Integrated temperature sensor structure
A temperature sensor and temperature-dependent technology, applied in thermometers, instruments, scientific instruments, etc., can solve the problems of low structural precision, no driving ability, and large deviation with the process of integrated temperature sensors, and achieve good linearity and adjustable output range , the effect of wide measurement range
Pending Publication Date: 2017-10-24
CHENGDU ANALOG CIRCUIT TECH INC
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Problems solved by technology
The existing integrated temperature sensor has low structural accuracy, large deviation with the process and no driving ability
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[0013] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0014] Such as figure 1 as shown, figure 1 It is a structural diagram of the integrated temperature sensor structure of the present invention, which includes a positive temperature current source I PTAT , and positive temperature current source I PTAT connected to a zero-temperature current source I ZATA and with a positive temperature current source I PTAT with zero temperature current source I ZATA Connected transimpedance amplifier module.
[0015] Among them, the positive temperature current source I PTAT By the BE junction voltage difference ΔV of the two transistors BE and the first resistance is generated, and the positive temperature current source I PTAT The magnitude of the generated current is proportional to the temperat...
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The invention discloses an integrated temperature sensor structure, which comprises a positive temperature current source, a zero temperature current source connected with the positive temperature current source and a trans-impedance amplification module connected with the positive temperature current source and the zero temperature current source, and is characterized in that current generated by positive temperature current source is in direct proportion to variations of the temperature, current generated by the zero temperature current source is constant along with variations of the temperature, the positive temperature current source is generated by a BE junction voltage difference and first resistance of two triodes, the zero temperature current source is generated by reference voltage and second resistance, the trans-impedance amplification module comprises an adjustable resistor and an amplifier, and an output end of the trans-impedance amplification module outputs voltage signals. The integrated temperature sensor structure has the advantages of high precision, low process dependence, wide measuring range, good linearity and adjustable output range.
Description
technical field [0001] The invention relates to the field of integrated circuits, in particular to an integrated temperature sensor structure. Background technique [0002] Since Galileo invented the thermometer in the 17th century, people began to use temperature to measure. The sensor that really converts temperature into an electrical signal was invented by the German physicist Saibei in 1821. This is the later thermocouple sensor. 50 years later, another German, Siemens, invented the platinum resistance thermometer. In this century, according to the interaction between waves and matter, acoustic temperature sensors, infrared sensors and microwave sensors have been successively developed. With the support of semiconductor technology, semiconductor thermocouple sensors, PN junction temperature sensors and integrated temperature sensors have been developed successively. [0003] Modern temperature sensors occupy the largest market share in the sensor market and are widely...
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IPC IPC(8): G01K7/01
CPCG01K7/01
Inventor 连颖
Owner CHENGDU ANALOG CIRCUIT TECH INC