CN213211083U - Electronic wallet circuit and electronic wallet - Google Patents
Electronic wallet circuit and electronic wallet Download PDFInfo
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- CN213211083U CN213211083U CN202021952740.2U CN202021952740U CN213211083U CN 213211083 U CN213211083 U CN 213211083U CN 202021952740 U CN202021952740 U CN 202021952740U CN 213211083 U CN213211083 U CN 213211083U
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Abstract
The utility model is suitable for an electronic wallet technical field especially relates to an electronic wallet circuit and electronic wallet, wherein, the electronic wallet circuit includes the NFC antenna, the electronic wallet chip, a battery, on-off circuit, keying circuit, master control circuit and display screen, the electronic wallet chip feeds back transaction data to master control circuit after trading with card reading terminal through the NFC antenna, master control circuit is by battery powered, and trade the data display through the display screen, need not to show through card reading terminal, the security improves, and is easy and simple to handle, user's experience sense has been improved.
Description
Technical Field
The utility model belongs to the technical field of electronic wallet, especially, relate to an electronic wallet circuit and electronic wallet.
Background
The existing NFC electronic wallet generally has no peripheral devices such as a display screen, needs to take electricity from a card reading terminal through an NFC antenna and communicate with the card reading terminal, and then displays information on the card reading terminal, such as acquiring the balance of the wallet, so that the safety is low, the operation is complex, and the user experience is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electronic wallet circuit aims at solving traditional electronic wallet and leads to the problem that the security is low and the operation is complicated through reading card terminal display information.
A first aspect of an embodiment of the present invention provides an electronic wallet circuit, which includes an NFC antenna, an electronic wallet chip, a battery, a switching circuit, a key circuit, a main control circuit, and a display screen;
the power on/off circuit is electrically connected with the battery, the main control circuit and the key circuit respectively, the electronic wallet chip is electrically connected with the NFC antenna and the main control circuit respectively, and the main control circuit is also electrically connected with the display screen;
the key circuit is used for outputting a startup and shutdown signal to the startup and shutdown circuit according to the triggering operation of a user;
the battery is used for outputting a first direct current power supply to the switching circuit;
the switching circuit is used for switching on and transmitting the first direct current power supply to the main control circuit according to the switching signal, or switching off and stopping to output the first direct current power supply to the main control circuit according to the switching signal;
the electronic wallet chip is used for being connected with a card reading terminal through the NFC antenna and being powered on for data interaction, and outputting transaction data to the main control circuit;
the main control circuit is used for starting when receiving the first direct current power supply and controlling the display screen to display the transaction data.
In one embodiment, the electronic wallet circuitry further comprises a first switching circuit and a power conversion circuit;
the power input end of the first switch circuit is connected with the power end of the battery, the power input end of the power conversion circuit is connected with the NFC antenna, the power output end of the first switch circuit, the power output end of the power conversion circuit and the power input end of the switch circuit are interconnected, and the control end of the power conversion circuit is connected with the controlled end of the first switch circuit;
the power conversion circuit is used for:
receiving an alternating current power supply output by the NFC antenna and converting the alternating current power supply into a second direct current power supply;
when the voltage of the second direct current power supply is larger than the voltage output by the battery, the first switching circuit is controlled to be switched off, and the second direct current power supply is output to the switching circuit;
and when the voltage of the second direct current power supply is smaller than the voltage output by the battery, the first switch circuit is controlled to be switched on, and the second direct current power supply is switched off and output to the switch circuit.
In one embodiment, the power conversion circuit is further connected with the master control circuit;
the power conversion circuit is further used for sending an NFC power-on signal to the main control circuit when the electronic wallet chip is connected with the card reading terminal through the NFC antenna.
In one embodiment, the electronic wallet circuitry further comprises a second switching circuit;
the power supply input end of the second switching circuit is connected with the power supply output end of the on-off circuit, and the power supply output end of the second switching circuit is connected with the power supply end of the electronic wallet chip;
the master control circuit is further configured to control the second switch circuit to be turned on when the NFC power-on signal is received, and control the second switch circuit to be turned off when the NFC power-on signal is not received.
