CN204515786U - A kind of radio-frequency antenna plate and card reading circuit - Google Patents
A kind of radio-frequency antenna plate and card reading circuit Download PDFInfo
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- CN204515786U CN204515786U CN201520215518.7U CN201520215518U CN204515786U CN 204515786 U CN204515786 U CN 204515786U CN 201520215518 U CN201520215518 U CN 201520215518U CN 204515786 U CN204515786 U CN 204515786U
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- card reader
- reader chip
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Abstract
The utility model discloses a kind of radio-frequency antenna plate, comprise circuit board, circuit board is provided with Wound-rotor type antenna and radio frequency Card Reader chip, Wound-rotor type antenna is connected with radio frequency Card Reader chip, radio frequency Card Reader chip is provided with Serial Peripheral Interface (SPI), Wound-rotor type antenna is for obtaining the radiofrequency signal of radiofrequency signal or the transmission of received RF Card Reader chip, radio frequency Card Reader chip is used for radiofrequency signal being converted to low speed digital signal or low speed digital signal being converted to radiofrequency signal, and Serial Peripheral Interface (SPI) is for transmitting low speed digital signal.The invention also discloses a kind of card reading circuit.Low speed digital signal is transmitted between radio frequency Card Reader chip of the present utility model and master control board, this low speed digital signal has the characteristic that signal is strong, frequency is low, so the impact of resistance on low speed digital signal of the connection winding displacement between radio-frequency antenna plate and master control board and the Connection Block that connects winding displacement two ends is little.Therefore, the coherence request of the production material connecting winding displacement and Connection Block and quality etc. is reduced.
Description
Technical field
The utility model relates to signal processing technology field, particularly relates to a kind of radio-frequency antenna plate and card reading circuit.
Background technology
Along with the fast development of automatic identification technology, the application of radio RF recognition technology also becomes more and more extensive, all plays an important role in contact-free integrated circuit (Integrated Circuit, IC) card etc.
What transmit between existing radio-frequency antenna plate and master control board is radiofrequency signal.But the impact of resistance radio frequency signal of radio-frequency antenna plate and the connection winding displacement between master control board and the Connection Block that connects winding displacement two ends is larger.In order to ensure the consistance of the performance of different radio-frequency antenna plates, need to reduce the resistance difference connecting winding displacement and Connection Block, so, to connecting winding displacement, the production material of Connection Block and quality etc., higher coherence request is proposed.
In sum, how overcoming the defect high to the coherence request of the production material and quality etc. of the Connection Block on the connection winding displacement be connected with existing radio-frequency antenna plate and radio-frequency antenna plate, is current technical matters urgently to be resolved hurrily.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of radio-frequency antenna plate, solves the technical matters high to the coherence request of the production material and quality etc. of the Connection Block on the connection winding displacement be connected with existing radio-frequency antenna plate and radio-frequency antenna plate.
For achieving the above object, the utility model provides a kind of radio-frequency antenna plate, this radio-frequency antenna plate comprises a circuit board, described circuit board is provided with Wound-rotor type antenna and radio frequency Card Reader chip, described Wound-rotor type antenna is connected with described radio frequency Card Reader chip, and described radio frequency Card Reader chip is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication; Described Wound-rotor type antenna for obtain radiofrequency signal or receive described radio frequency Card Reader chip send radiofrequency signal, described Wound-rotor type antenna is used for described radio frequency Card Reader chip emission radiofrequency signal, described radio frequency Card Reader chip is used for described radiofrequency signal to be converted to digital signal, and described Serial Peripheral Interface (SPI) is for sending described digital signal to described master control board.
Preferably, described circuit board is also provided with radio frequency crystal oscillating circuit, and described radio frequency crystal oscillating circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency crystal oscillating circuit is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip, control described Wound-rotor type antenna and carry out read-write operation.
