CN208805783U - A kind of keyboard of integrated sound card function - Google Patents

A kind of keyboard of integrated sound card function Download PDF

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Publication number
CN208805783U
CN208805783U CN201821674663.1U CN201821674663U CN208805783U CN 208805783 U CN208805783 U CN 208805783U CN 201821674663 U CN201821674663 U CN 201821674663U CN 208805783 U CN208805783 U CN 208805783U
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China
Prior art keywords
keyboard
circuit
sound card
audio
output interface
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CN201821674663.1U
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Inventor
彭国荣
彭国廉
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Shenzhen Rongge Electronics Co Ltd
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Shenzhen Rongge Electronics Co Ltd
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Abstract

The utility model relates to computer equipment fields, provide a kind of keyboard of integrated sound card function, it include: main body, processing chip, keyboard key matrix circuit, audio input output interface circuit and usb circuit, processing chip is connect with keyboard key matrix circuit, audio input output interface circuit and usb circuit respectively, and processing chip, keyboard key matrix circuit, audio input output interface circuit and usb circuit are in body interior;Handling chip includes keyboard scan and control module, sound card module, audio digital signals processing module;Sound card module is connect with keyboard scan and control module and audio digital signals processing module respectively, these functional units are cooperated with chip interior hardware cell by embedded software to realize.The utility model has the advantages that: only sound card and keypad function is realized with a processing chip, only with a connecting line between keyboard and host.

