CN102291489B - Mobile phone and voltage calibration method thereof - Google Patents
Mobile phone and voltage calibration method thereof Download PDFInfo
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- CN102291489B CN102291489B CN201110228323.2A CN201110228323A CN102291489B CN 102291489 B CN102291489 B CN 102291489B CN 201110228323 A CN201110228323 A CN 201110228323A CN 102291489 B CN102291489 B CN 102291489B
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Abstract
The invention discloses a mobile phone, which comprises an analog-to-digital conversion chip, a baseband processing chip and a power supply management chip, wherein the analog-to-digital conversion chip comprises an analog voltage input end and used for receiving analog voltage with a preset numerical value through the analog voltage input end and converting the analog voltage to digital voltage; the baseband processing chip is used for acquiring a conversion relation between detected digital voltage and analog voltage to be detected according to the analog voltage and the digital voltage; and the power supply management chip comprises a power supply voltage input end and used for receiving independent power supply voltage through the power supply voltage input end and supplying power to the analog-to-digital conversion chip and the baseband processing chip, wherein the analog voltage and the independent power supply voltage are provided by different voltage sources. The invention further discloses a voltage calibration method of the mobile phone. By the technical scheme, the analog voltage and the independent power supply voltage can be provided by the different voltage sources during voltage calibration, so the mobile phone can be used for accurate voltage calibration.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of mobile phone and voltage calibration method thereof.
Background technology
In the process of mobile phone products research and development and production, all need the modulus conversion chip in mobile phone to calibrate, so that pattern modular converter can accurately be measured the corresponding digital signal of analog signal at present.But general when calibrating, capital is used power supply to serve as false powered battery, in power supply, calibrate, because electric power output voltage is to modulus conversion chip and this voltage simultaneously as the supply power voltage of mobile phone, so, the voltage outputing in modulus conversion chip can be because the reason of supply current produces pressure drop, this pressure drop meeting causes the actual voltage that enters modulus conversion chip can be lower than the output of power supply, if mobile phone is calibrated with this voltage, can cause calibration value and actual value meeting out less than normal.
Therefore, need badly a kind of mobile phone and voltage calibration method thereof are provided, to address the above problem.
Summary of the invention
The present invention, for solving the problems of the technologies described above, provides a kind of mobile phone and voltage calibration method thereof, can make mobile phone can carry out accurate voltage calibration.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of mobile phone is provided, comprise: modulus conversion chip, comprise analog voltage input, by analog voltage input, receive the analog voltage with predetermined value, modulus conversion chip is converted to digital voltage by analog voltage; Baseband processing chip, obtains the transformational relation between digital voltage and analog voltage according to analog voltage and digital voltage; Power management chip, comprises supply power voltage input, by supply power voltage input, receives independently-powered voltage, thinks modulus conversion chip and baseband processing chip power supply; Wherein, analog voltage and independently-powered voltage are provided by different voltage sources; Voltage source comprises charger and external power supply, analog voltage input is connected with external power supply, modulus conversion chip receives the analog voltage with predetermined value from external power supply by analog voltage output, supply power voltage input is connected with charger, and power management chip receives independently-powered voltage by supply power voltage input from charger.
Wherein, modulus conversion chip receives the first analog voltage V with predetermined value by analog voltage input
1, and by the first analog voltage V
1be converted to the first digital voltage D
1, by analog voltage input, receive the second analog voltage V with predetermined value
2, and by the first analog voltage V
2be converted to the first digital voltage D
2, baseband processing chip obtains according to following formula the transformational relation of surveying between digital voltage and analog voltage to be measured:
Wherein, D
xfor the digital voltage of survey that modulus conversion chip obtains, V
xfor surveying the actual corresponding analog voltage to be measured of digital voltage.
Wherein, between charger and power management chip, be provided with the first controlled switch, baseband processing chip comprises the first port, the first controlled switch comprises first end, the second end and the 3rd end, first end is connected with charger, the second end is connected with supply power voltage input, the 3rd end is connected with the first port, when baseband processing chip controls signal to the 3rd end by the first port output first, first end is connected with the second end, when baseband processing chip controls signal to the 3rd end by the first port output second, first end and the second end disconnect.