In one embodiment, the electronic wallet circuit further comprises a bank card chip and a radio frequency switch;
the radio frequency switch is electrically connected with the bank card chip, the NFC antenna and the electronic wallet chip respectively;
the main control circuit is used for outputting a first control signal to the radio frequency switch when receiving a power-on signal of the battery, and outputting a second control signal to the radio frequency switch when not receiving the power-on signal of the battery;
the radio frequency switch is used for communicating the electronic wallet chip and the NFC antenna when receiving the first control signal so as to enable the electronic wallet chip to interact with a card reading terminal through the NFC antenna;
and communicating the bank card chip and the NFC antenna when the second control signal is received, so that the bank card chip is in signal interaction with a card reading terminal through the NFC antenna.
In one embodiment, the electronic wallet circuit further comprises a key switch, and the key switch is electrically connected with the main control circuit;
the main control circuit is also used for controlling the display screen to switch the display interface according to the key trigger signal output by the key switch.
In one embodiment, the power conversion circuit comprises a rectifying voltage stabilizing circuit and an LDO voltage stabilizing circuit;
the power input end of the rectification voltage stabilizing circuit is connected with the NFC antenna, the power output end of the rectification voltage stabilizing circuit is connected with the power input end of the LDO voltage stabilizing circuit, the power output end of the LDO voltage stabilizing circuit is connected with the power input end of the switching on/off circuit, and the LDO voltage stabilizing circuit is also electrically connected with the first switching circuit and the main control circuit respectively;
the rectification voltage stabilizing circuit is used for rectifying and converting the alternating current power supply output by the NFC antenna and outputting a first direct current voltage to the LDO voltage stabilizing circuit;
the LDO voltage stabilizing circuit is used for converting the first direct current voltage into a second direct current voltage and outputting the second direct current voltage to the main control circuit, the switch circuit and the first switch circuit;
the first switch circuit is a triode.
In one embodiment, the rectifying and voltage stabilizing circuit comprises a rectifying bridge and a voltage stabilizing diode, wherein the voltage stabilizing diode is connected in an anti-parallel mode at the output end of the rectifying bridge.
In one embodiment, the startup and shutdown circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first diode, a first electronic switch tube and a second electronic switch tube;
the first end of the first capacitor, the signal end of the key circuit, the first end of the first resistor and the cathode of the first diode are interconnected, the second end of the first capacitor, the first end of the second resistor, the second end of the first resistor, the grid of the first electronic switch tube and the drain of the second electronic switch tube are interconnected, the source of the first electronic switch tube and the second end of the second resistor are connected in common to form the power input end of the switching circuit, the drain of the first electronic switch tube is the power input end of the switching circuit, the grid of the second electronic switch tube, the first end of the third resistor and the anode of the first diode are respectively connected with the signal end of the main control circuit, and the second end of the third resistor is connected with the source of the second electronic switch tube.
A second aspect of embodiments of the present invention provides an electronic wallet comprising an electronic wallet circuit as described above.
The embodiment of the utility model provides a form electronic wallet circuit through adopting NFC antenna, electronic wallet chip, battery, switching on and off circuit, keying circuit, master control circuit and display screen, electronic wallet chip feeds back transaction data to master control circuit after trading with card reading terminal through the NFC antenna, and master control circuit is by battery powered to trade data display through the display screen, need not to show through card reading terminal, and the security improves, and is easy and simple to handle, has improved user's experience and has felt.
Drawings
Fig. 1 is a schematic diagram of a first structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a second structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a third structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a fourth structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a fifth structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a sixth configuration of an electronic wallet circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a seventh structure of an electronic wallet circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a rectifying and voltage stabilizing circuit provided in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a switching circuit provided in an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Furthermore, the terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
A first aspect of an embodiment of the present invention provides an electronic wallet circuit.
