CN220022416U - Circuit and electronic equipment get - Google Patents
Circuit and electronic equipment get Download PDFInfo
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- CN220022416U CN220022416U CN202321674830.3U CN202321674830U CN220022416U CN 220022416 U CN220022416 U CN 220022416U CN 202321674830 U CN202321674830 U CN 202321674830U CN 220022416 U CN220022416 U CN 220022416U
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- 239000003990 capacitor Substances 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 16
- 238000010586 diagram Methods 0.000 description 12
- 238000003306 harvesting Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
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Abstract
The embodiment of the utility model provides a circuit and electronic equipment, the circuit includes: an antenna for receiving energy in an environment and converting the energy into electrical energy; the rectifier bridge circuit is connected with the antenna and used for rectifying electric energy; the storage is connected with the rectifier bridge circuit and used for storing rectified electric energy; the DC conversion circuit is used for connecting the memories, and when the voltage of the memories reaches a preset voltage, the DC conversion circuit is started and processes the electric energy stored in the memories to output a stable direct current signal; the load circuit is connected with the DC conversion circuit and is powered by a direct current signal provided by the DC conversion circuit; and the NFC chip is connected with the antenna and outputs the processed electric energy to supply power to the load circuit before the DC conversion circuit is started. The direct current signal provided by the load circuit is more stable and higher in power than the energy provided by the NFC chip, so that the load circuit works stably, and meanwhile, the load circuit with higher power can be driven.
Description
Technical Field
The present utility model relates to the field of electronic technologies, and in particular, to a power supply circuit and an electronic device.
Background
Currently, in the NFC products, the NFC products mainly include an active NFC product and a passive NFC product, the active NFC product includes a battery, a main control circuit and an NFC circuit, the main control circuit and the like consume energy of the battery all the time, and after the energy of the battery is consumed, the battery needs to be replaced, so that the NFC product is inconvenient to use and is not environment-friendly. The passive NFC product does not require a battery, and the NFC circuit of the passive NFC product can draw energy from other devices to power the passive NFC circuit. However, the energy acquired by the NFC circuit of the passive NFC product is not stable, and the circuit within the passive NFC product is not stable in operation.
Disclosure of Invention
The embodiment of the utility model provides a circuit and electronic equipment, which can process energy acquired by an antenna to output a stable direct current signal, so that a load circuit works stably.
In a first aspect, an embodiment of the present utility model provides a power extracting circuit, including:
an antenna for receiving energy in an environment and converting the energy into electrical energy;
the rectifier bridge circuit is connected with the antenna and used for rectifying the electric energy;
the storage is connected with the rectifier bridge circuit and used for storing rectified electric energy;
the DC conversion circuit is used for connecting the memories, and when the voltage of the memories reaches a preset voltage, the DC conversion circuit is started and processes the electric energy stored in the memories so as to output a stable direct current signal;
a load circuit connected to the DC conversion circuit, the load circuit being powered by the direct current signal provided by the DC conversion circuit;
and the NFC chip is connected with the antenna and outputs the processed electric energy to supply power to the load circuit before the DC conversion circuit is started.
In some embodiments, the DC conversion circuit includes:
a DC conversion chip;
the LC circuit comprises a first inductor and a first capacitor, one end of the first inductor is connected with the output end of the DC conversion chip, the other end of the first inductor is connected with the load circuit, one end of the first capacitor is connected with the other end of the first inductor, and the other end of the first capacitor is grounded.
In some embodiments, the load circuit comprises:
and the main control chip is firstly used for receiving the electric energy transmitted by the NFC chip and then receiving the direct current signal of the DC conversion circuit to supply power.
In some embodiments, the load circuit further comprises:
the driving circuit is connected with the main control chip and the DC conversion circuit, and the driving circuit is started or closed under the control of the main control chip by utilizing a direct current signal provided by the DC conversion circuit.
In some embodiments, the main control chip performs wireless communication with an external device through the NFC chip and the antenna.
In some embodiments, the antenna operates at a frequency in the range of 15M to 20M.
In some embodiments, the antenna transmits the data signal and the energy signal either time-sharing or simultaneously.
In some embodiments, the antennas include a first antenna that transmits the energy signal and a second antenna that transmits the data signal.
In some embodiments, the memory includes a storage capacitor having one end connected to the input of the DC conversion circuit and the other end grounded.
