CN109815078B - Operating system and control circuit thereof - Google Patents
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- CN109815078B CN109815078B CN201810875576.0A CN201810875576A CN109815078B CN 109815078 B CN109815078 B CN 109815078B CN 201810875576 A CN201810875576 A CN 201810875576A CN 109815078 B CN109815078 B CN 109815078B
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Abstract
An operating system includes a current generator, a sensing circuit, and a processing circuit. The current generator is used for providing a first current and a second current. The sensing circuit includes a first sensor. The first sensor has a first input end and a first output end. When the first input end receives the first current, the processing circuit detects a first voltage difference between the first input end and the first output end. When the first input end receives the second current, the processing circuit detects a second voltage difference between the first input end and the first output end. The processing circuit obtains the temperature around the first sensor according to the first and second pressure differences.
Description
Technical Field
The present invention relates to an operating system, and more particularly, to an operating system having a plurality of sensors.
Background
Generally, the temperature inside the host is an important factor in the stable operation of the host. If the heat extraction is abnormal due to too much dust in the casing, or the heat dissipation fan fails, the temperature in the casing is likely to rise, and the system is unstable or even crashed. To ensure proper operation of the host, it is necessary to monitor the temperature inside the host. In the conventional monitoring method, a plurality of temperature sensors are disposed inside a host, and a control Integrated Circuit (IC) receives the detection results of the temperature sensors. However, in order to couple multiple temperature sensors, many pins are additionally provided for the control IC. Thereby increasing the size of the control IC and increasing the component cost.
Disclosure of Invention
The invention provides an operating system, which comprises a current generator, a sensing circuit and a processing circuit. The current generator is used for providing a first current and a second current. The sensing circuit includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor has a first input end and a first output end. The first input end is used for receiving a first current or a second current. The second sensor has a second input end and a second output end. The second input terminal is coupled to the first input terminal. The third sensor has a third input end and a third output end. The third input terminal is used for receiving the first or the second current. The third output terminal is coupled to the first output terminal. The fourth sensor has a fourth input terminal and a fourth output terminal. The fourth input terminal is coupled to the third input terminal. The fourth output terminal is coupled to the second output terminal. The processing circuit is coupled to the sensing circuit. When the first input end receives the first current, the processing circuit detects a first voltage difference between the first input end and the first output end. When the first input end receives the second current, the processing circuit detects a second voltage difference between the first input end and the first output end. The processing circuit obtains the temperature around the first sensor according to the first and second pressure differences.
The present invention further provides a control circuit integrated in a chip, and the control circuit includes a current generator, a first pin, a second pin and a processing circuit. The current generator is used for providing a first current and a second current. The first pin is used for outputting a first or second current to a sensing circuit. The sensing circuit includes a first sensor, a second sensor, a third sensor and a fourth sensor. The first sensor has a first input end and a first output end. The first input terminal is used for receiving a first current or a second current. The second sensor has a second input end and a second output end. The second input terminal is coupled to the first input terminal. The third sensor has a third input end and a third output end. The third input terminal is used for receiving the first or the second current. The third output terminal is coupled to the first output terminal. The fourth sensor has a fourth input terminal and a fourth output terminal. The fourth input terminal is coupled to the third input terminal. The fourth output terminal is coupled to the second output terminal. The second pin is coupled to the first output terminal. The processing circuit is coupled to the first and second pins. When the first pin outputs the first current to the first input terminal, the processing circuit detects a first voltage difference between the first input terminal and the first output terminal through the first and second pins. When the first pin transmits the second current to the first input terminal, the processing circuit detects a second voltage difference between the first input terminal and the first output terminal through the first and second pins. The processing circuit obtains the temperature around the first sensor according to the first and second pressure differences.
Drawings
FIG. 1 is a schematic diagram of an operating system of the present invention.
FIG. 2 is another schematic diagram of an operating system of the present invention.
Reference numerals are as follows:
100: an operating system;
110. 210: a sensing circuit;
120. 220, and (2) a step of: a control circuit;
111-114, 211-219: a sensor;
IN 1-IN 4: an input end;
OT 1-OT 4: an output end;
Q1-Q4: a bipolar junction triode;
121. 221: a current generator;
122. 222: a processing circuit;
PN 1-PN 4: a pin;
123. 223: a switching circuit;
SW 1-SW 6: a switch;
OP1, OP 2: an operating voltage;
MT1, MT 2: a measuring end;
200: and (3) a chip.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. The present description provides different examples to illustrate the technical features of different embodiments of the present invention. The arrangement of the elements in the embodiments is for illustration and not for limiting the invention. In addition, the reference numerals in the embodiments are partially repeated to simplify the description, and do not indicate the relationship between the different embodiments.
