TWI392990B - Voltage regulating circuit, voltage regulating method, and computer system having the same - Google Patents
Voltage regulating circuit, voltage regulating method, and computer system having the same Download PDFInfo
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本發明係關於一種電壓調整電路及其電腦系統，特別是一種利用偵測負載電流總量以進行調整USB連接埠之輸出電壓之電壓調整電路及其電腦系統。The invention relates to a voltage adjusting circuit and a computer system thereof, in particular to a voltage adjusting circuit and a computer system thereof for detecting an output voltage of a USB port by detecting a total amount of load current.
在現今的電子產品的應用上，許多裝置，例如手機、相機或是其他的手持式電子裝置，都可使用USB傳輸埠當作充電的介面。同時目前筆記型電腦或是桌上型電腦都已經具備USB傳輸埠，而提供給USB傳輸埠的電壓皆為固定的。例如在筆記型電腦中是由電源供應模組提供5V或3.3V之固定電壓給USB傳輸埠，以當作手持式電子裝置電源訊號。但電源供應模組所提供之5V或3.3V之固定電壓還必須同時需要提供其他的裝置使用，例如光碟機、硬碟等等。並且USB傳輸埠通常是電流傳輸的最末端，當USB傳輸埠連接外接式之光碟機或硬碟時，就會需要較大電流之電源訊號，以符合外接式之光碟機或硬碟所需之壓降。In today's electronic applications, many devices, such as cell phones, cameras, or other handheld electronic devices, can use the USB port as a charging interface. At the same time, both the notebook computer and the desktop computer already have a USB port, and the voltage supplied to the USB port is fixed. For example, in a notebook computer, a power supply module provides a fixed voltage of 5V or 3.3V to the USB transmission port to serve as a power signal for the handheld electronic device. However, the fixed voltage of 5V or 3.3V provided by the power supply module must also be used for other devices, such as CD players, hard disks, and so on. And the USB transmission port is usually the end of the current transmission. When the USB transmission port is connected to an external CD player or hard disk, a large current power signal is required to meet the requirements of the external optical disk drive or hard disk. Pressure drop.
由於先前技術之電源供應模組所提供電壓皆為5V或3.3V之固定電壓，並未考慮後端電流負載之大小。當壓降過低可能造成資料傳輸品質不良，導致傳輸速度變慢，甚至會因為電壓過低使得USB傳輸埠之訊號完全無法傳送，使作業系統無法辨認此電子裝置。Since the voltage supplied by the power supply module of the prior art is a fixed voltage of 5V or 3.3V, the magnitude of the back-end current load is not considered. When the voltage drop is too low, the data transmission quality may be poor, resulting in a slow transmission speed. Even if the voltage is too low, the signal transmitted by the USB signal cannot be transmitted at all, and the operating system cannot recognize the electronic device.
為解決上述的缺失，在先前技術中，台灣發明公告I278737已經接露一種用於USB連接埠之限流電路。請參考圖1係先前技術之限流電路之硬體架構示意圖。In order to solve the above-mentioned shortcomings, in the prior art, Taiwan Invention Announcement I278737 has disclosed a current limiting circuit for a USB port. Please refer to FIG. 1 , which is a schematic diagram of a hardware architecture of a prior art current limiting circuit.
先前技術之筆記型電腦90具有電源轉換電路92、限流電路93及USB設備94。筆記型電腦90藉由電壓源91以輸入電源訊號，並經由USB設備94與USB電子裝置95電性連接。限流電路93內部具有儲能元件931，例如電容，用以提供另一電源訊號之來源。當對USB電子裝置95進行充電時，限流電路93係進行判斷。當USB電子裝置95所需之電壓大於參考值時，電源轉換電路92係控制由儲能元件931以提供USB電子裝置95所需之電壓。The prior art notebook computer 90 has a power conversion circuit 92, a current limiting circuit 93, and a USB device 94. The notebook computer 90 is electrically connected to the USB electronic device 95 via the USB device 94 by inputting a power signal from the voltage source 91. The current limiting circuit 93 internally has an energy storage element 931, such as a capacitor, for providing a source of another power signal. When the USB electronic device 95 is charged, the current limiting circuit 93 makes a determination. When the voltage required by the USB electronic device 95 is greater than the reference value, the power conversion circuit 92 controls the voltage required by the energy storage element 931 to provide the USB electronic device 95.
