CN2869815Y - Circuit for detecting chip temperature in safety chip - Google Patents
Circuit for detecting chip temperature in safety chip Download PDFInfo
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- CN2869815Y CN2869815Y CN 200520064658 CN200520064658U CN2869815Y CN 2869815 Y CN2869815 Y CN 2869815Y CN 200520064658 CN200520064658 CN 200520064658 CN 200520064658 U CN200520064658 U CN 200520064658U CN 2869815 Y CN2869815 Y CN 2869815Y
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Abstract
The utility model discloses a circuit detecting the temperature of chips in safety chips. The circuit, positioned in a safety chip, comprises at least a current source which is externally connected with an external power supply and exports a certain constant electric current; a triode which is designed to sense the variation of ambient temperature, the base electrode and the emitting electrode are connected with a voltage signal output that comprises temperature data; a judgment & processing circuit which senses the voltage signal comprising the temperature data and sends out the control instruction to the external circuit for taking protective measures of kernel data in the case that the ambient temperature exceeds the predetermined value. The utility model circuit, employing a temperature probe circuit in the chip circuit, can protect the safety data in time in the event that the temperature is detected to be offensive, making the temperature assault unable to realize at all.
Description
Technical field
The utility model relates to a kind of chip technology of integrated circuit, the circuit arrangement that temperature is surveyed that prevents in particular a kind of safety chip that temperature from attacking.
Background technology
Integrated circuit of the prior art (IC) has been widely used in each information carrier field, but in the use of reality, the performance of chip is subjected to Effect of Environmental very big, such as being subjected to Temperature Influence, and the influence of this environment sometimes even can make the chip can not operate as normal.Because a lot of critical information are saved in the integrated circuit, as information such as Bank Account Number and passwords, the perhaps information of individual privacy, the security of this information is extremely important, but chip cisco unity malfunction under some Effect of Environmental, the assailant can seize the opportunity and adjust the function that temperature is selected chip, carries out aggressiveness and surveys, and the information security in the chip is on the hazard.
Attack technology can be divided into two big classes according to the physical package of whether destroying chip: the destructive attack and the non-destructive attack.But along with the development of reverse engineering technology after the development of technology, the particularly nineties, the core data and the information that are kept among the IC can obtain by the reverse engineering technology by certain technological means.But the enforcement of reverse engineering needs the very knowledge and the extremely expensive instrumentation of specialty, these can not reach for general assailant, so at present owing to the restriction of knowledge and equipment, the suffered attack of chip threatens mainly attacks from non-destructive.
The non-destructive attack means mainly comprises software attacks, eavesdropping technology and fault generating technique etc.Software attacks is used the general-purpose communication interface of microprocessor, the weakness of seeking security protocol, cryptographic algorithm and their physics realization aspect; The eavesdropping technology adopts the method for high time domain precision, the simulation feature of the various electromagnetic radiation that the analysis power interface produces in the microprocessor course of normal operation; The fault generating technique makes processor produce fault, thereby obtains extra visit approach by producing unusual applied environment condition.Wherein, temperature is surveyed one type that just belongs to the fault generating technique, the part of devices that the assailant can make the temperature of chip raise in chip can not operate as normal, makes the processor of chip internal produce fault, thus can obtain to the extra access of chip by way of.Therefore, survey attack at this kind temperature, hygrosensor is set in chip is very important, to strengthen the security of chip, the scheme that hygrosensor is set in the current chip is not also seen in disclosed technology.
The utility model content
The purpose of this utility model is to provide the circuit of detection chip temperature in a kind of safety chip; temperature attack pattern at prior art; one hygrosensor circuit is set; output signal by hygrosensor is in time reset to core data; to realize effective protection to important core data; prevent mode that disabled user's serviceability temperature is attacked obtain extra visit by way of, thereby protect important secure data.
