CN208805542U - Load insertion detection circuit - Google Patents
Load insertion detection circuit Download PDFInfo
- Publication number
- CN208805542U CN208805542U CN201821074541.9U CN201821074541U CN208805542U CN 208805542 U CN208805542 U CN 208805542U CN 201821074541 U CN201821074541 U CN 201821074541U CN 208805542 U CN208805542 U CN 208805542U
- Authority
- CN
- China
- Prior art keywords
- impedor
- power supply
- current
- supply unit
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 238000003780 insertion Methods 0.000 title claims abstract description 54
- 230000037431 insertion Effects 0.000 title claims abstract description 54
- 238000012512 characterization method Methods 0.000 claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000005611 electricity Effects 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of load insertion detection circuits, the load insertion detection circuit includes current detection circuit, the current detection circuit receives the output end current of power supply unit, when the power supply unit output end current changing value reaches threshold value and continues for some time, then the first signal of characterization load insertion is exported.The utility model solve it is of the existing technology certain occasions can exist detect it is not sensitive enough, so as to cause can't detect load insertion the problem of, improve power supply unit detection load insertion detection sensitivity.
Description
Technical field
The utility model relates to power electronics fields, more specifically, being related to a kind of load insertion detection circuit.
Background technique
In practical applications, power supply unit needs first to have detected load insertion, to charge to load.Existing skill
Art has detected whether load insertion by detecting the variation of output voltage.As shown in Figure 1, the transmission of electricity pressure of power supply unit is V0,
In standby mode, switch S1 is disconnected after being first closed a period of time, and the voltage at the end capacitor C1 is equal to V0 this moment, if having mobile phone, iapd
After equal loads insertion, V0 can be lower, after the voltage difference of V0 and the end capacitor C1 reach certain threshold value, comparator overturning, and output
The signal of characterization load insertion, to detect that power supply unit has load to be inserted into.
The generation judged by accident in order to prevent, therefore threshold value value here is larger, therefore it is not clever enough to have detection in certain occasions
Quick, the problem of so as to cause can't detect load insertion, such as apple charging cable has been inserted on power supply unit (has electricity in circuit
Stream), if at this moment power supply unit is in insertion mobile phone, above-mentioned threshold value is not achieved in the variation of V0 at this time, then power supply unit identification is less than negative
Carry insertion.
Utility model content
In view of this, the present invention provides a kind of power supply unit load insertion detection electricity for improving detection sensitivity
Road, for solve it is of the existing technology certain occasions can exist detect it is not sensitive enough, so as to cause can't detect load insert
The problem of entering.
The utility model provides a kind of load insertion detection circuit, including current detection circuit, the current detecting electricity
Road receives the output end current of power supply unit, when the power supply unit output end current changing value reaches threshold value and continues one section
Between, then export the first signal of characterization load insertion.
Optionally, the output end current of power supply unit described in the current detection circuit real-time detection, when the power supply is set
When bigger than the output end current of the previous cycle first threshold of the output end current of standby current period, then characterization load insertion is exported
First signal.
Optionally, the current detection circuit receives the output end current of the power supply unit, when the power supply unit
Output end current than it is initial when power supply unit output end current big second threshold when, then export the first letter of characterization load insertion
Number.
Optionally, the current detection circuit obtain power supply unit output end current and it is initial when power supply unit output end electricity
The difference of stream then exports characterization when the difference of the power supply unit output end current reaches third threshold value and continues for some time
Load the first signal of insertion.
Optionally, the current detection mode of the power supply unit output end includes directly detection, by current mirror sensed or
It is detected by amplifier.
Optionally, the current detection circuit includes first resistor, second resistance, first capacitor and first comparator, electricity
The hot end in source is connected to the hot end of the power supply unit output end, one end of the second resistance by first resistor
The hot end of the power supply unit output end is connected, one end of the other end connection first capacitor of the second resistance is described
The other end of first capacitor connects the hot end of the power supply, and the first input end of the first comparator connects the power supply
Another two input terminal of the hot end of equipment output end, the first comparator connects the second resistance and the first capacitor
Common end, when the voltage of the first comparator first input end four threshold value bigger than the voltage of the second input terminal, then
First signal of one comparator output characterization load insertion.
