CN105450025A - Radio frequency power supply circuit - Google Patents
Radio frequency power supply circuit Download PDFInfo
- Publication number
- CN105450025A CN105450025A CN201510844296.XA CN201510844296A CN105450025A CN 105450025 A CN105450025 A CN 105450025A CN 201510844296 A CN201510844296 A CN 201510844296A CN 105450025 A CN105450025 A CN 105450025A
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- Prior art keywords
- terminal
- coupled
- signal
- voltage
- frequency
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0016—Control circuits providing compensation of output voltage deviations using feedforward of disturbance parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a radio frequency power supply circuit for supplying electric energy, comprising an input inductor and a first power switch which are connected in series, an output capacitor, a second power switch, a voltage dividing circuit which outputs a first frequency signal, a second frequency signal and a third frequency signal, 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 generator, and a control and drive circuit which generates two way complementary switch driving signals in order to control the connection and disconnection of the first power switch and the second power switch. The power supply circuit is low in electric consumption in a standby state, can compensate the electric power when the electric quantity of the battery unit is insufficient, and thus guarantees the normal operation of the circuit.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of radio frequency powered circuit.
Background technology
RFID radio circuit is a kind of contactless automatic identification technology, RFID is attached on the packaging of each goods, pallet or shelf, the information such as the physical resource of goods, shelf location, warehouse compartment are write in RFID, it automatically identifies destination object by radiofrequency signal and obtains related data, and the work of identification need not manual intervention.
The environment for use of RFID is often relatively more severe, and is attached on the packaging of each goods, pallet or shelf, and mechanical collision is strong, and the output of radiofrequency signal is affected.In-built electrical battery-powered RFID also claim active RFID, and its power exporting radiofrequency signal is stronger, and Distance geometry penetration power more has superiority, uses more extensive.But active RFID due to battery will always give radio frequency circuit for generating electric energy is provided, with the radiofrequency signal making receiver receive RFID, therefore the power consumption of battery is very large, the electricity of battery was decayed along with the time, output signal can reduce gradually, when dump energy is not enough to the long-distance transmissions supporting radiofrequency signal, goods information cannot upgrade automatically, causes unnecessary loss.
Summary of the invention
The present invention proposes a kind of radio frequency powered circuit, solve active RFID power consumption in prior art large, export the problem that radiofrequency signal cannot realize long-distance transmissions along with time decay due to the electricity of battery.
Technical scheme of the present invention is achieved in that
A kind of radio frequency powered circuit, comprising:
The input inductor be connected in series and the first power switch, be coupled between the input port of described battery pack and reference ground;
Output capacitor, is coupled in output port and with reference between ground, described output port is connected to radio frequency circuit for generating;
Second power switch, between the common point being coupled in the first power switch and input inductor and output port;
Voltage stabilizing circuit, is coupled between the input port of described battery pack and reference ground, the reference voltage of stable output;
Bleeder circuit, be connected to the output of described voltage stabilizing circuit, described reference voltage is carried out dividing potential drop, export 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 described battery pack input port of sampling, exports battery pack 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 battery pack sampled voltage, and its lead-out terminal produces voltage comparison signal;
First logic switch, have the first terminal, the second terminal and control terminal, 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;
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 first logic switch is coupled in the second terminal of the second logic switch;
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 vibrating sensor and receives vibration induction signal;
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 vibrating sensor 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 of the 3rd logic switch and the second terminal reception frequency reference signal of the 4th 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 sawtooth signal to the in-phase input end of frequency comparator based on clock signal; 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 between ground, wherein
Described reset switch comprises control terminal further, and described control terminal is coupled to the lead-out terminal receive clock signal of frequency comparator;
Control and drive 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.
The invention has the beneficial effects as follows:
(1) RFID is in holding state, and power consumption is low;
(2) RFID is in normal operating conditions, and when battery electric quantity is not enough, the output power of radio frequency circuit for generating compensates, and ensures the normal work of radio frequency circuit for generating.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the control block diagram of a kind of radio frequency powered circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Existing active RFID operating state battery will provide electric energy to radio frequency circuit for generating always, with the radiofrequency signal making receiver receive electronic switch, therefore the power consumption of battery is very large, the electricity of battery was decayed along with the time, output signal can reduce gradually, when dump energy is not enough to the long-distance transmissions supporting radiofrequency signal, goods information cannot upgrade automatically, causes unnecessary loss.
As shown in Figure 1, the invention provides a kind of radio frequency powered circuit, comprising: input port 101, receive the input voltage of battery pack; Output port 102, for radio frequency circuit for generating 116 provides supply power voltage; The input inductor 103 be connected in series and the first power switch 104, be coupled in series between input port 101 and reference 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; Second power switch 105, between the common electrical being coupled in the first power switch 104 and input inductor 103 and output port 102; Voltage stabilizing circuit 118, is coupled between the input port of described battery pack 117 and reference ground, the reference voltage of stable output; Bleeder circuit 119, be connected to the output of described voltage stabilizing circuit 118, described reference voltage is carried out dividing potential drop, export 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 battery pack 117 input port of sampling, exports battery pack 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 battery pack sampled voltage Vfb, and its lead-out terminal produces voltage comparison signal; 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; 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 second terminal of wherein said first logic switch 109-1 is coupled in second terminal of the second logic switch 109-2; 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 vibrating sensor 121 and receives vibration induction signal, vibration sensor 121 detects the vibrational state of the packaging of goods, pallet or shelf, when detecting that goods vibrates, output pulse signal; 4th logic switch 109-4 has the first terminal, the second terminal and control terminal, its the first terminal couples second terminal of the first logic switch 109-1 and second terminal of the second logic switch 109-2, its second terminal couples second terminal of the 3rd logic switch 109-3, and its control terminal is coupled to vibrating sensor 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 second terminal of the 3rd logic switch 109-3 and the second terminal reception 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 sawtooth signal Vsw to the in-phase input end of frequency comparator 110 based on clock signal clk; Control and drive 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 first logic switch 109-1 is low level conducting, and the second logic switch 109-2 is high level conducting, and described 3rd logic switch is low level conducting, and described 4th logic switch is high level conducting.
