CN201142684Y - Near-field communication terminal power supply - Google Patents
Near-field communication terminal power supply Download PDFInfo
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- CN201142684Y CN201142684Y CNU2007200762509U CN200720076250U CN201142684Y CN 201142684 Y CN201142684 Y CN 201142684Y CN U2007200762509 U CNU2007200762509 U CN U2007200762509U CN 200720076250 U CN200720076250 U CN 200720076250U CN 201142684 Y CN201142684 Y CN 201142684Y
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Abstract
The utility model relates to a near field communication terminal power supply unit which comprises a non-contact front-end chip, a base band chip, a security chip, an SIM, a reader-writer, an antenna, a low dropout linear regulator, a power supply management unit, a battery, a control switch and a battery voltage detecting circuit. The power supply unit is characterized in that the non-contact front-end chip comprises a RF rectifying circuit, an external field detecting circuit and a non-contact front-end post processing part. The power supply unit feeds the terminal with power in a manner of combining residual electricity quantity of the battery and the external field detection when a cell phone is power off, thus allowing the terminal to perform the function of non-contact card simulation normally, fully utilizing the residual electricity quantity of the battery of the terminal, improving the effective utilization rate of the battery, avoiding the burden that a user must carry a standby battery all the time, and meanwhile reducing the application cost of the terminal virtually.
Description
Technical field
The utility model relates to a kind of communications terminal supply unit, is specifically related to a kind of near-field communication (Near FieldCommunication, NFC) terminal electric supply installation.
Background technology
In recent years, pay by mails and professionally to have goed deep into our life, brought many facilities, particularly in fixing place of business to us, (Integrated Circuit, IC) Ka E-Payment business has formed mature technique and stable market based on integrated circuit.Since 2006,, become present focus based on the mobile payment service of mobile phone and mobile communication platform along with near-field communication technology popularization.This emerging market of near-field communication has begun to start, and various solutions emerge in an endless stream.In present communications terminal supply unit, mostly just adopt powered battery, and under the situation that battery is stopped power supply, this terminal can't work on.
Shown in Figure 1 is a kind of near-field communication terminal of prior art, comprise battery 2 ', Power Management Unit 5 ' (Power Management Unit, PMU), low pressure difference linear voltage regulator 1 ', non-contact front-end chip, safety chip 11 ', baseband chip 6 ', Subscriber Identity Module 10 ', read write line 13 ' and antenna 4 '.
Above-mentioned battery 2 ' connects Power Management Unit 5 ' and low pressure difference linear voltage regulator 1 ' successively, low pressure difference linear voltage regulator 1 ' connects non-contact front-end chip, read write line 13 ', safety chip 11 ', baseband chip 6 ' and Subscriber Identity Module 10 ' respectively, is above-mentioned five module for power supply.
Above-mentioned non-contact front-end chip is attachment security chip 11 ', baseband chip 6 ', Subscriber Identity Module 10 ' and antenna 4 ' respectively, and with safety chip 11 ', baseband chip 6 ', Subscriber Identity Module 10 ' bi-directional transfer of data.
Above-mentioned Subscriber Identity Module 10 ' connects baseband chip 6 ', bi-directional transfer of data.
Above-mentioned safety chip 11 ' connects read write line 13 ', bi-directional transfer of data.
Above-mentioned non-contact front-end chip is connected bi-directional transfer of data with S2C (SigIn-SigOut-Connection, the signal input and output connect) interface mode with safety chip.
Above-mentioned non-contact front-end chip is the non-contact front-end chip PN511 that NXP (grace intelligence Pu) company produces; Above-mentioned safety chip is the safety chip SmartMX that NXP company produces.
Safety chip is handled the data of non-contact application and is preserved and safety management; Non-contact front-end chip is finished the interface conversion work of S2C signal and extraneous non-contact signal, and data of using with baseband chip and instruction exchange.
In this near-field communication terminal use, after battery was consumed, the output voltage of battery progressively reduced, and when cell voltage reduces to its minimum value Vmin when following, battery damages.In order to protect battery, Power Management Unit is reduced to a certain threshold value detecting battery output, when promptly shutting down threshold value Vth, closes all termination function.Though this moment, battery still had certain remaining capacity, can't carry out any work.
So the shortcoming of this its electric supply installation of near-field communication terminal is:
1. existing near-field communications terminal supply unit is under the situation of manually shutdown, and battery will stop to all module for power supply, cause this terminal to work, and the less function of some power consumptions of this terminal can't work under off-mode.