Optionally, the current detection circuit includes null-type bridge circuit and comparison circuit, the null-type bridge circuit packet
Balanced bridge is included, the null-type bridge circuit receives the output electric current of power supply unit, when power supply unit is in standby, institute
The resistance value of impedor on null-type bridge circuit adjustment electric bridge is stated after balanced bridge reaches balance, the balanced bridge
Comparison circuit described in circuit connection；
When the output curent change of power supply unit, the electric current of the balanced bridge changes therewith, when the characterization power supply
The voltage change of the balanced bridge interlaminated resistance of equipment output end current variation value reaches the 5th threshold value and continues one section
Time, then the first signal that the load of comparison circuit output characterization is inserted into.
Optionally, the balanced bridge includes the first impedor, the second impedor, third impedor, the 4th resistance
Anti- element and the 5th impedor, first impedor and the second impedor are composed in series cascaded structure one, and described
Three impedors and the 4th impedor form cascaded structure two, and the cascaded structure one and the cascaded structure two are in parallel, institute
The one end for stating the connection of the 5th impedor connects the common end of first impedor and the second impedor, the 5th resistance
The other end of anti-element connects the common end of the third impedor and the 4th impedor, and the 5th impedor is flat
The interlaminated resistance of weighing apparatus electric bridge.
Optionally, the null-type bridge circuit further includes that balanced bridge adjusts circuit, and it is logical that the balanced bridge adjusts circuit
The resistance value of first impedor, the second impedor, third impedor or the 4th impedor in toning balance electric bridge is come
So that balanced bridge reaches balance.
Optionally, it includes differential amplifier circuit and controlled current source, the differential amplification that the balanced bridge, which adjusts circuit,
The voltage of 5th impedor on circuit receiving balance electric bridge, output connect the input terminal of the controlled current source, control
The electric current of the controlled current source is made, the first impedor, in the adjustable balanced bridge of the electric current of the controlled current source
The resistance value of two impedors, third impedor or the 4th impedor, so that adjustment electric bridge reaches balance.
Optionally, the load insertion detection circuit further includes voltage detecting circuit, receives the defeated of the power supply unit
Voltage out, when the output voltage changing value of the power supply unit reaches the 6th threshold value, then export characterization load insertion second is believed
Number, according to first signal or the second signal, obtains characterization power supply unit and start to the control signal of load discharge.
Compared with prior art, the technical solution of the utility model has the advantage that the utility model for existing skill
Power supply unit can be not sensitive enough in the presence of detecting in certain occasions in art, so as to cause can't detect the problem of load is inserted into, proposes
The variation of a kind of load insertion detection circuit, the electric current for obtaining power supply unit output end with the mode of number and simulation respectively is gone
Complete load insertion detection, and the power supply unit output end current initial value output end current changing value compared with
Hour, using output electric current difference come and threshold value comparison, thus obtain load insertion signal.The utility model can mention
The detection sensitivity of high power supply unit.
Detailed description of the invention
Fig. 1 is the partial structure diagram of prior art load insertion detection circuit；
Fig. 2 is the embodiment one that the utility model loads insertion detection circuit；
Fig. 3 is the embodiment two that the utility model loads insertion detection circuit.
Specific embodiment
It is described in detail below in conjunction with preferred embodiment of the attached drawing to the utility model, but the utility model is not merely
It is limited to these embodiments.The utility model covers any substitution made in the spirit and scope of the utility model, modification, equivalent
Method and scheme.
In order to make the public have thorough understanding to the utility model, in following the preferred embodiment in the utility model specifically
Concrete details is illustrated, and that this can also be understood completely is practical new for description without these details for a person skilled in the art
Type.
