CN102543151A - MP3 player with headphone amplifier card capable of being replaced - Google Patents

MP3 player with headphone amplifier card capable of being replaced Download PDF

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Publication number
CN102543151A
CN102543151A CN2011104329048A CN201110432904A CN102543151A CN 102543151 A CN102543151 A CN 102543151A CN 2011104329048 A CN2011104329048 A CN 2011104329048A CN 201110432904 A CN201110432904 A CN 201110432904A CN 102543151 A CN102543151 A CN 102543151A
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CN
China
Prior art keywords
card
ear
player
circuit
headphone amplifier
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011104329048A
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Chinese (zh)
Inventor
边仿
Original Assignee
边仿
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 边仿 filed Critical 边仿
Priority to CN2011104329048A priority Critical patent/CN102543151A/en
Publication of CN102543151A publication Critical patent/CN102543151A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an MP3 player a headphone amplifier card capable of being replaced, which comprises an MP3 player body, a headphone jack and a circuit board. A headphone amplifier card placing cavity is arranged at the back of the MP3 player body and provided with a headphone amplifier card socket for inserting the headphone amplifier card. The circuit board is provided with an MP3 digital decoding circuit, the MP3 digital decoding circuit is provided with a microprocessor provided with a digital signal processor (PSP) decoding chip, the microprocessor is respectively connected with a synchronous dynamic random access memory (SDRAM), a liquid-crystal display (LCD) display driving module, a memory flash memory chip and a power supply battery special for an amplifier circuit, the microprocessor is connected with the headphone amplifier card socket and a circuit output socket through low-pass filters on a left analog-output sound track wire and a right analog-output sound track wire, the headphone amplifier card socket is connected with the power supply battery special for the amplifier circuit and connected with the headphone jack through the headphone amplifier card. The MP3 player with the headphone amplifier card capable of being replaced inserts headphone amplifier cards with different output impedances into the headphone amplifier card socket and connects headphones matched with the headphone amplifier cards so as to be capable of obtaining audio effects with different tone quality.