2. existing near-field communications terminal supply unit is at cell voltage during less than shutdown threshold value Vth, battery will stop to all module for power supply, automatically shutdown, cause this terminal to work, some power consumptions of this terminal can't work under off-mode less than the non-contact card analog functuion of shutdown threshold value Vth.
3. can't utilize the remaining capacity of its end cell, reduce the effective rate of utilization of battery.
4. can't utilize mode such as external field detection to obtain extra power, support the less function of power consumption under off-mode, to work on.
5. increase the burden that the user must carry reserve battery whenever and wherever possible, also improved simultaneously the use cost of this terminal virtually.
This terminal supply power mode that depends on Power Management Unit unified in the mobile phone, can cause inconvenience in actual applications, for example, when near-field communication terminal uses as the subway card, the user may be after normally entering the subway gate, and battery of mobile phone is not enough and shutdown automatically, because this moment, near-field communication terminal can not be worked, the user can't finish the departures transaction, thereby can't set off.
Prior art also has a kind of power supply apparatus for handset, it comprises handset shell, rechargeable battery, in handset shell, be provided with the power supply enter conductive film, its characteristics are: place at least two rechargeable batteries in handset shell, wherein the electrode of the rechargeable battery power supply enter conductive film interior with being arranged on handset shell is connected.It has easy to carry, prolongs the mobile phone characteristics of charged service time.
This power supply apparatus for handset has also only prolonged the service time of power supply, and after shutdown, terminal still can't be carried out any work.
Then battery voltage detection circuit output control signal LDO_EN is invalid, and low pressure difference linear voltage regulator turn-offs, and ON-OFF control circuit is according to battery mode PMOD signal, and selector switch 8A turn-offs, switch 8B closure;
The operating voltage DVDD of low pressure difference linear voltage regulator output is in power-down state, and simultaneously, the operating voltage CVDD of RF rectification circuit output is in power-down state, and therefore, entire circuit is in power-down state, and MVDD does not have power supply; Safety chip, Subscriber Identity Module, read write line and non-contact front-end chip reprocessing part all quit work.
The purpose of this utility model provides a kind of near-field communications terminal supply unit, it mainly is to be in manual or automatic off-mode at mobile phone, by making the bigger read write line power down of power consumption, use the remaining capacity and the external field of battery to detect the mode that combines, be the terminal power supply, make the function that terminal can the simulation of normal running non-contact card.Make full use of the remaining capacity of its end cell, improved the effective rate of utilization of battery.The burden that it has avoided the user must carry reserve battery whenever and wherever possible, also the while has been reduced the use cost of this terminal virtually.
Description of drawings
Fig. 1 is existing near-field communications terminal supply unit circuit block diagram.
Fig. 2 is the utility model near-field communications terminal supply unit circuit theory diagrams.
Fig. 3 is the block diagram of the utility model near-field communication terminal method of supplying power to.
Embodiment
Provide a kind of better embodiment of the present utility model below in conjunction with Fig. 2 and Fig. 3, to describe the technical solution of the utility model in detail.
As shown in Figure 2, in the present embodiment, baseband chip 6 is baseband chips of the E-GOLDPMB7880 model of Infineon company production, Subscriber Identity Module 10 is Subscriber Identity Modules of the S3FS9DG model of Samsung company production, non-contact front-end chip (being made up of RF rectification circuit 3, external field detection 12 and non-contact front-end reprocessing part 9) and safety chip 10 are integrated on the chips, adopt the contactless CPU card chip FM1920 of Shanghai Fudan Microelectronics Co., Ltd's exploitation.Described low pressure difference linear voltage regulator adopts TI company's T PS79311.
In the various functions that terminal provides, the power consumption of non-contact card analog functuion is less, and the function power consumption that read write line is relevant is bigger.In user's actual use, under the mobile phone shutdown state, non-contact card analog functuion when the function that need use is main does not generally need to open the read write line function of initiatively concluding the business or communicating by letter.