The utility model is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing
It is all made of more simplified form and uses non-accurate ratio, only to facilitate, lucidly aid in illustrating the utility model
The purpose of embodiment.
The utility model provides a kind of load insertion detection circuit, including current detection circuit, the current detecting electricity
Road receives the output end current of power supply unit, when the power supply unit output end current changing value reaches threshold value and continues one section
Between, then export the first signal of characterization load insertion.
The current detection circuit has two kinds of forms of number and simulation to go to realize the defeated current output terminal electricity of detection power supply unit
Stream.
In digital form, the output end current of power supply unit described in current detection circuit real-time detection, when the power supply is set
When bigger than the output end current of the previous cycle first threshold of the output end current of standby current period, then characterization load insertion is exported
First signal.
In analog form, the current detection circuit receives the output end current of the power supply unit, when the power supply is set
Standby output end current than it is initial when power supply unit output end current big second threshold when, then export the of characterization load insertion
One signal.
If Fig. 2 gives the embodiment one of above-mentioned simulated implementation mode, the current detection circuit includes first resistor R1,
The hot end of second resistance R2, first capacitor C1 and first comparator, power supply VCC is connected to the confession by first resistor R1
The hot end of electric equipment output end, one end of the second resistance R2 connect the hot end of the power supply unit output end,
One end of the other end connection first capacitor C1 of the second resistance R2, the other end of the first capacitor C1 connect the power supply
The hot end of VCC, the first input end of the first comparator connect the hot end A of the power supply unit output end, institute
Another two input terminal for stating first comparator connects the common end C of the second resistance R2 and the first capacitor C1, when described
When bigger than the voltage of the second input terminal four threshold value of the voltage of one comparator first input end, then first comparator output characterization is negative
Carry the first signal of insertion.The voltage difference of two input terminals of first comparator can characterize the output end electricity of power supply unit
The variation difference of stream.The output current value of the voltage characterization power supply unit of the A point is constant in power supply unit output end current
When, the voltage of C point is identical with A point voltage swing.When being accidentally inserted load resistance R9, the voltage of A point changes at once, and C point
Voltage will not change at once, with also initial value as, therefore the output end of power supply unit is electric when the voltage of C point can characterize initial
Stream.
Fig. 2 simply shows a kind of embodiment, does not include all embodiments, and the power supply that other modes are realized is set
Standby output end current and it is initial when power supply unit output end current comparison, the protection scope of the utility model it
It is interior.
The above method be will when the output end current of the power supply unit and it is initial when power supply unit output end current make
Compare, but when and output end current changing value larger in power supply unit output end initial current is smaller, the above method is then no longer suitable
With.And being that comparison is applicable in the way of difference comparsion, the current detection circuit obtains power supply unit output end electricity
The difference of power supply unit output end current when flowing and is initial, when the difference of power supply unit output end current variation reaches third
It threshold value and continues for some time, then exports the first signal of characterization load insertion.
Have much using the implementation of difference comparsion, embodiment two gives a kind of implementation in Fig. 3, according to flat
Weighing apparatus electric bridge comes so that the electric current on balanced bridge interlaminated resistance is 0, and the output end current of power supply unit when initial utilizes electric current bridge
Current variation value in circuit on intermediate resistance element characterizes the current variation value of power supply unit output end, power supply unit to
When machine state, balanced bridge adjusts the regulation of electrical circuit and balanced bridge is made to reach balance, and when loading insertion, balanced bridge is no longer flat
Weighing apparatus, and the changing value of power supply unit output end current can be characterized by the voltage on balanced bridge interlaminated resistance, to pass through
Voltage value in balanced bridge judges whether there is load insertion.But since current variation value is smaller, may cause to disturb, therefore
Duration excludes the case where disturbance for a period of time.