Preferably, described radio frequency crystal oscillating circuit comprises crystal resonator, the first electric capacity and the second electric capacity, one end of described crystal resonator is connected with the OSCIN pin of one end of described first electric capacity, described radio frequency Card Reader chip, the other end of described crystal resonator is connected with the OSCOUT pin of one end of described second electric capacity, described radio frequency Card Reader chip, the other end of described first electric capacity and the other end of described second electric capacity ground connection respectively, the AVSS pin ground connection of described radio frequency Card Reader chip.
Preferably, described circuit board is also provided with radio frequency filter circuit, described radio frequency filter circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency filter circuit is used for the radiofrequency signal transmitted between radio frequency Card Reader chip and Wound-rotor type antenna to carry out filtering process.
Preferably, described Wound-rotor type antenna comprises first end, second end and intermediate ends, described radio frequency filter circuit comprises the 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity, tenth electric capacity, first inductance, second inductance, described first end is connected with the TX2 pin of described first inductance with described radio frequency Card Reader chip through described 3rd electric capacity, described second end is connected with the TX1 pin of described second inductance with described radio frequency Card Reader chip through described 4th electric capacity, described intermediate ends ground connection, and be connected with the TVSS pin of described radio frequency Card Reader chip, described 5th electric capacity and described 6th Capacitance parallel connection, and one end after parallel connection respectively with described 3rd electric capacity, described first end connects, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, described 7th electric capacity and described 8th Capacitance parallel connection, and one end after parallel connection respectively with described 4th electric capacity, described second end connect, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, one end of described 9th electric capacity respectively with described 3rd electric capacity, described first inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects, one end of described tenth electric capacity respectively with described 4th electric capacity, described second inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects.
In addition, for achieving the above object, the utility model additionally provides a kind of card reading circuit, described card reading circuit comprises master control board and radio-frequency antenna plate, described radio-frequency antenna plate comprises a circuit board, described circuit board is provided with Wound-rotor type antenna and radio frequency Card Reader chip, and described Wound-rotor type antenna is connected with described radio frequency Card Reader chip, and described radio frequency Card Reader chip is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication; Be provided with between described master control board with described radio-frequency antenna plate and be connected winding displacement, one end of described connection winding displacement is connected with described Serial Peripheral Interface (SPI), the other end of described connection winding displacement is connected with described master control board, described Wound-rotor type antenna is used for described radio frequency Card Reader chip emission radiofrequency signal, described radio frequency Card Reader chip is used for described radiofrequency signal to be converted to digital signal, described Serial Peripheral Interface (SPI) is for sending described digital signal to described master control board, and described master control board is used for processing described digital signal.
Preferably, described circuit board is also provided with radio frequency crystal oscillating circuit, and described radio frequency crystal oscillating circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency crystal oscillating circuit is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip, control described Wound-rotor type antenna and carry out read-write operation.
Preferably, described radio frequency crystal oscillating circuit comprises crystal resonator, the first electric capacity and the second electric capacity, one end of described crystal resonator is connected with the OSCIN pin of one end of described first electric capacity, described radio frequency Card Reader chip, the other end of described crystal resonator is connected with the OSCOUT pin of one end of described second electric capacity, described radio frequency Card Reader chip, the other end of described first electric capacity and the other end of described second electric capacity ground connection respectively, the AVSS pin ground connection of described radio frequency Card Reader chip.
Preferably, described circuit board is also provided with radio frequency filter circuit, described radio frequency filter circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency filter circuit is used for the radiofrequency signal transmitted between radio frequency Card Reader chip and Wound-rotor type antenna to carry out filtering process.
