CN113204278B - Server power consumption conversion system and server - Google Patents
Server power consumption conversion system and server Download PDFInfo
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- CN113204278B CN113204278B CN202110529052.8A CN202110529052A CN113204278B CN 113204278 B CN113204278 B CN 113204278B CN 202110529052 A CN202110529052 A CN 202110529052A CN 113204278 B CN113204278 B CN 113204278B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention provides a server power consumption conversion system and a server, wherein the system comprises: the power supply is connected to the server main board; the input end of the first transduction amplifier is connected to a preset pin of the power supply; the input end of the second transduction amplifier is connected to the output end of the power supply; the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU; a first resistor and a second resistor, the first resistor being connected between the first transconductance amplifier and the first input terminal of the voltage rectifier, the second resistor being connected to the second transconductance amplifier and the second input terminal of the voltage rectifier. By using the scheme of the invention, the reaction speed and the accuracy of signal transmission can be effectively improved, and the expensive logic circuit can be omitted to achieve the effect of power conversion.
Description
Technical Field
The present invention relates to the field of computers, and more particularly to a server power consumption conversion system and a server.
Background
Power consumption monitoring on high power servers is currently the most common way to protect PSUs (power supplies) from over-current over-temperature protection due to power consumption exceeding the load that PSUs can carry by other high power chips such as CPUs or GPUs, and to turn PSUs off. Closing of the PSU causes the server to stall, resulting in loss of users and businesses. Therefore, the system power consumption monitoring can accurately monitor power factors such as voltage and current, and the like, and the CPU can be informed of reducing the consumed power before overcurrent protection occurs in a digital signal mode so as to prevent the whole system from being closed.
Though the power consumption state of the system can be accurately obtained by means of the digital signal Pmbus (open standard power management protocol), the power consumption of the CPU system can be reported by Pmbus, but the processing reaction time is prolonged due to the polling chip, so that the time-consuming incompatibility of CPU and power consumption control is caused, and the efficiency and protection are greatly discounted.
Disclosure of Invention
Therefore, an objective of the embodiments of the present invention is to provide a power consumption conversion system of a server and a server, which can effectively improve the response speed and accuracy of signal transmission by using the technical scheme of the present invention, and can omit the use of expensive logic circuits to achieve the effect of power conversion.
Based on the above object, an aspect of an embodiment of the present invention provides a server power consumption conversion system including:
the power supply is connected to the server main board;
the input end of the first transduction amplifier is connected to a preset pin of the power supply;
the input end of the second transduction amplifier is connected to the output end of the power supply;
the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU;
a first resistor and a second resistor, the first resistor being connected between the first transconductance amplifier and the first input terminal of the voltage rectifier, the second resistor being connected between the second transconductance amplifier and the second input terminal of the voltage rectifier.
According to one embodiment of the present invention, the first and second transduction amplifiers respectively include:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
According to one embodiment of the invention, an active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
According to one embodiment of the present invention, the predetermined pin is I of the power supply share Pins.
According to one embodiment of the present invention, the system further comprises an over-current protection module, wherein the over-current protection module is arranged between the power supply and the server motherboard.
In another aspect of an embodiment of the present invention, there is also provided a transduction amplifier including:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
According to one embodiment of the invention, an active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
In another aspect of the embodiment of the present invention, there is also provided a server including a server power consumption conversion system including:
the power supply is connected to the server main board;
the input end of the first transduction amplifier is connected to a preset pin of the power supply;
the input end of the second transduction amplifier is connected to the output end of the power supply;
the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU;
a first resistor and a second resistor, the first resistor being connected between the first transconductance amplifier and the first input terminal of the voltage rectifier, the second resistor being connected between the second transconductance amplifier and the second input terminal of the voltage rectifier.
According to one embodiment of the present invention, the first and second transduction amplifiers respectively include:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
According to one embodiment of the invention, an active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
According to one embodiment of the present invention, the predetermined pin is I of the power supply share Pins.
According to one embodiment of the present invention, the server power consumption conversion system further includes an over-current protection module, and the over-current protection module is disposed between the power supply and the server motherboard.