Its overall plan is as follows: the current detection circuit includes null-type bridge circuit and comparison circuit, the balance electricity
Bridge circuit includes balanced bridge, and the null-type bridge circuit receives the output electric current of power supply unit, when power supply unit is in standby
When state, the resistance value of impedor is after balanced bridge reaches balance on the null-type bridge circuit adjustment electric bridge, institute
It states null-type bridge circuit and connects the comparison circuit；
When the output curent change of power supply unit, the electric current of the balanced bridge changes therewith, when the characterization power supply
The voltage change of the balanced bridge interlaminated resistance of equipment output end current variation value reaches the 5th threshold value and continues one section
Time, then the first signal that the load of comparison circuit output characterization is inserted into.
As described in Figure 3, the current detection circuit includes null-type bridge circuit and comparison circuit, the null-type bridge circuit
Circuit is adjusted including balanced bridge, current mirror and balanced bridge.The output end voltage of the power supply unit is V0, R6 and R7 composition
Bleeder circuit output voltage is divided, by the electric current on R7 be power supply unit output electric current.It switching tube Q1 and opens
It closes pipe Q2 and forms current mirror, it will be by the current replication on R7 to balanced bridge resistance R2, that is, passing through on R2 by current mirror
Electric current can characterize through the electric current on R7.Q1, Q3, R2, R4 and R5 constitute balanced bridge, when passing through the electricity on R2 and R4
When flowing equal, the electric current on interlaminated resistance R5 is 0, i.e., the voltage at the both ends R5 is 0.Controlled current source, differential amplifier circuit and
Capacitor C2 constitutes balanced bridge and adjusts circuit, and the voltage on differential amplifier circuit receiving balance electric bridge interlaminated resistance R5 is defeated
Outlet connects the input terminal of controlled current source, controls the size of current of controlled current source, and the output end of the controlled current source connects
The control terminal of balanced bridge upper switch pipe Q3 is connect, and the control terminal of the switching tube Q3 connects capacitor C2, the capacitor C2's is another
One end ground connection.The controlled current source to capacitor C2 by charging, and to change the control terminal voltage of switching tube Q3, opens to change
The resistance value for closing pipe Q3, carrys out adjustment electric bridge and reaches balance.The current regulation electric current further includes two-way switch S2.
It should be noted that be the resistance value of regulating switch pipe Q3 in the present embodiment, in fact, Q1, Q3 in balanced bridge,
Any position of R2 and R4 can be replaced with adjustable resistance element, therefore balanced bridge adjusts circuit and can pass through adjusting
The resistance value of the impedor of Q2, Q3, R1 and R4 any position is come so that balanced bridge reaches balance, and balanced bridge adjusts circuit
Not only there was only a kind of form of the application, the method for the resistance element of the adjustment electric bridge of other forms is in the utility model
Protection scope in.
In standby mode, switch S2 first connects in p1 power supply unit, is made of differential amplifier circuit and controlled current source
Negative feedback loop makes balanced bridge reach balance, that is, the electric current for flowing through resistance R5 is 0, and the input of the differential amplifier circuit is
0, then the input of controlled current source becomes 0, and the voltage of capacitor C2 remains unchanged, so that the resistance value of switching tube Q3 is constant.Electric bridge is flat
After weighing apparatus, S2 is connect in p2, differential amplifier circuit is connected to the first input end of comparison circuit, the second input termination of comparison circuit
Receive the 5th threshold value；After loading access, difference becomes larger when the output valve of big circuit, when it is greater than five threshold values, then more electric
First signal of road output characterization load insertion.
The load insertion detection circuit further includes voltage detecting circuit, receives the output voltage of the power supply unit,
When the output voltage changing value of the power supply unit reaches the 6th threshold value, then the second signal of characterization load insertion is exported, according to
First signal or the second signal obtain characterization power supply unit and start to the control signal of load discharge.
It is presented in Fig. 3 the embodiment of voltage detecting circuit, the voltage detecting circuit includes first capacitor C1, first
Switch S1 and comparator U1, the first input end of the comparator U1 connect the hot end of the power supply unit output voltage,
The second input terminal of the comparator U1 is by the hot end of first switch S1 connection power supply unit output voltage, and described first
The second end of one end connection comparator U1 of capacitor C1, other end ground connection.According to first signal or the second signal,
Obtain the control signal that characterization power supply unit starts to charge.