Preferably, described Wound-rotor type antenna comprises first end, second end and intermediate ends, described radio frequency filter circuit comprises the 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity, tenth electric capacity, first inductance, second inductance, described first end is connected with the TX2 pin of described first inductance with described radio frequency Card Reader chip through described 3rd electric capacity, described second end is connected with the TX1 pin of described second inductance with described radio frequency Card Reader chip through described 4th electric capacity, described intermediate ends ground connection, and be connected with the TVSS pin of described radio frequency Card Reader chip, described 5th electric capacity and described 6th Capacitance parallel connection, and one end after parallel connection respectively with described 3rd electric capacity, described first end connects, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, described 7th electric capacity and described 8th Capacitance parallel connection, and one end after parallel connection respectively with described 4th electric capacity, described second end connect, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, one end of described 9th electric capacity respectively with described 3rd electric capacity, described first inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects, one end of described tenth electric capacity respectively with described 4th electric capacity, described second inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects.
Radio frequency Card Reader chip of the present utility model is connected by Serial Peripheral Interface (SPI) with between master control board, what Serial Peripheral Interface (SPI) transmitted is low speed digital signal, this low speed digital signal has the characteristic that signal is strong, frequency is low, so the impact of resistance on low speed digital signal of the connection winding displacement between radio-frequency antenna plate and master control board and the Connection Block that connects winding displacement two ends is little.Because the impact of resistance on digital signal connecting winding displacement and Connection Block is little, so, reduce the coherence request of the production material that connects winding displacement and Connection Block and quality etc.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment 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 embodiments more of the present utility model, 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 circuit diagram of a kind of embodiment of the utility model radio-frequency antenna plate.
Fig. 2 is the circuit diagram of a kind of embodiment of the utility model card reading circuit.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, be not used for limiting the utility model.
As shown in Figure 1, it is a kind of circuit diagram of embodiment radio-frequency antenna plate.This radio-frequency antenna plate 10 comprises a circuit board 101.Circuit board 101 is provided with Wound-rotor type antenna 103 and radio frequency Card Reader chip 102, and Wound-rotor type antenna 103 is connected with radio frequency Card Reader chip 102, and radio frequency Card Reader chip 102 is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication.
Wound-rotor type antenna 103 is for obtaining the radiofrequency signal of radiofrequency signal or the transmission of received RF Card Reader chip 102, radio frequency Card Reader chip 102 is for being converted to low speed digital signal or low speed digital signal being converted to radiofrequency signal by radiofrequency signal, Serial Peripheral Interface (SPI) is for transmitting low speed digital signal.
Circuit board 10 is also provided with radio frequency crystal oscillating circuit 104, radio frequency crystal oscillating circuit 104 is electrically connected with radio frequency Card Reader chip 102, radio frequency crystal oscillating circuit 104 is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip 102, control the read-write operation of Wound-rotor type antenna 103 pairs of contactless integrated circuit cards.
Radio frequency crystal oscillating circuit 104 comprises crystal resonator 1043, first electric capacity 1041 and the second electric capacity 1042.One end of crystal resonator 1043 is connected with the OSCIN pin of one end of the first electric capacity 1041, radio frequency Card Reader chip 102.The other end of crystal resonator 1043 is connected with the OSCOUT pin of one end of the second electric capacity 1042, radio frequency Card Reader chip 102.The other end of the first electric capacity 1041 and the other end of the second electric capacity 1042 ground connection respectively, the AVSS pin ground connection of radio frequency Card Reader chip 102.
Circuit board 10 is also provided with radio frequency filter circuit 105, and radio frequency filter circuit 105 is electrically connected with radio frequency Card Reader chip 102, and radio frequency filter circuit 105 is for carrying out filtering process by the radiofrequency signal transmitted between radio frequency Card Reader chip 102 and Wound-rotor type antenna 103.
Wound-rotor type antenna 103 comprises first end 1031, second end 1032 and intermediate ends 1033, and radio frequency filter circuit 105 comprises the 3rd electric capacity 1051, the 4th electric capacity 1053, the 5th electric capacity 1055, the 6th electric capacity 1056, the 7th electric capacity 1057, the 8th electric capacity 1058, the 9th electric capacity 1059, the tenth electric capacity 10510, first inductance 1052, second inductance 1054.