The technical solution of the utility model is as follows:
The circuit of detection chip temperature in a kind of safety chip, wherein, this circuit is arranged at a safety chip inside, comprises at least: a current source, a triode and a judgment processing circuit; This current source output terminal is connected with base stage with the collector of described triode, and is connected to the input end of judgment processing circuit; Described current source is used for external external power source, and exports one and determine constant electric current; Described triode is used for sense ambient temperature and changes, and its base stage is connected the voltage signal that output contains temperature information with emitter; Described judgment processing circuit is used to experience this voltage signal that contains temperature information and to the external circuit sending controling instruction, after environment temperature surpasses predetermined value core data is taked safeguard measure.
Described circuit, wherein, described judgment processing circuit also comprises a comparer, the collector of described current source output terminal and described triode and an input end that is connected to comparer after base stage is connected, an other end of comparer connects reference voltage simultaneously; Described comparer is used to receive imports this comparer with a described voltage signal and a reference voltage that contains temperature information, is used for whether being higher than described reference voltage according to described voltage signal the output steering order.
Described circuit, wherein, described judgment processing circuit also comprises a voltage-controlled oscillator and a frequency detection circuit; The collector of described current source output terminal and described triode and the input control end that is connected to described voltage-controlled oscillator after base stage is connected, the output terminal of described voltage-controlled oscillator is connected with the input end of described frequency detection circuit; Described voltage-controlled oscillator is used to accept the described voltage signal that contains temperature information, and the frequency signal of exporting corresponding different temperatures is to a frequency detection circuit, whether described frequency detection circuit is higher than predetermined value according to detected temperature, send respective signal, described CPU sending controling instruction to a CPU.
The circuit of detection chip temperature in a kind of safety chip provided by the utility model; owing to adopted a hygrosensor circuit in chip circuit; under the situation that detects the temperature attack, can in time protect secure data, make temperature survey attack and can't realize at all.
Description of drawings
Fig. 1 is the synoptic diagram of circuit one preferred embodiment of detection chip temperature in the safety chip of the present utility model;
Fig. 2 is the synoptic diagram of another preferred embodiment of the circuit of detection chip temperature in the safety chip of the present utility model.
Embodiment
Below with reference to accompanying drawing, comparatively detailed explanation is carried out in each preferred embodiment of the present utility model.
The circuit of detection chip temperature in the safety chip of the present utility model, as shown in Figure 1, described hygrosensor provides the voltage of a benchmark at least, a signal that comprises temperature information is provided, and comparer, reference voltage that provides and the signal that comprises temperature information are connected two input ends of comparer, and the output terminal of comparer is connected to external circuit, and this output terminal can be set to a pin of described safety chip.
When temperature is lower than the temperature of setting, this signal that comprises temperature information changes with variation of temperature, but in the reference voltage that is provided, this moment, the level of described comparer output was a normal condition always, by the external circuit output high level of comparer control.When environment temperature when reaching the temperature value of setting, the signal that comprises temperature information moves closer in reference voltage.
When chip temperature surpassed the temperature value of setting, the signal that comprises temperature information surpassed reference voltage, and comparer output level upset this moment is by the external circuit output low level of comparer control.
The circuit of detection chip temperature in the safety chip described in the utility model, hygrosensor provides the voltage of a benchmark at least in another embodiment, a signal that comprises temperature information is provided, and comparer, reference voltage that provides and the signal that comprises temperature information are connected two input ends of comparer, and the output terminal of comparer is connected to the interruption of CPU.When temperature is lower than the temperature of setting, this signal that comprises temperature information changes with variation of temperature, but always in the reference voltage that is provided, this moment, the level of comparer output was a normal condition, look-at-me by comparer control does not enable, and CPU is in normal duty.When environment temperature when reaching the temperature value of setting, the signal that comprises temperature information moves closer in reference voltage.When environment temperature surpasses the temperature value of setting, the signal that comprises temperature information surpasses reference voltage, comparer output level upset this moment, enable the look-at-me of CPU, CPU is taken appropriate measures, the assailant as the recording module of initialization secure data, or deletes secure data fully, so that can't utilize temperature to attack the core secure data that reads in the chip.