FIG. 1 is a schematic diagram of an operating system of the present invention. As shown, the operating system 100 includes a sensing circuit 110 and a control circuit 120. In one embodiment, the control circuit 120 is integrated in a chip. In this embodiment, the sensing circuit 110 is disposed outside the chip, but not limited to the invention. In other embodiments, the control circuit 120 and the sensing circuit 110 are integrated in the same chip.
In the embodiment, the sensing circuit 110 includes sensors 111-114, but the invention is not limited thereto. The number of sensors is not limited in the present invention. In other embodiments, the sensing circuit 110 may have more or fewer sensors. The sensor 111 has an input IN1 and an output OT 1. In one embodiment, the sensor 111 is a Bipolar Junction Transistor (BJT) Q1. The collector and base of bipolar junction transistor Q1 are coupled together as input IN 1. The emitter of bipolar junction transistor Q1 is provided as output terminal OT 1. The present invention does not limit the type of the sensor 111. In another embodiment, the sensor 111 is a diode (not shown). IN this example, the anode of the diode serves as the input terminal IN1, and the cathode of the diode serves as the output terminal OT 1. In other embodiments, the sensor 111 has a PN junction and has a unidirectional conduction characteristic.
The sensor 112 has an input terminal IN2 and an output terminal OT 2. The input IN2 is coupled to the input IN 1. In one embodiment, the sensor 112 is a bipolar junction transistor Q2. The collector and base of bipolar junction transistor Q2 are coupled together as input IN 2. In this example, the emitter of bipolar junction transistor Q2 is used as output terminal OT 2. The present invention does not limit the type of the sensor 112. In some embodiments, the sensor 112 is a diode (not shown). IN this example, the anode of the diode serves as the input terminal IN2, and the cathode of the diode serves as the output terminal OT 2. In other embodiments, the sensor 112 has a PN junction and has a unidirectional conduction characteristic.
The sensor 113 has an input terminal IN3 and an output terminal OT 3. Output OT3 is coupled to output OT 1. In one possible embodiment, sensor 113 is a bipolar junction transistor Q3. The collector and base of bipolar junction transistor Q3 are coupled together as input IN 3. The emitter of bipolar junction transistor Q3 is provided as output terminal OT 3. The present invention does not limit the type of the sensor 113. In another embodiment, the sensor 113 is a diode (not shown). IN this example, the anode of the diode serves as the input terminal IN3, and the cathode of the diode serves as the output terminal OT 3. In other embodiments, the sensor 113 has a PN junction and has the characteristic of one-way conduction.
The sensor 114 has an input IN4 and an output OT 4. The input terminal IN4 is coupled to the input terminal IN 3. The output terminal OT4 is coupled to the output terminal OT 2. In one embodiment, the sensor 114 is a bipolar junction transistor Q4. The collector and base of bipolar junction transistor Q4 are coupled together as input IN 4. The emitter of bipolar junction transistor Q4 is provided as output terminal OT 4. The present invention does not limit the type of sensor 114. In other embodiments, the sensor 114 is a diode (not shown). IN this example, the anode of the diode serves as the input terminal IN4, and the cathode of the diode serves as the output terminal OT 4. In some embodiments, the sensor 114 has a PN junction and has a unidirectional conduction characteristic.
In the present embodiment, the control circuit 120 includes a current generator 121, a processing circuit 122, and pins PN 1-PN 4. The current generator 121 generates a first current or a second current according to the operating voltage OP 1. In one possible embodiment, the first current is different from the second current. In another possible embodiment, the current generator 121 further generates a third current. The third current is different from the first and second currents.
The pin PN1 is used for outputting the first or the second current to the input terminals IN1 and IN 2. The pin PN2 is used for outputting the first or the second current to the input terminals IN3 and IN 4. Pin PN3 is coupled to output terminals OT2 and OT 4. The pin PN4 is coupled to the output terminals OT1 and OT 3. The number of pins of the control circuit 120 is not limited in the present invention. In the present embodiment, the number of pins of the control circuit 120 is less than the number of sensors of the sensing circuit 110. Since the control circuit 120 can detect the sensing results of many sensors with only a small number of pins, the size and cost of the control circuit 120 can be reduced.