First end 1031 is connected with the TX2 pin of the first inductance 1052 with radio frequency Card Reader chip 102 through the 3rd electric capacity 1051, second end 1032 is connected with the TX1 pin of the second inductance 1054 with radio frequency Card Reader chip 102 through the 4th electric capacity 1053, intermediate ends 1033 ground connection, and be connected with the TVSS pin of radio frequency Card Reader chip 102.
5th electric capacity 1055 and the parallel connection of the 6th electric capacity 1056, and the one end after parallel connection is connected with the 3rd electric capacity 1051, first end 1031 respectively, the other end after parallel connection is connected with intermediate ends 1033, TVSS pin respectively.
7th electric capacity 1057 and the parallel connection of the 8th electric capacity 1058, and the one end after parallel connection is connected with the 4th electric capacity 1053, second end 1032 respectively, the other end after parallel connection is connected with intermediate ends 1033, TVSS pin respectively.
One end of 9th electric capacity 1059 is connected with the 3rd electric capacity 1051, first inductance 1052 respectively, its other end is connected with intermediate ends 1033, TVSS pin respectively, one end of tenth electric capacity 10510 is connected with the 4th electric capacity 1053, second inductance 1054 respectively, and its other end is connected with intermediate ends 1033, TVSS pin respectively.
First, radio frequency Card Reader chip 102 of the present utility model is connected by Serial Peripheral Interface (SPI) with between master control board, and what Serial Peripheral Interface (SPI) transmitted is low speed digital signal.This low speed digital signal has the characteristic that signal is strong, frequency is low, so the impact of resistance on low speed digital signal of the connection winding displacement between radio-frequency antenna plate and master control board and the Connection Block that connects winding displacement two ends is little.Because the impact of resistance on digital signal connecting winding displacement and Connection Block is little, so, reduce the coherence request of the production material that connects winding displacement and Connection Block and quality etc.
Secondly, the utility model radio frequency crystal oscillating circuit 104 is for generation of standard time clock pulse signal, and radio frequency Card Reader chip is under radio frequency crystal oscillating circuit coordinates, carry out communicating with master control board and control Wound-rotor type antenna and contact-free integrated circuit (Itegrated Circuit, IC) is blocked carry out read-write operation.
Finally, radio frequency filter circuit 105 carries out filtering process for the radiofrequency signal will transmitted between radio frequency Card Reader chip and Wound-rotor type antenna.
As shown in Figure 2, it is a kind of circuit diagram of embodiment card reading circuit.Card reading circuit comprises master control board 20 and radio-frequency antenna plate 10, radio-frequency antenna plate 10 comprises a circuit board 101, circuit board 101 is provided with Wound-rotor type antenna 103 and radio frequency Card Reader chip 102, Wound-rotor type antenna 103 is connected with radio frequency Card Reader chip 102, and radio frequency Card Reader chip 102 is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication.
Wound-rotor type antenna 103 is for obtaining the radiofrequency signal of radiofrequency signal or the transmission of received RF Card Reader chip 102, radio frequency Card Reader chip 102 is for being converted to low speed digital signal or low speed digital signal being converted to radiofrequency signal by radiofrequency signal, Serial Peripheral Interface (SPI) is for transmitting low speed digital signal.
Be provided with between master control board with radio-frequency antenna plate and be connected winding displacement, the one end connecting winding displacement is connected with the Serial Peripheral Interface (SPI) of radio-frequency antenna plate, the other end connecting winding displacement is connected with master control board, and the low speed digital signal that master control board is used for the transmission of radio frequency antenna plate carries out processing or send low speed digital signal to radio-frequency antenna plate.
Circuit board 10 is also provided with radio frequency crystal oscillating circuit 104, radio frequency crystal oscillating circuit 104 is electrically connected with radio frequency Card Reader chip 102, radio frequency crystal oscillating circuit 104 is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip 102, control the read-write operation of Wound-rotor type antenna 103 pairs of contactless integrated circuit cards.