In the present embodiment, the initial voltage of battery is 3.5V, and with increasing service time, its magnitude of voltage drops to 2.3V,
The port 2 of above-mentioned control switch connects the port 3 of RF rectification circuit, receives the operating voltage CVDD that the RF rectification circuit provides;
The port 3 of above-mentioned control switch connects the port 4 that connects control switch respectively, port one, the port one of Subscriber Identity Module and the port one of safety chip of non-contact front-end reprocessing part, and control switch provides operating voltage MVDD to non-contact front-end reprocessing part, Subscriber Identity Module and safety chip;
The port one of above-mentioned RF rectification circuit is connected antenna ends respectively with port 2;
The port 4 of above-mentioned RF rectification circuit connects the port one of external field testing circuit;
The port 2 of above-mentioned non-contact front-end reprocessing part connects the port 2 of Subscriber Identity Module and the port 3 of safety chip, bi-directional transfer of data respectively;
The port 2 of above-mentioned Power Management Unit connects the port one of baseband chip, and to baseband chip transmission operating voltage BB_VDD;
The port 2 of above-mentioned safety chip connects the port 2 of read write line, bi-directional transfer of data.
Above-mentioned safety chip and non-contact front-end chip are integrated into a chips, and the shutdown threshold value Vth of above-mentioned battery and the minimum value Vmin of its operate as normal are by setting in the safety chip.
A kind of near-field communication terminal method of supplying power to that uses near-field communications terminal supply unit is characterized in that, comprises following steps:
Step 1, battery voltage detection circuit obtain the starting up of terminal status signal BB_POWER_ON by the baseband chip transmission;
Above-mentioned steps 4 comprises following steps:
Step 4.1, effective as open state signal BB_POWER_ON, during the shutdown threshold value Vth of operating voltage Bat_VDD＞battery, the battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode one;
Step 4.2, when open state signal BB_POWER_ON invalid, the signal RF_DET of external field testing circuit output is effective, and during the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＞battery, the battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode two;
Step 4.3, when open state signal BB_POWER_ON invalid, the signal RF_DET of external field testing circuit output is effective, and during the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＜battery, the battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode three;
Step 4.4, when open state signal BB_POWER_ON is invalid, when the signal RF_DET of external field testing circuit output was invalid, the battery powered mode status signal PMOD of battery voltage detection circuit output was a battery mode four.
Above-mentioned step 1 comprises following steps:
Step 1.1, above-mentioned battery provide operating voltage BAT_VDD to Power Management Unit and battery voltage detection circuit;
Step 1.2, above-mentioned Power Management Unit provide operating voltage BB_VDD to baseband chip;
Step 1.3, above-mentioned baseband chip are to battery voltage detection circuit transmission terminal open state signal BB_POWER_ON.
Above-mentioned step 2 comprises following steps:
Step 2.1, execution in step 4.1 when the open state signal BB_POWER_ON that receives when above-mentioned battery voltage detection circuit is effective;
Step 2.2, execution in step 3 when the open state signal BB_POWER_ON that receives when above-mentioned battery voltage detection circuit is invalid.
Above-mentioned step 3 comprises following steps:
Step 3.1, when the mobile phone power-on status signal BB_POWER_ON of baseband chip output is invalid, promptly mobile phone is in manual or automatic off-mode, and the control signal RF_DET of external field testing circuit output is effective,
When the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＞battery, execution in step 4.2;
When the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＜battery, execution in step 4.3;
Step 3.2, when the mobile phone power-on status signal BB_POWER_ON of baseband chip output is invalid, promptly mobile phone is in off-mode, and the control signal RF_DET of external field testing circuit output is when invalid, execution in step 4.4.
Above-mentioned step 4.1 comprises following steps:
The battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode one:
At this moment, BB_POWER_ON is effective for the open state signal, the shutdown threshold value Vth of operating voltage Bat_VDD＞battery;
Then battery voltage detection circuit output control signal LDO_EN is effective, and low pressure difference linear voltage regulator is opened, and control switch is according to battery mode PMOD signal, selector switch 8A closure, and switch 8B turn-offs;
The operating voltage MVDD of non-contact front-end chip reprocessing part, Subscriber Identity Module and safety chip and the operating voltage of read write line provide by the operating voltage DVDD of low pressure difference linear voltage regulator output.
Above-mentioned step 4.2 comprises following steps:
The battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode two:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF DET of external field testing circuit output is effective, and the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＞battery;
Then battery voltage detection circuit output control signal LDO_EN is effective, and low pressure difference linear voltage regulator is opened, and control switch is according to battery mode PMOD signal, selector switch 8A closure, and switch 8B turn-offs;
Safety chip turn-offs the higher read write line of power consumption, and read write line quits work, and the operating voltage MVDD of non-contact front-end chip reprocessing part, Subscriber Identity Module and safety chip is provided by the operating voltage DVDD of low pressure difference linear voltage regulator output.