IN the present embodiment, when the pin PN1 outputs different currents to the input terminals IN1 and IN2, the processing circuit 122 knows the temperature around the sensor 111 according to the voltage across the sensor 111. For example, when the pin PN1 outputs the first current to the input IN1, the processing circuit 122 outputs the first current through the pinPN1 and PN4, sense a first voltage difference (e.g., V) between the input IN1 and the output OT1BE1). When the first pin PN1 transmits the second current to the input terminal IN1, the processing circuit 122 detects a second voltage difference (e.g., V) between the input terminal IN1 and the output terminal OT1 via the pins PN1 and PN4BE2). The processing circuit 122 knows the temperature around the sensor 111 according to the first and second pressure differences. In one possible embodiment, the processing circuit 122 is configured to generate the first voltage difference (e.g., V)BE1) With a second pressure difference (e.g. V)BE2) Difference between them (e.g. Δ V)BE) The temperature around the sensor 111 is calculated. IN another embodiment, when the pin PN1 outputs the third current to the input IN1, the processing circuit 122 detects a third voltage difference (e.g., V) between the input IN1 and the output OT1 via the pins PN1 and PN4BE3). In this example, the processing circuit 122 knows the temperature around the sensor 111 according to the first, second and third pressure differences.
Similarly, when the pin PN1 outputs the first current, the first current flows into the sensor 112 from the input terminal IN2 and flows out from the output terminal OT 2. The processing circuit 122 detects a fourth voltage difference between the input terminal IN2 and the output terminal OT2 through the pins PN1 and PN 3. When the input IN2 receives the second current, the processing circuit 122 detects a fifth voltage difference between the input IN2 and the output OT2 through the pins PN1 and PN 3. The processing circuit 122 knows the temperature around the sensor 112 according to the fourth and fifth pressure differences. IN another embodiment, when the pin PN1 outputs the third current, the processing circuit 122 detects a sixth voltage difference between the input terminal IN2 and the output terminal OT2 through the pins PN1 and PN 3. In this case, the processing circuit 122 knows the temperature around the sensor 112 according to the fourth, fifth and sixth pressure differences.
IN addition, when the pin PN2 outputs the first current to the input terminal IN3, the processing circuit 122 detects a seventh voltage difference between the input terminal IN3 and the output terminal OT3 through the pins PN2 and PN 4. When the pin PN2 transmits the second current to the input terminal IN3, the processing circuit 122 detects an eighth voltage difference between the input terminal IN3 and the output terminal OT3 via the pins PN2 and PN 4. The processing circuit 122 knows the temperature around the sensor 113 according to the seventh and eighth pressure differences. IN another embodiment, when the pin PN2 outputs the third current to the input terminal IN3, the processing circuit 122 detects a ninth voltage difference between the input terminal IN3 and the output terminal OT3 via the pins PN2 and PN 4. In this example, the processing circuit 122 knows the temperature around the sensor 113 according to the seventh, eighth and ninth pressure differences.
Similarly, when the pin PN2 outputs the first current, the first current flows into the sensor 114 from the input terminal IN4 and flows out from the output terminal OT 4. The processing circuit 122 detects a tenth voltage difference between the input terminal IN4 and the output terminal OT4 through the pins PN2 and PN 3. When the input IN2 receives the second current, the processing circuit 122 detects an eleventh voltage difference between the input IN4 and the output OT4 through the pins PN2 and PN 3. The processing circuit 122 knows the temperature around the sensor 114 according to the tenth and eleventh pressure differences. IN another embodiment, when the pin PN2 outputs the third current, the processing circuit 122 detects a twelfth voltage difference between the input terminal IN4 and the output terminal OT4 through the pins PN2 and PN 3. In this case, the processing circuit 122 knows the temperature around the sensor 114 according to the tenth, eleventh and twelfth pressure differences.
In other embodiments, the control circuit 120 further includes a switching circuit 123. The switching circuit 123 is coupled to the current generator 121, the pins PN 1-PN 4 and the processing circuit 122. In one embodiment, the switching circuit 123 has switches SW1 and SW 2. The switch SW1 is coupled between the current generator 121 and the pin PN1 for transmitting the first or the second current to the pin PN 1. The switch SW2 is coupled between the current generator 121 and the pin PN2 for transmitting the first or the second current to the pin PN 2.
In another embodiment, the switch circuit 123 further includes switches SW3 and SW 4. The switch SW3 is coupled between the pin PN1 and the measurement terminal MT1 of the processing circuit 122 for providing the voltage of the input terminal IN1 or IN2 to the processing circuit 122. The switch SW4 is coupled between the pin PN2 and the measurement terminal MT1 of the processing circuit 122 for providing the voltage at the input terminal IN3 or IN4 to the processing circuit 122.