As shown in fig. 1, fig. 1 is a first schematic structural diagram of an electronic wallet circuit according to an embodiment of the present invention, in this embodiment, the electronic wallet circuit includes an NFC antenna 10, an electronic wallet chip 20, a battery 30, a power on/off circuit 40, a key circuit 50, a main control circuit 60, and a display screen 70;
the switch circuit 40 is electrically connected with the battery 30, the main control circuit 60 and the key circuit 50, the electronic wallet chip 20 is electrically connected with the NFC antenna 10 and the main control circuit 60, and the main control circuit 60 is also electrically connected with the display screen 70;
the key circuit 50 is used for outputting a power-on/off signal to the power-on/off circuit 40 according to the triggering operation of a user;
a battery 30 for outputting a first direct current power supply to the switching circuit 40;
the switching circuit 40 is configured to turn on and transmit the first dc power to the main control circuit 60 according to the on/off signal, or turn off and stop outputting the first dc power to the main control circuit 60 according to the on/off signal;
the electronic wallet chip 20 is used for being connected with a card reading terminal through the NFC antenna 10 to be powered on and perform data interaction, and outputting transaction data to the main control circuit 60;
the main control circuit 60 is configured to start when receiving the first dc power, and control the display screen 70 to display the transaction data.
In this embodiment, the NFC antenna 10 wirelessly communicates with a card reading terminal, when the card reading terminal approaches, the card reading terminal communicates with the NFC antenna 10 and provides a working power source for the electronic wallet chip 20 to power on the electronic wallet chip 20, when the electronic wallet chip 20 is powered on to perform data interaction with the card reading terminal, such as financial transaction, data query, and the like, the electronic wallet chip 20 feeds back transaction data to the main control circuit 60 after the transaction is completed, the battery 30 provides a working power source for the main control circuit 60 through the on/off circuit 40, when the on/off circuit 40 is turned on under the control of the key circuit 50, the working power source is output to the main control circuit 60, the main control circuit 60 receives the transaction data fed back by the electronic wallet chip 20 and controls the display screen 70 to display data, when the NFC antenna 10 does not approach the card reading terminal, a user can still control the main control circuit 60 and the display screen 70 to start through the key, therefore, the data in the electronic wallet chip 20 can be obtained, the data in the electronic wallet chip 20 does not need to be obtained through a card reading terminal, and the convenience of data acquisition and the experience of a user are improved.
The main control circuit 60 may be a processor such as an MCU or a CPU, the key circuit 50 may be a touch key, a mechanical key, etc., the display screen 70 may be a digital display screen 70, or a code breaking electronic paper, the power on/off circuit 40 may be a switch device or a switch combination circuit with a controlled function, and the battery 30 may be a lithium battery 30, such as a button battery 30, and the specific structure is not limited.
As shown in fig. 2, in one embodiment, the electronic wallet circuit further includes a key switch 130, and the key switch 130 is electrically connected to the main control circuit 60;
the main control circuit 60 is further configured to control the display screen 70 to switch the display interface according to the key trigger signal output by the key switch 130.
The key switch 130 may be combined with the display screen 70 to form a touch screen, and the specific structure is not limited.
The embodiment of the utility model provides a through adopting NFC antenna 10, electronic wallet chip 20, battery 30, on/off circuit 40, keying circuit 50, electronic wallet circuit is constituteed to master control circuit 60 and display screen 70, electronic wallet chip 20 feeds back transaction data to master control circuit 60 after trading with card reading terminal through NFC antenna 10, master control circuit 60 is supplied power by battery 30, and trade data display through display screen 70, need not to show through card reading terminal, the security improves, and is easy and simple to handle, user's experience sense has been improved.