Above-mentioned step 4.3 comprises following steps:
The battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode three:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF_DET of external field testing circuit output is effective, and the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＜battery;
Then battery voltage detection circuit output control signal LDO_EN is invalid, and low pressure difference linear voltage regulator is in off state, and ON-OFF control circuit is according to battery mode PMOD signal, and selector switch 8A turn-offs, switch 8B closure;
Safety chip turn-offs the higher read write line of power consumption, and read write line quits work, and the operating voltage MVDD of non-contact front-end chip reprocessing part, Subscriber Identity Module and safety chip is provided by the operating voltage CVDD of RF rectification circuit output.
Above-mentioned step 4.4 comprises following steps:
The battery powered mode status signal PMOD of battery voltage detection circuit output is a battery mode four:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF_DET of external field testing circuit output is invalid;
Then battery voltage detection circuit output control signal LDO_EN is invalid, and low pressure difference linear voltage regulator turn-offs, and ON-OFF control circuit is according to battery mode PMOD signal, and selector switch 8A turn-offs, switch 8B closure;
The operating voltage DVDD of low pressure difference linear voltage regulator output is in power-down state, and simultaneously, the operating voltage CVDD of RF rectification circuit output is in power-down state, and therefore, entire circuit is in power-down state, and MVDD does not have power supply; Safety chip, Subscriber Identity Module, read write line and non-contact front-end chip reprocessing part all quit work.
The purpose of this utility model provides a kind of near-field communications terminal supply unit, it mainly is to be in manual or automatic off-mode at mobile phone, by making the bigger read write line power down of power consumption, use the remaining capacity and the external field of battery to detect the mode that combines, be the terminal power supply, make the function that terminal can the simulation of normal running non-contact card.Make full use of the remaining capacity of its end cell, improved the effective rate of utilization of battery.The burden that it has avoided the user must carry reserve battery whenever and wherever possible, also the while has been reduced the use cost of this terminal virtually.
Description of drawings
Fig. 1 is existing near-field communications terminal supply unit circuit block diagram.
Fig. 2 is the utility model near-field communications terminal supply unit circuit theory diagrams.
Fig. 3 is the block diagram of the utility model near-field communication terminal method of supplying power to.
Embodiment
Provide a kind of better embodiment of the present utility model below in conjunction with Fig. 2 and Fig. 3, to describe the technical solution of the utility model in detail.
As shown in Figure 2, in the present embodiment, baseband chip 6 is baseband chips of the E-GOLDPMB7880 model of Infineon company production, Subscriber Identity Module 10 is Subscriber Identity Modules of the S3FS9DG model of Samsung company production, non-contact front-end chip (being made up of RF rectification circuit 3, external field detection 12 and non-contact front-end reprocessing part 9) and safety chip 10 are integrated on the chips, adopt the contactless CPU card chip FM1920 of Shanghai Fudan Microelectronics Co., Ltd's exploitation.Described low pressure difference linear voltage regulator adopts TI company's T PS79311.
In the various functions that terminal provides, the power consumption of non-contact card analog functuion is less, and the function power consumption that read write line is relevant is bigger.In user's actual use, under the mobile phone shutdown state, non-contact card analog functuion when the function that need use is main does not generally need to open the read write line function of initiatively concluding the business or communicating by letter.
In the present embodiment, the initial voltage of battery is 3.5V, and with increasing service time, its magnitude of voltage drops to 2.3V, and in use for some time, its magnitude of voltage drops to 1.8V; Battery shutdown threshold value Vth is 2.5V; The minimum value Vmin of battery operate as normal is 2V; Described non-contact front-end chip obtains voltage by antenna 4 from the external magnetic field coupling, and after 3 rectifications of RF rectification circuit, the generation magnitude of voltage is 2.1 volts operating voltage CVDD.