That is, when vibration sensor 121 does not detect the vibrational state of goods, output low level, 3rd logic switch 109-3 conducting, 4th logic switch 109-4 turns off, 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 that frequency comparator 110 exports is less, the duty ratio that control and drive circuit 112 output to the pulse duration of the switching drive signal of the first power switch 104 is less, the output power outputting 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 launching is very little.
When vibration sensor 121 detects the vibrational state of goods, export high level, the 3rd logic switch 109-3 turns off, and the 4th logic switch 109-4 is open-minded, and now radio frequency circuit for generating 116 is in running order.When the electricity of battery pack 117 is sufficient, when battery pack sampled voltage Vfb is greater than threshold voltage Vth, 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 electricity of battery pack 117 is not enough, when sampled voltage Vfb is less than threshold voltage Vth, first logic switch 109-1 is switched on, 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 that frequency comparator 110 exports is maximum, the duty ratio that control and drive circuit 112 output to the pulse duration of the switching drive signal of the first power switch 104 is maximum, therefore the output power outputting 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 is at the in-phase input end of frequency comparator 110 with reference between ground, wherein said reset switch 13 comprises control terminal further, 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, then charging current source 11 charges to charging capacitor 12, the voltage linear at charging capacitor 12 two ends increases, when it increases to the magnitude of voltage of the frequency reference signal Vfr of frequency comparator 110 inverting input, the clock signal clk that frequency comparator 110 exports 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 zero rapidly, and namely the voltage of frequency comparator 110 in-phase input end is reset to zero.Subsequently, clock signal clk becomes low level, reset switch 13 is disconnected, charging current source 11 restarts to charge to charging capacitor 12, until charging capacitor 12 both end voltage reaches the magnitude of voltage of the frequency reference signal Vfr of frequency comparator 110 inverting input again and shot clock signal CLK becomes high level.Sawtooth generator 111 and frequency comparator 110 work as previously mentioned again and again, thus 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, wherein battery pack sampled voltage Vfb produces at the coupled in series Nodes of the first resistance and the second resistance.
Radio frequency powered circuit of the present invention, be in holding state during cargo storage, power consumption is low; During goods movement, be in normal operating conditions, and the output power of radio frequency circuit for generating compensates when battery electric quantity is not enough, ensures the normal work of radio frequency circuit for generating.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a radio frequency powered circuit, is characterized in that, comprising:
The input inductor be connected in series and the first power switch, be coupled between the input port of described battery pack and reference ground;
Output capacitor, is coupled in output port and with reference between ground, described output port is connected to radio frequency circuit for generating;
Second power switch, between the common point being coupled in the first power switch and input inductor and output port;
Voltage stabilizing circuit, is coupled between the input port of described battery pack and reference ground, the reference voltage of stable output;
Bleeder circuit, be connected to the output of described voltage stabilizing circuit, described reference voltage is carried out dividing potential drop, export 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 described battery pack input port of sampling, exports battery pack 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 battery pack sampled voltage, and its lead-out terminal produces voltage comparison signal;
First logic switch, have the first terminal, the second terminal and control terminal, 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;
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 first logic switch is coupled in the second terminal of the second logic switch;
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 vibrating sensor and receives vibration induction signal;
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 vibrating sensor 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 of the 3rd logic switch and the second terminal reception frequency reference signal of the 4th 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 sawtooth signal to the in-phase input end of frequency comparator based on clock signal; 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 between ground, wherein
Described reset switch comprises control terminal further, and described control terminal is coupled to the lead-out terminal receive clock signal of frequency comparator;
Control and drive 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844296.XA CN105450025A (en) | 2015-11-26 | 2015-11-26 | Radio frequency power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510844296.XA CN105450025A (en) | 2015-11-26 | 2015-11-26 | Radio frequency power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105450025A true CN105450025A (en) | 2016-03-30 |
Family
ID=55559908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510844296.XA Withdrawn CN105450025A (en) | 2015-11-26 | 2015-11-26 | Radio frequency power supply circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN105450025A (en) |
Cited By (2)
| 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 |
| CN111933088A (en) * | 2020-08-19 | 2020-11-13 | 惠科股份有限公司 | Power generation circuit and display device thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203799398U (en) * | 2014-03-26 | 2014-08-27 | 青岛宝井钢材加工配送有限公司 | Long-distance high-frequency reader-writer |
| CN104771140A (en) * | 2015-03-13 | 2015-07-15 | 江苏物联网研究发展中心 | RFID-based self-powered intelligent sensor |
-
2015
- 2015-11-26 CN CN201510844296.XA patent/CN105450025A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203799398U (en) * | 2014-03-26 | 2014-08-27 | 青岛宝井钢材加工配送有限公司 | Long-distance high-frequency reader-writer |
| CN104771140A (en) * | 2015-03-13 | 2015-07-15 | 江苏物联网研究发展中心 | RFID-based self-powered intelligent sensor |
Cited By (2)
| 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 |
| CN111933088A (en) * | 2020-08-19 | 2020-11-13 | 惠科股份有限公司 | Power generation circuit and display device thereof |
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Application publication date: 20160330 |