As shown in fig. 3, in one embodiment, the electronic wallet circuitry further includes a first switching circuit 80 and a power conversion circuit 90;
a power input end of the first switch circuit 80 is connected with a power end of the battery 30, a power input end of the power conversion circuit 90 is connected with the NFC antenna 10, a power output end of the first switch circuit 80, a power output end of the power conversion circuit 90 and a power input end of the switch circuit 40 are interconnected, and a control end of the power conversion circuit 90 is connected with a controlled end of the first switch circuit 80;
a power conversion circuit 90 for:
receiving an alternating current power supply output by the NFC antenna 10 and converting the alternating current power supply into a second direct current power supply;
when the voltage of the second dc power is greater than the voltage output by the battery 30, the first switching circuit 80 is controlled to be turned off, and the second dc power is output to the power on/off circuit 40;
when the voltage of the second dc power is lower than the voltage output from the battery 30, the first switch circuit 80 is controlled to be turned on, and the second dc power is turned off to be output to the power on/off circuit 40.
In this embodiment, the power conversion circuit 90 correspondingly operates according to the field intensity between the NFC antenna 10 and the card reading terminal, when the field intensity of the NFC antenna 10 is large and the power provided by the NFC antenna 10 is sufficient to ensure that each module operates, that is, when the voltage of the second dc power supply output by the power conversion circuit 90 is greater than the voltage output by the battery 30, in order to save the electric quantity of the battery 30, the power conversion circuit 90 outputs a control signal to control the first switching circuit 80 to turn off, so as to cut off the output of the battery 30, the power conversion circuit 90 converts the second dc power supply to the switching circuit 40, and when the switching circuit 40 is triggered and turned on by the key circuit 50, the first dc power supply is output to the main control circuit 60.
When the field intensity of the NFC antenna 10 is weak, that is, the voltage of the second dc power output by the power conversion circuit 90 is smaller than the voltage output by the battery 30, in order to ensure that each module operates, the power conversion circuit 90 outputs a control signal to control the first switch circuit 80 to be turned on, and the battery 30 provides an operating power for each module.
The power conversion circuit 90 may be a rectifying and voltage-reducing circuit, and the specific structure is not limited.
As shown in fig. 4, in one embodiment, the power conversion circuit 90 is further connected to the main control circuit 60;
the power conversion circuit 90 is further configured to send an NFC power-on signal to the main control circuit 60 when the electronic wallet chip 20 is connected to the card reading terminal through the NFC antenna 10, so as to inform the connection state of the NFC antenna 10.
As shown in fig. 5, in one embodiment, the electronic wallet circuit further includes a second switching circuit 100;
the power input end of the second switch circuit 100 is connected with the power output end of the switch circuit 40, and the power output end of the second switch circuit 100 is connected with the power end of the electronic wallet chip 20;
the master control circuit 60 is further configured to control the second switch circuit 100 to be turned on when the NFC power-on signal is received, and control the second switch circuit 100 to be turned off when the NFC power-on signal is not received.
In this embodiment, when the electronic wallet chip 20 is not connected to the card reading terminal through the NFC antenna 10, the voltage of the second dc power supply is zero and is less than the voltage of the battery, the battery 30 outputs the first dc power supply to the main control circuit 60 through the first switch circuit 80 and the switch circuit 40, the main control circuit 60 is powered on to operate, the power conversion circuit 90 does not send an NFC power-on signal to the main control circuit 60 at this time, the main control circuit 60 is powered by the battery 30, and simultaneously, the second switch circuit 100 is controlled to be turned off, so that the power output of the battery 30 is reduced when the electronic wallet circuit is not in communication with the card reading terminal, the energy consumption of the battery 30 is reduced, and at this time, the display screen 70 can be controlled to switch the display interface according to the.
When the electronic wallet chip 20 is connected to the card reading terminal through the NFC antenna 10, the power conversion circuit 90 controls the first switch circuit 80 to be turned on or off according to the voltage of the second dc power supply and the voltage of the battery 30, so that the power conversion circuit 90 or the battery 30 outputs the dc power to the power on/off circuit 40, and the power on/off circuit 40 provides a working power supply for the electronic wallet chip 20, so as to ensure that the electronic wallet chip 20 can stably receive the working power supply to work when the NFC antenna 10 is connected to the card reading terminal.