A kind of near-field communications terminal supply unit as shown in Figure 2 comprises non-contact front-end chip, low pressure difference linear voltage regulator 1, battery 2, antenna 4, Power Management Unit 5, baseband chip 6, Subscriber Identity Module 10, safety chip 11 and read write line 13; It is characterized in that: also comprise battery voltage detection circuit 7 and control switch 8, described non-contact front-end chip comprises RF rectification circuit 3, external field testing circuit 12 and non-contact front-end reprocessing part 9;
The port 71 of described battery voltage detection circuit 7 connects the port 62 of baseband chip 6, receives the starting up of terminal status signal BB_POWER_ON that baseband chip 6 sends;
The port 72 of described battery voltage detection circuit 7 connects the port 21 of battery 2, the port one 001 of low pressure difference linear voltage regulator 1 and the port 51 of Power Management Unit 5 respectively, and battery 2 provides operating voltage BAT_VDD to low pressure difference linear voltage regulator 1, Power Management Unit 5 and battery voltage detection circuit 7 respectively;
The port 73 of described battery voltage detection circuit 7 connects the port one 003 of low pressure difference linear voltage regulator 1, and to low pressure difference linear voltage regulator 1 transmission of control signals LDO_EN;
The port 74 of described battery voltage detection circuit 7 connects the port one 22 of external field testing circuit 12, receives the control signal RF_DET that external field testing circuit 12 sends;
The port 75 of described battery voltage detection circuit 7 connects the port 85 of control switch 8, and to control switch 8 transmission powering mode status signal PMOD;
The port 81 of described control switch 8 connects the port one 002 of low pressure difference linear voltage regulator 1 and the port one 31 of read write line 13, and low pressure difference linear voltage regulator 1 is the operating voltage DVDD after control switch 8 and read write line 13 transmission voltage stabilizings respectively;
The port 82 of described control switch 8 connects the port 83 of RF rectification circuit 3, receives the operating voltage CVDD that RF rectification circuit 3 provides;
The port 83 of described control switch 8 connects and connects the port 84 of control switch 8, the port 91 of non-contact front-end reprocessing part 9, the port one 01 of Subscriber Identity Module 10 and the port one 11 of safety chip 11 respectively, and control switch 8 provides operating voltage MVDD to non-contact front-end reprocessing part 9, Subscriber Identity Module 10 and safety chip 11;
The port 31 of described RF rectification circuit 3 is connected antenna 4 two ends respectively with port 32;
The port 34 of described RF rectification circuit 3 connects the port one 21 of external field testing circuit 12;
The port 92 of described non-contact front-end reprocessing part 9 connects the port one 02 of Subscriber Identity Module 10 and the port one 13 of safety chip 11, bi-directional transfer of data respectively;
The port 52 of described Power Management Unit 5 connects the port 61 of baseband chip 6, and to baseband chip 6 transmission operating voltage BB_VDD;
The port one 12 of described safety chip 11 connects the port one 32 of read write line 13, bi-directional transfer of data.
Described a kind of near-field communications terminal supply unit is characterized in that, described safety chip 11 and non-contact front-end chip are integrated into a chips, and the shutdown threshold value Vth of described battery 2 and the minimum value Vmin of its operate as normal are by setting in the safety chip 6.
As shown in Figure 3, in the battery use, voltage constantly descends, and near-field communications terminal supply unit of the present utility model selects different method of supplying power to that it is powered.
(1). its voltage was 3.5V when battery had just begun to circuit supply, and cell voltage is greater than shutdown threshold value Vth, the terminal operate as normal, its method of supplying power to is as follows:
Step 1.1, battery 2 provide operating voltage BAT_VDD by circuit to Power Management Unit 5 and battery voltage detection circuit 7;
Step 1.2, described Power Management Unit 5 provide operating voltage BB_VDD to baseband chip 6;
Step 1.3, described baseband chip 6 are to the effective starting up of terminal status signal BB_POWER_ON of battery voltage detection circuit 7 transmission.
Execution in step 4.1 when the open state signal BB_POWER_ON that step 2.1, described battery voltage detection circuit 7 receive is effective;
The battery powered mode status signal PMOD of step 4.1, battery voltage detection circuit 7 outputs is a battery mode one:
At this moment, BB_POWER_ON is effective for the open state signal, and Bat_VDD is 3.5V, and Vth is 2.5V, Bat_VDD＞Vth;
Then battery voltage detection circuit output control signal LDO_EN is effective, low pressure difference linear voltage regulator 1 is opened, and is output as the operating voltage DVDD of 2.9V after the Bat_VDD voltage stabilizing with 3.5V, and control switch 8 is according to battery mode PMOD signal, selector switch 8A closure, switch 8B turn-offs;
The operating voltage MVDD of non-contact front-end chip reprocessing part 9, Subscriber Identity Module 10 and safety chip 11 and the operating voltage of read write line 13 provide by the operating voltage DVDD of low pressure difference linear voltage regulator 1 output, and operating voltage MVDD is 2.9V.