Radio frequency crystal oscillating circuit 104 comprises crystal resonator 1043, first electric capacity 1041 and the second electric capacity 1042.One end of crystal resonator 1043 is connected with the OSCIN pin of one end of the first electric capacity 1041, radio frequency Card Reader chip 102.The other end of crystal resonator 1043 is connected with the OSCOUT pin of one end of the second electric capacity 1042, radio frequency Card Reader chip 102.The other end of the first electric capacity 1041 and the other end of the second electric capacity 1042 ground connection respectively, the AVSS pin ground connection of radio frequency Card Reader chip 102.
Circuit board 10 is also provided with radio frequency filter circuit 105, and radio frequency filter circuit 105 is electrically connected with radio frequency Card Reader chip 102, and radio frequency filter circuit 105 is for carrying out filtering process by the radiofrequency signal transmitted between radio frequency Card Reader chip 102 and Wound-rotor type antenna 103.
Wound-rotor type antenna 103 comprises first end 1031, second end 1032 and intermediate ends 1033, and radio frequency filter circuit 105 comprises the 3rd electric capacity 1051, the 4th electric capacity 1053, the 5th electric capacity 1055, the 6th electric capacity 1056, the 7th electric capacity 1057, the 8th electric capacity 1058, the 9th electric capacity 1059, the tenth electric capacity 10510, first inductance 1052, second inductance 1054.
First end 1031 is connected with the TX2 pin of the first inductance 1052 with radio frequency Card Reader chip 102 through the 3rd electric capacity 1051, second end 1032 is connected with the TX1 pin of the second inductance 1054 with radio frequency Card Reader chip 102 through the 4th electric capacity 1053, intermediate ends 1033 ground connection, and be connected with the TVSS pin of radio frequency Card Reader chip 102.
5th electric capacity 1055 and the parallel connection of the 6th electric capacity 1056, and the one end after parallel connection is connected with the 3rd electric capacity 1051, first end 1031 respectively, the other end after parallel connection is connected with intermediate ends 1033, TVSS pin respectively.
7th electric capacity 1057 and the parallel connection of the 8th electric capacity 1058, and the one end after parallel connection is connected with the 4th electric capacity 1053, second end 1032 respectively, the other end after parallel connection is connected with intermediate ends 1033, TVSS pin respectively.
One end of 9th electric capacity 1059 is connected with the 3rd electric capacity 1051, first inductance 1052 respectively, its other end is connected with intermediate ends 1033, TVSS pin respectively, one end of tenth electric capacity 10510 is connected with the 4th electric capacity 1053, second inductance 1054 respectively, and its other end is connected with intermediate ends 1033, TVSS pin respectively.
It should be noted that: the concrete structure of the radio-frequency antenna plate 10 in the present embodiment, and the technique effect reached does not repeat them here, consistent with the structure of the radio-frequency antenna plate 10 that above-described embodiment describes.
First, because radio frequency Card Reader chip 102 and the Wound-rotor type antenna 103 of, card reading circuit of the present utility model are integrated on radio-frequency antenna plate 10, so the signal of radio frequency Card Reader chip 102 can not be subject to the interference of the signal on the chip in master control board 20.Therefore, the interference free performance of card reading circuit of the present utility model is improved.
Secondly, due to, radio frequency Card Reader chip 102 and the Wound-rotor type antenna 103 of card reading circuit of the present utility model are integrated on radio-frequency antenna plate 10, so the circuit in master control board 20 is simplified.So, reduce the design complexities of the circuit in master control board 20, and reduce the design cost of master control board 20.
Again, radio frequency Card Reader chip 102 of the present utility model is connected by Serial Peripheral Interface (SPI) with between master control board 20, and what described Serial Peripheral Interface (SPI) transmitted is low speed digital signal.This low speed digital signal has the characteristic that signal is strong, frequency is low, so the impact of resistance on low speed digital signal of the connection winding displacement between radio-frequency antenna plate and master control board 20 and the Connection Block that connects winding displacement two ends is little.Because the impact of resistance on digital signal connecting winding displacement and Connection Block is little, so, reduce the coherence request of the production material that connects winding displacement and Connection Block and quality etc.