Wherein, between the cathode output end of external power supply and power management chip, be provided with the second controlled switch, baseband processing chip further comprises the second port, the second controlled switch comprises the 4th end, five terminal and the 6th end, the 4th end is connected with supply power voltage input, five terminal is connected with analog voltage input, the 6th end is connected with the second port, when baseband processing chip controls signal to the 6th end by the second port output the 3rd, the 4th end is connected with five terminal, when baseband processing chip controls signal to the 6th end by the second port output the 4th, the 4th end and five terminal disconnect.
Wherein, the first controlled switch is triode, and the transmitting of triode is first end very, and the current collection of triode is the second end very, and the base stage of triode is the 3rd end, and base stage and supply power voltage input are provided with current-limiting resistance; The second controlled switch is P type field effect transistor, and the transmitting of P type field effect transistor is the 4th end very, and the current collection of P type field effect transistor is five terminal very, and the base stage of P type field effect transistor is the 6th end.
Wherein, under calibration mode, the first port of baseband processing chip is exported the first control signal, the second port output the 4th control signal, under normal mode of operation, the first port of baseband processing chip is exported the second control signal, the second port output the 3rd control signal.
Wherein, power management chip and modulus conversion chip are integrated in baseband processing chip.
Wherein, mobile phone further comprises battery, and the positive pole of battery is connected with the cathode output end of analog voltage input and external power supply respectively, and the negative pole of battery is connected with earth terminal with the cathode output end of external power supply respectively.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of voltage calibration method of mobile phone is provided, comprises: from the first voltage source, receive independently-powered voltage; From second voltage source, receive the analog voltage with predetermined value, analog voltage is converted to digital voltage, according to analog voltage and digital voltage, obtain the transformational relation of surveying between digital voltage and analog voltage to be measured.
The invention has the beneficial effects as follows: the situation that is different from prior art, disclosed mobile phone and voltage calibration method thereof can provide analog voltage and independently-powered voltage by the voltage source by different when calibration, thereby can make mobile phone can carry out accurate voltage calibration.
Accompanying drawing explanation
Fig. 1 is according to the electrical block diagram of the mobile phone of first embodiment of the invention;
Fig. 2 is according to the workflow diagram of the voltage calibration method of the mobile phone of first embodiment of the invention;
Fig. 3 is according to the electrical block diagram of the mobile phone of second embodiment of the invention;
Fig. 4 is according to the electrical block diagram of the mobile phone of third embodiment of the invention.
Embodiment
First refer to Fig. 1, Fig. 1 is according to the electrical block diagram of the mobile phone of first embodiment of the invention.
As shown in Figure 1, according to the mobile phone of the first embodiment of the present invention, comprise modulus conversion chip 11, baseband processing chip 12 and power management chip 13.
Wherein, modulus conversion chip 11 comprises analog voltage input 101, and it receives the analog voltage with predetermined value by analog voltage input 101, and modulus conversion chip 11 is converted to digital voltage by analog voltage.Baseband processing chip 12 obtains the transformational relation between digital voltage and analog voltage according to this analog voltage and this digital voltage.Power management chip 13 comprises supply power voltage input 103, by supply power voltage input 103, receives independently-powered voltage, thinks modulus conversion chip 11 and baseband processing chip 12 power supplies.
It should be noted that above-mentioned analog voltage and independently-powered voltage are provided by different voltage sources.
Refer to Fig. 2, Fig. 2 is according to the workflow diagram of the voltage calibration method of the mobile phone of first embodiment of the invention.
As shown in Figure 2, the voltage calibration method of disclosed mobile phone comprises the steps:
Step 201, receives independently-powered voltage from the first voltage source.
Step 202, receives the analog voltage with predetermined value from second voltage source, analog voltage is converted to digital voltage.
