CN201237635Y - Battery voltage detector and mobile terminal with the same - Google Patents
Battery voltage detector and mobile terminal with the same Download PDFInfo
- Publication number
- CN201237635Y CN201237635Y CNU2008201275001U CN200820127500U CN201237635Y CN 201237635 Y CN201237635 Y CN 201237635Y CN U2008201275001 U CNU2008201275001 U CN U2008201275001U CN 200820127500 U CN200820127500 U CN 200820127500U CN 201237635 Y CN201237635 Y CN 201237635Y
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- battery
- battery voltage
- detection module
- port
- voltage
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Abstract
The utility model discloses a battery voltage detecting device and a mobile terminal, relates to a mobile terminal, in particular to a battery voltage detecting device of the mobile terminal, which can solves the problem that in the prior art, the ADC battery voltage detection is easy to cause misjudgment. The battery voltage detecting device comprises a filter circuit which is connected between a battery port and a detecting module and is used for filtering high-frequency components in battery voltage signals output by the battery port, and the detecting module which is used for carrying out detection to the battery voltage signals which is filtered by the filter circuit. The mobile terminal comprises the filter circuit which is connected between the battery port and a voltage-detecting module and is used for filtering high-frequency components in battery voltage signals output by the battery port, and the voltage-detecting module which is used for carrying out detection to the battery voltage signals which is filtered by the filter circuit. The utility model is applicable to real-time detection of the battery voltage in a mobile phone with a GSM system.
Description
Technical field
The utility model relates to a kind of portable terminal, relates in particular to the battery voltage detector in the portable terminal.
Background technology
GSM (global system for mobile communications) mobile phone has obtained using widely at present, has opened up a very ripe market, yet for the GSM mobile handset designer, the frequency interferences of 217Hz is a great problem in the exploitation all the time.The frequency interferences of 217Hz is to produce like this: because GSM mobile handset adopts tdma, therefore when connecting phone, radio frequency sending set is opened radio frequency sending set with the frequency of 217Hz and is come transmission information; Because the GSM mobile handset emissive power is very big, can reach more than the 1.5W, a large amount of power consumptions of moment this moment cause the significantly drop-down of cell voltage moment.And owing to mobile phone will detect cell voltage in real time, in this case, mobile phone all can cause periodic voltage drop-down and the detection of battery of mobile phone voltage is produced very big influence of fluctuations owing to the high-power emission of radio frequency sending set when connecting and after connecting; If when the battery voltage detection sampled point of mobile phone just in time is positioned on the drop-down point of voltage of 217Hz, may makes mobile phone think that current cell voltage is low excessively by mistake, thereby start shutdown programm in advance, shorten the whole stand-by time of mobile phone greatly.
Conventional cell voltage ADC (analog to digital conversion) testing circuit directly inserts battery port the power management module part of chip for cell phone, by ADC conversion the current magnitude of voltage of mobile phone is converted to input handset chip after the digital signal, and the voltage digital signal that obtains is judged by chip for cell phone.If described voltage digital signal is lower than the automatic shutdown voltage limit of mobile phone, then chip for cell phone can be controlled the mobile phone processing of shutting down.As shown in Figure 1, dotted line is represented the detection position of ADC voltage detecting, just detect because the utmost point low signal that the frequency emission of mobile phone 217Hz causes then can be judged to the mistake that chip for cell phone report this utmost point low-voltage and make chip for cell phone make shutdown ahead of time at t1 moment ADC voltage detecting point.
State in realization in the process of battery voltage detection, the inventor finds that there are the following problems at least in the prior art:
When GSM mobile handset is in the communication process, because the transmission frequency of 217Hz is to the periodicity influence of the cell voltage of mobile phone, existing ADC voltage detecting is subjected to the interference of high-frequency signal easily and detected low-voltage signal is reported chip for cell phone, makes mobile phone shut down in advance.
The utility model content
The utility model provides a kind of battery voltage detector, can solve the problem that the interference that is subjected to high-frequency signal in the existing ADC voltage detecting process easily causes erroneous judgement.
For achieving the above object, the utility model adopts following technical scheme:
A kind of battery voltage detector comprises:
Filtering circuit is connected between battery port and the detection module, is used for the radio-frequency component of the battery voltage signal of the described battery port output of filtering;
Detection module is used for being detected by the filtered battery voltage signal of described filtering circuit.
The filtering circuit of the radio-frequency component of the utility model battery voltage detector by between battery port and detection module, inserting the battery voltage signal be used for the described battery port output of filtering, can effectively suppress the low pressure undesired signal in the cell output voltage signal, improve ADC voltage detecting precision.
The utility model also provides a kind of portable terminal with said apparatus, can solve the problem that the interference that is subjected to high-frequency signal in the existing ADC voltage detecting process easily causes erroneous judgement.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of portable terminal with above-mentioned battery voltage detector comprises:
Filtering circuit is connected between battery port and the voltage detection module, is used for the radio-frequency component of the battery voltage signal of the described battery port output of filtering;
Voltage detection module is used for being detected by the filtered battery voltage signal of described filtering circuit.
