TWI579576B - Alternating current detecting apparatus - Google Patents
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本發明是有關於一種偵測裝置，且特別是有關於一種交流電源偵測裝置。 The present invention relates to a detecting device, and more particularly to an AC power detecting device.
電源供應裝置或電源系統是一種常見的電子裝置，其係用以提供電源給目標裝置(例如電腦、家電等)，藉以驅動目標裝置。一般來說，正常的交流電源的電壓範圍為介於90伏特至264伏特，如果電源系統提供的電壓不穩時，例如低於90伏特，將可能導致目標裝置的操作異常或損壞。因此，為了解決這個問題，通常是在電源系統與目標裝置之間設置一個電源偵測線路。 A power supply device or a power supply system is a common electronic device for providing power to a target device (such as a computer, home appliance, etc.) to drive the target device. In general, a normal AC power supply has a voltage range of 90 volts to 264 volts. If the voltage supplied by the power system is unstable, such as below 90 volts, it may cause abnormal operation or damage to the target device. Therefore, in order to solve this problem, it is common to provide a power detection line between the power system and the target device.
請參照圖1，圖1係繪示習知一種交流電源偵測裝置的電路結構示意圖。交流電源偵測裝置100主要是由分壓單元110、開關120、光耦合單元130與偵測元件140所構成。分壓單元110包含串接之三個電阻器111,112,113，其一端用以接收輸入電壓Vin，而另一端則耦接至參考地151。開關120係用以根據分壓單元110提供之分壓準位控制其之導通/截止(ON/OFF)狀態，進而控制流經光耦合單元130之發光二極體131的電流。光耦合單元130之光偶元件132係用以根據流經發光二極體131的電流，以控制其之導通/截止狀態，進而控制輸出至偵測元件140的電壓準位。偵測元件140 係用以根據來自光偶元件132的電壓準位控制其之輸出準位。此外，光偶元件132經由電阻器135耦接至大地152。 Please refer to FIG. 1. FIG. 1 is a schematic diagram showing the circuit structure of a conventional AC power detecting device. The AC power detecting device 100 is mainly composed of a voltage dividing unit 110, a switch 120, an optical coupling unit 130, and a detecting component 140. The voltage dividing unit 110 includes three resistors 111, 112, 113 connected in series, one end of which receives the input voltage Vin and the other end of which is coupled to the reference ground 151. The switch 120 is configured to control the ON/OFF state according to the voltage division level provided by the voltage dividing unit 110, thereby controlling the current flowing through the LEDs 131 of the optical coupling unit 130. The photocoupler element 132 of the optical coupling unit 130 is configured to control the on/off state of the current through the light emitting diode 131 to control the voltage level of the output to the detecting component 140. Detection component 140 It is used to control the output level of the light source element 132 according to its voltage level. Further, the photocoupler element 132 is coupled to the ground 152 via a resistor 135.
當交流電源供應器101突然斷電或電壓不穩時，亦即輸入電壓Vin由高準位(High)變為低準位(Low)時，此時分壓單元110提供至開關120之控制端的分壓準位也會由高準位變為低準位，接著開關120會變為截止狀態，而流經光偶元件132的電壓準位也會由高準位變為低準位，進而使偵測元件140之輸入電壓準位由高準位變為低準位，即可得知有電源不正常的情形。 When the AC power supply 101 is suddenly powered off or the voltage is unstable, that is, when the input voltage Vin changes from a high level (High) to a low level (Low), the voltage dividing unit 110 is provided to the control end of the switch 120 at this time. The voltage dividing level will also change from the high level to the low level, and then the switch 120 will become the off state, and the voltage level flowing through the photocoupler element 132 will also change from the high level to the low level, thereby When the input voltage level of the detecting component 140 changes from the high level to the low level, it can be known that the power supply is abnormal.
然而，依照圖1之習知交流電源偵測裝置100，當交流電源供應器101突然斷電時，由於電容器105還儲存有電荷，偵測元件140必須等到電容器105放完電後才會得知交流電源供應器101發生斷電情形，導致無法即時通知微控制器150執行對應的緊急處理操作。換言之，習知交流電源偵測裝置100不具有即時偵測機制，必須等到電容器105放完電才會有所反應。再者，依照圖1之交流電源偵測裝置100，由於使用的電子元件較多且電路架構較為複雜，因此成本也相對較高。 However, according to the conventional AC power detecting device 100 of FIG. 1, when the AC power supply 101 is suddenly powered off, since the capacitor 105 also stores electric charge, the detecting element 140 must wait until the capacitor 105 is discharged. The AC power supply 101 has a power outage condition, which makes it impossible to immediately notify the microcontroller 150 to perform a corresponding emergency processing operation. In other words, the conventional AC power detecting device 100 does not have an instant detection mechanism and must wait until the capacitor 105 is discharged. Furthermore, according to the AC power detecting device 100 of FIG. 1, since the number of electronic components used is large and the circuit structure is complicated, the cost is relatively high.