As shown in fig. 6, in one embodiment, the electronic wallet circuitry further includes a bank card chip 110 and a radio frequency switch 120;
the radio frequency switch 120 is electrically connected with the bank card chip 110, the NFC antenna 10 and the electronic wallet chip 20 respectively;
the main control circuit 60 is configured to output a first control signal to the rf switch 120 when receiving a power-on signal of the battery 30, and output a second control signal to the rf switch 120 when not receiving the power-on signal of the battery 30;
the radio frequency switch 120 is used for communicating the electronic wallet chip 20 and the NFC antenna 10 when receiving the first control signal, so that the electronic wallet chip 20 interacts with the card reading terminal through the NFC antenna 10;
and when receiving the second control signal, communicating the bank card chip 110 and the NFC antenna 10, so that the bank card chip 110 interacts with the card reading terminal through the NFC antenna 10.
In this embodiment, in the power-off state, that is, the power-on/off circuit 40 does not receive a power-on signal, the battery 30 does not output a first direct current power source, the main control circuit 60 does not operate, the radio frequency switch 120 is connected to the bank card chip 110 by default through the radio frequency switch 120, when the card reader is wirelessly connected to the card reader, the bank card chip 110 obtains energy from the antenna to power on and enters a working state for data interaction, when the key circuit 50 is powered on, that is, after the battery 30 is powered on and the main control circuit 60 receives an NFC power-on signal, a control signal is sent to the radio frequency switch 120, the radio frequency switch 120 is connected in a switching manner, the NFC antenna 10 is connected to the electronic wallet chip 20, the electronic wallet chip 20 obtains energy from the antenna to power on and enters a working state for data interaction, so that the bank card chip 110.
As shown in FIG. 7, in one embodiment, the power conversion circuit 90 includes a rectifying regulator circuit 91 and an LDO regulator circuit 92;
the power input end of the rectifying and voltage stabilizing circuit 91 is connected with the NFC antenna 10, the power output end of the rectifying and voltage stabilizing circuit 91 is connected with the power input end of the LDO voltage stabilizing circuit 92, the power output end of the LDO voltage stabilizing circuit 92 is connected with the power input end of the switching circuit 40, and the LDO voltage stabilizing circuit 92 is electrically connected with the first switching circuit 80 and the main control circuit 60 respectively;
the rectifying and voltage stabilizing circuit 91 is configured to perform rectifying conversion on the ac power output by the NFC antenna 10 and output a first dc voltage to the LDO voltage stabilizing circuit 92;
the LDO voltage stabilizing circuit 92 is configured to convert the first dc voltage into a second dc voltage, and output the second dc voltage to the main control circuit 60, the switch circuit 40, and the first switch circuit 80;
the first switching circuit 100 is a transistor.
In this embodiment, the rectifying and voltage stabilizing circuit 91 is configured to perform rectification and voltage reduction conversion, and the LDO voltage stabilizing circuit 92 is configured to further stabilize voltage and output a second operating voltage that satisfies the main control circuit 60 and the electronic wallet chip 20, and at the same time, the LDO voltage stabilizing circuit 92 controls the first switch circuit 80 to turn on or off according to the magnitude of the input dc power, and feeds back a corresponding NFC power-on signal to the main control circuit 60, where the first switch circuit 80 may be a switch device with a controlled function, and in one embodiment, the first switch circuit 80 is a triode.
As shown in fig. 8, in one embodiment, the rectifying regulator circuit 91 includes a rectifier bridge and a zener diode D5, the zener diode D5 is connected in anti-parallel with the output of the rectifier bridge, the rectifier bridge is used for ac/dc conversion, and the zener diode D5 is used for voltage regulation.