In a second aspect, an embodiment of the present utility model further provides an electronic device, including:
the power taking circuit is any one of the power taking circuits.
In the embodiment of the utility model, the antenna receives energy in the environment and converts the energy into electric energy, so that the passive power supply of the power taking circuit is realized. The NFC chip may process the electrical energy acquired by the antenna to power the load. The rectifying bridge circuit can rectify the electric energy obtained by the antenna, the storage device stores the rectified electric energy, and the DC conversion circuit processes the electric energy stored by the storage device to output a stable direct current signal, so that the stable direct current signal is provided for the load circuit. The direct current signal provided by the load circuit is more stable and higher in power than the energy provided by the NFC chip, so that the load circuit works stably, and meanwhile, the load circuit with higher power can be driven.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
For a more complete understanding of the present utility model and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts throughout the following description.
Fig. 1 is a schematic diagram of a first structure of a power extraction circuit according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram of a second structure of the power extraction circuit according to the embodiment of the present utility model.
Fig. 3 is a schematic diagram of a third structure of the power extraction circuit according to the embodiment of the present utility model.
Fig. 4 is a schematic diagram of a fourth configuration of the power extraction circuit according to the embodiment of the present utility model.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present utility model.
Fig. 6 is another schematic structural diagram of an electronic device according to an embodiment of the present utility model.
Reference numerals:
100. an electronic device;
10. a power take-off circuit;
11. an antenna 112, a first antenna 114, a second antenna;
12. a rectifier bridge circuit;
13. a memory;
14. a DC conversion circuit 142, a DC conversion chip 144, and an LC circuit;
15. the load circuit 152, the main control chip 154 and the driving circuit;
16. NFC chip.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model based on the embodiments of the present utility model.
Referring to fig. 1, fig. 1 is a schematic diagram of a first structure of a circuit for extracting power according to an embodiment of the utility model. The embodiment of the utility model provides a circuit 10, wherein the circuit 10 comprises an antenna 11, a rectifier bridge circuit 12, a memory 13, a DC conversion circuit 14, a load circuit 15 and an NFC chip 16.
The antenna 11 is configured to receive energy in the environment and convert the energy into electric energy, and the antenna 11 may be an NFC antenna 11, i.e. obtain a corresponding radio frequency signal from the environment by using NFC technology and convert the radio frequency signal into electric energy.
The NFC chip 16 is connected to the antenna 11, and processes the power to output to supply power to the load circuit 15.
The rectifier bridge circuit 12 is connected to the antenna 11 for rectifying the electric energy. Specifically, the rectifier bridge circuit 12 includes two input terminals and two output terminals, the two input terminals are respectively connected to two ports of the antenna 11, and the two output terminals are used for outputting rectified signals. In some examples, the rectifier bridge circuit 12 may rectify the sine wave signal output from the antenna 11 and output a half wave signal.
The memory 13 is connected to the rectifier bridge 12 for storing the rectified electrical energy. The memory 13 cooperates with the rectifier bridge 12 to rectify the sine wave ac signal generated by the antenna 11 and store the energy generated by the NFC antenna 11 in the form of a charge pump on the memory 13 by means of a boost.
The DC conversion circuit 14 is connected to the memory 13, and when the voltage of the memory 13 reaches a preset voltage, the DC conversion circuit 14 is started and processes the electric energy stored in the memory 13 to output a stable direct current signal.
The load circuit 15 is connected to the DC conversion circuit 14, and the load circuit 15 is supplied with a direct current signal supplied from the DC conversion circuit 14.
Before the DC conversion circuit 14 supplies power to the load circuit 15, the NFC chip 16 supplies power to the load circuit 15, and after the DC conversion circuit 14 can output a stable direct current signal, the power supply of the load circuit 15 is switched to the DC conversion circuit 14 by the NFC chip 16.
In this embodiment, the antenna 11 receives energy in the environment and converts the energy into electric energy, so as to realize passive power supply of the power taking circuit 10. The NFC chip 16 may process the power drawn by the antenna 11 to power the load. The rectifier bridge circuit 12 is capable of rectifying the electric energy obtained by the antenna 11, the memory 13 stores the rectified electric energy, and the DC conversion circuit 14 processes the electric energy stored in the memory 13 to output a stable direct current signal, thereby providing the load circuit 15 with the stable direct current signal. The dc signal provided by the load circuit 15 is more stable and more powerful than the energy provided by the NFC chip 16, so that the load circuit 15 operates stably and can drive the load circuit 15 with higher power.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic diagram of a second structure of a circuit for power extraction according to an embodiment of the present utility model, and fig. 3 is a schematic diagram of a third structure of the circuit for power extraction according to an embodiment of the present utility model.
