CN203799398U - Long-distance high-frequency reader-writer - Google Patents
Long-distance high-frequency reader-writer Download PDFInfo
- Publication number
- CN203799398U CN203799398U CN201420152826.5U CN201420152826U CN203799398U CN 203799398 U CN203799398 U CN 203799398U CN 201420152826 U CN201420152826 U CN 201420152826U CN 203799398 U CN203799398 U CN 203799398U
- Authority
- CN
- China
- Prior art keywords
- terminal
- coupled
- switch
- frequency
- voltage
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model provides a long-distance high-frequency reader-writer. The long-distance high-frequency reader-writer includes a battery pack, an input inductor, a first power switch, an output capacitor, a second power switch, a voltage stabilizing circuit, a voltage dividing circuit which outputs first frequency signals, second frequency signals and third frequency signals, an input voltage sampling circuit, a voltage comparator, a first logic switch, a second logic switch, a third logic switch, a fourth logic switch, a frequency comparator, a sawtooth wave generator, and a control and driving circuit which generates two paths of complementary switch driving signals so as to control the switch-on and switch-off of the first power switch and the second power switch. When being stored, the long-distance high-frequency reader-writer of the utility model is in a standby state, and power consumption is low; when being moved, the long-distance high-frequency reader-writer is in a normal working condition, and the electricity supplying power of a radio frequency generation circuit can be compensated when electricity in the battery pack is insufficient, so that normal work of the radio frequency generation circuit can be ensured; and batteries in the battery pack, which run out of electricity or are damaged, are short circuited, so that the usage time of the battery pack can be prolonged.
Description
Technical field
The utility model relates to electronic technology field, particularly a kind of high frequency read write line.
Background technology
Traditional storage, prestowage management adopts manual mode, recording mode is loaded down with trivial details, inefficiency, easily make mistakes and also cost relatively high; Although most warehousing management adopts computer management system, but first record, input computer again, human factor is large, and accuracy rate is not high, easily occurs data falsification, waste of human resource, the problem that management maintenance cost is high.
High frequency read write line is a kind of contactless automatic identification technology, high frequency read write line is attached on packing, pallet or the shelf of each goods, in label, write the information such as physical resource, shelf location, warehouse compartment of goods, it is automatically identified destination object and is obtained related data by radiofrequency signal, and identification work need not manual intervention.
Remote high frequency read write line is when work, and because battery will provide electric energy to radio frequency circuit for generating always, so that receiver receives the radiofrequency signal of remote high frequency read write line, so the power consumption of battery is very large.How to improve remote high frequency read write line power supplying efficiency, lengthen working hours, be current problem demanding prompt solution.
Utility model content
The utility model proposes a kind of remote high frequency read write line, solved the large problem of prior art medium and long distance high frequency read write line power consumption.
The technical solution of the utility model is achieved in that
A remote high frequency read write line, comprising: electric battery, provides electric energy;
Described electric battery comprises n the battery being connected in series, and wherein n is natural number; N the shorting switch being connected in parallel with respective battery; And with n short circuit control circuit of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection; Described short circuit control circuit comprises: comparer, has in-phase input end, inverting input and output terminal; Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparer; Wherein said battery and shorting switch coupled in parallel are between the in-phase input end of comparer and the negative terminal of biasing circuit, and described shorting switch comprises the control end that is coupled to described comparator output terminal;
The input inductor being connected in series and the first power switch, be coupled in the input port of described electric battery and with reference between ground;
Output capacitor, is coupled in output port and with reference between ground, described output port is connected to radio frequency circuit for generating;