因此，本發明提出一種交流電源偵測裝置，具有可即時偵測及降低成本的優點。 Therefore, the present invention provides an AC power detecting device, which has the advantages of immediate detection and cost reduction.
本發明之目的在於提出一種交流電源偵測裝置，包括第一地端、第二地端、分壓單元及第一電阻器。第一地端具有交流電壓。第二地端具有接地電壓，其中第二地端與第一地端之間具有電壓差。分壓單元電 連接於第一地端與第二地端之間，用以根據交流電壓產生交流分壓於分壓單元之輸出端。第一電阻器電連接於分壓單元之輸出端與第二地端之間。 The object of the present invention is to provide an AC power detecting device including a first ground end, a second ground end, a voltage dividing unit and a first resistor. The first ground has an alternating voltage. The second ground has a ground voltage, wherein there is a voltage difference between the second ground and the first ground. Partition unit Connected between the first ground end and the second ground end for generating an alternating voltage component according to the alternating voltage to the output end of the voltage dividing unit. The first resistor is electrically connected between the output end of the voltage dividing unit and the second ground end.
依照本發明之交流電源偵測裝置，係透過分壓單元的分壓特性以及透過第一電阻器直接放電，不只具有可即時偵測交流電源供應器的供電情形，而且更具省電效果。 The AC power detecting device according to the present invention transmits the voltage dividing characteristic of the voltage dividing unit and directly discharges through the first resistor, and not only has the power supply condition for instantly detecting the AC power supply, but also has a power saving effect.
本發明之附加特徵及優點將於隨後的描述中加以說明使其更為明顯，或者可經由本發明的實踐而得知。本發明之其他目的及優點將可從本案說明書與其之申請專利範圍以及附加圖式中所述結構而獲得實現與達成。 Additional features and advantages of the invention will be set forth in the description in the description. Other objects and advantages of the present invention will be realized and attained by the description of the appended claims.
100,200,400‧‧‧交流電源偵測裝置 100,200,400‧‧‧AC power detection device
101,301‧‧‧交流電源供應器 101,301‧‧‧AC power supply
102,302‧‧‧整流電路 102,302‧‧‧Rectifier circuit
105,303,432‧‧‧電容器 105,303,432‧‧‧ capacitor
110,210,215‧‧‧分壓單元 110,210,215‧‧ ‧pressure unit
111,112,113,135,216,217,220,335,433‧‧‧電阻器 111,112,113,135,216,217,220,335,433‧‧‧Resistors
120,325‧‧‧開關 120,325‧‧‧ switch
130‧‧‧光耦合單元 130‧‧‧Optical coupling unit
131‧‧‧發光二極體 131‧‧‧Lighting diode
132‧‧‧光偶元件 132‧‧‧Photocouple components
140‧‧‧偵測元件 140‧‧‧Detection components
151,351‧‧‧一次側地端 151, 351 ‧ ‧ primary side ground
150,250,350‧‧‧微控制器 150,250,350‧‧‧Microcontrollers
152,352‧‧‧二次側地端 152,352‧‧‧second side ground
160,260,360‧‧‧目標裝置 160,260,360‧‧‧ target device
251‧‧‧第一地端 251‧‧‧ first ground
252‧‧‧第二地端 252‧‧‧Second ground
300‧‧‧電源系統 300‧‧‧Power system
320‧‧‧變壓器 320‧‧‧Transformers
321‧‧‧初級繞組 321‧‧‧Primary winding
322‧‧‧次級繞組 322‧‧‧Secondary winding
323‧‧‧輔助繞組 323‧‧‧Auxiliary winding
330‧‧‧開關控制電路 330‧‧‧Switch control circuit
340‧‧‧反饋電路 340‧‧‧ Feedback circuit
370‧‧‧第一整流濾波電路 370‧‧‧First rectification filter circuit
380‧‧‧第二整流濾波電路 380‧‧‧Second rectification filter circuit
430‧‧‧整流單元 430‧‧‧Rectifier unit
431‧‧‧二極體 431‧‧‧dipole
圖1係繪示習知一種交流電源偵測裝置的電路結構示意圖；圖2A係繪示本發明第一較佳實施例之交流電源偵測裝置的電路結構示意圖；圖2B係繪示本發明第二較佳實施例之交流電源偵測裝置的電路結構示意圖；圖3係繪示本發明較佳實施例之交流電源偵測裝置的電路結構示意圖；以及圖4係繪示本發明另一較佳實施例之交流電源偵測裝置的電路結構示意圖。 1 is a schematic diagram showing the circuit structure of a conventional AC power detecting device; FIG. 2A is a schematic diagram showing the circuit structure of an AC power detecting device according to a first preferred embodiment of the present invention; FIG. 2B is a view showing the present invention. FIG. 3 is a schematic diagram showing the circuit structure of an AC power detecting device according to a preferred embodiment of the present invention; and FIG. 4 is a view showing another preferred embodiment of the present invention. A schematic diagram of the circuit structure of the AC power detecting device of the embodiment.