In some embodiments, the memory 13 includes a storage capacitor C2, one end of the storage capacitor C2 is connected to the input end of the DC conversion circuit 14, and the other end of the storage capacitor C2 is grounded. The rectifier bridge circuit 12 rectifies the sine wave ac signal generated by the antenna 11, and stores the energy of the antenna 11 in the form of a charge pump on the storage capacitor C2 at the rear end by way of boosting. The temporarily stored energy is stored in the storage capacitor C2, and the energy formula is as follows: e=1/2 cv 2, where C is the capacitance of the storage capacitor C2 and V is the voltage of the storage capacitor C2.
In some embodiments, the DC conversion circuit 14 includes a DC conversion chip 142 and an LC circuit, the LC circuit includes a first inductor L1 and a first capacitor C1, one end of the first inductor L1 is connected to the output end of the DC conversion chip 142, the other end of the first inductor L1 is connected to the load circuit 15, one end of the first capacitor C1 is connected to the other end of the first inductor L1, and the other end of the first capacitor C1 is grounded. The DC conversion chip 142 and the LC circuit cooperate to regulate voltage and convert direct current of the electric power of the memory 13. For example, when the voltage of the memory 13 is boosted to a preset voltage (e.g., 2V, 3V, or 3.3V), the DC conversion chip 142 and the LC circuit stabilize and convert the electric energy stored in the memory 13 to direct current to output a stable direct current signal. In some examples, the DC conversion chip 142 may perform voltage adjustment on the electrical signal output from the memory 13, such as may boost the electrical signal output from the memory 13. For example, the DC conversion chip 142 boosts the electric signal output from the memory 13, for example, to boost the voltage of 2V to 3.3V.
In some embodiments, the load circuit 15 includes a main control chip 152, where the main control chip 152 receives the power transmitted by the NFC chip 16 to start, and then receives the direct current signal of the DC conversion circuit 14 to supply power. The main control chip 152 first receives the power transmitted by the NFC chip 16, and starts and works, such as initializing or wirelessly communicating with an external device. The main control chip 152 may be connected to the output terminal of the DC conversion circuit 14 through a pin, and monitor the signal of the pin in real time. When the pin detects a stable direct current signal, the main control chip 152 controls the power supply thereof to be switched to the DC conversion circuit 14 by the NFC chip 16. In some examples, the main control chip 152 includes a first pin and a second pin, the first pin is connected to the NFC chip 16, and when a signal provided by the NFC chip 16 reaches a certain standard, the main control chip 152 is started. The second pin is connected to the output end of the DC conversion circuit 14, and when the DC-mounted circuit outputs a stable direct current signal, the first pin of the main control chip 152 disconnects the energy supply channel with the NFC chip 16, and the energy supply channel of the DC conversion circuit 14 and the second pin supplies power to the main control chip 152.
In some embodiments, the load circuit 15 further includes a driving circuit 154, where the driving circuit 154 is connected to the main control chip 152 and the DC conversion circuit 14, and the driving circuit 154 is controlled to be turned on or off by the main control chip 152 using a direct current signal provided by the DC conversion circuit 14. It will be appreciated that the NFC chip 16 provides less and less power and is not suitable for powering the driver circuit 154, which may otherwise easily cause an abnormality in the driver circuit 154. After the DC conversion circuit 14 can output a stable direct current signal, the driving circuit 154 can be driven by the direct current signal of the DC conversion circuit 14, so that the driving circuit 154 can operate with sufficient and stable energy. The main control chip 152 can control the start or stop of the driving circuit 154. For example, after the main control chip 152 knows that the power taking circuit 10 has stored enough energy and outputs a stable direct current signal through the DC conversion circuit 14, the DC conversion circuit 14 can be controlled to supply power to the driving circuit 154, otherwise, the main control chip 152 controls the DC conversion circuit 14 not to supply power to the driving circuit 154, for example, controls the DC conversion circuit 14 and the driving circuit 154 to be disconnected through a switch tube.