In other embodiments, the switching circuit 123 further includes switches SW5 and SW 6. The switch SW5 is coupled between the pin PN3 and the operating voltage OP2 for providing the operating voltage OP2 to the output terminals OT2 and OT 4. The switch SW6 is coupled between the pin PN4 and the operating voltage OP2 for providing the operating voltage OP2 to the output terminals OT1 and OT 3. In the present embodiment, the measurement terminal MT2 of the processing circuit 122 receives the operating voltage OP 2. In some embodiments, the operating voltage OP2 is less than the operating voltage OP 1. In the present embodiment, the operating voltage OP2 is sufficient for the first or the second current generated by the current generator 121 to flow through the control circuit 110. In one embodiment, the operating voltage OP2 is a ground voltage.
In addition, the processing circuit 122 generates a plurality of control signals (not shown) for controlling the switches SW 1-SW 6. When the switch is turned on, the corresponding signal is transmitted to the corresponding device. For example, when the processing circuit 122 turns on the switch SW1, the switch SW1 provides the current (the first current or the second current) generated by the current generator 121 to the pin PN 1. In other embodiments, the current generator 121 is controlled by the processing circuit 122. In this example, the processing circuit 122 generates a trigger signal (not shown) to the current generator 121. The current generator 121 generates a corresponding current (first, second or third current) according to the trigger signal.
FIG. 2 is another schematic diagram of an operating system of the present invention. In the embodiment, the sensing circuit 210 and the control circuit 220 are integrated in the same chip 200, but the invention is not limited thereto. In other embodiments, the control circuit 220 is integrated into a chip, and the sensing circuit 210 is located outside the chip.
As shown, the sensing circuit 210 has sensors 211-219, but the invention is not limited thereto. In other embodiments, the sensing circuit 210 may have more sensors. Since the characteristics of the sensors 211-219 are similar to those of the sensors 111-114 of FIG. 1, the description thereof is omitted. In addition, in the present embodiment, the number of switches of the switching circuit 223 is related to the number of sensors. As the number of sensors increases, the number of switches of the switching circuit 223 increases. In one embodiment, when the current generator 221, the processing circuit 222 and the switching circuit 223 in the control circuit 220 are integrated in a chip, the chip can be coupled to nine external sensors by using only six pins. Since the characteristics of the current generator 221 and the processing circuit 222 are similar to those of the current generator 121 and the processing circuit 122 in fig. 1, the description thereof is omitted.
Unless otherwise defined, all terms (including technical and scientific terms) used herein are to be interpreted as commonly understood by one of ordinary skill in the art to which this invention belongs. Moreover, unless expressly stated otherwise, the definition of a term in a general dictionary shall be construed as being consistent with its meaning in the context of the relevant art and shall not be construed as an idealized or overly formal definition.
Although the invention has been described with reference to specific embodiments, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof. For example, a system, apparatus, or method according to an embodiment of the present invention may be implemented in hardware, software, or a combination of hardware and software. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (9)
1. An operating system, comprising:
a current generator for providing a first current and a second current;
a sensing circuit, comprising:
a first sensor having a first input end and a first output end, the first input end being used for receiving the first current or the second current;
a second sensor having a second input terminal coupled to the first input terminal and a second output terminal;
a third sensor having a third input end and a third output end, wherein the third input end is used for receiving the first current or the second current, and the third output end is coupled to the first output end; and
a fourth sensor having a fourth input terminal coupled to the third input terminal and a fourth output terminal coupled to the second output terminal; and
a processing circuit coupled to the sensing circuit, wherein when the first input terminal receives the first current, the processing circuit detects a first voltage difference between the first input terminal and the first output terminal, and when the first input terminal receives the second current, the processing circuit detects a second voltage difference between the first input terminal and the first output terminal, and the processing circuit obtains a temperature around the first sensor according to the first voltage difference and the second voltage difference;
when the third input end receives the first current, the processing circuit detects a third pressure difference between the third input end and the third output end, when the third input end receives the second current, the processing circuit detects a fourth pressure difference between the third input end and the third output end, and the processing circuit obtains the temperature around the third sensor according to the third pressure difference and the fourth pressure difference.
2. The operating system of claim 1, wherein the processing circuit has a first measurement terminal coupled to the first input terminal and the third input terminal and a second measurement terminal receiving an operating voltage.
3. The operating system of claim 2, further comprising:
and the switching circuit is coupled with the current generator and used for transmitting the first current or the second current to the first input end.
4. The operating system of claim 3, wherein the switching circuit comprises:
a first switch coupled between the current generator and the first input end; and
a second switch coupled between the current generator and the third input terminal.
5. The operating system of claim 1, wherein the current generator further generates a third current, the processing circuit detects a third voltage difference between the first input terminal and the first output terminal when the first input terminal receives the third current, and the processing circuit obtains the ambient temperature of the first sensor according to the first voltage difference, the second voltage difference, and the third voltage difference.