The invention has the following beneficial technical effects: according to the server power consumption conversion system provided by the embodiment of the invention, the power supply is arranged and connected to the server main board;
the input end of the first transduction amplifier is connected to a preset pin of the power supply; the input end of the second transduction amplifier is connected to the output end of the power supply; the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU; the first resistor and the second resistor, the first resistor is connected to the first transduction amplifier and the first input end of the voltage rectifier, the second resistor is connected to the second transduction amplifier and the second input end of the voltage rectifier, the reaction speed and the accuracy of signal transmission can be effectively improved, the expensive logic circuit can be omitted, the effect of power conversion is achieved, and the product competitiveness is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other embodiments may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a server power consumption conversion system according to one embodiment of the invention;
FIG. 2 is a schematic diagram of a circuit of a sense amplifier according to one embodiment of the invention;
FIG. 3 is a schematic diagram of a server power consumption conversion system according to one embodiment of the invention;
fig. 4 is a schematic diagram of a server according to an embodiment of the invention.
Detailed Description
Embodiments of the present disclosure are described below. However, it is to be understood that the disclosed embodiments are merely examples and that other embodiments may take various alternative forms. The figures are not necessarily to scale; some functions may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. As will be appreciated by one of ordinary skill in the art, the various features illustrated and described with reference to any one of the figures may be combined with features illustrated in one or more other figures to produce embodiments that are not explicitly illustrated or described. The combination of features shown provides representative embodiments for typical applications. However, various combinations and modifications of the features consistent with the teachings of the present disclosure may be desired for certain specific applications or implementations.
Based on the above object, a first aspect of the embodiments of the present invention proposes an embodiment of a server power consumption conversion system. Fig. 1 shows a schematic diagram of the system.
As shown in fig. 1, the system may include:
and the power supply is connected to the server main board.
The power supply PSU supplies power to the system, and the PSU can be connected to the overcurrent protection module and then connected to the server main board.
The input end of the first transduction amplifier is connected to a preset pin of the power supply.
The preset pin is I set on PSU share The voltage output by the pin is converted according to the value of the current output by the PSU, and the proportional relationship is shown in the following table 1, for example, the maximum output current of the PSU is 100 amperes, the current output by the PSU is 50 amperes, the output percentage is 50%, and the voltage corresponding to 50% is 4 v as can be seen from the table. By the characteristic i=gm×v of the transduction amplifier, I can be determined share The voltage at the pin output is converted into a current signal on the order of microamps. The process time for this conversion is very short, typically 1us-10us.
TABLE 1 ratio of current to voltage
| Ratio of output current | Output voltage (V) | Voltage error |
| 40％ | 3.2000 | 5％ |
| 50％ | 4.0000 | 5％ |
| 60％ | 4.8000 | 5％ |
| 70％ | 5.6000 | 5％ |
And the input end of the second transduction amplifier is connected to the output end of the power supply.
The input voltage of the second transduction amplifier is directly obtained from the system voltage 12V, and the 12V voltage can be converted into a microampere-class current signal through the characteristic i=gm×v of the transduction amplifier. The process time for this conversion is very short, typically 1us-10us.
And the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU.
The voltage rectifier converts the input voltage into a digital signal and transmits the digital signal to the CPU through the Intel power management communication protocol, and the voltage value or the current value in the PSU can be obtained according to the requirement in the CPU, and the conversion and transmission process only needs 2us to 10us. The CPU may then calculate the output power consumption of the PSU from the obtained voltage and current values.
A first resistor and a second resistor, the first resistor being connected between the first transconductance amplifier and the first input terminal of the voltage rectifier, the second resistor being connected between the second transconductance amplifier and the second input terminal of the voltage rectifier. The two resistors are used for converting the current output by the transduction amplifier into voltage and then outputting the voltage to a voltage rectifier.
By adopting the technical scheme of the invention, the reaction speed and the accuracy of signal transmission can be effectively improved, and the expensive logic circuit can be omitted to achieve the effect of power conversion.