The driving circuit 154 may be set according to needs, for example, the driving circuit 154 may be a circuit to which the driving motor turns, the driving circuit 154 may be a circuit for driving the electronic paper or the ink screen to display, the driving circuit 154 may be a circuit for driving the sensor to work, and the driving circuit 154 may be other circuits, which is not limited by the driving circuit 154 in this embodiment.
In some embodiments, the driving circuit 154 may be a driving interface that outputs the energy output by the DC conversion circuit 14 to a corresponding functional device, such as a motor or electronic paper or ink screen or sensor.
In some embodiments, the master chip 152 may communicate wirelessly with external devices through the NFC chip 16, the antenna 11. The main control chip 152, the NFC chip 16 and the antenna 11 perform NFC wireless communication with external devices using NFC technology, thereby realizing wireless data communication between the power supply circuit 10 and the external devices. It should be noted that, the external device may perform NFC wireless communication with the power taking circuit 10, and meanwhile, the external device and the power taking circuit 10 may also perform NFC energy transmission.
In some examples, antenna 11 may receive 13.56M of radio frequency energy, and antenna 11 may also communicate wirelessly via the 13.56M radio frequency signal. In other examples, the operating frequency range of the antenna 11 is 15M to 20M, i.e., the antenna 11 may receive 15M to 20M rf energy, thereby providing the antenna 11 with better rf energy acquisition, and adaptively acquiring rf energy in the 15M to 20M range.
In some embodiments, the number of antennas 11 is 1, and the antennas 11 may transmit data signals and energy signals in a time-sharing manner or simultaneously. One antenna 11 can realize the function of data transmission and the function of energy transmission, reduces the space occupied by the antenna 11, and is beneficial to the miniaturization of the circuit 10. Through single antenna 11, can also realize QI wireless energy transmission on the basis of NFC energy transmission, use 13.56M radio frequency singly to provide the maximum 1W's charge power, single antenna 11 realizes two kinds of functions of communication and charging. While realizing the NFC standard function through the single antenna 11, the QI charging protocol is adopted to provide a charging function of about 1W by using the radio frequency of 15M-20M.
Referring to fig. 4, fig. 4 is a schematic diagram of a fourth configuration of a circuit for extracting power according to an embodiment of the utility model. In some embodiments, the antenna 11 includes a first antenna 112 and a second antenna 114, the first antenna 112 transmitting an energy signal and the second antenna 114 transmitting a data signal. The two independent antennas are respectively used for transmitting the energy signal and transmitting the data signal, the data signal can not be easily interfered by the energy signal, the energy signal transmission can be carried out without considering the data signal, and the rapid and high-power transmission of the energy signal is convenient.
It can be understood that in the prior art, the NFC chip supplies power to the whole circuit, the energy provided is limited, and only hundreds of mw of energy can be provided, and the energy also needs to be occupied by the main control chip and other functional circuits, so that the energy reserved for other functional modules is limited. The energy output can not be continuously and stably provided for a period of time, and when the data interaction or motion control is carried out on the general internet of things product, the energy output of a few joules for tens of seconds is required, and particularly, the effective work of electrical equipment with high power such as a motor can not be ensured.
The power extraction circuit 10 of the present embodiment may directly obtain energy from the antenna 11 (such as an NFC induction coil), and may obtain higher power rf energy and obtain higher rf conversion energy, such as about 1W, compared to the energy output of the NFC chip 16. The number of electronic components can be effectively reduced, and the energy of the high-frequency sine wave is temporarily stored on a larger storage capacitor C2, and after the threshold voltage is reached, a stable direct current signal (namely a direct current power supply) is output through the DC conversion circuit 14. The power take-off circuit 10 can meet the instantaneous hundreds of mA current requirements of functional devices, such as motor start-up and the like.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the utility model. The embodiment of the present utility model further provides an electronic device 100, where the electronic device 100 includes a power taking circuit 10, and the power taking circuit 10 may be the power taking circuit in any one of the foregoing embodiments, and specific results of the power taking circuit 10 are not described herein.
Referring to fig. 6, fig. 6 is another schematic structural diagram of an electronic device according to an embodiment of the utility model. In some examples, electronic device 100 may be a passive NFC lock that includes a lock body and power take-off circuit 10, where power take-off circuit 10 may obtain radio frequency energy from the environment and then convert it to a stable dc signal, and when power take-off circuit 10 stores sufficient energy, power take-off circuit 10 uses the dc signal to drive a motor to control the lock body to unlock or lock.