6. A control circuit integrated in a chip, comprising:
a current generator for providing a first current and a second current;
a first pin for outputting the first current or the second current to a sensing circuit, wherein the sensing circuit comprises:
a first sensor having a first input end and a first output end, the first input end being used for receiving the first current or the second current;
a second sensor having a second input terminal coupled to the first input terminal and a second output terminal;
a third sensor having a third input end and a third output end, wherein the third input end is used for receiving the first current or the second current, and the third output end is coupled to the first output end; and
a fourth sensor having a fourth input terminal coupled to the third input terminal and a fourth output terminal coupled to the second output terminal;
a second pin for coupling to the first output terminal; and
a processing circuit coupled to the first pin and the second pin, wherein when the first pin outputs the first current to the first input terminal, the processing circuit detects a first voltage difference between the first input terminal and the first output terminal through the first pin and the second pin, when the first pin transmits the second current to the first input terminal, the processing circuit detects a second voltage difference between the first input terminal and the first output terminal through the first pin and the second pin, and the processing circuit obtains a temperature around the first sensor according to the first voltage difference and the second voltage difference; when the third input end receives the first current, the processing circuit detects a third pressure difference between the third input end and the third output end, when the third input end receives the second current, the processing circuit detects a fourth pressure difference between the third input end and the third output end, and the processing circuit obtains the temperature around the third sensor according to the third pressure difference and the fourth pressure difference.
7. The control circuit of claim 6, wherein the processing circuit has a first measurement terminal coupled to the first pin and a second measurement terminal coupled to the second pin and receiving an operating voltage.
8. The control circuit of claim 7, further comprising:
and the switching circuit is coupled with the current generator and used for transmitting the first current or the second current to the first pin.
9. The control circuit of claim 8, wherein the switching circuit comprises:
a first switch coupled between the current generator and the first pin; and
the second switch is coupled between the current generator and a third pin, wherein the third pin is used for outputting the first current or the second current to the third input end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106140097A TWI627390B (en) | 2017-11-20 | 2017-11-20 | Operating system and control circuit thereof |
| TW106140097 | 2017-11-20 |
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| CN109815078A CN109815078A (en) | 2019-05-28 |
| CN109815078B true CN109815078B (en) | 2022-07-22 |
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| CN110174608A (en) * | 2019-05-08 | 2019-08-27 | 重庆全飞汽车零部件有限公司 | A kind of smart circuit detection device |
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| CN1773230A (en) * | 2004-11-12 | 2006-05-17 | 华邦电子股份有限公司 | Temperature detecting unit and system |
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| JP4535367B2 (en) * | 2004-05-24 | 2010-09-01 | ルネサスエレクトロニクス株式会社 | Integrated circuit device |
| US7429129B2 (en) * | 2005-02-28 | 2008-09-30 | Standard Microsystems Corporation | Proportional settling time adjustment for diode voltage and temperature measurements dependent on forced level current |
| TWI378226B (en) * | 2008-08-12 | 2012-12-01 | Hycon Technology Corp | Temperature measuring system and measuring method using the same |
| CN201589668U (en) * | 2009-11-24 | 2010-09-22 | 上海贝岭股份有限公司 | CMOS switch current temperature sensor circuit |
| TWI491858B (en) * | 2013-03-15 | 2015-07-11 | Richtek Technology Corp | Temperature determination circuit and method thereof |
| US9829387B2 (en) * | 2014-10-28 | 2017-11-28 | Infineon Technologies Austria Ag | System and method for temperature sensing |
| US10151644B2 (en) * | 2015-03-13 | 2018-12-11 | Taiwan Semiconductor Manufacturing Company Limited | Combination current generator configured to selectively generate one of a PTAT and a CTAT current |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1773230A (en) * | 2004-11-12 | 2006-05-17 | 华邦电子股份有限公司 | Temperature detecting unit and system |
| TW201323843A (en) * | 2011-12-05 | 2013-06-16 | Himax Imaging Ltd | Temperature sensing devices |
| CN103454006A (en) * | 2012-06-05 | 2013-12-18 | 北大方正集团有限公司 | Temperature monitoring circuit for light-emitting diode |
| CN104374484A (en) * | 2013-08-14 | 2015-02-25 | 南亚科技股份有限公司 | Temperature detecting apparatus, switch capacitor apparatus and voltage integrating circuit thereof |
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| CN109815078A (en) | 2019-05-28 |
| TW201923318A (en) | 2019-06-16 |
| TWI627390B (en) | 2018-06-21 |
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