The second power switch, is coupled between the common point and output port of the first power switch and input inductor;
Mu balanced circuit, is coupled in the input port of described electric battery and with reference between ground, the reference voltage of stable output;
Bleeder circuit, be connected to the output terminal of described mu balanced circuit, described reference voltage is carried out to dividing potential drop, output first frequency signal, second frequency signal and the 3rd frequency signal, magnitude of voltage is followed successively by: first frequency signal < second frequency signal < the 3rd frequency signal;
Input voltage sample circuit, the voltage of the described electric battery input port of sampling, output electric battery sampled voltage;
Voltage comparator, has in-phase input end, inverting input and lead-out terminal, its inverting input threshold level voltage, and its in-phase input end is coupled to described electric battery sampled voltage, and its lead-out terminal produces voltage comparison signal;
The first logic switch, has the first terminal, the second terminal and control terminal, and its first terminal couples first frequency signal, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator;
The second logic switch, there is the first terminal, the second terminal and control terminal, its the first terminal couples second frequency signal, its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator, together with the second terminal of wherein said the first logic switch is coupled in the second terminal of the second logic switch;
The 3rd logic switch, has the first terminal, the second terminal and control terminal, and its first terminal couples the 3rd frequency signal, and its control terminal is coupled to vibration transducer and receives vibration induction signal;
The 4th logic switch, there is the first terminal, the second terminal and control terminal, its the first terminal couples the second terminal of the first logic switch and the second terminal of the second logic switch, its second terminal couples the second terminal of the 3rd logic switch, and its control terminal is coupled to vibration transducer and receives vibration induction signal;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and its inverting input is coupled to the second terminal receive frequency reference signal of the second terminal and the 4th logic switch of the 3rd logic switch, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides the in-phase input end of sawtooth signal to frequency comparator based on clock signal;
Control and driving circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce the switching drive signal of two-way complementation, to control the break-make of the first power switch and the second power switch.
Alternatively, described the first logic switch is low level conducting; Described the second logic switch is high level conducting; Described the 3rd logic switch is low level conducting; Described the 4th logic switch is high level conducting.
Alternatively, input voltage sample circuit comprises and is coupled in series in output port and with reference to the first resistance between ground and the second resistance, and wherein electric battery sampled voltage produces at the coupled in series Nodes of the first resistance and the second resistance.
Alternatively, described sawtooth generator comprises:
Charging current source, charging capacitor and reset switch, three's coupled in parallel at the in-phase input end of frequency comparator with reference to ground between, wherein
Described reset switch further comprises control terminal, and described control terminal is coupled to the lead-out terminal receive clock signal of frequency comparator.
The beneficial effects of the utility model are:
(1) high frequency read write line is in holding state when depositing, and power consumption is low;
(2), while moving, in normal operating conditions, and when battery electric quantity is not enough, the output power of correlation frequency circuit for generating compensates, and guarantees the normal work of radio frequency circuit for generating;
(3) battery that in short circuit electric battery, electric weight exhausts or damages, has extended the service time of electric battery.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit control block diagram of a kind of remote high frequency read write line of the utility model;
Fig. 2 is the circuit control block diagram of the electric battery of the remote high frequency read write line of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Existing high frequency read write line duty battery will provide electric energy to radio frequency circuit for generating always, so that receiver receives the radiofrequency signal of electronic switch, so the power consumption of battery is very large.