(2). battery in use for some time, its magnitude of voltage drops to 2.3V, cell voltage is automatically shutdown less than shutdown threshold value Vth, but battery supply is greater than the minimum value Vmin of battery operate as normal.Antenna 4 can be coupled from outside card reader magnetic field and obtain voltage, after 3 rectifications of RF rectification circuit, produces operating voltage CVDD, and operating voltage CVDD equals 2.1V, and its method of supplying power to is as follows:
Step 1.1, battery 2 provide operating voltage BAT_VDD by circuit to Power Management Unit 5 and battery voltage detection circuit 7;
Step 1.2, described Power Management Unit 5 provide operating voltage BB_VDD to baseband chip 6;
Step 1.3, described baseband chip 6 are to the invalid starting up of terminal status signal BB_POWER_ON of battery voltage detection circuit 7 transmission.
The open state signal BB_POWER_ON that step 2.2, described battery voltage detection circuit 7 receive is invalid, execution in step 3.
Step 3.1, when the mobile phone power-on status signal BB_POWER_ON of baseband chip 6 output invalid, be that mobile phone is in manual or automatic off-mode, and the control signal RF_DET of external field testing circuit 12 outputs is effective, when the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＞battery, execution in step 4.2;
The battery powered mode status signal PMOD of step 4.2, battery voltage detection circuit 7 outputs is a battery mode two:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF_DET of external field testing circuit 12 outputs is effective, and Bat_VDD＞Vmin;
Then battery voltage detection circuit 7 output control signal LDO_EN are effective, low pressure difference linear voltage regulator 1 is opened, and is output as the operating voltage DVDD of 2.2V after the Bat_VDD voltage stabilizing with 2.3V, and control switch 8 is according to battery mode PMOD signal, selector switch 8A closure, switch 8B turn-offs;
(3). battery in use for some time, its magnitude of voltage drops to 1.8V, cell voltage is less than the minimum value Vmin of battery operate as normal, terminal is shut down automatically.Antenna 4 can be coupled from outside card reader magnetic field and obtain operating voltage, after 3 rectifications of RF rectification circuit, produces operating voltage CVDD, and operating voltage CVDD equals 2.1V, and its method of supplying power to is as follows:
Step 1.1, battery 2 provide operating voltage BAT_VDD by circuit to Power Management Unit 5 and battery voltage detection circuit 7;
Step 1.2, described Power Management Unit 5 provide operating voltage BB_VDD to baseband chip 6;
Step 1.3, described baseband chip 6 are to the invalid starting up of terminal status signal BB_POWER_ON of battery voltage detection circuit 7 transmission.
The open state signal BB_POWER_ON that step 2.2, described battery voltage detection circuit 7 receive is invalid, execution in step 3.
Step 3.1, when the mobile phone power-on status signal BB_POWER_ON of baseband chip 6 output invalid, be that mobile phone is in manual or automatic off-mode, and the control signal RF_DET of external field testing circuit 12 outputs is effective, when the minimum value Vmin of the operate as normal of operating voltage Bat_VDD＜battery, execution in step 4.3;
The battery powered mode status signal PMOD of step 4.3, battery voltage detection circuit 7 outputs is a battery mode three:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF_DET of external field testing circuit 12 outputs is effective, and Bat_VDD＜Vmin;
Then battery voltage detection circuit 7 output control signal LDO_EN are invalid, and low pressure difference linear voltage regulator 1 is in off state, and ON-OFF control circuit 8 is according to battery mode PMOD signal, and selector switch 8A turn-offs, switch 8B closure;
(4). battery in use for some time, its magnitude of voltage drops to 1.8V, cell voltage is less than the minimum value Vmin of battery operate as normal, terminal is shut down automatically.Antenna 4 can not be coupled from outside card reader magnetic field and obtain operating voltage, and its method of supplying power to is as follows:
Step 1.1, battery 2 provide operating voltage BAT_VDD by circuit to Power Management Unit 5 and battery voltage detection circuit 7;
Step 1.2, described Power Management Unit 5 provide operating voltage BB_VDD to baseband chip 6;
Step 1.3, described baseband chip 6 are to the invalid starting up of terminal status signal BB_POWER_ON of battery voltage detection circuit 7 transmission.