利用上述的方式，雖然可以解決供應至USB電子裝置95之電壓不足的問題，但先前技術之限流電路93會具有較複雜的電路架構，且必須要增加儲能元件931。如此一來，會增加許多製造成本。In the above manner, although the problem of insufficient voltage supplied to the USB electronic device 95 can be solved, the prior art current limiting circuit 93 has a complicated circuit structure, and the energy storage element 931 must be added. As a result, many manufacturing costs are added.
有鑑於此，因此有必要發明一種電壓調整電路及其電腦系統，以解決先前技術的缺失。In view of this, it is therefore necessary to invent a voltage adjustment circuit and its computer system to solve the lack of prior art.
本發明之主要目的係在提供一種電壓調整電路及電腦系統，具有利用偵測負載電流總量以進行調整USB連接埠之輸出電壓之功能。The main object of the present invention is to provide a voltage adjustment circuit and a computer system having the function of detecting the output voltage of the USB port by detecting the total amount of load current.
本發明之另一主要目的係在提供一種電壓調整之方法。Another primary object of the present invention is to provide a method of voltage regulation.
為達成上述之目的，本發明之電壓調整電路，係用於調整USB連接埠之輸出電壓。電壓調整電路包括電源供應模組、電流限制模組、電流偵測模組及電流訊號處理模組。電源供應模組具有電壓調整功能，用以供應電源訊號。電流限制模組係與電源供應模組電性連接，用以傳輸電源訊號至USB連接埠，並限制USB連接埠之負載電流總量不超出設定值。電流偵測模組係與電流限制模組電性連接，用以偵測USB連接埠之負載電流總量。電流訊號處理模組係與電流偵測模組電性連接，用以根據負載電流總量調整電源供應模組之電源訊號。其中若負載電流總量接近設定值，則電流訊號處理模組控制電源供應模組以增加電源訊號之電壓值。To achieve the above object, the voltage adjustment circuit of the present invention is for adjusting the output voltage of the USB port. The voltage adjustment circuit includes a power supply module, a current limiting module, a current detecting module, and a current signal processing module. The power supply module has a voltage adjustment function for supplying power signals. The current limiting module is electrically connected to the power supply module for transmitting the power signal to the USB port and limiting the total load current of the USB port not exceeding the set value. The current detecting module is electrically connected to the current limiting module to detect the total load current of the USB port. The current signal processing module is electrically connected to the current detecting module for adjusting the power signal of the power supply module according to the total load current. If the total load current is close to the set value, the current signal processing module controls the power supply module to increase the voltage value of the power signal.
本發明之電腦系統包括USB連接埠及電壓調整電路。電壓調整電路係與USB連接埠電性連接，用以調整USB連接埠之輸出電壓。電壓調整電路包括電源供應模組、電流限制模組、電流偵測模組及電流訊號處理模組。電源供應模組具有電壓調整功能，用以供應電源訊號。電流限制模組係與電源供應模組電性連接，用以分別傳輸電源訊號至複數之USB連接埠，並限制複數之USB連接埠之負載電流總量不超出設定值。電流偵測模組係與電流限制模組電性連接，用以偵測複數之USB連接埠之負載電流總量。電流訊號處理模組係與電流偵測模組電性連接，用以根據負載電流總量調整電源供應模組之電源訊號。其中若負載電流總量接近設定值，則電流訊號處理模組控制電源供應模組以增加電源訊號之電壓值。The computer system of the present invention includes a USB port and a voltage adjustment circuit. The voltage adjustment circuit is electrically connected to the USB connection to adjust the output voltage of the USB port. The voltage adjustment circuit includes a power supply module, a current limiting module, a current detecting module, and a current signal processing module. The power supply module has a voltage adjustment function for supplying power signals. The current limiting module is electrically connected to the power supply module for respectively transmitting the power signal to the plurality of USB ports, and limiting the total load current of the plurality of USB ports not exceeding the set value. The current detecting module is electrically connected to the current limiting module for detecting the total load current of the plurality of USB ports. The current signal processing module is electrically connected to the current detecting module for adjusting the power signal of the power supply module according to the total load current. If the total load current is close to the set value, the current signal processing module controls the power supply module to increase the voltage value of the power signal.