As shown in Figure 1, the utility model provides a kind of high frequency read write line, comprising: electric battery 117, for total system provides electric energy; Input port 101, the input voltage of reception electric battery 101; Output port 102, for radio frequency circuit for generating 116 provides supply voltage; The input inductor 103 being connected in series and the first power switch 104, be coupled in series in input port 101 and with reference between ground; Output capacitor 106, is coupled in output port 102 and with reference between ground, described output port 102 is connected to radio frequency circuit for generating 116; The second power switch 105, is coupled between the common electrical and output port 102 of the first power switch 104 and input inductor 103; Mu balanced circuit 118, is coupled in the input port of described electric battery 117 and with reference between ground, the reference voltage of stable output; Bleeder circuit 119, be connected to the output terminal of described mu balanced circuit 118, described reference voltage is carried out to dividing potential drop, output first frequency signal Vf1, second frequency signal Vf2 and the 3rd frequency signal Vf3, magnitude of voltage is followed successively by: first frequency signal Vf1< second frequency signal Vf2< the 3rd frequency signal Vf3; Input voltage sample circuit 120, the voltage of described electric battery 117 input ports of sampling, output electric battery sampled voltage Vfb; Voltage comparator 108, there is in-phase input end, inverting input and lead-out terminal, its inverting input threshold level voltage Vth, its in-phase input end is coupled to input voltage sample circuit 120 and receives electric battery sampled voltage Vfb, and its lead-out terminal produces voltage comparison signal; The first logic switch 109-1, has the first terminal, the second terminal and control terminal, and its first terminal couples first frequency signal Vf1, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator 108; The second logic switch 109-2 has the first terminal, the second terminal and control terminal, and its first terminal couples second frequency signal Vf2, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator 108; Together with the second terminal of wherein said the first logic switch 109-1 is coupled in the second terminal of the second logic switch 109-2; The 3rd logic switch 109-3 has the first terminal, the second terminal and control terminal, its the first terminal couples the 3rd frequency signal Vf3, its control terminal is coupled to vibration transducer 121 and receives vibration induction signal, vibration sensor 121 detects the vibrational state of packing, pallet or the shelf of goods, when goods vibration being detected, output pulse signal; The 4th logic switch 109-4 has the first terminal, the second terminal and control terminal, its the first terminal couples the second terminal of the first logic switch 109-1 and the second terminal of the second logic switch 109-2, its second terminal couples the second terminal of the 3rd logic switch 109-3, and its control terminal is coupled to vibration transducer 121 and receives vibration induction signal; Frequency comparator 110, there is in-phase input end, inverting input and lead-out terminal, its inverting input is coupled to the second terminal of the 3rd logic switch 109-3 and the second terminal receive frequency reference signal Vfr of the 4th logic switch 109-4, and its lead-out terminal provides clock signal clk; Sawtooth generator 111, is coupled to the lead-out terminal receive clock signal CLK of frequency comparator 110, and provides the in-phase input end of sawtooth signal Vsw to frequency comparator 110 based on clock signal clk; Control and driving circuit 112, be coupled to the lead-out terminal receive clock signal CLK of frequency comparator 110, and based on clock signal clk, produce the switching drive signal of two-way complementation, to control the break-make of the first power switch 104 and the second power switch 105.
Preferably, described the first logic switch 109-1 is low level conducting, and the second logic switch 109-2 is high level conducting, and described the 3rd logic switch is low level conducting, and described the 4th logic switch is high level conducting.
That is to say, when goods normal storage, vibration sensor 121 does not detect the vibrational state of goods, output low level, the 3rd logic switch 109-3 conducting, the 4th logic switch 109-4 turn-offs, frequency reference signal Vfr is the 3rd frequency signal Vf3, frequency reference signal Vfr is larger, the width of the high level signal of the clock signal clk of frequency comparator 110 outputs is less, control and driving circuit 112 to output to the dutycycle of pulse width of switching drive signal of the first power switch 104 less, the output power that outputs to radio frequency circuit for generating 116 is also less, the magnitude of voltage of the 3rd frequency signal Vf3 is maximum, radio frequency circuit for generating 116 is in holding state, the radiofrequency signal of transmitting is very little.
When goods is moved by fork truck, vibration sensor 121 detects the vibrational state of goods, output high level, and the 3rd logic switch 109-3 turn-offs, and the 4th logic switch 109-4 is open-minded, and now radio frequency circuit for generating 116 is in running order.When the electric weight of electric battery 117 is sufficient, when electric battery sampled voltage Vfb is greater than threshold voltage Vth, the first logic switch 109-1 is disconnected, the second logic switch 109-2 is switched on, and frequency reference signal Vfr is second frequency signal Vf2, and radio frequency circuit for generating 116 is in normal operating conditions, when the electric weight of electric battery 117 is not enough, when sampled voltage Vfb is less than threshold voltage Vth, the first logic switch 109-1 is switched on, the second logic switch 109-2 is disconnected, frequency reference signal Vfr is first frequency signal Vf1, the magnitude of voltage of first frequency signal Vf1 is minimum, the width of the high level signal of the clock signal clk of frequency comparator 110 outputs is maximum, control and driving circuit 112 to output to the dutycycle of pulse width of switching drive signal of the first power switch 104 maximum, therefore the output power that outputs to radio frequency circuit for generating 116 is compensated, radio frequency circuit for generating 116 maintains normal operating conditions.