Whether such scheme can the acquisition environment temperature reach predetermined chip temperature, can also carry out finer temperature on this basis and survey.For example can detect environment and be in not judge just under what temperature whether environment temperature surpasses setting value on earth.The utility model can provide a control signal that contains temperature information, a voltage-controlled oscillator, a frequency detection circuit, as shown in Figure 2, thereby utilization contains the frequency of the control signal of temperature information as the control voltage control generator of voltage-controlled oscillator, by the output frequency of frequency detection circuit detection oscillator, its result is sent into a CPU.When environment temperature one timing, the signal level that contains temperature information is determined, this moment this level control generator the output frequency correspondence certain temperature value, therefore temperature signal changes the concussion frequency signal into by these two modules, this concussion frequency is detected by frequency detector and the result is sent into CPU, thereby can obtain concrete environment temperature definitely.
In the embodiment circuit diagram of the present utility model as shown in Figure 1, foreign current is imported a current source, and this current source offers described triode one and determines constant electric current, the voltage V of this triode
BeRising with temperature reduces, so this voltage comprises the information of temperature.When the voltage of this triode is stablized constant reference voltage comparison with another one, will export a definite level.When environment temperature during less than the temperature value set, the signal level of described triode is greater than reference level, and described comparer is output as height.When environment temperature during greater than the temperature value set, the signal level of described triode is less than reference level, and described comparer is output as low, and this moment, external circuit took appropriate measures, with the safety of protection core data.
As shown in Figure 2, in the circuit of detection chip temperature, also be to provide described triode one to determine constant electric current, the voltage V of described triode in the utility model safety chip by current source
BeRising with temperature reduces, and this voltage includes the information of temperature.With the control signal of this signal as a voltage-controlled oscillator, when temperature rose, the control level of described voltage-controlled oscillator descended, the oscillation frequency of oscillator is descended, when temperature descended, the control voltage of voltage-controlled oscillator rose, and the frequency of oscillator is risen.After the processing of the output frequency of described voltage-controlled oscillator through a frequency detection circuit, obtain the discernible data about frequency of CPU, this CPU just can obtain the residing definite environment temperature of chip thus.When the environment temperature of finding chip is too high; for example can set a predetermined temperature value; surpassing this predetermined temperature value then is judged as and is subjected to temperature and attacks; send the instruction of safety precautions by described CPU; realization is to the removing or the initialization of core secure data, makes the external attack can't the detecting core secure data.
The utility model is at the temperature attack pattern, be provided with the said temperature detector circuit, and be that this hygrosensor circuit is arranged on safety chip inside, thereby can't be known that this chip is subjected to the hygrosensor circuit protection, prevented that the assailant from watching out for targetedly by the technician; And the output signal by hygrosensor is in time reset to core data, to realize effective protection to important core data, prevented mode that disabled user's serviceability temperature is attacked obtain extra visit by way of, thereby protected important secure data.
But should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to the utility model scope of patent protection, the utility model scope of patent protection should be as the criterion with claims.
Claims (3)
1, the circuit of detection chip temperature in a kind of safety chip is characterized in that, this circuit is arranged at a safety chip inside, comprises at least: a current source, a triode and a judgment processing circuit; Described current source output terminal is connected with base stage with the collector of described triode, and is connected to the input end of judgment processing circuit;
One current source is used for external external power source, and exports one and determine constant electric current;
One triode is used for sense ambient temperature and changes, and its base stage is connected the voltage signal that output contains temperature information with emitter;
One judgment processing circuit is used to experience this voltage signal that contains temperature information and to the external circuit sending controling instruction, after environment temperature surpasses predetermined value core data is taked safeguard measure.
2, circuit according to claim 1 is characterized in that, described judgment processing circuit also comprises a comparer; The collector of described current source output terminal and described triode and an input end that is connected to comparer after base stage is connected, an other end of comparer connects reference voltage simultaneously; Described comparer is used to receive a described voltage signal and a reference voltage that contains temperature information, whether is higher than described reference voltage according to described voltage signal, the output steering order.