請同時參照圖2A與圖3，圖2A係繪示本發明第一較佳實施例之交流電源偵測裝置的電路結構示意圖，以及圖3係繪示本發明較佳實施例之電源系統的電路結構示意圖。 2A and FIG. 3, FIG. 2A is a schematic diagram showing the circuit structure of the AC power detecting device according to the first preferred embodiment of the present invention, and FIG. 3 is a circuit diagram showing the power system of the preferred embodiment of the present invention. Schematic.
如圖2A所示，本發明之交流電源偵測裝置200包括分壓單元210與電阻器220。分壓單元210電連接於第一地端251與第二地端252之間，用以根據來自第一地端251之交流電壓Vac產生一交流分壓VDIV於分壓單元210之輸出端。電阻器220電連接於分壓單元210之輸出端與第二地端252之間。在本實施例中，第一地端251係耦接至如圖3所示之電源系統300的一次側地端(參考地)351，而第二地端252係耦接至如圖3所示之電源系統300的二次側地端(大地)352，其中第一地端251具有交流電壓Vac，第二地端252具有接地電壓GND，並且第一地端251與第二地端252之間具有電壓差。 As shown in FIG. 2A, the AC power detecting device 200 of the present invention includes a voltage dividing unit 210 and a resistor 220. The voltage dividing unit 210 is electrically connected between the first ground end 251 and the second ground end 252 for generating an AC voltage dividing voltage V DIV from the output end of the voltage dividing unit 210 according to the AC voltage Vac from the first ground end 251. The resistor 220 is electrically connected between the output end of the voltage dividing unit 210 and the second ground end 252. In this embodiment, the first ground end 251 is coupled to the primary side ground end (reference ground) 351 of the power system 300 as shown in FIG. 3, and the second ground end 252 is coupled to FIG. The secondary side ground (earth) 352 of the power system 300, wherein the first ground end 251 has an alternating voltage Vac, the second ground end 252 has a ground voltage GND, and between the first ground end 251 and the second ground end 252 Has a voltage difference.
在本實施例中，如圖2A所示，分壓單元210較佳是由至少兩個電容器211與電容器212串接形成，且這兩個電容器211與電容器212耦接於第一地端251與第二地端252之間，其中交流分壓VDIV是由電容器211與電容器212的分壓輸出點P1產生。此外，電容器211與電容器212的電容值分別可設計為相同或不同，換言之，可透過調整電容器211與電容器212的電容值來獲得所需的交流分壓VDIV。 In this embodiment, as shown in FIG. 2A, the voltage dividing unit 210 is preferably formed by connecting at least two capacitors 211 and a capacitor 212 in series, and the two capacitors 211 and 212 are coupled to the first ground end 251 and Between the second ground ends 252, wherein the AC divided voltage V DIV is generated by the capacitor 211 and the divided output point P1 of the capacitor 212. In addition, the capacitance values of the capacitor 211 and the capacitor 212 can be designed to be the same or different, in other words, the capacitance value of the capacitor 211 and the capacitor 212 can be adjusted to obtain the desired AC voltage division V DIV .