As shown in fig. 9, in one embodiment, the power on/off circuit 40 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first diode D6, a first electronic switch Q1, and a second electronic switch Q2;
the first end of the first capacitor C1, the signal end of the key circuit 50, the first end of the first resistor R1 and the cathode of the first diode D6 are interconnected, the second end of the first capacitor C1, the first end of the second resistor R2, the second end of the first resistor R1, the gate of the first electronic switch Q1 and the drain of the second electronic switch Q2 are interconnected, the source of the first electronic switch Q1 and the second end of the second resistor R2 are connected in common to form a power input end of the switch circuit 40, the drain of the first electronic switch Q1 is a power output end of the switch circuit 40, the gate of the second electronic switch Q2, the first end of the third resistor R3 and the anode of the first diode D6 are respectively connected to the signal end of the main control circuit 60, and the second end of the third resistor R3 is connected to the source of the second electronic switch Q2.
In this embodiment, the key circuit 50 is a key K1, the CTR1, CTR2, CTR3 and VOUT are connected to the main control circuit 60, when the key K1 is pressed during power on, the gate of the first electronic switch Q1 is turned on at a low level, the input dc power supplies power to the main control circuit 60, the CTR3 signal connected to the main control circuit 60 is set to a low level, the main control circuit 60 receives the low level signal of the CTR3, outputs the CTR1 to a high level, outputs the CTR2 to a low level, turns on the second electronic switch Q2, and the CTR2 lowers the drain of the first electronic switch Q1, keeps the first electronic switch Q1 turned on normally, and the input dc power supplies power continuously.
When the key is pressed again during power off, the CTR3 signal is set to low level, the main control circuit 60 turns off the first electronic switch Q1 through the output CTR1 as low level, and the dc power supply stops supplying power.
The utility model discloses still provide an electronic wallet, this electronic wallet includes the electronic wallet circuit, and the concrete structure of this electronic wallet circuit refers to above-mentioned embodiment, because this electronic wallet has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An electronic wallet circuit is characterized by comprising an NFC antenna, an electronic wallet chip, a battery, a switching circuit, a key circuit, a main control circuit and a display screen;
the power on/off circuit is electrically connected with the battery, the main control circuit and the key circuit respectively, the electronic wallet chip is electrically connected with the NFC antenna and the main control circuit respectively, and the main control circuit is also electrically connected with the display screen;
the key circuit is used for outputting a startup and shutdown signal to the startup and shutdown circuit according to the triggering operation of a user;
the battery is used for outputting a first direct current power supply to the switching circuit;
the switching circuit is used for switching on and transmitting the first direct current power supply to the main control circuit according to the switching signal, or switching off and stopping to output the first direct current power supply to the main control circuit according to the switching signal;
the electronic wallet chip is used for being connected with a card reading terminal through the NFC antenna and being powered on for data interaction, and outputting transaction data to the main control circuit;
the main control circuit is used for starting when receiving the first direct current power supply and controlling the display screen to display the transaction data.
2. The electronic wallet circuit of claim 1, further comprising a first switching circuit and a power conversion circuit;
the power input end of the first switch circuit is connected with the power end of the battery, the power input end of the power conversion circuit is connected with the NFC antenna, the power output end of the first switch circuit, the power output end of the power conversion circuit and the power input end of the switch circuit are interconnected, and the control end of the power conversion circuit is connected with the controlled end of the first switch circuit;
the power conversion circuit is used for:
receiving an alternating current power supply output by the NFC antenna and converting the alternating current power supply into a second direct current power supply;
when the voltage of the second direct current power supply is larger than the voltage output by the battery, the first switching circuit is controlled to be switched off, and the second direct current power supply is output to the switching circuit;
and when the voltage of the second direct current power supply is smaller than the voltage output by the battery, the first switch circuit is controlled to be switched on, and the second direct current power supply is switched off and output to the switch circuit.
3. The electronic wallet circuit of claim 2, wherein the power conversion circuit is further connected to the master control circuit;
the power conversion circuit is further used for sending an NFC power-on signal to the main control circuit when the electronic wallet chip is connected with the card reading terminal through the NFC antenna.