本發明之電壓調整之方法包括以下步驟：供應電源訊號至USB連接埠；偵測USB連接埠之負載電流總量；判斷負載電流總量是否接近設定值；以及若是，則提高電源訊號之電壓值。The voltage adjustment method of the present invention comprises the steps of: supplying a power signal to a USB port; detecting a total amount of load current of the USB port; determining whether the total load current is close to a set value; and if so, increasing a voltage value of the power signal .
為讓本發明之上述和其他目的、特徵和優點能更明顯易懂，下文特舉出本發明之具體實施例，並配合所附圖式，作詳細說明如下。The above and other objects, features and advantages of the present invention will become more <
請先參考圖2係本發明電腦系統之示意圖。Please refer to FIG. 2 for a schematic diagram of the computer system of the present invention.
本發明之電腦系統1係為筆記型電腦或是桌上型電腦主機，但本發明並不以此為限。電腦系統1內部包括電壓調整電路10，USB連接埠20及內部電子裝置70。電腦系統1可具有單一或是複數之USB連接埠20，使得電腦系統1可藉由USB連接埠20連接USB電子裝置21。USB電子裝置21可為隨身碟、相機或滑鼠等任何可藉由USB傳輸協定以傳輸訊號或充電之手持式裝置，但本發明並不以上述所列舉的裝置為限。電腦系統1還包括了內部電子裝置70，可為硬碟機或光碟機等裝置，但本發明並不以此為限。The computer system 1 of the present invention is a notebook computer or a desktop computer host, but the invention is not limited thereto. The computer system 1 includes a voltage adjustment circuit 10, a USB port 20 and an internal electronic device 70. The computer system 1 can have a single or multiple USB ports 20 so that the computer system 1 can be connected to the USB electronic device 21 via the USB port 20. The USB electronic device 21 can be any portable device such as a flash drive, a camera or a mouse that can transmit signals or charge by USB transmission protocol, but the present invention is not limited to the devices listed above. The computer system 1 further includes an internal electronic device 70, which may be a device such as a hard disk drive or a CD player, but the invention is not limited thereto.
電壓調整電路10用以調整供應至USB連接埠20所需之輸出電壓。電壓調整電路10包括電源供應模組30、電流限制模組40、電流偵測模組50及電流訊號處理模組60，上述模組之間係彼此電性連接。電源供應模組30具有電壓調整之功能，能接收市電電源或是電池模組之電源，以調整為得以供應電腦系統1之所需之電源訊號，例如5伏特或3.3伏特之電壓訊號。如此一來，連接USB連接埠20之USB電子裝置21與內部電子裝置70即可接收電源供應模組30輸出電源訊號。The voltage adjustment circuit 10 is used to adjust the output voltage required to be supplied to the USB port 20. The voltage adjustment circuit 10 includes a power supply module 30, a current limiting module 40, a current detecting module 50, and a current signal processing module 60. The modules are electrically connected to each other. The power supply module 30 has a voltage adjustment function, and can receive power from the mains power supply or the battery module to adjust the power signal required for the computer system 1, such as a voltage signal of 5 volts or 3.3 volts. In this way, the USB electronic device 21 and the internal electronic device 70 connected to the USB port 20 can receive the power supply module 30 to output a power signal.