Description

A kind of keyboard of integrated sound card function
Technical field
The utility model relates to computer equipment field, especially a kind of keyboard of integrated sound card function.
Background technique
User removes non-computer when listening to music using computer or smart machine, seeing that video or audio-video are chatted Or smart machine itself is integrated with loudspeaker and microphone (or in order to avoid interfering other people), generally requires outer lug Machine (or speaker) and microphone.
1, the audio input output interface of computer or smart machine is such as directly connected to using peripheral earphone and microphone (usually 3.5mm earphone socket) needs 1 or 2 connecting lines;In view of equipment interface Position Design is different, equipment with Different using distance between user, general earphone and microphone connecting line reserve long length.The complicated multiplicity of equipment internal signal, The factors such as line length is too long are connected, noise is readily incorporated to audio signal, influences sound quality.In addition USB keyboard line, line is more, It is unsightly clean and tidy.
2, as be directly connected to using speaker and microphone computer or smart machine audio input output interface ( It is 3.5mm earphone socket), it needs 1 or 2 connecting lines is also required to connect between speaker and speaker in addition to these connecting lines Line;In addition USB keyboard line, line is more, unsightly neatly;In addition, speaker has certain volume, occupied space.
If 3, circumscribed USB sound card (such as USB SPEAKER, USB MIC), needs to occupy computer or smart machine extremely Few 1 USB port, if perhaps smart machine only has in 1 USB port or the insufficient situation of USB port computer, just Needing similar USB HUB(hub) product extension could access simultaneously.In addition, line is also one more, unsightly neatly.
4, in such a way that USB HUB (hub) is integrated by USB sound card and USB keyboard, although solving and counting Between calculation machine or smart machine the problem of extra line, but internal circuit design is complicated, higher cost, and stability and function expand Malleability is poor.Product can not break through standard, show slightly single.
When using speaker as audio-frequence player device, it should be noted that placement position and distance between microphone and speaker, And otherwise the balance between microphone input gain and speaker output volume is easy to appear excitation and utters long and high-pitched sounds, influence audition body It tests.
Utility model content
The utility model provides a kind of keyboard of integrated sound card function, with single processing chip to overcome above-mentioned deficiency It realizes sound card and keypad function, to simplify circuit, reduces keyboard external connection.
To solve above-mentioned deficiency, the technical solution adopted in the utility model is: a kind of keyboard of integrated sound card function is provided, It include: main body, processing chip, keyboard key matrix circuit, audio input output interface circuit and usb circuit, the place Reason chip is connect with keyboard key matrix circuit, audio input output interface circuit and usb circuit respectively, the processing core Piece, keyboard key matrix circuit, audio input output interface circuit and usb circuit are in body interior;
The processing chip includes keyboard scan and control module, sound card module, audio digital signals processing module;It is described Processing chip is a processing chip;The sound card module is handled with keyboard scan and control module and audio digital signals respectively Module connection.
The processing chip also includes audio decoder module, the audio decoder module and the audio input output interface Circuit connection can decode and play the audio data of specified format.
The main body is also equipped with headset output interface and External microphone input interface, microphone and earphone interface circuit Pin by handling chip is connect with sound card module, and earphone output and External microphone input interface merge using 3.5mm tetra- Save earphone socket.
The main body is also equipped with audio input interface and recording output interface, and audio input and recording output circuit pass through The pin of processing chip is connect with sound card module, and audio input and recording output interface merge using tetra- section earphone socket of 3.5mm.
The main body is also equipped with audio power amplifying circuit and loudspeaker, the audio power amplifying circuit respectively with raise Sound device is connected with audio input output interface.
The main body is also equipped with microphone, and the microphone is connect with audio input output interface.
The keyboard only passes through single line and connect with host.
The main body is also equipped with LED lamp, pin and the keyboard scan of the circuit of the LED lamp by processing chip And control module connection.
Compared with prior art, the beneficial effects of the utility model are:
Sound card and keypad function only are realized with a processing chip, only with a connecting line between keyboard and host.
Detailed description of the invention
Fig. 1 is the schematic diagram that the utility model realizes keyboard, sound card function by single-chip;
Fig. 2 is the circuit diagram that the utility model realizes keyboard, sound card function by single-chip;
Fig. 3 is the utility model keyboard key matrix schematic circuit diagram;
Fig. 4 is the utility model microphone and earphone interface circuit figure;
Fig. 5 is the utility model wheat usb circuit figure of the present invention;
Fig. 6 is the utility model keyboard state indicator light circuit figure;
Fig. 7 is sound accompaniment and recording access socket circuit figure.
Piece mark:
1 main body
2 processing chips
21 keyboard scans and control module
22 sound card modules
23 audio digital signals processing modules
31 keyboard key matrix circuits
32 audio input input interface circuits
33 usb circuits
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, to the technical scheme in the embodiment of the utility model do into One step explanation.
It is the schematic diagram that the utility model realizes keyboard, sound card function by single-chip such as Fig. 1;
The keyboard, comprising: main body, processing chip, keyboard key matrix circuit, audio input output interface circuit and USB Interface circuit, processing chip connect with keyboard key matrix circuit, audio input output interface circuit and usb circuit respectively It connects, processing chip, keyboard key matrix circuit, audio input output interface circuit and usb circuit are in body interior;Processing Chip includes keyboard scan and control module, sound card module, audio digital signals processing module;Sound card module is swept with keyboard respectively It retouches and control module is connected with audio digital signals processing module, these functional units pass through embedded software and chip interior hardware Unit cooperates to realize.
It is the circuit diagram that the utility model realizes keyboard, sound card function by single-chip such as Fig. 2;
The I/O mouth and keyboard matrix connection of chip SOC RP8864, scans keyboard matrix using I/O mouthfuls and obtains Keyboard value realizes computer standard keyboard function and user-defined press key function.
Built-in chip type USB DEVICE or USB OTG peripheral hardware supports Control, Bulk In/Out, Interrupt It is transmitted with Isochronous, multiple programmable Endpoints and enough memories can be provided and cached as usb data (BUFFER), USB sound card and USB keyboard function are realized to meet.Chip supports that (such as microphone audio is believed for audio signal input Number, the input such as musical instrument or audio accompaniment signal) and audio signal export, audio signal can be analog signal and be also possible to count Word signal.
Built-in chip type earphone power amplifier or peripheral earphone power amplifier chips drive earphone, realize that audio plays;It can also be external Audio frequency power amplifier chip drives loudspeaker realizes function of loudspeaker box.
Built-in chip type audio DSP(digital signal processor) or by with external audio frequency DSP(digital signal processor) Interaction post-processes input, output audio signal, such as audio mixing, balanced, audio and voice-grade channel control etc., with full Full border use demand.In the scene that speaker is used together with microphone, it can realize and utter long and high-pitched sounds to excitation by specific audio algorithm Inhibition, promoted audition experience.
Built-in audio decoding can be supported to play specified audio format data or file.
By being interacted with external LED drive chip, LED light is controlled, realizes keyboard light special display effect, increases keyboard and uses Interest.
It supports audio signal input (such as route input, musical instrument input, radio reception, Bluetooth music), supports microphone audio Signal output, extended keyboard multimedia function.
" keyboard scan and control module " obtains push button signalling by scanning key-press matrix;Then push button signalling is converted At corresponding key assignments, it is sent to " sound card module ";" sound card module " carries out data processing according to USB HID codes and standards, passes through USB Interface is sent to host;
Keyboard state indicator light information is sent to processing chip, by " the sound card of chip interior by USB interface by host After module " carries out data processing according to USB HID codes and standards, then keyboard state indicator light information is sent to " keyboard scan And control module ", corresponding indicator light is controlled by " keyboard scan and control module ".
Audio data is sent to processing chip, by " sound card module " basis of chip interior by USB interface by host After USB AUDIO codes and standards carry out data processing, then audio data sends " audio digital signals processing mould to by treated Block ", post-processed by " audio digital signals processing module " (such as equilibrium treatment, audio mixing, I/O channel selection and Volume control etc.), it after having post-processed, is exported with digital audio, or converted by internal Digital To Analog, is exported with analogue audio frequency.
Microphone input or audio input send " audio digital signals processing mould to analog-to-digital conversion at digital audio Block ", post-processed by " audio digital signals processing module " (such as equilibrium treatment, audio mixing, ECHO, REVERB, modified tone, howl It is inhibition, I/O channel selection and volume control etc.), the audio data of post-processing sends " sound card module ", " sound to After card module " carries out data processing according to USB AUDIO codes and standards, by USB interface, it is sent to host.The sound of post-processing Frequency evidence can also be converted by internal Digital To Analog, exported with analogue audio frequency and given other recording and/or reproducing apparatus.
It is the utility model keyboard key matrix schematic circuit diagram such as Fig. 3;
The key-press matrix scanning circuit and keyboard key matrix circuit connection for handling chip RP8864 obtain keyboard letter Number.
It is the utility model microphone and earphone interface circuit figure such as Fig. 4;
The DAC_LO with microphone and earphone interface circuit respectively of chip RP8864 pin 6,7,8 is handled,
The input and output processing of audio signal is realized in DAC_RO, MIC1_IN connection.
It is the utility model wheat usb circuit figure of the present invention such as Fig. 5;
The USB_DM and USB_DP of circuit are connect with 28 and No. 29 pins of processing chip respectively.
It is the utility model keyboard state indicator light circuit figure such as Fig. 6;
3 routes of indicator light circuit parallel connection are connect with 25,26 and No. 27 pins of processing chip respectively.
It is sound accompaniment and recording access socket circuit figure such as Fig. 7;
LINEIN_R, LINEIN_L, REC_OUT of sound accompaniment and recording access socket circuit respectively with processing chip pin 12,13,2 connection.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard To belong to the protection scope of the utility model.