The portable terminal that the utility model provides, by the filtering circuit that is connected between battery port and the voltage detection module is set in portable terminal, the radio-frequency component that is used for the battery voltage signal of the described battery port output of filtering, thereby realized low pressure undesired signal in the voltage signal of effective inhibition battery port output improving ADC voltage detecting precision.
Description of drawings
The GSM mobile handset cell voltage oscillogram that Fig. 1 obtains for prior art ADC voltage detecting;
Fig. 2 is the synoptic diagram of the utility model one embodiment GSM mobile handset battery voltage detector;
Fig. 3 is the synoptic diagram of the another embodiment GSM mobile handset of the utility model battery voltage detector;
Fig. 4 detects the cell voltage oscillogram that obtains for the utility model embodiment GSM mobile handset battery voltage detector;
Fig. 5 is the synoptic diagram of the utility model embodiment GSM mobile handset.
Embodiment
The utility model provides a kind of battery voltage detector and portable terminal, can solve the problem that the interference that is subjected to high-frequency signal in the existing ADC voltage detecting process easily causes erroneous judgement.Below in conjunction with accompanying drawing the utility model embodiment is described in detail.Should be clear and definite, following examples only are used to illustrate the utility model, limit protection domain of the present utility model and be not used in.
Be example with the GSM mobile handset battery voltage detector below, the utility model embodiment battery voltage detector is elaborated.
As shown in Figure 2, the utility model embodiment GSM mobile handset battery voltage detector comprises:
With the frequency emissioning signal of 217Hz, power is bigger in conversation for GSM mobile handset, and GSM mobile handset employing tdma transmission signal, and battery of mobile phone voltage can be subjected to periodic drop-down influence because of periodic signal sends.Therefore have periodic low-voltage signal from the voltage signal of cell voltage port A output, another characteristics of these signals are to be high-frequency signal with respect to normal signal.Filtering circuit 100 is used for the high frequency low voltage signal in the battery voltage signal that filtering battery port A exports.
According to RC filtering circuit formula, filtering circuit 100 allows peak signal frequency f=1/ (2 π RC) passed through, therefore should be as far as possible the product of the capacitance of the resistance R of shunt resistance R1 and capacitor C is got bigger, can reach preferable filter effect.In the present embodiment the capacitor C size is taken as 0.1u, but protection domain of the present utility model is not limited thereto.In order to realize better filter effect, also can or be connected in parallel and carry out filtering in addition a plurality of capacitances in series.
As shown in Figure 3, in order to realize better filter effect, the utility model embodiment GSM mobile handset battery voltage detector preferably also comprises: be connected in the divider resistance R2 between described battery port A and the described filtering circuit 100.
Divider resistance R2 and shunt resistance R1 combination can realize the dividing potential drop to the battery voltage signal of exporting from battery port A.The value of divider resistance R2 and shunt resistance R1 should be got greatlyyer guaranteeing to drive as far as possible under the prerequisite of detection module 200, can reduce power consumption and improve filter effect.
At detection module described in the utility model preferred embodiment 200 is the ADC voltage detection module.Be illustrated in figure 2 as the detected battery of mobile phone voltage oscillogram of the utility model embodiment GSM mobile handset battery voltage detector, dotted line is represented the detection position of ADC voltage detecting, since filtering undesired signal, thereby waveform voltage signal is stable, and is constantly very approaching at the detected voltage signal of moment t1 and other.
The utility model embodiment GSM mobile handset battery voltage detector is by inserting the undesired signal that filtering circuit is used for filtering battery of mobile phone voltage signal between battery of mobile phone port and ADC voltage detection module, and between filtering circuit and described battery of mobile phone port, insert divider resistance and reduce power consumption, can make the ADC voltage detection module effectively get rid of GSM mobile handset in communication process because the drop-down battery voltage signal of periodicity that 217Hz signal emission causes, thereby realized in the communication process of GSM mobile handset still exactly the detection of handset battery voltage signal and reported.The utility model embodiment has also reduced the power consumption of original ADC voltage detecting circuit in addition.
The utility model embodiment also provides a kind of portable terminal, can solve the problem that the interference that is subjected to high-frequency signal in the existing ADC voltage detecting process easily causes erroneous judgement.
Be example below with the GSM mobile handset, the utility model embodiment portable terminal is elaborated.Should be clear and definite, below only be for embodiment of the present utility model is described, protection domain of the present utility model is not limited thereto.
As shown in Figure 5, a kind of GSM mobile handset comprises:
The utility model embodiment can adopt filtering circuit shown in Figure 2 100, and described voltage detection module also can adopt the ADC voltage detection module.In order to obtain better filter effect and to reduce power consumption, as shown in Figure 5, between battery of mobile phone port and filtering circuit, can insert divider resistance R2.