電流限制模組40係與USB連接埠20電性連接，用以限制USB連接埠20之負載電流總量。其中電流限制模組40可利用一金氧半電晶體所架構而成，但本發明並不以此為限。由於USB連接埠20可能連接需要大電流負載之USB電子裝置21，若沒有限制USB連接埠20之負載電流總量，則可能因為要增加傳輸至USB電子裝置21之電流，導致電腦系統1之其餘電子元件電流量不足而無法作用。因此必須要利用電流限制模組40限制USB連接埠20之負載電流總量，使其不超出一設定值，例如不超出1.5安培，但本發明並不以此為限。需注意的是，每個USB連接埠20可以利用一個電流限制模組40以限制負載電流總量，或是複數之USB連接埠20同時藉由一個電流限制模組40限制其負載電流總量，但本發明並不以此為限。The current limiting module 40 is electrically connected to the USB port 20 for limiting the total load current of the USB port 20 . The current limiting module 40 can be constructed by using a MOS transistor, but the invention is not limited thereto. Since the USB port 20 may be connected to the USB electronic device 21 that requires a large current load, if the total amount of load current of the USB port 20 is not limited, the remaining amount of the computer system 1 may be caused by increasing the current transmitted to the USB device 21. The amount of current in the electronic components is insufficient to function. Therefore, the current limiting module 40 must be used to limit the total load current of the USB port 20 so as not to exceed a set value, for example, not exceeding 1.5 amps, but the invention is not limited thereto. It should be noted that each USB port 20 can utilize a current limiting module 40 to limit the total load current, or a plurality of USB ports 20 to limit the total load current by a current limiting module 40. However, the invention is not limited thereto.
電流偵測模組50係與電流限制模組40電性連接，用以偵測負載電流總量。由於在現有技術中已經揭露許多電流偵測之方法，並且已經被熟悉此技術之人員所廣泛應用，故在此不再贅述其方法。The current detecting module 50 is electrically connected to the current limiting module 40 for detecting the total load current. Since many methods of current detection have been disclosed in the prior art and have been widely used by those skilled in the art, the method will not be described herein.
電流訊號處理模組60係同時與電流偵測模組50及電源供應模組30電性連接以形成一迴路。電流偵測模組50偵測出負載電流總量之電流值時，電流訊號處理模組60係根據負載電流總量之電流值調整電源供應模組30之電源訊號之電壓值。舉例而言，若當負載電流總量接近設定值時，即代表USB電子裝置21需要較大的負載電流，因此電流訊號處理模組60可控制電源供應模組30增加電源訊號之電壓值。The current signal processing module 60 is electrically connected to the current detecting module 50 and the power supply module 30 to form a loop. When the current detecting module 50 detects the current value of the total load current, the current signal processing module 60 adjusts the voltage value of the power signal of the power supply module 30 according to the current value of the total load current. For example, if the total load current is close to the set value, that is, the USB electronic device 21 requires a large load current, the current signal processing module 60 can control the power supply module 30 to increase the voltage value of the power signal.
另一方面，電流訊號處理模組60亦可直接設置於電源供應模組30內，使得電源供應模組30可藉由一迴路直接判斷負載電流總量之電流值。On the other hand, the current signal processing module 60 can also be directly disposed in the power supply module 30, so that the power supply module 30 can directly determine the current value of the total load current through a loop.
需注意的是，電流限制模組40還可與寄生電阻41電性連接，電流偵測模組50係偵測寄生電阻41之電流以決定電源訊號之電壓值之所需調整值。舉例而言，本發明可以設定當寄生電阻41之電流增加1安培，則電流訊號處理模組60控制電源供應模組30提高電源訊號之電壓值0.1伏特；當寄生電阻41之電流增加2安培，電流訊號處理模組60控制電源供應模組30提高電源訊號之電壓值0.2伏特。上述之列舉之調整值僅為示意，可依照需求或是寄生電阻41之阻值來做設定，本發明並不以此為限。It should be noted that the current limiting module 40 can also be electrically connected to the parasitic resistance 41. The current detecting module 50 detects the current of the parasitic resistance 41 to determine the required adjustment value of the voltage value of the power signal. For example, the present invention can be configured to increase the current of the parasitic resistance 41 by 1 amp, and the current signal processing module 60 controls the power supply module 30 to increase the voltage value of the power signal by 0.1 volt; when the current of the parasitic resistance 41 increases by 2 amps, The current signal processing module 60 controls the power supply module 30 to increase the voltage value of the power signal by 0.2 volts. The above-mentioned adjustment values are merely illustrative, and may be set according to requirements or the resistance value of the parasitic resistance 41, and the present invention is not limited thereto.