Claims (8)

1. a kind of keyboard of integrated sound card function, comprising: main body, processing chip, keyboard key matrix circuit, audio input output Interface circuit and usb circuit, the processing chip respectively with keyboard key matrix circuit, audio input output interface circuit It is connected with usb circuit, the processing chip, keyboard key matrix circuit, audio input output interface circuit and USB interface Circuit is in body interior;
It is characterized by: the processing chip includes that keyboard scan and control module, sound card module, audio digital signals handle mould Block;The sound card module is connect with keyboard scan and control module and audio digital signals processing module respectively.
2. a kind of keyboard of integrated sound card function according to claim 1, it is characterised in that: the processing chip also includes Audio decoder module, the audio decoder module and the audio input output interface circuit connection, can decode and play specified The audio data of format.
3. a kind of keyboard of integrated sound card function according to claim 1 or 2, it is characterised in that: the main body is also installed There are headset output interface and External microphone input interface, the pin and sound that microphone and earphone interface circuit pass through processing chip Card module connection, earphone output and External microphone input interface, which merge, uses tetra- section earphone socket of 3.5mm.
4. a kind of keyboard of integrated sound card function according to claim 1 or 2, it is characterised in that: the main body is also installed There are audio input interface and recording output interface, audio input and recording output circuit pin and sound card mould by processing chip Block connection, audio input and recording output interface, which merge, uses tetra- section earphone socket of 3.5mm.
5. a kind of keyboard of integrated sound card function according to claim 4, it is characterised in that: the main body is also equipped with sound Frequency power amplification circuit and loudspeaker, the audio power amplifying circuit connect with loudspeaker and audio input output interface respectively It connects.
6. a kind of keyboard of integrated sound card function according to claim 5, it is characterised in that: the main body is also equipped with wheat Gram wind, the microphone are connect with audio input output interface.
7. a kind of keyboard of integrated sound card function according to claim 1, it is characterised in that: between the keyboard and host Only connected by single line.
8. a kind of keyboard of integrated sound card function according to claim 6, it is characterised in that: the main body is also equipped with The circuit of LED lamp, the LED lamp is connect by the pin of processing chip with the keyboard scan and control module.
CN201821674663.1U 2018-10-16 2018-10-16 A kind of keyboard of integrated sound card function Active CN208805783U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821674663.1U CN208805783U (en) 2018-10-16 2018-10-16 A kind of keyboard of integrated sound card function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821674663.1U CN208805783U (en) 2018-10-16 2018-10-16 A kind of keyboard of integrated sound card function

Publications (1)

Publication Number Publication Date
CN208805783U true CN208805783U (en) 2019-04-30

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CN201821674663.1U Active CN208805783U (en) 2018-10-16 2018-10-16 A kind of keyboard of integrated sound card function

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111367420A (en) * 2020-03-13 2020-07-03 光宝电子(广州)有限公司 Keyboard module and keyboard device
CN111736710A (en) * 2020-05-11 2020-10-02 广东天波信息技术股份有限公司 Intelligent keyboard and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111367420A (en) * 2020-03-13 2020-07-03 光宝电子(广州)有限公司 Keyboard module and keyboard device
US11749473B2 (en) 2020-03-13 2023-09-05 Lite-On Electronics (Guangzhou) Limited Keyboard module and keyboard device
CN111736710A (en) * 2020-05-11 2020-10-02 广东天波信息技术股份有限公司 Intelligent keyboard and control method thereof

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