Finally, the coherence request of card reading circuit of the present utility model to the production material of connection winding displacement, Connection Block and quality etc. is not higher, so, generate every a collection of card reading circuit, only need to debug front several card reading circuit, follow-up card reading circuit only needs to carry out Mass production according to the parameter of having debugged.Therefore, the debugging cost of card reading circuit is reduced.
Be described in detail the embodiment of utility model above, but it is as example, the utility model does not limit and embodiment described above.For a person skilled in the art, any equivalent modifications or alternative also all among category of the present utility model that this utility model is carried out, therefore, not departing from the equalization conversion and amendment, improvement etc. done under spirit of the present utility model and spirit, all should be encompassed in scope of the present utility model.
Claims (10)
1. a radio-frequency antenna plate, it is characterized in that, it comprises a circuit board, described circuit board is provided with Wound-rotor type antenna and radio frequency Card Reader chip, described Wound-rotor type antenna is connected with described radio frequency Card Reader chip, and described radio frequency Card Reader chip is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication; Described Wound-rotor type antenna is used for described radio frequency Card Reader chip emission radiofrequency signal, and described radio frequency Card Reader chip is used for described radiofrequency signal to be converted to digital signal, and described Serial Peripheral Interface (SPI) is for sending described digital signal to described master control board.
2. radio-frequency antenna plate according to claim 1, it is characterized in that, described circuit board is also provided with radio frequency crystal oscillating circuit, described radio frequency crystal oscillating circuit and described radio frequency Card Reader chip electrical connect, described radio frequency crystal oscillating circuit is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip, control described Wound-rotor type antenna and carry out read-write operation.
3. radio-frequency antenna plate according to claim 2, it is characterized in that, described radio frequency crystal oscillating circuit comprises crystal resonator, the first electric capacity and the second electric capacity, one end of described crystal resonator is connected with the OSCIN pin of one end of described first electric capacity, described radio frequency Card Reader chip, the other end of described crystal resonator is connected with the OSCOUT pin of one end of described second electric capacity, described radio frequency Card Reader chip, the other end of described first electric capacity and the other end of described second electric capacity ground connection respectively, the AVSS pin ground connection of described radio frequency Card Reader chip.
4. radio-frequency antenna plate according to claim 1, it is characterized in that, described circuit board is also provided with radio frequency filter circuit, described radio frequency filter circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency filter circuit is used for the radiofrequency signal transmitted between radio frequency Card Reader chip and Wound-rotor type antenna to carry out filtering process.
5. radio-frequency antenna plate according to claim 4, is characterized in that, described Wound-rotor type antenna comprises first end, second end and intermediate ends, described radio frequency filter circuit comprises the 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity, tenth electric capacity, first inductance, second inductance, described first end is connected with the TX2 pin of described first inductance with described radio frequency Card Reader chip through described 3rd electric capacity, described second end is connected with the TX1 pin of described second inductance with described radio frequency Card Reader chip through described 4th electric capacity, described intermediate ends ground connection, and be connected with the TVSS pin of described radio frequency Card Reader chip, described 5th electric capacity and described 6th Capacitance parallel connection, and one end after parallel connection respectively with described 3rd electric capacity, described first end connects, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, described 7th electric capacity and described 8th Capacitance parallel connection, and one end after parallel connection respectively with described 4th electric capacity, described second end connect, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, one end of described 9th electric capacity respectively with described 3rd electric capacity, described first inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects, one end of described tenth electric capacity respectively with described 4th electric capacity, described second inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects.