由上述的描述可知，藉由偵測寄生電阻41之電流進行調整之方法，不會使得電源供應模組30一次提昇太多的電壓值而導致輸出功率的浪費與成本的增加。As can be seen from the above description, the method of detecting the current of the parasitic resistance 41 does not cause the power supply module 30 to increase too much voltage value at a time, resulting in waste of output power and cost.
接著請參考圖3及圖4關於本發明之電壓調整之方法之相關示意圖。其中圖3係本發明之電壓調整之方法之步驟流程圖，圖4係本發明之電壓調整電路之示意圖。Next, please refer to FIG. 3 and FIG. 4 for related diagrams of the voltage adjustment method of the present invention. 3 is a flow chart of the steps of the voltage adjustment method of the present invention, and FIG. 4 is a schematic diagram of the voltage adjustment circuit of the present invention.
此處需注意的是，以下雖以具有電壓調整電路10為例說明本發明之電壓調整之方法，但本發明之電壓調整之方法並不以使用在電壓調整電路10為限。It should be noted that the voltage adjustment method of the present invention will be described below by taking the voltage adjustment circuit 10 as an example. However, the voltage adjustment method of the present invention is not limited to the voltage adjustment circuit 10.
在圖4中係具有第一USB連接埠20a、第二USB連接埠20b及第三USB連接埠20c，且分別連接第一電流限制模組40a、第二電流限制模組40b及第三電流限制模組40c。在此實施例中，係以USB電子裝置21與第一USB連接埠20a連接為例進行說明，但本發明並不以此為限。In FIG. 4, a first USB port 20a, a second USB port 20b, and a third USB port 20c are connected, and the first current limiting module 40a, the second current limiting module 40b, and the third current limit are respectively connected. Module 40c. In this embodiment, the USB electronic device 21 is connected to the first USB port 20a as an example, but the invention is not limited thereto.
首先進行步驟301：供應一電源訊號至USB連接埠。First, proceed to step 301: supply a power signal to the USB port.
當USB電子裝置21與第一USB連接埠20a連接時，首先電源供應模組30係供應電源訊號至第一USB連接埠20a。When the USB electronic device 21 is connected to the first USB port 20a, the power supply module 30 first supplies a power signal to the first USB port 20a.
其次進行步驟302：偵測USB連接埠之一負載電流總量。Next, proceed to step 302: detecting a total amount of load current of the USB port.
由於第一USB連接埠20a與USB電子裝置21進行連結，並且藉由接收到電源訊號而具有電流傳輸。因此第一電流偵測模組50a係偵測流經第一USB連接埠20a之負載電流。由於在本實施例中只有第一USB連接埠20a連接USB電子裝置21，因此流經第一USB連接埠20a之負載電流即視為負載電流總量。Since the first USB port 20a is connected to the USB electronic device 21, and has a current transmission by receiving a power signal. Therefore, the first current detecting module 50a detects the load current flowing through the first USB port 20a. Since only the first USB port 20a is connected to the USB electronic device 21 in this embodiment, the load current flowing through the first USB port 20a is regarded as the total amount of load current.
接著進行步驟303：判斷負載電流總量是否接近一設定值。Then, proceed to step 303: determine whether the total load current is close to a set value.
在步驟302中得到負載電流總量後，電流訊號處理模組60係判斷此負載電流總量是否接近設定值，例如1.5安培，但本發明並不以此為限。After the total amount of load current is obtained in step 302, the current signal processing module 60 determines whether the total amount of the load current is close to a set value, for example, 1.5 amps, but the invention is not limited thereto.
若第一USB連接埠20a所流經之電流遠小於1.5安培，則代表USB電子裝置21所造成的電壓降不會對整體電腦系統1之作用造成影響，因此電流訊號處理模組60即不動作。If the current flowing through the first USB port 20a is much less than 1.5 amps, the voltage drop caused by the USB electronic device 21 does not affect the function of the overall computer system 1, so the current signal processing module 60 does not operate. .
若第一USB連接埠20a所流經之電流接近或已經為1.5安培，則代表USB電子裝置21所造成的電壓降可能會對整體電腦系統1之作用造成影響。If the current flowing through the first USB port 20a is close to or has been 1.5 amps, the voltage drop caused by the USB electronic device 21 may affect the overall computer system 1.