4. The electronic wallet circuit of claim 3, further comprising a second switch circuit;
the power supply input end of the second switching circuit is connected with the power supply output end of the on-off circuit, and the power supply output end of the second switching circuit is connected with the power supply end of the electronic wallet chip;
the master control circuit is further configured to control the second switch circuit to be turned on when the NFC power-on signal is received, and control the second switch circuit to be turned off when the NFC power-on signal is not received.
5. The electronic wallet circuit of claim 4, further comprising a bank card chip and a radio frequency switch;
the radio frequency switch is electrically connected with the bank card chip, the NFC antenna and the electronic wallet chip respectively;
the main control circuit is used for outputting a first control signal to the radio frequency switch when receiving a power-on signal of the battery, and outputting a second control signal to the radio frequency switch when not receiving the power-on signal of the battery;
the radio frequency switch is used for communicating the electronic wallet chip and the NFC antenna when receiving the first control signal so as to enable the electronic wallet chip to interact with a card reading terminal through the NFC antenna;
and communicating the bank card chip and the NFC antenna when the second control signal is received, so that the bank card chip is in signal interaction with a card reading terminal through the NFC antenna.
6. The electronic wallet circuit of claim 1, further comprising a key switch, the key switch being electrically connected to the master control circuit;
the main control circuit is also used for controlling the display screen to switch the display interface according to the key trigger signal output by the key switch.
7. The electronic wallet circuit of claim 4, wherein the power conversion circuit comprises a rectifying regulator circuit and an LDO regulator circuit;
the power input end of the rectification voltage stabilizing circuit is connected with the NFC antenna, the power output end of the rectification voltage stabilizing circuit is connected with the power input end of the LDO voltage stabilizing circuit, the power output end of the LDO voltage stabilizing circuit is connected with the power input end of the switching on/off circuit, and the LDO voltage stabilizing circuit is also electrically connected with the first switching circuit and the main control circuit respectively;
the rectification voltage stabilizing circuit is used for rectifying and converting the alternating current power supply output by the NFC antenna and outputting a first direct current voltage to the LDO voltage stabilizing circuit;
the LDO voltage stabilizing circuit is used for converting the first direct current voltage into a second direct current voltage and outputting the second direct current voltage to the main control circuit, the switch circuit and the first switch circuit;
the first switch circuit is a triode.
8. The electronic wallet circuit of claim 7, wherein the rectifying and voltage stabilizing circuit comprises a rectifying bridge and a zener diode connected in anti-parallel with an output of the rectifying bridge.
9. The electronic wallet circuit of claim 1, wherein the power on/off circuit comprises a first resistor, a second resistor, a third resistor, a first capacitor, a first diode, a first electronic switch and a second electronic switch;
the first end of the first capacitor, the signal end of the key circuit, the first end of the first resistor and the cathode of the first diode are interconnected, the second end of the first capacitor, the first end of the second resistor, the second end of the first resistor, the grid of the first electronic switch tube and the drain of the second electronic switch tube are interconnected, the source of the first electronic switch tube and the second end of the second resistor are connected in common to form the power input end of the switching circuit, the drain of the first electronic switch tube is the power output end of the switching circuit, the grid of the second electronic switch tube, the first end of the third resistor and the anode of the first diode are respectively connected with the signal end of the main control circuit, and the second end of the third resistor is connected with the source of the second electronic switch tube.
10. An electronic wallet comprising an electronic wallet circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021952740.2U CN213211083U (en) | 2020-09-08 | 2020-09-08 | Electronic wallet circuit and electronic wallet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021952740.2U CN213211083U (en) | 2020-09-08 | 2020-09-08 | Electronic wallet circuit and electronic wallet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213211083U true CN213211083U (en) | 2021-05-14 |
Family
ID=75845015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021952740.2U Active CN213211083U (en) | 2020-09-08 | 2020-09-08 | Electronic wallet circuit and electronic wallet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213211083U (en) |
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2020
- 2020-09-08 CN CN202021952740.2U patent/CN213211083U/en active Active
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