Step 203, obtains according to analog voltage and digital voltage the transformational relation of surveying between digital voltage and analog voltage to be measured.
Above-mentioned step 201 can be carried out by power management chip 13, and step 202 can be carried out by modulus conversion chip 11, and step 203 can be carried out by baseband processing chip 12.
It should be noted that in a preferred embodiment, voltage source can comprise charger and external power supply, and therefore, the first voltage source can be charger, and second voltage source can be external power supply.Analog voltage output can be connected with external power supply, modulus conversion chip 11 receives the analog voltage with predetermined value from external power supply by analog voltage output, supply power voltage input 103 is connected with charger, and power management chip 13 receives independently-powered voltage by supply power voltage input 103 from charger.
In step 203, modulus conversion chip 11 can receive the first analog voltage V with predetermined value by analog voltage input 101
1, and by the first analog voltage V
1be converted to the first digital voltage D
1, by analog voltage input 101, receive the second analog voltage V with predetermined value
2, and by the first analog voltage V
2be converted to the first digital voltage D
2, and, set D
xfor the digital voltage of survey that modulus conversion chip 11 obtains, V
xfor surveying the actual corresponding analog voltage to be measured of digital voltage, according to linear relationship, the input and output of modulus conversion chip 11 should meet following equation:
Arrangement can obtain:
Therefore, baseband processing chip 12 obtains the transformational relation between digital voltage and analog voltage according to formula (2).
It should be noted that in actual measurement, can preferably set V
2for 4.2V, set V
1for 3.2V, make V
2-V
1difference be 1V so that computing is more easy.
Therefore, in the present embodiment, because mobile phone provides analog voltage and independently-powered voltage by the voltage source by different when carrying out voltage calibration, thereby can make mobile phone can carry out accurate voltage calibration.
Refer to Fig. 3, Fig. 3 is according to the electrical block diagram of the mobile phone of second embodiment of the invention.
As shown in Figure 3, the difference of second embodiment of the invention and first embodiment of the invention is, in the second embodiment of the present invention, more set up the first controlled switch 16 and the second controlled switch 17, mobile phone can be switched between calibration mode and normal mode of operation.
Wherein, the first controlled switch 16 is arranged between charger 14 and power management chip 13, baseband processing chip 12 comprises the first port 121, the first controlled switch comprises first end 161, the second end 162 and the 3rd end 163, first end 161 is connected with charger 14, the second end 162 is connected with supply power voltage input 103, the 3rd end 163 is connected with the first port 121, when baseband processing chip 12 controls signal to the 3rd end 163 by the first port 121 outputs first, first end 161 is connected with the second end 162, when baseband processing chip 12 controls signal to the 3rd end 163 by the first port 121 outputs second, first end 161 and the second end 162 disconnect.
The second controlled switch 17 is arranged between the cathode output end and power management chip 13 of external power supply 15, baseband processing chip 12 further comprises the second port one 22, the second controlled switch 17 comprises the 4th end 171, five terminal 172 and the 6th end 173, the 4th end 171 is connected with supply power voltage input 103, five terminal 172 is connected with analog voltage input 101, the 6th end 173 is connected with the second port one 22, when baseband processing chip 12 controls signal to the 6th end 173 by the second port one 22 outputs the 3rd, the 4th end 171 is connected with five terminal 172, when baseband processing chip 12 controls signal to the 6th end 173 by the second port one 22 outputs the 4th, the 4th end 171 and five terminal 172 disconnect.
Wherein, under calibration mode, first port 121 output the first control signals of baseband processing chip 12, first end 161 is connected with the second end 162, the second port one 22 output the 4th control signals, the 4th end 171 and five terminal 172 disconnect, now, the independently-powered voltage that charger 14 provides inputs to power management chip 13, and external power supply 15 provides analog voltage to modulus conversion chip 11.