如此一來即進行步驟304：偵測一寄生電阻之電流值。In this way, step 304 is performed to detect the current value of a parasitic resistance.
由於USB電子裝置21之電壓降會對整體電腦系統1造成影響，因此電流訊號處理模組60必需要控制電源供應模組30以提昇電源訊號之電壓值。同時第一電流偵測模組50a要先偵測第一寄生電阻41a之電流值，才能得知電源訊號所需要的調整值。Since the voltage drop of the USB electronic device 21 affects the overall computer system 1, the current signal processing module 60 must control the power supply module 30 to increase the voltage value of the power signal. At the same time, the first current detecting module 50a first detects the current value of the first parasitic resistance 41a to know the adjustment value required by the power signal.
最後進行步驟305：提高電源訊號之電壓值。Finally, step 305 is performed to increase the voltage value of the power signal.
當在步驟304中已經得知電源訊號所需要的調整值後，電流訊號處理模組60係控制電源供應模組30以提昇電源訊號之電壓值。如此一來，即增加傳輸至USB電子裝置21之電源訊號之電壓值，以避免USB電子裝置21所得到之電壓過低而無法作用。After the adjustment value required for the power signal is known in step 304, the current signal processing module 60 controls the power supply module 30 to increase the voltage value of the power signal. In this way, the voltage value of the power signal transmitted to the USB electronic device 21 is increased to prevent the voltage obtained by the USB electronic device 21 from being too low to function.
此處需注意的是，本發明之電壓調整之方法並不以上述之步驟次序為限，只要能達成本發明之目的，上述之步驟次序亦可加以改變。It should be noted here that the method of voltage adjustment of the present invention is not limited to the above-described order of steps, and the order of the above steps may be changed as long as the object of the present invention can be achieved.
由上述之描述可知，本發明之電壓調整電路10不需利用儲能元件來調整輸出到USB連接埠20之電壓。並且本發明可針對需求來調整電源訊號之電壓值，而不會造成能量的浪費。As can be seen from the above description, the voltage regulating circuit 10 of the present invention does not need to utilize the energy storage element to adjust the voltage output to the USB port 20. Moreover, the present invention can adjust the voltage value of the power signal for the purpose without causing waste of energy.
綜上所陳，本發明無論就目的、手段及功效，在在均顯示其迥異於習知技術之特徵，懇請 貴審查委員明察，早日賜准專利，俾嘉惠社會，實感德便。惟應注意的是，上述諸多實施例僅係為了便於說明而舉例而已，本發明所主張之權利範圍自應以申請專利範圍所述為準，而非僅限於上述實施例。To sum up, the present invention, regardless of its purpose, means and efficacy, shows its distinctive features of the prior art. You are requested to review the examination and express the patent as soon as possible. It should be noted that the various embodiments described above are merely illustrative for ease of explanation, and the scope of the invention is intended to be limited by the scope of the claims.
90．．．筆記型電腦90. . . Notebook computer
91．．．電壓源91. . . power source
92．．．電源轉換電路92. . . Power conversion circuit
93．．．限流電路93. . . Current limiting circuit
931．．．儲能元件931. . . Energy storage component
94．．．USB設備94. . . USB device
95．．．USB電子裝置95. . . USB electronic device
1‧‧‧電腦系統1‧‧‧ computer system
10‧‧‧電壓調整電路10‧‧‧Voltage adjustment circuit
20‧‧‧USB連接埠20‧‧‧USB connection埠
20a‧‧‧第一USB連接埠20a‧‧‧First USB port埠
20b‧‧‧第二USB連接埠20b‧‧‧Second USB port埠
20c‧‧‧第三USB連接埠20c‧‧‧ Third USB port埠
21‧‧‧USB電子裝置21‧‧‧USB electronic device
30‧‧‧電源供應模組30‧‧‧Power supply module
40‧‧‧電流限制模組40‧‧‧current limit module
40a‧‧‧第一電流限制模組40a‧‧‧First Current Limiting Module
40b‧‧‧第二電流限制模組40b‧‧‧Second current limiting module
40c‧‧‧第三電流限制模組40c‧‧‧ Third Current Limiting Module
41‧‧‧寄生電阻41‧‧‧Parasitic resistance
41a‧‧‧第一寄生電阻41a‧‧‧First parasitic resistance
50‧‧‧電流偵測模組50‧‧‧ Current detection module
50a‧‧‧第一電流偵測模組50a‧‧‧First current detection module
60‧‧‧電流訊號處理模組60‧‧‧current signal processing module
70‧‧‧內部電子裝置70‧‧‧Internal electronic devices
圖1係先前技術之限流電路之硬體架構示意圖。FIG. 1 is a schematic diagram of a hardware architecture of a prior art current limiting circuit.