The open state signal BB_POWER_ON that step 2.2, described battery voltage detection circuit 7 receive is invalid, execution in step 3.
The mobile phone power-on status signal BB_POWER_ON of step 3.2, baseband chip 6 outputs is invalid, and promptly mobile phone is in off-mode, and the control signal RF_DET of external field testing circuit output is invalid, execution in step 4.4.
The battery powered mode status signal PMOD of step 4.4, battery voltage detection circuit 7 outputs is a battery mode four:
At this moment, BB_POWER_ON is invalid for the open state signal, and the signal RF_DET of external field testing circuit 12 outputs is invalid, and Bat_VDD＜Vmin;
Then battery voltage detection circuit 7 output control signal LDO_EN are invalid, and low pressure difference linear voltage regulator 1 turn-offs, and ON-OFF control circuit 8 is according to battery mode PMOD signal, and selector switch 8A turn-offs, switch 8B closure;
The operating voltage DVDD of low pressure difference linear voltage regulator 1 output is in power-down state, and simultaneously, the operating voltage CVDD of RF rectification circuit output is in power-down state, and therefore, entire circuit is in power-down state, and MVDD does not have power supply; Safety chip 11, Subscriber Identity Module 10, read write line 13 and non-contact front-end chip reprocessing part 9 all quit work.
The purpose of this utility model provides a kind of near-field communications terminal supply unit, it mainly is to be in manual or automatic off-mode at mobile phone, by making the bigger read write line power down of power consumption, use the remaining capacity and the external field of battery to detect the mode that combines, be the terminal power supply, make the function that terminal can the simulation of normal running non-contact card.Make full use of the remaining capacity of its end cell, improved the effective rate of utilization of battery.The burden that it has avoided the user must carry reserve battery whenever and wherever possible, also the while has been reduced the use cost of this terminal virtually.
Claims (4)
1. a near-field communications terminal supply unit comprises non-contact front-end chip, low pressure difference linear voltage regulator (1), battery (2), antenna (4), Power Management Unit (5), baseband chip (6), Subscriber Identity Module (10), safety chip (11) and read write line (13); It is characterized in that: also comprise battery voltage detection circuit (7) and control switch (8), described non-contact front-end chip comprises RF rectification circuit (3), external field testing circuit (12) and non-contact front-end reprocessing part (9);
The port (71) of described battery voltage detection circuit (7) connects the port (62) of baseband chip (6), receives the starting up of terminal status signal BB_POWER_ON that baseband chip (6) sends;
The port (72) of described battery voltage detection circuit (7) connects the port (21) of battery (2), the port (1001) of low pressure difference linear voltage regulator (1) and the port (51) of Power Management Unit (5) respectively, and battery (2) provides operating voltage BAT_VDD to low pressure difference linear voltage regulator (1), Power Management Unit (5) and battery voltage detection circuit (7) respectively;
The port (73) of described battery voltage detection circuit (7) connects the port (1003) of low pressure difference linear voltage regulator (1), and to low pressure difference linear voltage regulator (1) transmission of control signals LDO_EN;
The port (74) of described battery voltage detection circuit (7) connects the port (122) of external field testing circuit (12), receives the control signal RF_DET that external field testing circuit (12) sends;
The port (75) of described battery voltage detection circuit (7) connects the port (85) of control switch (8), and to control switch (8) transmission powering mode status signal PMOD;
A switch (8A) two ends of described control switch (8) connect the port (81) and the port (83) of control switch (8) respectively, and another switch (8B) two ends of described control switch (8) connect the port (82) and the port (84) of control switch (8) respectively;
The port (81) of described control switch (8) connects the port (1002) of low pressure difference linear voltage regulator (1) and the port (131) of read write line (13), and low pressure difference linear voltage regulator (1) is the operating voltage DVDD after control switch (8) and read write line (13) transmission voltage stabilizing respectively;
The port (82) of described control switch (8) connects the port (33) of RF rectification circuit (3), receives the operating voltage CVDD that RF rectification circuit (3) provides;
The port (83) of described control switch (8) connects the port (84) that connects control switch (8) respectively, port (91), the port (101) of Subscriber Identity Module (10) and the port (111) of safety chip (11) of non-contact front-end reprocessing part (9), and control switch (8) provides operating voltage MVDD to non-contact front-end reprocessing part (9), Subscriber Identity Module (10) and safety chip (11);
The port (31) of described RF rectification circuit (3) is connected antenna (4) two ends respectively with port (32);
The port (34) of described RF rectification circuit (3) connects the port (121) of external field testing circuit (12);
The port (92) of described non-contact front-end reprocessing part (9) connects the port (102) of Subscriber Identity Module (10) and the port (113) of safety chip (11), bi-directional transfer of data respectively;
The port (52) of described Power Management Unit (5) connects the port (61) of baseband chip (6), and to baseband chip (6) transmission operating voltage BB_VDD;
The port (112) of described safety chip (11) connects the port (132) of read write line (13), bi-directional transfer of data.