在圖2A之較佳實施例中，分壓單元210是由至少兩個電容器211與電容器212串接形成，然並非限於此，例如分壓單元210也可以是由其他電子元件所組成，只要能提供交流分壓VDIV就可。如圖2B所示，圖2B係繪示本發明第二較佳實施例之交流電源偵測裝置的電路結構示意圖。第二 實施例與第一實施例的差異在於，第二實施例之交流電源偵測裝置200的分壓單元215是以至少兩個串接的電阻器216與電阻器217取代第一實施例之電容器211與電容器212，其中交流分壓VDIV是由電阻器216與電阻器217的分壓輸出點P2產生。同樣地，電阻器216與電阻器217的電阻值分別可設計為相同或不同，亦即可透過調整電阻器216與電阻器217的電阻值來獲得所需的交流分壓VDIV。 In the preferred embodiment of FIG. 2A, the voltage dividing unit 210 is formed by connecting at least two capacitors 211 and the capacitor 212 in series. However, the voltage dividing unit 210 may be composed of other electronic components, as long as it can Provide AC partial voltage V DIV . As shown in FIG. 2B, FIG. 2B is a schematic diagram showing the circuit structure of an AC power detecting device according to a second preferred embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the voltage dividing unit 215 of the AC power detecting device 200 of the second embodiment replaces the first embodiment with at least two resistors 216 and resistors 217 connected in series. The capacitor 211 and the capacitor 212, wherein the AC divided voltage V DIV is generated by the resistor 216 and the divided output point P2 of the resistor 217. Similarly, the resistance values of the resistor 216 and the resistor 217 can be designed to be the same or different, that is, the resistance value of the resistor 216 and the resistor 217 can be adjusted to obtain the desired AC voltage division V DIV .
圖3所示為本發明較佳實施例之電源系統300，供與本發明之交流電源偵測裝置配合使用。如圖3所示，電源系統300包括交流電源供應器301、整流電路302、電容器303、變壓器320、開關325、開關控制電路330、反饋電路340、第一整流濾波電路370及第二整流濾波電路380。整流電路302及電容器303係用來對交流電源供應器301所提供之交流輸入電壓Vac執行整流濾波處理以產生輸入電壓Vin，且其一端分別耦接一次側地端351。變壓器320包含初級繞組321、次級繞組322及輔助繞組323，其中初級繞組321係用以接收輸入電壓Vin。第一整流濾波電路370之正輸出端耦接反饋電路340，其負輸出端耦接二次側地端352，第一整流濾波電路370係用來對次級繞組322感應之前置輸出電壓Vop執行整流濾波處理，以產生輸出電壓Vout並饋送至反饋電路340。反饋電路340係根據輸出電壓Vout產生反饋訊號Sfb並回授至開關控制電路330。第二整流濾波電路380係用來對輔助繞組323之感應電壓執行整流濾波處理，以產生電源電壓Vcc供應至開關控制電路330。開關控制電路330根據反饋訊號Sfb產生控制訊號Sc以控制開關325之導通/截止狀態，進而控制流經初級繞組321之電流。此外，開關325經由電阻器335耦接至一次側地端351。簡言之，上述一次側地端351係指電源系統300 之電壓輸入側(如圖3之變壓器320的電壓輸入端)的接地端，而二次側地端352係指電源系統300之電壓輸出側(如圖3之變壓器320的電壓輸出端)的接地端。 3 shows a power supply system 300 in accordance with a preferred embodiment of the present invention for use with the AC power detection device of the present invention. As shown in FIG. 3, the power system 300 includes an AC power supply 301, a rectifier circuit 302, a capacitor 303, a transformer 320, a switch 325, a switch control circuit 330, a feedback circuit 340, a first rectification filter circuit 370, and a second rectification filter circuit. 380. The rectifier circuit 302 and the capacitor 303 are configured to perform a rectification filtering process on the AC input voltage Vac provided by the AC power supply 301 to generate an input voltage Vin, and one end thereof is coupled to the primary side ground end 351, respectively. The transformer 320 includes a primary winding 321, a secondary winding 322, and an auxiliary winding 323, wherein the primary winding 321 is for receiving an input voltage Vin. The positive output end of the first rectifying and filtering circuit 370 is coupled to the feedback circuit 340, and the negative output end is coupled to the secondary side ground end 352. The first rectifying and filtering circuit 370 is used to sense the pre-output voltage Vop of the secondary winding 322. A rectification filtering process is performed to generate an output voltage Vout and feed it to the feedback circuit 340. The feedback circuit 340 generates a feedback signal Sfb according to the output voltage Vout and feeds it back to the switch control circuit 330. The second rectification filter circuit 380 is configured to perform a rectification filtering process on the induced voltage of the auxiliary winding 323 to generate a supply voltage Vcc to the switch control circuit 330. The switch control circuit 330 generates a control signal Sc according to the feedback signal Sfb to control the on/off state of the switch 325, thereby controlling the current flowing through the primary winding 321. Further, the switch 325 is coupled to the primary side ground end 351 via a resistor 335. In short, the primary side ground end 351 refers to the power supply system 300. The ground input end of the voltage input side (such as the voltage input end of the transformer 320 of FIG. 3), and the secondary side ground end 352 refers to the grounding of the voltage output side of the power supply system 300 (such as the voltage output end of the transformer 320 of FIG. 3). end.
