having an opposite temperature coefficient than that of the initial voltage component to generate across said first resistor an auxiliary voltage component having said opposite temperature coefficient, said auxiliary voltage component combining with said initial voltage component to generate a temperature indicating output voltage whose temperature coefficient corresponds to the combined temperature coefficients of said voltage components.