In some examples, the electronic device may be a passive NFC display device that includes a display that may be a low-power electronic paper or ink screen, and a power harvesting circuit that may capture radio frequency energy from the environment and then convert it to a stable dc signal, and when the energy stored by the power harvesting circuit is sufficient, the power harvesting circuit uses the dc signal to control the display to update the display content.
In some examples, the electronic device may be a passive NFC detection device, where the passive NFC detection device includes a sensor and a power harvesting circuit, where the sensor may be at least one of a low-power temperature sensor, a humidity sensor, and a photoelectric sensor, where the power harvesting circuit may obtain radio frequency energy from the environment and then convert the radio frequency energy to a stable direct current signal, and where the power harvesting circuit stores sufficient energy, the power harvesting circuit uses the direct current signal to drive the sensor to control the sensor to collect a corresponding signal, such as an ambient temperature, an ambient humidity, an ambient brightness, and the like.
The embodiments, the implementation modes and the related technical features of the utility model can be mutually combined and replaced under the condition of no conflict.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1. A power extraction circuit, comprising:
an antenna for receiving energy in an environment and converting the energy into electrical energy;
the rectifier bridge circuit is connected with the antenna and used for rectifying the electric energy;
the storage is connected with the rectifier bridge circuit and used for storing rectified electric energy;
the DC conversion circuit is used for connecting the memories, and when the voltage of the memories reaches a preset voltage, the DC conversion circuit is started and processes the electric energy stored in the memories so as to output a stable direct current signal;
a load circuit connected to the DC conversion circuit, the load circuit being powered by the direct current signal provided by the DC conversion circuit;
and the NFC chip is connected with the antenna and outputs the processed electric energy to supply power to the load circuit before the DC conversion circuit is started.
2. The power extraction circuit of claim 1, wherein the DC conversion circuit comprises:
a DC conversion chip;
the LC circuit comprises a first inductor and a first capacitor, one end of the first inductor is connected with the output end of the DC conversion chip, the other end of the first inductor is connected with the load circuit, one end of the first capacitor is connected with the other end of the first inductor, and the other end of the first capacitor is grounded.
3. The power extraction circuit of claim 1, wherein the load circuit comprises:
and the main control chip is firstly used for receiving the electric energy transmitted by the NFC chip and then receiving the direct current signal of the DC conversion circuit to supply power.
4. The power extraction circuit of claim 3, wherein the load circuit further comprises:
the driving circuit is connected with the main control chip and the DC conversion circuit, and the driving circuit is started or closed under the control of the main control chip by utilizing a direct current signal provided by the DC conversion circuit.
5. The power take-off circuit of claim 3, wherein the main control chip communicates wirelessly with an external device through the NFC chip and the antenna.
6. The power extraction circuit of claim 1, wherein,
the operating frequency range of the antenna is 15M to 20M.
7. The power extraction circuit of claim 1, wherein the antenna transmits the data signal and the energy signal at the same time or time.
8. The power extraction circuit of claim 1, wherein the antenna comprises a first antenna and a second antenna, the first antenna transmitting an energy signal and the second antenna transmitting a data signal.
9. The power extraction circuit of claim 1, wherein the memory comprises a storage capacitor, one end of the storage capacitor is connected with the input end of the DC conversion circuit, and the other end of the storage capacitor is grounded.
10. An electronic device, comprising:
a power extraction circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321674830.3U CN220022416U (en) | 2023-06-28 | 2023-06-28 | Circuit and electronic equipment get |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321674830.3U CN220022416U (en) | 2023-06-28 | 2023-06-28 | Circuit and electronic equipment get |
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| CN220022416U true CN220022416U (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321674830.3U Active CN220022416U (en) | 2023-06-28 | 2023-06-28 | Circuit and electronic equipment get |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543851A (en) * | 2024-01-09 | 2024-02-09 | 深圳市每开创新科技有限公司 | Multi-path stored passive device and control method thereof |
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2023
- 2023-06-28 CN CN202321674830.3U patent/CN220022416U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117543851A (en) * | 2024-01-09 | 2024-02-09 | 深圳市每开创新科技有限公司 | Multi-path stored passive device and control method thereof |
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