CN103580621A - Electronic device and method for regulating output power thereof - Google Patents
Electronic device and method for regulating output power thereof Download PDFInfo
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- CN103580621A CN103580621A CN201210251159.1A CN201210251159A CN103580621A CN 103580621 A CN103580621 A CN 103580621A CN 201210251159 A CN201210251159 A CN 201210251159A CN 103580621 A CN103580621 A CN 103580621A
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Abstract
The invention relates to an electronic device which comprises a central processor, an adaptor, a power amplifier and an earphone jack, wherein the power amplifier is connected with the adaptor, and the earphone jack is connected with the adaptor and the central processor. The central processor sends the voltage to the earphone jack through a current limit resistor by means of an input/ output interface detection circuit; the central processor calculates an impedance value of an earphone according to the current flowing through the current limit resistor, and the adaptor is switched to the power amplifier through the control of a general purpose input/ output (GPIO) interface according to the impedance value of the earphone; the power amplifier regulates the output power according to the impedance value of the earphone and outputs signals to the earphone jack. The invention further provides a method for regulating the output power of the electronic device.
Description
Technical field
The present invention relates to a kind of electronic technology field, relate in particular to the method for the power output of a kind of electronic installation and adjustment electronic installation.
Background technology
The earphone impedance value of existing digital audio-visual equipment is not identical, generally between 16 ohm-600 ohm, when digital audio-visual products is when changing earphone, because digital audio-visual products is fixed by the power output of operational amplifier, and export suitable power cannot to the earphone of different capacity, cause volume too little and can not hear clearly or the too large and injury ear of volume.Therefore need to provide a kind of can be according to the digital audio-visual equipment of the output different capacity of different earphones.
Summary of the invention
The object of the present invention is to provide the method for the power output of a kind of electronic installation and adjustment electronic installation, to adjust the power output of electronic installation.
A kind of electronic installation, comprise central processing unit, transducer, the power amplifier being connected with transducer, the earphone interface being connected with transducer and central processing unit, wherein central processing unit by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface; Central processing unit is according to the resistance value of Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer and switch to power amplifier; Power amplifier is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface.
Further, above-mentioned electronic installation, also comprises the digital to analog converter being connected with central processing unit, and the digital audio and video signals of central processing unit output is changed into analog signal.
Further, above-mentioned electronic installation, also comprises the operational amplifier being connected with digital to analog converter, and the analog signal of digital to analog converter output is carried out to elementary amplification.
Further, above-mentioned electronic installation, also comprises the power amplifier being connected with operational amplifier and transducer, and the analog signal of operational amplifier output is carried out to secondary amplification.
Further, above-mentioned electronic installation, also comprises and central processing unit, digital to analog converter, operational amplifier, and the power supervisor of power amplifier connection, and to central processing unit, digital to analog converter, operational amplifier, and power amplifier provides power supply.
The present invention also provides a kind of method of adjusting the power output of electronic installation, comprising: central processing unit by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface; Central processing unit is according to the resistance value of Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer and switch to power amplifier; Power amplifier is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface.
Further, the method for the power output of above-mentioned adjustment electronic installation, also comprises: central processing unit detects earphone and inserts.
Further, the method for the power output of above-mentioned adjustment electronic installation, also comprises: central processing unit is sent out control signal to transducer by GPIO, and transducer receives after control signal, switches to earphone impedance detecting pattern.
The present invention can logarithmic code audio-visual equipment etc. the earphone impedance value of electronic installation detect, and by power amplifier according to the anti-adjustment power output of earphone resistance detecting.
Accompanying drawing explanation
For ease of explanation, the present invention is described in detail by following preferred embodiment and accompanying drawing.
Figure 1 shows that the module map of electronic installation of the present invention;
Fig. 2 is the flow chart that the present invention adjusts the method for electronic installation power output.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.
Figure 1 shows that the module map of electronic installation of the present invention;
Electronic installation comprises central processing unit 101, power supervisor 102, memory 103, digital to analog converter 104, operational amplifier 106, transducer 107, power amplifier 108, earphone interface 109.Electronic installation can be digital audio-visual equipment.
Wherein, power amplifier 108 is connected with transducer 107, and earphone interface 109 is connected with transducer 107 and central processing unit 101, and memory 103 is connected with central processing unit 101.
The operation principle of above-mentioned electronic installation is that central processing unit 101 detects earphone insertion; Central processing unit 101 is sent out control signal to transducer 104 by GPIO, and transducer 104 receives after control signal, switches to earphone impedance detecting pattern; Central processing unit 101 by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface 109; Central processing unit 101 is according to the resistance value of the Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer 104 and switch to power amplifier 108; Power amplifier 108 is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface 109.
Further, electronic installation also comprises the digital to analog converter 104 being connected with central processing unit 101, and the digital audio and video signals of central processing unit 101 outputs is changed into analog signal.
Further, electronic installation also comprises the operational amplifier 106 being connected with digital to analog converter 104, and the analog signal of digital to analog converter 104 outputs is carried out to elementary amplification.