In a preferred embodiment of the present invention, as shown in fig. 2, the first and second transduction amplifiers have the same structure, including:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
In a preferred embodiment of the invention, the active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
According to the characteristics gm=i/V of the transduction amplifier, I is Iout and V is Input. Because the current mirror circuit Iout is equal to Vgm/Rgm, vgm is the Input signal and Rtopartial pressures of p and Rbot. The circuit consisting of OPA (operational amplifier) and C1, C3 and R generates a zero fz=1/(2pi R1C 1) and a pole fp= (c1+c3)/(2pi R1C 3), which can increase the stability and bandwidth of the output signal, the zero can increase the signal bandwidth, and the pole can reduce noise interference. For example, when the PSU output current is 100%, as shown in I in Table 1 share The voltage was 8V. Setting rtop=90kΩ, rbot=10kΩ, and rgm=1kΩ, the Input8V will be divided by Rtop/Rbot to obtain a voltage of 0.8V. Since the voltage at the non-inverting Input terminal of the operational amplifier is directly fed back to the Input terminal through the output voltage of the voltage follower, vgm=0.8v and iout=vgm/Rgm, when the PSU output current is 100%, iout=0.8v/1kΩ=800 uA can be obtained, and the gain gm=iout/input=800 uA/8v=100 uA/V of the transduction amplifier can be obtained. If the first resistance is 1kΩ, isys= (Input gm 1kΩ) v=0.8v, so if I share The voltage is 8V, then 0.8V is input to the voltage rectifier, the voltage rectifier can restore the actual current value through the conversion of an internal ADC (analog-digital converter) and a formula, and then the actual current value is quickly returned to the CPU through SVID (Intel power management communication protocol), so that the CPU can achieve quick adjustment efficiency.
In a preferred embodiment of the present invention, the predetermined pin is I of the power supply share Pins.
In a preferred embodiment of the present invention, the system further comprises an over-current protection module, wherein the over-current protection module is disposed between the power supply and the server motherboard.
By adopting the technical scheme of the invention, the reaction speed and the accuracy of signal transmission can be effectively improved, and the expensive logic circuit can be omitted to achieve the effect of power conversion.
In view of the above object, a second aspect of the embodiments of the present invention proposes a transduction amplifier, as shown in fig. 2, including:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
In a preferred embodiment of the invention, the active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
FIG. 3 is an embodiment of a transduction amplifier of the present invention applied to a server power conversion system, as shown in FIG. 3, comprising:
a power supply;
a transduction amplifier, the input end of which is connected to the output end of the power supply;
the input end of the hot plug circuit is connected to the output end of the power supply, and the output end is connected to the server main board;
the first input end of the voltage rectifier is connected to the output end of the transduction amplifier, the second input end of the voltage rectifier is connected to a preset pin of the hot plug circuit, and the output end of the voltage rectifier is connected to the server CPU;
a first resistor connected between the sense amplifier and the first input of the voltage rectifier.
The current input by the second input end of the voltage rectifier is a signal amplified by a certain multiplying power by detecting the voltage across the two ends of the power precision resistor through the hot plug circuit. The voltage input by the first input end is directly obtained from 12V output by the power supply, and the 12V voltage is converted into a microampere-class current signal through the characteristic I=gm×V of the transduction amplifier. The voltage rectifier converts the input voltage into a digital signal and transmits the digital signal to the CPU through the Intel power management communication protocol, and the voltage value or the current value in the PSU can be obtained according to the requirement in the CPU, and the conversion and transmission process only needs 2us to 10us. The CPU may then calculate the output power consumption of the PSU from the obtained voltage and current values.
In view of the above object, a third aspect of the embodiments of the present invention proposes a server, as shown in fig. 4, the server including a server power consumption conversion system including:
the power supply is connected to the server main board;
the input end of the first transduction amplifier is connected to a preset pin of the power supply;
the input end of the second transduction amplifier is connected to the output end of the power supply;
the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, and the output end of the voltage rectifier is connected to the server CPU;
a first resistor and a second resistor, the first resistor being connected between the first transconductance amplifier and the first input terminal of the voltage rectifier, the second resistor being connected between the second transconductance amplifier and the second input terminal of the voltage rectifier.
In a preferred embodiment of the present invention, the first and second transduction amplifiers have the same structure, including:
an active current mirror;
the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of a mos tube where the input end of the active current mirror is located, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
In a preferred embodiment of the invention, the active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The embodiments described above, and in particular any "preferred" embodiments, are possible examples of implementations and are presented only for clarity of understanding of the principles of the invention. Many variations and modifications may be made to the above-described embodiments without departing substantially from the spirit and principles of the technology described herein. All modifications are intended to be included within the scope of this disclosure and protected by the following claims.