3, circuit according to claim 1 is characterized in that, described judgment processing circuit also comprises a voltage-controlled oscillator and a frequency detection circuit; The collector of described current source output terminal and described triode and the input control end that is connected to described voltage-controlled oscillator after base stage is connected, the output terminal of described voltage-controlled oscillator is connected with the input end of described frequency detection circuit; Described voltage-controlled oscillator is used to accept the described voltage signal that contains temperature information, and the frequency signal of exporting corresponding different temperatures is to a frequency detection circuit, described frequency detection circuit is used for whether being higher than predetermined value according to detected temperature, send respective signal, described CPU sending controling instruction to a CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064658 CN2869815Y (en) | 2005-09-20 | 2005-09-20 | Circuit for detecting chip temperature in safety chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064658 CN2869815Y (en) | 2005-09-20 | 2005-09-20 | Circuit for detecting chip temperature in safety chip |
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| CN2869815Y true CN2869815Y (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520064658 Expired - Lifetime CN2869815Y (en) | 2005-09-20 | 2005-09-20 | Circuit for detecting chip temperature in safety chip |
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| CN (1) | CN2869815Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353467A (en) * | 2011-06-09 | 2012-02-15 | 迈普通信技术股份有限公司 | System and method for verifying detection accuracy of internal core temperature of chip |
| CN104104058A (en) * | 2014-07-22 | 2014-10-15 | Tcl通讯（宁波）有限公司 | Temperature protection device of power management chip and mobile terminal |
| CN103105242B (en) * | 2011-11-11 | 2017-05-17 | 拉碧斯半导体株式会社 | Temperature detection circuit and method of adjusting the same |
| CN107167265A (en) * | 2017-06-08 | 2017-09-15 | 浙江工业大学 | The temperature sensing circuit being easily integrated |
| WO2018010086A1 (en) * | 2016-07-12 | 2018-01-18 | 张升泽 | Electronic chip signal information sending method and system |
| CN108646252A (en) * | 2017-12-25 | 2018-10-12 | 深圳天眼激光科技有限公司 | A kind of pulse laser echo-signal modulate circuit and pulse type laser scanning system |
| CN109582552A (en) * | 2018-10-31 | 2019-04-05 | 山东超越数控电子股份有限公司 | A kind of simulating test device of CPU heat dissipation capacity |
| CN109638774A (en) * | 2018-12-24 | 2019-04-16 | 中国电子科技集团公司第五十八研究所 | A kind of thermal-shutdown circuit |
| CN109839218A (en) * | 2017-11-29 | 2019-06-04 | 北京兆易创新科技股份有限公司 | The test device of temperature sensor |
| CN109932630A (en) * | 2017-12-15 | 2019-06-25 | 朋程科技股份有限公司 | Excess temperature detection circuit and its test method |
| CN111307314A (en) * | 2020-05-12 | 2020-06-19 | 杭州优智联科技有限公司 | Circuit and method for detecting temperature of semiconductor chip |
-
2005
- 2005-09-20 CN CN 200520064658 patent/CN2869815Y/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353467A (en) * | 2011-06-09 | 2012-02-15 | 迈普通信技术股份有限公司 | System and method for verifying detection accuracy of internal core temperature of chip |
| CN103105242B (en) * | 2011-11-11 | 2017-05-17 | 拉碧斯半导体株式会社 | Temperature detection circuit and method of adjusting the same |
| CN104104058A (en) * | 2014-07-22 | 2014-10-15 | Tcl通讯（宁波）有限公司 | Temperature protection device of power management chip and mobile terminal |
| CN104104058B (en) * | 2014-07-22 | 2017-08-08 | Tcl通讯（宁波）有限公司 | The temperature protective device and mobile terminal of a kind of power management chip |