Further, electronic installation also comprises the power amplifier 108 being connected with operational amplifier 106 and transducer 107, and the analog signal of operational amplifier 106 outputs is carried out to secondary amplification.
Further, electronic installation also comprises and central processing unit 101, digital to analog converter 104, operational amplifier 106, and the power supervisor 102 of power amplifier 108 connections, to central processing unit 101, digital to analog converter 104, operational amplifier 106, and power amplifier 108 provides power supply.
Fig. 2 is the flow chart that the present invention adjusts the method for electronic installation power output;
Step S201, central processing unit 101 detects earphone and inserts;
Step S202, central processing unit 101 is sent out control signal to transducer 104 by GPIO, and transducer 104 receives after control signal, switches to earphone impedance detecting pattern;
Step S203, central processing unit 101 by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface 109;
Step S204, central processing unit 101 is according to the resistance value of the Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer 104 and switch to power amplifier 108;
Step S205, power amplifier 108 is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface 109.
The present invention can logarithmic code audio-visual equipment etc. the earphone impedance value of electronic installation detect, and by power amplifier 108 according to the anti-adjustment power output of earphone resistance detecting.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. an electronic installation, is characterized in that, comprises central processing unit, transducer, the power amplifier being connected with transducer, and the earphone interface being connected with transducer and central processing unit, wherein:
Central processing unit by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface;
Central processing unit is according to the resistance value of Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer and switch to power amplifier;
Power amplifier is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface.
2. electronic installation as claimed in claim 1, is characterized in that, also comprises the digital to analog converter being connected with central processing unit, and the digital audio and video signals of central processing unit output is changed into analog signal.
3. electronic installation as claimed in claim 2, is characterized in that, also comprises the operational amplifier being connected with digital to analog converter, and the analog signal of digital to analog converter output is carried out to elementary amplification.
4. electronic installation as claimed in claim 3, is characterized in that, also comprises the power amplifier being connected with operational amplifier and transducer, and the analog signal of operational amplifier output is carried out to secondary amplification.
5. electronic installation as claimed in claim 4, it is characterized in that, also comprise and central processing unit, digital to analog converter, operational amplifier, and the power supervisor of power amplifier connection, to central processing unit, digital to analog converter, operational amplifier, and power amplifier provides power supply.
6. adjust a method for the power output of electronic installation, be applied to the electronic installation as described in claim 1 to 5 any one, it is characterized in that, comprising:
Central processing unit by input/output interface testing circuit send voltage through current-limiting resistance to earphone interface;
Central processing unit is according to the resistance value of Current calculation earphone of the current-limiting resistance of flowing through, and according to the resistance value of earphone, by GPIO interface, controls transducer and switch to power amplifier;
Power amplifier is according to the anti-adjustment power output of earphone resistance, and exports signal to earphone interface.
7. the method for the power output of adjustment electronic installation as claimed in claim 6, is characterized in that, also comprises:
Central processing unit detects earphone and inserts.
8. the method for the power output of adjustment electronic installation as claimed in claim 7, is characterized in that, also comprises:
Central processing unit is sent out control signal to transducer by GPIO, and transducer receives after control signal, switches to earphone impedance detecting pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251159.1A CN103580621A (en) | 2012-07-19 | 2012-07-19 | Electronic device and method for regulating output power thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210251159.1A CN103580621A (en) | 2012-07-19 | 2012-07-19 | Electronic device and method for regulating output power thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103580621A true CN103580621A (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210251159.1A Pending CN103580621A (en) | 2012-07-19 | 2012-07-19 | Electronic device and method for regulating output power thereof |
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| CN (1) | CN103580621A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105592379A (en) * | 2016-02-17 | 2016-05-18 | 惠州Tcl移动通信有限公司 | Earphone power supply control method, earphone power supply control system, and mobile terminal |
| WO2016145874A1 (en) * | 2015-09-21 | 2016-09-22 | 中兴通讯股份有限公司 | Output power control method and circuit |
-
2012
- 2012-07-19 CN CN201210251159.1A patent/CN103580621A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016145874A1 (en) * | 2015-09-21 | 2016-09-22 | 中兴通讯股份有限公司 | Output power control method and circuit |
| CN106550301A (en) * | 2015-09-21 | 2017-03-29 | 中兴通讯股份有限公司 | A kind of control method and circuit of earphone output |
| CN105592379A (en) * | 2016-02-17 | 2016-05-18 | 惠州Tcl移动通信有限公司 | Earphone power supply control method, earphone power supply control system, and mobile terminal |
| CN105592379B (en) * | 2016-02-17 | 2019-01-04 | 惠州Tcl移动通信有限公司 | A kind of control method, system and the mobile terminal of earphone power supply |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150924 Address after: 518000 areca road in Guangdong Province, Shenzhen Futian Free Trade Zone No. 6 Fuxing Building 4 floor Applicant after: Shenzhen Fuzhi Software Technology Co., Ltd. Address before: 518118 Guangdong city of Shenzhen province Pingshan North Zhu Lu Lan fuxingda Industrial Plant Factory No.1, No. two building a layer of a layer to three Applicant before: Foxda Technology Industrial (Shenzhen) Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140212 |