6. a card reading circuit, it is characterized in that, described card reading circuit comprises master control board and radio-frequency antenna plate, described radio-frequency antenna plate comprises a circuit board, described circuit board is provided with Wound-rotor type antenna and radio frequency Card Reader chip, described Wound-rotor type antenna is connected with described radio frequency Card Reader chip, and described radio frequency Card Reader chip is provided with the Serial Peripheral Interface (SPI) for being connected with master control board communication; Be provided with between described master control board with described radio-frequency antenna plate and be connected winding displacement, one end of described connection winding displacement is connected with described Serial Peripheral Interface (SPI), the other end of described connection winding displacement is connected with described master control board, described Wound-rotor type antenna is used for described radio frequency Card Reader chip emission radiofrequency signal, described radio frequency Card Reader chip is used for described radiofrequency signal to be converted to digital signal, described Serial Peripheral Interface (SPI) is for sending described digital signal to described master control board, and described master control board is used for processing described digital signal.
7. card reading circuit according to claim 6, it is characterized in that, described circuit board is also provided with radio frequency crystal oscillating circuit, described radio frequency crystal oscillating circuit and described radio frequency Card Reader chip electrical connect, described radio frequency crystal oscillating circuit is for generation of standard time clock pulse signal, and coordinate with radio frequency Card Reader chip, control described Wound-rotor type antenna and carry out read-write operation.
8. card reading circuit according to claim 6, it is characterized in that, described radio frequency crystal oscillating circuit comprises crystal resonator, the first electric capacity and the second electric capacity, one end of described crystal resonator is connected with the OSCIN pin of one end of described first electric capacity, described radio frequency Card Reader chip, the other end of described crystal resonator is connected with the OSCOUT pin of one end of described second electric capacity, described radio frequency Card Reader chip, the other end of described first electric capacity and the other end of described second electric capacity ground connection respectively, the AVSS pin ground connection of described radio frequency Card Reader chip.
9. card reading circuit according to claim 6, it is characterized in that, described circuit board is also provided with radio frequency filter circuit, described radio frequency filter circuit and described radio frequency Card Reader chip electrical connect, and described radio frequency filter circuit is used for the radiofrequency signal transmitted between radio frequency Card Reader chip and Wound-rotor type antenna to carry out filtering process.
10. card reading circuit according to claim 6, is characterized in that, described Wound-rotor type antenna comprises first end, second end and intermediate ends, described radio frequency filter circuit comprises the 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, 8th electric capacity, 9th electric capacity, tenth electric capacity, first inductance, second inductance, described first end is connected with the TX2 pin of described first inductance with described radio frequency Card Reader chip through described 3rd electric capacity, described second end is connected with the TX1 pin of described second inductance with described radio frequency Card Reader chip through described 4th electric capacity, described intermediate ends ground connection, and be connected with the TVSS pin of described radio frequency Card Reader chip, described 5th electric capacity and described 6th Capacitance parallel connection, and one end after parallel connection respectively with described 3rd electric capacity, described first end connects, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, described 7th electric capacity and described 8th Capacitance parallel connection, and one end after parallel connection respectively with described 4th electric capacity, described second end connect, the other end after parallel connection respectively with described intermediate ends, described TVSS pin connects, one end of described 9th electric capacity respectively with described 3rd electric capacity, described first inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects, one end of described tenth electric capacity respectively with described 4th electric capacity, described second inductance connect, its other end respectively with described intermediate ends, described TVSS pin connects.
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CN201520215518.7U CN204515786U (en) | 2015-04-10 | 2015-04-10 | A kind of radio-frequency antenna plate and card reading circuit |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104751089A (en) * | 2015-04-10 | 2015-07-01 | 深圳市卡联科技有限公司 | Radiofrequency antenna board and card reading circuit |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104751089A (en) * | 2015-04-10 | 2015-07-01 | 深圳市卡联科技有限公司 | Radiofrequency antenna board and card reading circuit |
CN104751089B (en) * | 2015-04-10 | 2018-03-20 | 深圳市卡联科技股份有限公司 | A kind of radio-frequency antenna plate and card reading circuit |
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