The portable terminal that the utility model provides, by the filtering circuit that is connected between battery port and the ADC voltage detection module is set in portable terminal, the radio-frequency component that is used for the battery voltage signal of the described battery port output of filtering, can effectively suppress the low pressure undesired signal in the voltage signal of battery port output, thereby realized in the communication process of GSM standard mobile phone still exactly the detection of handset battery voltage signal and report, improved ADC voltage detecting precision.Add divider resistance between filtering circuit and the battery port in addition, realized low-power consumption and better filter effect.
The above; it only is embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (10)
1, a kind of battery voltage detector is characterized in that, comprising:
Filtering circuit is connected between battery port and the detection module, is used for the radio-frequency component of the battery voltage signal of the described battery port output of filtering;
Detection module is used for being detected by the filtered battery voltage signal of described filtering circuit.
2, battery voltage detector as claimed in claim 1 is characterized in that, described filtering circuit comprises electric capacity and the shunt resistance in parallel with described electric capacity;
Described electric capacity is connected between described battery port and the described detection module another common end grounding with a common port after shunt resistance is in parallel.
3, battery voltage detector as claimed in claim 2 is characterized in that, also comprises the divider resistance that is connected between described battery port and the described filtering circuit.
4, battery voltage detector as claimed in claim 3 is characterized in that, described detection module is the ADC voltage detection module.
5, battery voltage detector as claimed in claim 4 is characterized in that, described capacitance size is 0.1u.
6, a kind of portable terminal is characterized in that, comprising:
Filtering circuit is connected between battery port and the voltage detection module, is used for the radio-frequency component of the battery voltage signal of the described battery port output of filtering;
Voltage detection module is used for being detected by the filtered battery voltage signal of described filtering circuit.
7, portable terminal as claimed in claim 6 is characterized in that, described filtering circuit comprises electric capacity and the shunt resistance in parallel with described electric capacity;
Described electric capacity is connected between described battery port and the described voltage detection module another common end grounding with a common port after shunt resistance is in parallel.
8, portable terminal as claimed in claim 7 is characterized in that, also comprises the divider resistance that is connected between described battery port and the described filtering circuit.
9, portable terminal as claimed in claim 8 is characterized in that, described voltage detection module is the ADC voltage detection module.
As each described portable terminal of claim 6 to 9, it is characterized in that 10, described portable terminal is the GSM standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201275001U CN201237635Y (en) | 2008-07-24 | 2008-07-24 | Battery voltage detector and mobile terminal with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201275001U CN201237635Y (en) | 2008-07-24 | 2008-07-24 | Battery voltage detector and mobile terminal with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201237635Y true CN201237635Y (en) | 2009-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201275001U Expired - Fee Related CN201237635Y (en) | 2008-07-24 | 2008-07-24 | Battery voltage detector and mobile terminal with the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201237635Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570382A (en) * | 2010-12-15 | 2012-07-11 | 沈阳新邮通信设备有限公司 | Starting up protection device |
| CN101827166B (en) * | 2010-01-19 | 2013-03-13 | 青岛海信移动通信技术股份有限公司 | Low-current alarming circuit and intelligent mobile communication equipment with same |
| WO2014117340A1 (en) * | 2013-01-30 | 2014-08-07 | St-Ericsson Sa | Method and device for measuring state of charge of mobile terminal |
| CN106018914A (en) * | 2015-03-31 | 2016-10-12 | 株式会社京滨 | Battery voltage detection device |
-
2008
- 2008-07-24 CN CNU2008201275001U patent/CN201237635Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101827166B (en) * | 2010-01-19 | 2013-03-13 | 青岛海信移动通信技术股份有限公司 | Low-current alarming circuit and intelligent mobile communication equipment with same |
| CN102570382A (en) * | 2010-12-15 | 2012-07-11 | 沈阳新邮通信设备有限公司 | Starting up protection device |
| CN102570382B (en) * | 2010-12-15 | 2016-03-23 | 沈阳新邮通信设备有限公司 | Starting up protection device |
| WO2014117340A1 (en) * | 2013-01-30 | 2014-08-07 | St-Ericsson Sa | Method and device for measuring state of charge of mobile terminal |
| CN105283772A (en) * | 2013-01-30 | 2016-01-27 | 意法-爱立信有限公司 | Method and device for measuring state of charge of mobile terminal |
| CN106018914A (en) * | 2015-03-31 | 2016-10-12 | 株式会社京滨 | Battery voltage detection device |
| US10006966B2 (en) | 2015-03-31 | 2018-06-26 | Keihin Corporation | Battery voltage detection device |
| CN106018914B (en) * | 2015-03-31 | 2019-01-04 | 株式会社京滨 | Battery voltage detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 Termination date: 20110724 |