Under normal mode of operation, first port 121 output the second control signals of baseband processing chip 12, first end 161 and the second end 162 disconnect, the second port one 22 output the 3rd control signals, the 4th end 171 is connected with five terminal 172, now, the analog voltage that external power supply 15 provides inputs to power management chip 13 and modulus conversion chip 11 simultaneously.Owing to having got above-mentioned formula (2) under calibration mode, therefore, under normal mode of operation, the numerical value that baseband processing chip 12 obtains according to formula (2) is the accurate magnitude of voltage of the analog voltage input 101 at modulus conversion chip 11.
Due under calibration mode, by 14 pairs of power management chips 13 of charger, powered, by external power supply 15, provide the analog voltage with predetermined value for modulus conversion chip 11, thereby avoided only utilizing a voltage source to power management chip 13 and modulus conversion chip 11, to provide the situation of voltage to occur simultaneously, can avoid pressure drop loss, and guarantee to enter when calibration mode, the analog voltage that inputs to analog voltage input 101 can not diminish.
Please with further reference to Fig. 3, in Fig. 3, disclosed mobile phone further comprises battery 18, external power supply further comprises cathode output end and cathode output end, the positive pole of battery 18 is connected with the cathode output end of analog voltage input 101 and external power supply respectively, and the negative pole of battery 18 is connected with earth terminal with the cathode output end of external power supply.
Refer to Fig. 4, Fig. 4 is according to the electrical block diagram of the mobile phone of third embodiment of the invention.
As shown in Figure 4, in third embodiment of the invention, power management chip 13 and modulus conversion chip 11 are all integrated in that in baseband processing chip 30, (wherein integrated chip technology is existing common technology, in this, do not repeat), after integrated, the universal input and output port IO1 of baseband processing chip 30 and IO2, can be respectively as the first port 121 in above-described embodiment and the second port one 22; The supply voltage input port VDD of baseband processing chip 12, as the supply voltage input 103 of the power management chip 13 in above-described embodiment; The analog voltage input mouth VBAT of baseband processing chip 12 can be used as the analog voltage input 101 in the modulus conversion chip 11 in above-described embodiment.
And in the present embodiment, the first controlled switch 36 of mentioning in above embodiment can be preferably triode, the transmitting of triode is the first end 361 of the first controlled switch 36 very, and current collection is the second end 362 very, and base stage is the 3rd end 363.As previously mentioned, first end 361 is connected with charger 34, the second end 362 be connected with supply voltage input port VDD and the second end 362 and supply voltage input port VDD between also comprise that current-limiting resistance 38, the three ends 363 are connected with universal input and output port IO1.
And the second controlled switch 37 can be preferably P type field effect transistor, the source electrode of P type field effect transistor is the 4th end 371 of the second controlled switch 37, and drain electrode is five terminal 372, and grid is the 6th end 373.As previously mentioned, the 4th end 371 is connected with supply voltage input port VDD, and five terminal 372 is connected with the cathode output end of external power supply 35 with analog voltage input mouth VBAT respectively, and the 6th end 373 is connected with universal input and output port IO2.
Wherein, baseband processing chip 30 utilizes universal input and output port IO1 and IO2 output high level or low level control signal to control the opening and closing of triode and P type field effect transistor, thereby the mobile phone that the present embodiment discloses can be switched between calibration mode and normal mode of operation.
Particularly, universal input and output port IO1 output high level signal can be set, source electrode and the drain electrode of triode 36 are communicated with, universal input and output port IO2 output low level signal is set, P type field effect transistor source electrode and drain electrode are disconnected, guaranteed that the electric current that external power supply 35 enters supply voltage input port VDD is 0, avoided pressure drop loss, the analog voltage that assurance inputs to analog voltage input mouth VBAT can not diminish, thereby enters calibration mode.
And, universal input and output port IO1 output low level signal can be set, the source electrode of triode 36 and drain electrode are disconnected, universal input and output port IO2 output high level signal is set, P type field effect transistor source electrode and drain electrode are communicated with, thereby enter normal mode of operation.