Preferably, described sawtooth generator 111 comprises: charging current source 11, charging capacitor 12 and reset switch 13, three's coupled in parallel at the in-phase input end of frequency comparator 110 with reference to ground between, wherein said reset switch 13 further comprises control terminal, and described control terminal is coupled to the lead-out terminal receive clock signal CLK of frequency comparator 110.When clock signal clk is low level, reset switch 13 is disconnected, charging current source 11 gives charging capacitor 12 chargings, the voltage linear at charging capacitor 12 two ends increases, when it increases to the magnitude of voltage of frequency reference signal Vfr of frequency comparator 110 inverting inputs, the clock signal clk of frequency comparator 110 outputs becomes high level.Correspondingly, reset switch 13 is closed.So charging capacitor 12 is pulled to ground, the voltage at its two ends is reset to rapidly zero, and the voltage of frequency comparator 110 in-phase input ends is reset to zero.Subsequently, clock signal clk becomes low level, reset switch 13 is disconnected, charging current source 11 restarts to charging capacitor 12 charging, until charging capacitor 12 both end voltage again reach frequency comparator 110 inverting inputs frequency reference signal Vfr magnitude of voltage and trigger clock signal clk and become high level.Sawtooth generator 111 and frequency comparator 110 are worked as previously mentioned again and again, thereby produce periodically variable sawtooth signal Vsw and clock signal clk.
Preferably, input voltage sample circuit 120 comprises and is coupled in series in output port and with reference to the first resistance between ground and the second resistance, and wherein electric battery sampled voltage Vfb produces at the coupled in series Nodes of the first resistance and the second resistance.
Electric battery generally comprises the battery that multi-section serial connects, but a certain joint in electric battery or a few batteries power supply being when exhausting or damaging, and it is very large that the resistance of this battery will become.If continue to be connected in series to system power supply with other normal battery, this battery is lot of energy, thereby reduced efficiency, shortened the service time of electric battery.
As shown in Figure 2, electric battery 117 comprise the battery that n is connected in series (211,221 ..., 2n1), wherein n is natural number; N the shorting switch being connected in parallel with respective battery (212,222 ..., 2n2); And with n short circuit control circuit of respective battery coupled in parallel (213,223 ..., 2n3), described each short circuit control circuit receives respective battery both end voltage, and provide control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection, thus when respective battery both end voltage is very low by this battery short circuit.Short circuit control circuit in Fig. 2 (213,223 ..., 2n3) structure is identical, short circuit control circuit 213 comprises: comparer 2101, has in-phase input end, inverting input and output terminal; Biasing circuit 2102, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparer 2101; Wherein battery 211 and shorting switch 212 coupled in parallel are between the in-phase input end of comparer 2101 and the negative terminal of biasing circuit 102, and described shorting switch 212 comprises the control end that is coupled to described comparer 2101 output terminals.When described battery voltage short circuit control circuit 213 operation, the voltage that comparer 2101 its battery 211 both end voltage of comparison and biasing circuit 2102 provide.When the power supply of battery 211 exhausts or damages, while making voltage levvl that its both end voltage provides lower than biasing circuit 2102, comparer 2101 is shorting switch 212 conductings, with battery 211, thereby minimizes the resistance of this battery path.