Claims (8)
1. A server power consumption conversion system, comprising:
a power supply connected to the server motherboard;
a first transconductance amplifier, an input end of which is connected to a preset pin of the power supply, wherein the preset pin is I of the power supply share Pins, I share The voltage output by the pin is converted according to the value of the current output by the power supply;
a second transconductance amplifier, an input of which is connected to an output of the power supply;
the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, the output end of the voltage rectifier is connected to a server CPU, a voltage value or a current value in the power supply is obtained according to requirements in the CPU, and the CPU calculates to obtain the output power consumption of the power supply according to the obtained voltage value or current value;
a first resistor connected between the first transconductance amplifier and the first input of the voltage rectifier, and a second resistor connected between the second transconductance amplifier and the second input of the voltage rectifier.
2. The system of claim 1, wherein the first and second transduction amplifiers each comprise:
an active current mirror;
and the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of the mos tube where the input end of the active current mirror is positioned, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
3. The system of claim 2, wherein the active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
4. The system of claim 1, further comprising an over-current protection module disposed between the power supply and the server motherboard.
5. A server, the server comprising a server power consumption conversion system, the server power consumption conversion system comprising:
a power supply connected to the server motherboard;
a first transconductance amplifier, an input end of which is connected to a preset pin of the power supply, wherein the preset pin is I of the power supply share Pins, I share The voltage output by the pin is converted according to the value of the current output by the power supply;
a second transconductance amplifier, an input of which is connected to an output of the power supply;
the first input end of the voltage rectifier is connected to the output end of the first transduction amplifier, the second input end of the voltage rectifier is connected to the output end of the second transduction amplifier, the output end of the voltage rectifier is connected to a server CPU, a voltage value or a current value in the power supply is obtained according to requirements in the CPU, and the CPU calculates to obtain the output power consumption of the power supply according to the obtained voltage value or current value;
a first resistor connected between the first transconductance amplifier and the first input of the voltage rectifier, and a second resistor connected between the second transconductance amplifier and the second input of the voltage rectifier.
6. The server of claim 5, wherein the first and second transduction amplifiers each comprise:
an active current mirror;
and the non-inverting input end of the operational amplifier is connected to the input end of the transduction amplifier through a third resistor and grounded through a fourth resistor, the inverting input end of the operational amplifier is connected to the drain electrode of the mos tube where the input end of the active current mirror is positioned, and the output end of the operational amplifier is connected to the input end of the active current mirror and grounded through a first capacitor and grounded through a second capacitor and a fifth resistor.
7. The server of claim 6, wherein the active current mirror comprises:
the source electrode of the first mos tube is connected to the source electrode of the second mos tube, the grid electrode is connected to the grid electrode of the second mos tube, the drain electrode is connected to the grid electrode of the second mos tube, the source electrode of the third mos tube is connected to the drain electrode of the first mos tube, the drain electrode is grounded through a sixth resistor, the grid electrode is connected to the input end of the active current mirror, and the drain electrode of the second mos tube is connected to the output end of the active current mirror.
8. The server of claim 5, wherein the server power consumption conversion system further comprises an over-current protection module disposed between the power supply and the server motherboard.
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| CN110783910A (en) * | 2018-07-26 | 2020-02-11 | 万国半导体(开曼)股份有限公司 | System power monitoring |
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| US7622830B2 (en) * | 2001-08-01 | 2009-11-24 | O2Micro International Limited | Supply topology with power limiting feedback loop |
| CN201233548Y (en) * | 2008-07-25 | 2009-05-06 | 深圳市远望谷信息技术股份有限公司 | Voltage-current conversion circuit |
| JP6214924B2 (en) * | 2012-09-14 | 2017-10-18 | ルネサスエレクトロニクス株式会社 | Controller and system having controller |
| US9122472B2 (en) * | 2013-03-06 | 2015-09-01 | Dell Products L.P. | System and method of measuring real-time current |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6304108B1 (en) * | 2000-07-14 | 2001-10-16 | Micrel, Incorporated | Reference-corrected ratiometric MOS current sensing circuit |
| CN110783910A (en) * | 2018-07-26 | 2020-02-11 | 万国半导体(开曼)股份有限公司 | System power monitoring |
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