圖2係本發明之電腦系統之示意圖。2 is a schematic illustration of a computer system of the present invention.
圖3係本發明之電壓調整之方法之步驟流程圖。3 is a flow chart showing the steps of the method of voltage adjustment of the present invention.
圖4係本發明之電壓調整電路之示意圖。4 is a schematic diagram of a voltage regulating circuit of the present invention.
1．．．電腦系統1. . . computer system
10．．．電壓調整電路10. . . Voltage adjustment circuit
20．．．USB連接埠20. . . USB port埠
21．．．USB電子裝置twenty one. . . USB electronic device
30．．．電源供應模組30. . . Power supply module
40．．．電流限制模組40. . . Current limiting module
41．．．寄生電阻41. . . Parasitic resistance
50．．．電流偵測模組50. . . Current detection module
60．．．電流訊號處理模組60. . . Current signal processing module
70．．．內部電子裝置70. . . Internal electronic device
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW98143308A TWI392990B (en) | 2009-12-17 | 2009-12-17 | Voltage regulating circuit, voltage regulating method, and computer system having the same |
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| Application Number | Priority Date | Filing Date | Title |
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| TW98143308A TWI392990B (en) | 2009-12-17 | 2009-12-17 | Voltage regulating circuit, voltage regulating method, and computer system having the same |
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| Publication Number | Publication Date |
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| TW201122751A TW201122751A (en) | 2011-07-01 |
| TWI392990B true TWI392990B (en) | 2013-04-11 |
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| TW98143308A TWI392990B (en) | 2009-12-17 | 2009-12-17 | Voltage regulating circuit, voltage regulating method, and computer system having the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI780338B (en) * | 2019-02-13 | 2022-10-11 | 威鋒電子股份有限公司 | Multi-port power supply apparatus and operation method thereof |
Citations (5)
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|---|---|---|---|---|
| US6541879B1 (en) * | 2001-03-23 | 2003-04-01 | Cypress Semiconductor Corp. | USB hub power management |
| US20040148451A1 (en) * | 2003-01-28 | 2004-07-29 | Ching-Chung Lai | USB controlling apparatus for data transfer between computers and method for the same |
| US6996727B1 (en) * | 2000-08-28 | 2006-02-07 | Cypress Semiconductor Corp. | Power supply for universal serial bus interface with programmable bus pullup resistor |
| US7159132B2 (en) * | 2002-03-07 | 2007-01-02 | Fuji Xerox Co., Ltd. | USB device that provides power that is different from power prescribed in the USB standard |
| TWI278737B (en) * | 2005-02-18 | 2007-04-11 | Acer Inc | Limited current circuit and computer system using the same |
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2009
- 2009-12-17 TW TW98143308A patent/TWI392990B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6996727B1 (en) * | 2000-08-28 | 2006-02-07 | Cypress Semiconductor Corp. | Power supply for universal serial bus interface with programmable bus pullup resistor |
| US6541879B1 (en) * | 2001-03-23 | 2003-04-01 | Cypress Semiconductor Corp. | USB hub power management |
| US7159132B2 (en) * | 2002-03-07 | 2007-01-02 | Fuji Xerox Co., Ltd. | USB device that provides power that is different from power prescribed in the USB standard |
| US20040148451A1 (en) * | 2003-01-28 | 2004-07-29 | Ching-Chung Lai | USB controlling apparatus for data transfer between computers and method for the same |
| TWI278737B (en) * | 2005-02-18 | 2007-04-11 | Acer Inc | Limited current circuit and computer system using the same |
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| TW201122751A (en) | 2011-07-01 |
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