請同時參照圖2A及圖3，由於第一地端251係耦接至如圖3所示之電源系統300的一次側地端351，而第二地端252係耦接至如圖3所示之電源系統300的二次側地端352，因此第一地端251的電壓值會隨著交流電壓Vac而變化，而第二地端252耦接大地故其電壓值為0伏特，使得第一地端251與第二地端252之間會保持有一電壓差。此外，在本實施例中，微控制器250係一種可處理交流分壓VDIV的微控制器。 Referring to FIG. 2A and FIG. 3, the first ground end 251 is coupled to the primary side ground end 351 of the power system 300 as shown in FIG. 3, and the second ground end 252 is coupled to the ground end 252 as shown in FIG. The secondary side ground 352 of the power system 300, so the voltage value of the first ground end 251 varies with the AC voltage Vac, and the second ground end 252 is coupled to the ground so that its voltage value is 0 volt, so that the first A voltage difference is maintained between the ground terminal 251 and the second ground terminal 252. Further, in the present embodiment, the microcontroller 250 is a microcontroller that can handle the AC divided voltage V DIV .
如圖2A所示，於操作中，當來自第一地端251之交流電壓Vac由高準位變為低準位時，分壓單元210輸出的交流分壓VDIV也會由高準位變為低準位。接著，微控制器250根據交流分壓VDIV之電壓準位變化發現此時可能發生斷電情形後，微控制器250會立即通知後端之目標裝置260執行對應之緊急處理操作，以避免因斷電造成目標裝置260的損壞或資料遺失等。 As shown in FIG. 2A, in operation, when the AC voltage Vac from the first ground terminal 251 changes from the high level to the low level, the AC voltage divider V DIV output by the voltage dividing unit 210 also changes from a high level. Low level. Then, after the microcontroller 250 detects that the power-off situation may occur at this time according to the voltage level change of the AC voltage divider V DIV , the microcontroller 250 immediately notifies the target device 260 of the back end to perform the corresponding emergency processing operation to avoid the cause. The power failure causes damage to the target device 260 or loss of data.
由上述可知，因本發明之交流電源偵測裝置200不具有習知交流電源偵測裝置100的電容器105，而是透過電阻器220直接放電，因此可即時得知交流電源供應器101發生斷電情形，並立即通知目標裝置260執行對應的緊急處理操作。此外，相較於習知交流電源偵測裝置100，本發明之交流電源偵測裝置200不只具有即時偵測機制，而且更具省電效果。 It can be seen from the above that the AC power detecting device 200 of the present invention does not have the capacitor 105 of the conventional AC power detecting device 100, but is directly discharged through the resistor 220, so that the AC power supply 101 can be immediately powered off. The situation is immediately notified to the target device 260 to perform a corresponding emergency processing operation. In addition, compared with the conventional AC power detecting device 100, the AC power detecting device 200 of the present invention not only has an instant detection mechanism, but also has a power saving effect.
請參照圖4，圖4係繪示本發明另一較佳實施例之交流電源偵測裝置的電路結構示意圖。如圖4所示，其與前述較佳實施例之差異在於，本實施例之交流電源偵測裝置400增加了整流單元430。此外，在本實施例 中，微控制器350係一種可處理直流電壓VDC的微控制器。 Please refer to FIG. 4. FIG. 4 is a schematic diagram showing the circuit structure of an AC power detecting device according to another preferred embodiment of the present invention. As shown in FIG. 4, the difference from the foregoing preferred embodiment is that the AC power detecting device 400 of the present embodiment adds a rectifying unit 430. Further, in the present embodiment, the microcontroller 350 is a microcontroller that can process the DC voltage V DC .