2. a kind of near-field communications terminal supply unit as claimed in claim 1 is characterized in that, described safety chip (11) and non-contact front-end chip are integrated into a chips.
3. a kind of near-field communications terminal supply unit as claimed in claim 1 is characterized in that, the shutdown threshold value Vth of described battery (2) and the minimum value Vmin of its operate as normal are by setting in the safety chip (6).
4. a kind of near-field communications terminal supply unit as claimed in claim 1 is characterized in that, described non-contact front-end chip obtains voltage by antenna (4) from the external magnetic field coupling, after the rectification of RF rectification circuit, produces operating voltage CVDD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762509U CN201142684Y (en) | 2007-11-16 | 2007-11-16 | Near-field communication terminal power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200762509U CN201142684Y (en) | 2007-11-16 | 2007-11-16 | Near-field communication terminal power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201142684Y true CN201142684Y (en) | 2008-10-29 |
Family
ID=40070392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200762509U Expired - Lifetime CN201142684Y (en) | 2007-11-16 | 2007-11-16 | Near-field communication terminal power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201142684Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999145A (en) * | 2011-06-10 | 2013-03-27 | 美国博通公司 | Communications device for intelligently routing information among multiple user interfaces |
| CN103826005A (en) * | 2012-11-16 | 2014-05-28 | 英特尔移动通信有限责任公司 | Mobile terminal |
| EP2780872A1 (en) * | 2011-11-15 | 2014-09-24 | Famoco | Nfc device and connection system of nfc devices |
| CN110086508A (en) * | 2019-03-28 | 2019-08-02 | 惠州Tcl移动通信有限公司 | Voltage adjusting method, system, storage medium and mobile terminal |
-
2007
- 2007-11-16 CN CNU2007200762509U patent/CN201142684Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102999145A (en) * | 2011-06-10 | 2013-03-27 | 美国博通公司 | Communications device for intelligently routing information among multiple user interfaces |
| CN102999145B (en) * | 2011-06-10 | 2016-02-10 | 美国博通公司 | For the communication facilities of routing iinformation intelligently between multiple user interface |
| US9300363B2 (en) | 2011-06-10 | 2016-03-29 | Broadcom Corporation | Communications device for intelligently routing information among multiple user interfaces |
| US9749016B2 (en) | 2011-06-10 | 2017-08-29 | Nxp Usa, Inc. | Communications device for intelligently routing information among multiple user interfaces |
| EP2780872A1 (en) * | 2011-11-15 | 2014-09-24 | Famoco | Nfc device and connection system of nfc devices |
| CN103826005A (en) * | 2012-11-16 | 2014-05-28 | 英特尔移动通信有限责任公司 | Mobile terminal |
| US9414309B2 (en) | 2012-11-16 | 2016-08-09 | Intel Deutschland Gmbh | Mobile terminal |
| CN110086508A (en) * | 2019-03-28 | 2019-08-02 | 惠州Tcl移动通信有限公司 | Voltage adjusting method, system, storage medium and mobile terminal |
| CN110086508B (en) * | 2019-03-28 | 2021-08-03 | 惠州Tcl移动通信有限公司 | Voltage adjusting method, system, storage medium and mobile terminal |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI FUDAN MICROELECTRONICS GROUP COMPANY LIMI Free format text: FORMER NAME: FUDAN MICROELECTRONICS CO., LTD., SHANGHAI |
|
| CP03 | Change of name, title or address |
Address after: 200433 building 4, Fudan Science Park, 127 Cathay Pacific Road Patentee after: Shanghai Fudan Microelectronic Group Co., Ltd. Address before: 200433, building 4, Fudan Science Park, No. 127 Guotai Road, Shanghai Patentee before: Fudan Microelectronics Co., Ltd., Shanghai |
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| CX01 | Expiry of patent term |
Granted publication date: 20081029 |