In standby mode, switch S1 closure, after a period of time after capacitor C1 charging complete, S1 is disconnected power supply unit, this
The voltage for carving capacitor C1 is equal to the power supply unit output voltage V0 for being not inserted into load, waits whether detection load to be detected is inserted into.When
When load insertion, due to capacity effect, output voltage V0 can be reduced, when output voltage is when falling amplitude more than six threshold values,
Comparator overturning, the second signal of output characterization load insertion.
If input terminal itself is inserted with the charging cable of certain resistance-types, as described in Figure 3, charging cable can regard capacitor C3 as
With the parallel connection of resistance R8, when being inserted into load at this time, since voltage change is smaller at this time, so voltage detecting circuit may detect
Less than.And when such case, current detection circuit can detecte load insertion.
After the load of C4 and R9 parallel connection insertion, due to electricresistance effect, is increased by the electric current of Q2, then pass through the electric current of Q1
Also increase, bridge balance is broken, and the voltage of R4 is no longer 0, when the output of differential amplifier circuit is more than five threshold values and is held
When continuous certain time, the first signal of the comparison circuit output characterization load insertion.
Certain time why is wanted herein, is to judge by accident in order to prevent.The comparison circuit can by comparator and
RC circuit is realized.
In addition, the current detection mode of the power supply unit output end includes directly detecting, by current mirror sensed or lead to
Cross amplifier detection.Direct detection mode is provided as shown in embodiment one by current mirror sensed in example 2, and amplifier
Embodiment is not provided in detection the utility model, all examinations modes of the analogy method may each be above-mentioned three
Kind, but those of ordinary skill in the art, it can be appreciated that its implementation, therefore three kinds of detection modes are in the utility model
In protection scope.
The voltage detecting circuit only provides in example 2, in example 1 and adaptable.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (4)
1. a kind of load insertion detection circuit, it is characterised in that: including current detection circuit, the current detection circuit, which receives, to be supplied
The output end current of electric equipment, it is when the power supply unit output end current changing value reaches threshold value and continues for some time, then defeated
First signal of characterization load insertion out；
The current detection circuit includes first resistor, second resistance, first capacitor and first comparator, the hot end of power supply
The hot end of the power supply unit output end is connected to by first resistor, one end of the second resistance connects the power supply
The hot end of equipment output end, the second resistance the other end connection first capacitor one end, the first capacitor it is another
One end connects the hot end of the power supply, and the first input end of the first comparator connects the power supply unit output end
Hot end, the second input terminal of the first comparator connect the common end of the second resistance and the first capacitor, when
When bigger than the voltage of the second input terminal four threshold value of the voltage of the first comparator first input end, then first comparator exports
First signal of characterization load insertion.
2. a kind of load insertion detection circuit, it is characterised in that: including current detection circuit, the current detection circuit, which receives, to be supplied
The output end current of electric equipment, it is when the power supply unit output end current changing value reaches threshold value and continues for some time, then defeated
First signal of characterization load insertion out；
The current detection circuit includes null-type bridge circuit and comparison circuit, and the null-type bridge circuit includes balanced bridge,
The null-type bridge circuit receives the output electric current of power supply unit, when power supply unit is in standby, the balanced bridge
For the resistance value of impedor after balanced bridge reaches balance, the null-type bridge circuit connects institute on circuit adjustment electric bridge
State comparison circuit；
When the output curent change of power supply unit, the electric current of the balanced bridge changes therewith, when the characterization power supply unit
The voltage change of the balanced bridge interlaminated resistance of output end current changing value reaches the 5th threshold value and continues for some time,
Then the first signal of comparison circuit output characterization load insertion.