Please further consult Fig. 4, disclosed mobile phone further comprises battery 401, external power supply 35 further comprises cathode output end and cathode output end, the positive pole of battery 401 is connected with the cathode output end of external power supply 35, and the negative pole of battery 401 is connected with earth terminal with the cathode output end of external power supply.
Therefore, disclosed mobile phone and voltage calibration method thereof can provide analog voltage and independently-powered voltage by the voltage source by different when calibration, thereby can make mobile phone can carry out accurate voltage calibration.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a mobile phone, is characterized in that, comprising:
Modulus conversion chip, comprises analog voltage input, receives the analog voltage with predetermined value by described analog voltage input, and described modulus conversion chip is converted to digital voltage by described analog voltage;
Baseband processing chip, obtains according to described analog voltage and described digital voltage the transformational relation of surveying between digital voltage and analog voltage to be measured;
Power management chip, comprises supply power voltage input, by described supply power voltage input, receives independently-powered voltage, thinks described modulus conversion chip and the power supply of described baseband processing chip;
Wherein, described analog voltage and described independently-powered voltage are provided by different voltage sources; Described voltage source comprises charger and external power supply, described analog voltage input is connected with the cathode output end of described external power supply, described modulus conversion chip receives the described analog voltage with predetermined value from described external power supply by described analog voltage input, described supply power voltage input is connected with described charger, and described power management chip receives described independently-powered voltage by described supply power voltage input from described charger;
Between described charger and described power management chip, be provided with the first controlled switch, described baseband processing chip comprises the first port, described the first controlled switch comprises first end, the second end and the 3rd end, described first end is connected with described charger, described the second end is connected with described supply power voltage input, described the 3rd end is connected with described the first port, when described baseband processing chip controls signal to described the 3rd end by described the first port output first, described first end is connected with described the second end, when described baseband processing chip controls signal to described the 3rd end by described the first port output second, described first end and described the second end disconnect,
Between the cathode output end of described external power supply and described power management chip, be provided with the second controlled switch, described baseband processing chip further comprises the second port, described the second controlled switch comprises the 4th end, five terminal and the 6th end, described the 4th end is connected with described supply power voltage input, described five terminal is connected with described analog voltage input, described the 6th end is connected with described the second port, when described baseband processing chip controls signal to described the 6th end by described the second port output the 3rd, described the 4th end is connected with described five terminal, when described baseband processing chip controls signal to described the 6th end by described the second port output the 4th, described the 4th end and described five terminal disconnect,
Described the first controlled switch is triode, the very described first end of the transmitting of described triode, very described the second end of the current collection of described triode, the base stage of described triode is described the 3rd end, described base stage and described supply power voltage input are provided with current-limiting resistance; Described the second controlled switch is P type field effect transistor, and the source electrode of described P type field effect transistor is described the 4th end, and the drain electrode of described P type field effect transistor is described five terminal, and the grid of described P type field effect transistor is described the 6th end;
Described power management chip and described modulus conversion chip are integrated in described baseband processing chip;
The universal input and output port IO1 of baseband processing chip and IO2, respectively as described the first port and the second port; The supply voltage input port VDD of baseband processing chip, as the supply voltage input of described power management chip; The analog voltage input mouth of baseband processing chip is as the analog voltage input in described modulus conversion chip;
Universal input and output port IO1 output high level signal is set, source electrode and the drain electrode of triode are communicated with, universal input and output port IO2 output low level signal is set, P type field effect transistor source electrode and drain electrode are disconnected, guaranteed that the electric current that external power supply enters supply voltage input port VDD is 0, avoided pressure drop loss, guaranteed that the analog voltage that inputs to analog voltage input mouth VBAT can not diminish, thereby enter calibration mode.