High frequency read write line of the present utility model is in holding state when cargo storage, and power consumption is low; During goods movement, in normal operating conditions, and when battery electric quantity is not enough, the output power of correlation frequency circuit for generating compensates, and guarantees the normal work of radio frequency circuit for generating; And the battery that in short circuit electric battery, electric weight exhausts or damages, has extended the service time of electric battery.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. a remote high frequency read write line, is characterized in that, comprising: electric battery, provides electric energy;
Described electric battery comprises n the battery being connected in series, and wherein n is natural number; N the shorting switch being connected in parallel with respective battery; And with n short circuit control circuit of respective battery coupled in parallel, wherein said each short circuit control circuit receives respective battery both end voltage, and provides control signal according to respective battery both end voltage, in order to by corresponding shorting switch conducting or disconnection; Described short circuit control circuit comprises: comparer, has in-phase input end, inverting input and output terminal; Biasing circuit, has anode and negative terminal, and its anode is coupled to the in-phase input end of comparer; Wherein said battery and shorting switch coupled in parallel are between the in-phase input end of comparer and the negative terminal of biasing circuit, and described shorting switch comprises the control end that is coupled to described comparator output terminal;
The input inductor being connected in series and the first power switch, be coupled in the input port of described electric battery and with reference between ground;
Output capacitor, is coupled in output port and with reference between ground, described output port is connected to radio frequency circuit for generating;
The second power switch, is coupled between the common point and output port of the first power switch and input inductor;
Mu balanced circuit, is coupled in the input port of described electric battery and with reference between ground, the reference voltage of stable output;
Bleeder circuit, be connected to the output terminal of described mu balanced circuit, described reference voltage is carried out to dividing potential drop, output first frequency signal, second frequency signal and the 3rd frequency signal, magnitude of voltage is followed successively by: first frequency signal < second frequency signal < the 3rd frequency signal;
Input voltage sample circuit, the voltage of the described electric battery input port of sampling, output electric battery sampled voltage;
Voltage comparator, has in-phase input end, inverting input and lead-out terminal, its inverting input threshold level voltage, and its in-phase input end is coupled to described electric battery sampled voltage, and its lead-out terminal produces voltage comparison signal;
The first logic switch, has the first terminal, the second terminal and control terminal, and its first terminal couples first frequency signal, and its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator;
The second logic switch, there is the first terminal, the second terminal and control terminal, its the first terminal couples second frequency signal, its control terminal is coupled to the lead-out terminal receiver voltage comparison signal of voltage comparator, together with the second terminal of wherein said the first logic switch is coupled in the second terminal of the second logic switch;
The 3rd logic switch, has the first terminal, the second terminal and control terminal, and its first terminal couples the 3rd frequency signal, and its control terminal is coupled to vibration transducer and receives vibration induction signal;
The 4th logic switch, there is the first terminal, the second terminal and control terminal, its the first terminal couples the second terminal of the first logic switch and the second terminal of the second logic switch, its second terminal couples the second terminal of the 3rd logic switch, and its control terminal is coupled to vibration transducer and receives vibration induction signal;
Frequency comparator, has in-phase input end, inverting input and lead-out terminal, and its inverting input is coupled to the second terminal receive frequency reference signal of the second terminal and the 4th logic switch of the 3rd logic switch, and its lead-out terminal provides clock signal;
Sawtooth generator, is coupled to the lead-out terminal receive clock signal of frequency comparator, and provides the in-phase input end of sawtooth signal to frequency comparator based on clock signal;
Control and driving circuit, be coupled to the lead-out terminal receive clock signal of frequency comparator, and based on clock signal, produce the switching drive signal of two-way complementation, to control the break-make of the first power switch and the second power switch.
2. remote high frequency read write line as claimed in claim 1, is characterized in that,
Described the first logic switch is low level conducting;
Described the second logic switch is high level conducting;
Described the 3rd logic switch is low level conducting;
Described the 4th logic switch is high level conducting.
3. remote high frequency read write line as claimed in claim 1, it is characterized in that, input voltage sample circuit comprises and is coupled in series in output port and with reference to the first resistance between ground and the second resistance, and wherein electric battery sampled voltage produces at the coupled in series Nodes of the first resistance and the second resistance.