3. load insertion detection circuit according to claim 2, it is characterised in that: the balanced bridge includes the first impedance
Element, the second impedor, third impedor, the 4th impedor and the 5th impedor, first impedor and
Second impedor is composed in series cascaded structure one, and the third impedor and the 4th impedor form cascaded structure two,
The cascaded structure one and the cascaded structure two are in parallel, and one end of the 5th impedor connection connects first impedance
The other end of the common end of element and the second impedor, the 5th impedor connects the third impedor and the 4th
The common end of impedor, the 5th impedor are the interlaminated resistance of balanced bridge.
4. load insertion detection circuit according to claim 3, it is characterised in that: the null-type bridge circuit further includes putting down
The electric bridge that weighs adjusts circuit, and the balanced bridge adjusts circuit by adjusting the first impedor, the second impedance element in balanced bridge
The resistance value of part, third impedor or the 4th impedor is come so that balanced bridge reaches balance；The balanced bridge adjusts electricity
Road includes differential amplifier circuit and controlled current source, the 5th impedor on the differential amplifier circuit receiving balance electric bridge
Voltage, output connects the input terminal of the controlled current source, controls the electric current of the controlled current source, the controlled current flow
First impedor, the second impedor, third impedor or the 4th impedance element in the adjustable balanced bridge of the electric current in source
The resistance value of part, so that adjustment electric bridge reaches balance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821074541.9U CN208805542U (en) | 2018-07-06 | 2018-07-06 | Load insertion detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821074541.9U CN208805542U (en) | 2018-07-06 | 2018-07-06 | Load insertion detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208805542U true CN208805542U (en) | 2019-04-30 |
Family
ID=66228534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821074541.9U Withdrawn - After Issue CN208805542U (en) | 2018-07-06 | 2018-07-06 | Load insertion detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208805542U (en) |
-
2018
- 2018-07-06 CN CN201821074541.9U patent/CN208805542U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR950021947A (en) | Battery Chargers and Dischargers and Characterization Systems | |
| CN105301381B (en) | Automatic surge test system and test method | |
| TW201023473A (en) | The battery charging controller and battery balance charging controller | |
| CN104777432B (en) | Rechargeable battery safety detecting method and rechargeable battery safety detection circuit | |
| CN109030929A (en) | load insertion detection circuit and method | |
| CN205622210U (en) | Display screen with overvoltage protection | |
| CN106332376A (en) | Ripple wave eliminating circuit and LED (light-emitting diode) control circuit | |
| CN109307842A (en) | A kind of analog power that circuit is realized | |
| CN208805542U (en) | Load insertion detection circuit | |
| CN108226794A (en) | Secondary cell monitoring arrangement and method for diagnosing faults | |
| CN207083253U (en) | A kind of adaptive fast response circuit and LED drive circuit | |
| CN205427158U (en) | On -off is from equalizing resistance acquisition circuit | |
| CN109149973A (en) | Constant current output control circuit and its design method | |
| CN206193207U (en) | Device of individual cell state among parallelly connected double cell of detection | |
| CN103076561B (en) | On-off detection circuit and detection method thereof, and dual-purpose intelligent lamp comprising on-off detection circuit | |
| CN102647010B (en) | Four-series-lithium-battery-cell charge equalization control chip and control circuit thereof | |
| CN106325448B (en) | A kind of reset circuit and electronic equipment | |
| CN208654281U (en) | A kind of test circuit based on charging chip | |
| CN205608074U (en) | Comparison circuit's test fixture | |
| CN208969215U (en) | A kind of analog power that circuit is realized | |
| CN102012452B (en) | Method, device and circuit for detecting alternating voltage | |
| TWI669885B (en) | Battery charge and discharge management method and system | |
| CN112180265A (en) | Battery tester | |
| CN203350409U (en) | Switch detection circuit and dual-purpose intelligent lamp comprising switch detection circuit | |
| CN206756912U (en) | Voltage detecting circuit and circuit board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Patentee after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: JOULWATT TECHNOLOGY Inc.,Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190430 Effective date of abandoning: 20240524 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190430 Effective date of abandoning: 20240524 |