Description

A kind ofly can change the MP3 player that ear is put card
Technical field
The invention belongs to the electronic digital product technical field, relate to the carry-on player of a kind of MP3, be specifically related to a kind ofly can change the MP3 player that ear is put card.
Background technology
Carry-on MP3 player amplifying circuit all is to design on the wiring board of player the inside at present, and their output impedance mostly is 32 Ω, therefore the user is wanted that the sense of hearing of using different earphones to obtain different tonequality audios but can't realize.Especially wait some high-fidelities (Hi-Fi) earphone for picture " Sen Haisaier ", " visiing inferior power ", " AKG ", " iron triangle ", their impedance phase to all than higher, generally between 100~300 Ω, some in addition up to 600 Ω.Satisfying under the condition of identical volume, wanting to realize that with 32 common Ω impedances of MP3 player the required higher promotion voltage of high-fidelity (Hi-Fi) earphone is impossible especially.
The utility model content
The purpose of this invention is to provide a kind of MP3 player that can change earphone amplifying circuit card (the abbreviation ear is put card); The MP3 digital decoding circuit that it is provided with through the MP3 player; Can put card at the ear that ear is put on the card socket the different output impedance of pegging graft; Insert the earphone that is complementary in earphone jack again, just can obtain the sense of hearing of different tonequality audios, solved the not abundant problem of acoustical quality that existing MP3 player exists.
The technical scheme that the present invention adopted is; A kind ofly can change the MP3 player that ear is put card; Comprise MP3 player, earphone jack and wiring board, the described MP3 player back side is provided with ear and puts the card placed cavity, and ear is put the card placed cavity and is provided with the grafting ear and puts the ear of card and put the card socket; Described wiring board is provided with a MP3 digital decoding circuit; MP3 digital decoding circuit is by being provided with the microprocessor that the DSP decoding chip is housed; Microprocessor connects SDRAM random access memory, LCD display driver module, memory flash chip respectively; And amplifying circuit power source special battery; Microprocessor is put card socket and circuit accessory power outlet through the low-pass filter engaging lug on its simulation output left and right acoustic channels circuit road, and described ear is put the card socket and is connected with amplifying circuit power source special battery, and puts card through ear and be connected with earphone jack;
Described ear is put being defined as of pin that card and ear are put the card socket:
1~3:L_IN;4~6:GND;7~9:R_IN;10~18:GND;19~21:-5V?MAX?100mA;22~23:GND;24~26:+5V?MAX?100mA;27~28:+7.4V?MAX?100mA;29~30:-7.4V?MAX?100mA;34~35:L_OUT;36~37:GND;38~39:R_OUT;41~47:GND。
Of the present inventionly can change the MP3 player that ear is put card, its characteristic also is,
Described ear is put card for a plurality of, and each ear is put and is provided with the amplifying circuit that is fit to different tonequality earphones in the card.
Described power source special battery is 7.4 volts of lithium batteries.
The present invention can change the MP3 player of ear amplifying circuit card; Through the amplifying circuit that is provided with very wide range of linearity; Thereby also possessed the ear-phone function that can drive different impedances; The ear of putting on the card jack interface the different output impedance of coupling of pegging graft at ear is put card, inserts the earphone that is complementary in earphone jack again, just can obtain the sense of hearing of different tonequality audios through the tuning effect that ear is put card; Satisfied the special demands of different crowd fully, made different high-fidelity headphone acoustics profits manifest incisively and vividly MP3 player sound tonequality.
Description of drawings
Fig. 1 is the MP3 player structural representation that the present invention can change ear amplifying circuit card;
Fig. 2 is the MP3 player fundamental diagram that the present invention can change ear amplifying circuit card;
Fig. 3 a is that MP3 player ear of the present invention is put card socket deployed configuration and pin definition synoptic diagram;
Fig. 3 b and Fig. 3 c are that MP3 player ear of the present invention is put card pin definition synoptic diagram.
Among the figure, 1.MP3 player, 2. earphone jack, 3. amplifying circuit; 4. ear is put the card placed cavity, and 5. ear is put card, and 6. ear is put card socket, 7. microprocessor; 8.SDRAM random access memory, 9.LCD display driver module, 10. memory flash chip; 11. the power source special battery, 12. circuit accessory power outlets, 13. low-pass filters.
27-52 is that ear is put card A face pin pin position; 1-26 is that ear is put card B face pin pin position.
Embodiment
In conjunction with accompanying drawing and embodiment the present invention is elaborated.
A kind ofly can change the MP3 player that ear is put card, MP3 player 1, earphone jack 2 and the wiring board of comprising as depicted in figs. 1 and 2, described MP3 player 1 back side is provided with ear and puts card placed cavity 4, and ear is put card placed cavity 4 and is provided with the grafting ear and puts the ear of card 5 and put card socket 6; Described wiring board is provided with a MP3 digital decoding circuit 3; MP3 digital decoding circuit is by being provided with the microprocessor 7 that the DSP decoding chip is housed; Microprocessor 7 connects SDRAM random access memory 8, LCD display driver module 9, memory flash chip 10 respectively; And amplifying circuit power source special battery 11; Microprocessor 7 is put card socket 6 and circuit accessory power outlet 12 through low-pass filter 13 engaging lugs on its simulation output left and right acoustic channels circuit road, and described ear is put card socket 6 and is connected with amplifying circuit power source special battery 11, and puts card 5 through ear and be connected with earphone jack 2;
Ear of the present invention is put being defined as of pin that card 5 and ear are put card socket 6:
1~3:L_IN;4~6:GND;7~9:R_IN;10~18:GND;19~21:-5V?MAX?100mA;22~23:GND;24~26:+5V?MAX?100mA;27~28:+7.4V?MAX?100mA;29~30:-7.4V?MAX?100mA;34~35:L_OUT;36~37:GND;38~39:R_OUT;41~47:GND。
Ear of the present invention is put card 5 for a plurality of, and each ear is put and is provided with the amplifying circuit that is fit to different tonequality earphones in the card 5, and described power source special battery 11 is 7.4 volts of lithium batteries.
The present invention can change the MP3 player of ear amplifying circuit card; The start back begins to supply power to complete machine through amplifying circuit power source special battery 11; The microprocessor 7 that the DSP decoding chip is housed is carried out boot program through SDRAM random access memory 8, lights display screen to LCD display driver module 9 write orders.The display the play various duties of machine of the display screen of MP3 player of this moment; When the user carries out when selecting in the memory flash chip 10 music or song; Microprocessor 7 programs are carried out play command and are begun playing back music or song, and the DSP decoding chip in the microprocessor 7 divides left and right acoustic channels output after beginning digital signal decoding become simulating signal, through low-pass filter 13; One the road is connected to circuit accessory power outlet 12, supplies the independent power amplifier of peripheral hardware to make input signal source usefulness; Another road output is connected to ear and puts card socket 6; The ear that ear is put the amplifying circuit of the different designs of can pegging graft on the card socket 6 is put card 5; In order to mate the earphone of different impedances; Each pin of putting card socket 6 through ear will be exported the ear that signal and electric current and voltage be transported to grafting and put on the card 5, put signal after the amplifying circuit processing and amplifying of card 5 through ear and put card socket 6 through the ear that connects again and output to earphone jack 2, and the confession user inserts different earphone music appreciating or song.
The ear that the present invention can change the MP3 player peripheral hardware of ear amplifying circuit card is put card and can be changed; And putting card socket 6 and ear to the ear of MP3 player setting puts the interface circuit of card 5 and carries out standard; Make can the peg graft independent ear of multiple different designs amplifying circuit of a MP3 player put card; Insert the earphone of different output impedance in earphone jack 2 again, just can put the different tonequality audio of amplifying circuit acquisition of card 5, satisfy individual's best sense of hearing through ear.
Above-mentioned embodiment is an instance of the present invention, is not to be used for limiting enforcement of the present invention and interest field, and all equivalences of making according to the described content of patent protection scope of the present invention change and modify, and all should be included in the claim of the present invention.