4. remote high frequency read write line as claimed in claim 1, is characterized in that, described sawtooth generator comprises:
Charging current source, charging capacitor and reset switch, three's coupled in parallel at the in-phase input end of frequency comparator with reference to ground between, wherein
Described reset switch further comprises control terminal, and described control terminal is coupled to the lead-out terminal receive clock signal of frequency comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420152826.5U CN203799398U (en) | 2014-03-26 | 2014-03-26 | Long-distance high-frequency reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420152826.5U CN203799398U (en) | 2014-03-26 | 2014-03-26 | Long-distance high-frequency reader-writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203799398U true CN203799398U (en) | 2014-08-27 |
Family
ID=51381596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420152826.5U Expired - Fee Related CN203799398U (en) | 2014-03-26 | 2014-03-26 | Long-distance high-frequency reader-writer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203799398U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391300A (en) * | 2015-12-05 | 2016-03-09 | 青岛盛嘉信息科技有限公司 | Switch circuit for radio-frequency circuit |
| CN105450025A (en) * | 2015-11-26 | 2016-03-30 | 青岛盛嘉信息科技有限公司 | Radio frequency power supply circuit |
| CN105515089A (en) * | 2015-11-27 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | High-frequency switch-based battery pack |
| CN105512713A (en) * | 2015-12-02 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | Radio frequency (RF) cell |
| CN105515385A (en) * | 2015-12-02 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | Boost converter |
-
2014
- 2014-03-26 CN CN201420152826.5U patent/CN203799398U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450025A (en) * | 2015-11-26 | 2016-03-30 | 青岛盛嘉信息科技有限公司 | Radio frequency power supply circuit |
| CN105515089A (en) * | 2015-11-27 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | High-frequency switch-based battery pack |
| CN105512713A (en) * | 2015-12-02 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | Radio frequency (RF) cell |
| CN105515385A (en) * | 2015-12-02 | 2016-04-20 | 青岛盛嘉信息科技有限公司 | Boost converter |
| CN105391300A (en) * | 2015-12-05 | 2016-03-09 | 青岛盛嘉信息科技有限公司 | Switch circuit for radio-frequency circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203799398U (en) | Long-distance high-frequency reader-writer | |
| CN203799382U (en) | Automatic warehouse entering and exiting system | |
| CN102882244B (en) | Battery managing system | |
| CN203799405U (en) | Radio frequency identification (RFID) tag | |
| CN105449840A (en) | An intelligent sensor using wireless charging technology and an application system thereof | |
| CN105099184A (en) | Light-load switching power supply chip | |
| CN105811761A (en) | Current sampling circuit and boost circuit integrated with current sampling circuit | |
| CN104022642A (en) | Output driver for energy recovery from inductor based sensor | |
| RU2010102947A (en) | METHOD AND SYSTEM OF MANAGEMENT OF DISCONNECTIONS OF ELECTRIC POWER SUPPLY ON THE BOARD OF THE AIRCRAFT | |
| CN103036285A (en) | Super capacitor charging circuit | |
| CN103078512A (en) | Flyback switch circuit of switch frequency hopping | |
| CN102944259B (en) | Wireless passive measuring device | |
| CN104953701A (en) | Isolation type battery power supply scheme | |
| CN104283422A (en) | Boosting converting circuit and drive control module thereof | |
| CN105450025A (en) | Radio frequency power supply circuit | |
| EP3223027B1 (en) | Common mode noise simulator | |
| CN105515089A (en) | High-frequency switch-based battery pack | |
| CN105391300A (en) | Switch circuit for radio-frequency circuit | |
| CN210090544U (en) | Isolated direct current voltage sampling circuit | |
| CN105512713A (en) | Radio frequency (RF) cell | |
| CN105389530A (en) | Radio-frequency circuit | |
| CN205017222U (en) | Switching power supply and electronic equipment | |
| CN105515385A (en) | Boost converter | |
| CN105550735A (en) | Battery pack | |
| CN202584170U (en) | Reader-writer having charging function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20170326 |