2. mobile phone according to claim 1, is characterized in that, described modulus conversion chip receives the first analog voltage V with predetermined value by described analog voltage input
1, and by described the first analog voltage V
1be converted to the first digital voltage D
1, by described analog voltage input, receive the second analog voltage V with predetermined value
2, and by described the first analog voltage V
2be converted to the first digital voltage D
2, described baseband processing chip obtains according to following formula the transformational relation of surveying between digital voltage and analog voltage to be measured:
Wherein, D
xdescribed digital voltage, the V of having surveyed obtaining for described modulus conversion chip
xfor the described actual corresponding analog voltage described to be measured of digital voltage of having surveyed.
3. mobile phone according to claim 1, it is characterized in that, under calibration mode, described first port of described baseband processing chip is exported the first control signal, described the second port output the 4th control signal, under normal mode of operation, described first port of described baseband processing chip is exported the second control signal, described the second port output the 3rd control signal.
4. mobile phone according to claim 1, it is characterized in that, described mobile phone further comprises battery, the positive pole of described battery is connected with the cathode output end of described analog voltage input and described external power supply respectively, and the negative pole of described battery is connected with earth terminal with the cathode output end of described external power supply.
5. a voltage calibration method for mobile phone, is characterized in that, comprising:
From the first voltage source, receive independently-powered voltage;
From second voltage source, receive the analog voltage with predetermined value, described analog voltage is converted to digital voltage;
According to described analog voltage and described digital voltage, obtain the transformational relation of surveying between digital voltage and analog voltage to be measured;
Wherein, described analog voltage and described independently-powered voltage are provided by different voltage sources; Described voltage source comprises charger and external power supply, and the first voltage source is charger, and second voltage source is external power supply; Described analog voltage input is connected with the cathode output end of described external power supply, modulus conversion chip receives the described analog voltage with predetermined value from described external power supply by described analog voltage input, described supply power voltage input is connected with described charger, and power management chip receives described independently-powered voltage by described supply power voltage input from described charger;
Between described charger and described power management chip, be provided with the first controlled switch, baseband processing chip comprises the first port, described the first controlled switch comprises first end, the second end and the 3rd end, described first end is connected with described charger, described the second end is connected with described supply power voltage input, described the 3rd end is connected with described the first port, when described baseband processing chip controls signal to described the 3rd end by described the first port output first, described first end is connected with described the second end, when described baseband processing chip controls signal to described the 3rd end by described the first port output second, described first end and described the second end disconnect,
Between the cathode output end of described external power supply and described power management chip, be provided with the second controlled switch, described baseband processing chip further comprises the second port, described the second controlled switch comprises the 4th end, five terminal and the 6th end, described the 4th end is connected with described supply power voltage input, described five terminal is connected with described analog voltage input, described the 6th end is connected with described the second port, when described baseband processing chip controls signal to described the 6th end by described the second port output the 3rd, described the 4th end is connected with described five terminal, when described baseband processing chip controls signal to described the 6th end by described the second port output the 4th, described the 4th end and described five terminal disconnect,
Described the first controlled switch is triode, the very described first end of the transmitting of described triode, very described the second end of the current collection of described triode, the base stage of described triode is described the 3rd end, described base stage and described supply power voltage input are provided with current-limiting resistance; Described the second controlled switch is P type field effect transistor, and the source electrode of described P type field effect transistor is described the 4th end, and the drain electrode of described P type field effect transistor is described five terminal, and the grid of described P type field effect transistor is described the 6th end;
Described power management chip and described modulus conversion chip are integrated in described baseband processing chip;
The universal input and output port IO1 of baseband processing chip and IO2, respectively as described the first port and the second port; The supply voltage input port VDD of baseband processing chip, as the supply voltage input of described power management chip; The analog voltage input mouth of baseband processing chip is as the analog voltage input in described modulus conversion chip;
Universal input and output port IO1 output high level signal is set, source electrode and the drain electrode of triode are communicated with, universal input and output port IO2 output low level signal is set, P type field effect transistor source electrode and drain electrode are disconnected, guaranteed that the electric current that external power supply enters supply voltage input port VDD is 0, avoided pressure drop loss, guaranteed that the analog voltage that inputs to analog voltage input mouth VBAT can not diminish, thereby enter calibration mode.
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