Claims (3)

1. can change the MP3 player that ear is put card for one kind; Comprise MP3 player (1), earphone jack (2) and wiring board; It is characterized in that described MP3 player (1) back side is provided with ear and puts card placed cavity (4), ear is put card placed cavity (4) and is provided with the grafting ear and puts the ear of card (5) and put card socket (6); Described wiring board is provided with a MP3 digital decoding circuit (3); MP3 digital decoding circuit (3) is by being provided with the microprocessor (7) that the DSP decoding chip is housed; Microprocessor (7) connects SDRAM random access memory (8), LCD display driver module (9), memory flash chip (10) respectively; And amplifying circuit power source special battery (11); Microprocessor (7) is put card socket (6) and circuit accessory power outlet (12) through low-pass filter (13) engaging lug on its simulation output left and right acoustic channels circuit road, and described ear is put card socket (6) and is connected with amplifying circuit power source special battery (11), and puts card (5) through ear and be connected with earphone jack (2);
Described ear is put being defined as of pin that card (5) and ear are put card socket (6):
1~3:L_IN;4~6:GND;7~9:R_IN;10~18:GND;19~21:-5VMAX?100mA;22~23:GND;24~26:+5V?MAX?100mA;27~28:+7.4V?MAX?100mA;29~30:-7.4V?MAX?100mA;34~35:L_OUT;36~37:GND;38~39:R_OUT;41~47:GND。
2. according to claim 1ly can change the MP3 player that ear is put card, it is characterized in that, described ear is put card (5) for a plurality of, and each ear is put the amplifying circuit that is provided with suitable different tonequality earphones in the card (5).
3. according to claim 1ly can change the MP3 player that ear is put card, it is characterized in that described power source special battery (11) is 7.4 volts of lithium batteries.
CN2011104329048A 2011-12-21 2011-12-21 MP3 player with headphone amplifier card capable of being replaced Pending CN102543151A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011104329048A CN102543151A (en) 2011-12-21 2011-12-21 MP3 player with headphone amplifier card capable of being replaced

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011104329048A CN102543151A (en) 2011-12-21 2011-12-21 MP3 player with headphone amplifier card capable of being replaced

Publications (1)

Publication Number Publication Date
CN102543151A true CN102543151A (en) 2012-07-04

Family

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Family Applications (1)

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CN2011104329048A Pending CN102543151A (en) 2011-12-21 2011-12-21 MP3 player with headphone amplifier card capable of being replaced

Country Status (1)

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CN (1) CN102543151A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111654772A (en) * 2020-05-21 2020-09-11 头领科技(昆山)有限公司 Bluetooth headset amplifier and use bluetooth headset of this amplifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1968541A (en) * 2006-10-18 2007-05-23 朱庆平 Earphone amplifier with USB soundcard and hub
CN201673685U (en) * 2010-06-03 2010-12-15 郭昊 Audio player suitable for high-quality earphones
GB2480850A (en) * 2010-06-03 2011-12-07 Just Audio Ltd A battery bypass arrangement for a portable headphone amplifier
CN202394539U (en) * 2011-12-21 2012-08-22 边仿 Moving picture experts group audio layer III (MP3) player with replaceable earphone amplification line card

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1968541A (en) * 2006-10-18 2007-05-23 朱庆平 Earphone amplifier with USB soundcard and hub
CN201673685U (en) * 2010-06-03 2010-12-15 郭昊 Audio player suitable for high-quality earphones
GB2480850A (en) * 2010-06-03 2011-12-07 Just Audio Ltd A battery bypass arrangement for a portable headphone amplifier
CN202394539U (en) * 2011-12-21 2012-08-22 边仿 Moving picture experts group audio layer III (MP3) player with replaceable earphone amplification line card

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111654772A (en) * 2020-05-21 2020-09-11 头领科技(昆山)有限公司 Bluetooth headset amplifier and use bluetooth headset of this amplifier

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SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120704

C02 Deemed withdrawal of patent application after publication (patent law 2001)