整流單元430電連接於分壓單元210之輸出端與第二地端252之間，用於接收交流分壓VDIV並將交流分壓VDIV轉換為直流電壓VDC。整流單元430較佳是由一二極體431、一電容器432與一電阻器433所組成。二極體431之輸入端耦接電阻器220之一端以接收交流分壓VDIV，而二極體431之輸出端電連接微控制器350。電容器432與電阻器433並聯，且耦接於二極體431之輸出端與電阻器220之另一端之間。 The rectifying unit 430 is electrically connected between the output end of the voltage dividing unit 210 and the second ground end 252 for receiving the AC divided voltage V DIV and converting the AC divided voltage V DIV into a DC voltage V DC . The rectifying unit 430 is preferably composed of a diode 431, a capacitor 432 and a resistor 433. The input end of the diode 431 is coupled to one end of the resistor 220 to receive the AC divided voltage V DIV , and the output end of the diode 431 is electrically connected to the microcontroller 350. The capacitor 432 is connected in parallel with the resistor 433 and coupled between the output end of the diode 431 and the other end of the resistor 220.
如圖4所示，於操作中，當來自第一地端251之交流電壓Vac由高準位變為低準位時，分壓單元210輸出的交流分壓VDIV也會由高準位變為低準位，進而使整流單元430輸出的直流電壓VDC由高準位變為低準位。當微控制器350接收到直流電壓VDC由高準位變為低準位時，微控制器350判斷此時可能發生斷電情形並立即通知後端之目標裝置360執行對應之緊急處理操作，以避免因斷電造成目標裝置360的損壞或資料遺失等。 As shown in FIG. 4, in operation, when the AC voltage Vac from the first ground terminal 251 changes from the high level to the low level, the AC voltage divider V DIV output by the voltage dividing unit 210 also changes from a high level. The low level is caused to cause the DC voltage V DC output from the rectifying unit 430 to change from a high level to a low level. When the microcontroller 350 receives the DC voltage V DC from the high level to the low level, the microcontroller 350 determines that a power outage situation may occur at this time and immediately notifies the target device 360 of the back end to perform the corresponding emergency processing operation. In order to avoid damage to the target device 360 or loss of data due to power failure.
綜上所述，本發明之交流電源偵測裝置係透過分壓單元的分壓特性，例如使用至少兩個電容器或電阻器串聯分壓特性，可以從第一地端(一次側地端)與第二地端(二次側地端)的分壓輸出點產生交流訊號，然後供微控制器即時判斷是否發生斷電情形，進而控制目標裝置立即執行緊急處理操作。 In summary, the AC power detecting device of the present invention transmits the voltage dividing characteristic of the voltage dividing unit, for example, using at least two capacitors or a series voltage dividing characteristic of the resistor, and can be connected from the first ground end (primary side ground end) The voltage dividing output point of the second ground end (secondary ground end) generates an alternating current signal, and then the microcontroller immediately determines whether a power outage occurs, thereby controlling the target device to immediately perform an emergency processing operation.
在不脫離本發明之精神或範圍內，熟習本技藝者可對本發明之遠端伺服器管理方法及相關裝置做各種修飾與變化。因此，在申請專利範圍及其均等之範圍內進行各種修飾與變化均包含於本發明之範圍內。 Various modifications and changes may be made to the remote server management method and related apparatus of the present invention without departing from the spirit and scope of the invention. Therefore, various modifications and changes are intended to be included within the scope of the invention.
200‧‧‧交流電源偵測裝置 200‧‧‧AC power detection device
210‧‧‧分壓單元 210‧‧‧Dividing unit
211,212‧‧‧電容器 211,212‧‧‧ capacitor
220‧‧‧電阻器 220‧‧‧Resistors
250‧‧‧微控制器 250‧‧‧Microcontroller
251‧‧‧第一地端 251‧‧‧ first ground
252‧‧‧第二地端 252‧‧‧Second ground
260‧‧‧目標裝置 260‧‧‧ Target device
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| US11835592B2 (en) | 2021-09-23 | 2023-12-05 | Infsitronix Technology Corporation | Method and circuit for monitoring voltage of power supply |
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| TW201249078A (en) * | 2011-05-18 | 2012-12-01 | Hon Hai Prec Ind Co Ltd | Alternating current voltage detection circuit |
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