| WO2018010086A1 (en) * | 2016-07-12 | 2018-01-18 | 张升泽 | Electronic chip signal information sending method and system |
| CN107167265A (en) * | 2017-06-08 | 2017-09-15 | 浙江工业大学 | The temperature sensing circuit being easily integrated |
| CN109839218A (en) * | 2017-11-29 | 2019-06-04 | 北京兆易创新科技股份有限公司 | The test device of temperature sensor |
| CN109932630A (en) * | 2017-12-15 | 2019-06-25 | 朋程科技股份有限公司 | Excess temperature detection circuit and its test method |
| CN109932630B (en) * | 2017-12-15 | 2021-08-03 | 朋程科技股份有限公司 | Over-temperature detection circuit and testing method thereof |
| CN108646252A (en) * | 2017-12-25 | 2018-10-12 | 深圳天眼激光科技有限公司 | A kind of pulse laser echo-signal modulate circuit and pulse type laser scanning system |
| CN108646252B (en) * | 2017-12-25 | 2022-02-22 | 深圳天眼激光科技有限公司 | Pulse laser echo signal conditioning circuit and pulse type laser scanning system |
| CN109582552A (en) * | 2018-10-31 | 2019-04-05 | 山东超越数控电子股份有限公司 | A kind of simulating test device of CPU heat dissipation capacity |
| CN109638774A (en) * | 2018-12-24 | 2019-04-16 | 中国电子科技集团公司第五十八研究所 | A kind of thermal-shutdown circuit |
| CN111307314A (en) * | 2020-05-12 | 2020-06-19 | 杭州优智联科技有限公司 | Circuit and method for detecting temperature of semiconductor chip |
| CN111307314B (en) * | 2020-05-12 | 2020-07-31 | 杭州优智联科技有限公司 | Circuit and method for detecting temperature of semiconductor chip |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zhaori Science & Technology (Shenzhen) Co., Ltd. Assignor: Zhaori Tech Co., Ltd., Shenzhen Contract fulfillment period: 2009.2.28 to 2027.9.11 Contract record no.: 2009990000224 Denomination of utility model: Circuit for detecting chip temperature in safety chip Granted publication date: 20070214 License type: Exclusive license Record date: 20090326 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.2.28 TO 2027.9.11; CHANGE OF CONTRACT Name of requester: ZHAORI SCIENCE + TECHNOLOGY (SHENZHEN) CO., LTD. Effective date: 20090326 |
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| ASS | Succession or assignment of patent right |
Owner name: SINOSUN TECHNOLOGY (SHENZHEN) CO., LTD. Free format text: FORMER OWNER: SHENZHEN SINOSUN TECH CO., LTD. Effective date: 20100622 |
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Free format text: CORRECT: ADDRESS; FROM: 518040 BLOCK C-3, 6/F, BUILDING 213, TAIRAN 9TH ROAD, DISTRICT, SHENZHEN CITY, GUANGDONG PROVINCE TO: 518040 TOWER C, 6/F, BUILDING 213, TAIRAN INDUSTRY DISTRICT, CHEGONGMIAO, FUTIAN DISTRICT, SHENZHEN CITY |
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| TR01 | Transfer of patent right |
Effective date of registration: 20100622 Address after: 518040 Shenzhen city Futian District Che Kung Temple Tairan industrial district 213 building 6 floor C block Patentee after: Sinosun Technology (Shenzhen) Co., Ltd. Address before: Nine road 518040 Guangdong city of Shenzhen province Futian District Tairan 213 building 6 floor C-3 block Patentee before: Zhaori Tech Co., Ltd., Shenzhen |
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| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN ZHAORI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ZHAORI SCIENCE + TECHNOLOGY (SHENZHEN) CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 518040 Shenzhen city Futian District Che Kung Temple Tairan industrial district 213 building 6 floor C block Patentee after: Shenzhen Sinosun Technology Co., Ltd. Address before: 518040 Shenzhen city Futian District Che Kung Temple Tairan industrial district 213 building 6 floor C block Patentee before: Sinosun Technology (Shenzhen) Co., Ltd. |
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