CN205881463U - Personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group - Google Patents
Personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group Download PDFInfo
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- CN205881463U CN205881463U CN201620746666.6U CN201620746666U CN205881463U CN 205881463 U CN205881463 U CN 205881463U CN 201620746666 U CN201620746666 U CN 201620746666U CN 205881463 U CN205881463 U CN 205881463U
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- circuit
- interface
- fructus rubi
- chip
- audio frequency
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Abstract
The utility model relates to a personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group, including the raspberry send the bottom plate and with the continuous interface circuit of bottom plate is sent to the raspberry, interface circuit is connected with digital analog conversion circuit and power supply circuit. The raspberry sends the bottom plate to include microcontroller and rather than the 12S interface, 12C interface, the USB interface that link to each other, 12S interface, 12C interface connection are extremely the digital analog conversion circuit, USB interface connection has microphone, WIFI module, be used for respectively carrying on pronunciation the collection, carry out the data interaction with online speech recognition storehouse, interface circuit includes power source, button interface, general bus interface and quiet sound control system interface, the digital analog conversion circuit includes digital analog conversion chip circuit and earphone interface circuit. The utility model discloses the circuit is small, functionally complete, reliable and stable, the extension is convenient, adopt the utility model discloses 16 to 32, the high -fidelity audio frequency of 192kHz sample rate can be play to the circuit.
Description
Technical field
This utility model relates to audio frequency personal player field, a kind of intelligent sound HIFI sound based on Fructus Rubi group
Frequently personal player circuit.
Background technology
Along with computer and the development of electronic information technology, intelligent sound HIFI audio frequency personal player is by more and more extensive
Use.
Intelligent sound HIFI audio frequency personal player mainly comprises microcontroller, power circuit and digital to analog converter.And it is big
The shortcoming deficiency of HIFI personal player product of part is: 1, construction cycle length, cost performance are relatively low, 2, equipment size weight own
Amount is relatively big, 3, the audio sample rate supported relatively low, 4, left and right acoustic channels stereo separation not high enough, 5, the inadequate intelligence of independent player
Energyization.
Summary of the invention
In view of this, the purpose of this utility model be to provide a kind of based on Fructus Rubi group intelligent sound HIFI audio frequency broadcast with oneself
Put device circuit, can support 32bit/192kHz interface, support multiple audio file formats, support high impedance ear to put, battery supply
Electricity, support Voice command.
This utility model uses below scheme to realize: a kind of intelligent sound HIFI audio frequency personal player based on Fructus Rubi group
Circuit, sends base plate and the interface circuit sending base plate to be connected with described Fructus Rubi including Fructus Rubi, and described interface circuit connects digital-to-analogue
Change-over circuit and power circuit；
Described Fructus Rubi sends base plate to include microcontroller and coupled 12S interface, 12C interface, USB interface；Described
12S interface, 12C interface are connected to described D/A converting circuit；Described USB interface connects mike, WIFI module, uses respectively
Data interaction is carried out with the collection and online speech recognition library carrying out voice；
Described interface circuit includes power interface, keystroke interface, general purpose interface bus and quiet control interface；
Described D/A converting circuit includes analog-digital chip circuit and earphone interface circuit；Described analog-digital chip electricity
Road is connected to described interface circuit；Described earphone interface circuit is connected with described analog-digital chip circuit；
Described power circuit includes battery and the booster circuit being connected with this battery, mu balanced circuit；Described booster circuit is even
Being connected to described interface circuit, described mu balanced circuit is connected to described D/A converting circuit.
Further, described Fructus Rubi sends base plate to be that Fructus Rubi sends Zero base plate, and the microcontroller chip of this base plate is
BCM2835。
Further, the conversion chip of described D/A converting circuit is the PCM5142 of Texas Instrument.
Further, the boost chip of described booster circuit is fixed frequency high efficiency synchronous rectified boost chip
SDB628。
Further, the voltage stabilizing chip of described mu balanced circuit is low pressure difference linear voltage regulator XC6206.
Compared with prior art, this utility model possesses advantages below:
1, the construction cycle is short, simple in construction, cost performance high, can meet the functional requirement of audio player；
2, support extension SD card, support to play the high-quality music of 192kHz/32bit；
3, support to play the audio file of multiple format, high impedance earphone can be pushed directly on；
4, THD and SNR value are more satisfactory, L channel, the stereo separation height of R channel；
5, battery is powered, compact, can be carried with；
6, Voice command is supported.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is the power supply stabilization circuit figure of this utility model embodiment.
Fig. 3 is the power boost circuit diagram of this utility model embodiment.
Fig. 4 is the D/A converting circuit figure of this utility model embodiment.
Fig. 5 is this utility model embodiment interface and key circuit figure.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is described further by embodiment.
As it is shown in figure 1, present embodiments provide a kind of intelligent sound HIFI audio frequency personal player electricity based on Fructus Rubi group
Road, sends base plate and the interface circuit sending base plate to be connected with described Fructus Rubi including Fructus Rubi, and described interface circuit connects has digital-to-analogue to turn
Change circuit and power circuit；
Described Fructus Rubi sends base plate to include microcontroller and coupled 12S interface, 12C interface, USB interface；Described
12S interface, 12C interface are connected to described D/A converting circuit；Described USB interface connects mike, WIFI module, uses respectively
Data interaction is carried out with the collection and online speech recognition library carrying out voice；
Described interface circuit includes power interface, keystroke interface, general purpose interface bus and quiet control interface；
Described D/A converting circuit includes analog-digital chip circuit and earphone interface circuit；Described analog-digital chip electricity
Road is connected to described interface circuit；Described earphone interface circuit is connected with described analog-digital chip circuit；
Described power circuit includes battery and the booster circuit being connected with this battery, mu balanced circuit；Described booster circuit is even
Being connected to described interface circuit, described mu balanced circuit is connected to described D/A converting circuit.
In the present embodiment, described Fructus Rubi sends base plate to be that Fructus Rubi sends Zero base plate, and the microcontroller chip of this base plate is
BCM2835。
In the present embodiment, the conversion chip of described D/A converting circuit is the PCM5142 of Texas Instrument.
In the present embodiment, the boost chip of described booster circuit is fixed frequency high efficiency synchronous rectified boost chip
SDB628。
In the present embodiment, the voltage stabilizing chip of described mu balanced circuit is low pressure difference linear voltage regulator XC6206.
As it is shown in figure 1, the core of whole system is microcontroller Botong BCM2835 chip, use 3.7V lithium battery power supply, logical
Cross SDB628 boost chip boost to 5V for Fructus Rubi send base plate provide power supply, by XC6206 voltage stabilizing chip voltage stabilizing to 3.3V be
PCM5142 DAC chip provides analog power, and the 3.3V digital power of DAC modular converter is sent from Fructus Rubi and taken base plate, and Fructus Rubi is sent
Control PCM5142 DAC chip by I2C, be decoded conversion to DAC chip, finally by mould by I2S transmission voice data
Onomatopoeia tone signal exports ear and puts, and it is bent that circuit realizes up/down one also by button or Voice command player, and volume adds
Subtract, suspend the functions such as broadcasting.
As in figure 2 it is shown, in the present embodiment, whole power module is powered by the lithium battery of 3.7V, due to whole electricity
Routeing several different block combiner to form, the supply voltage that different modules needs is different, therefore needs source current extraction
Voltage carries out different step-up/downs and processes, to obtain meeting the voltage of modules requirement.B1 magnetic bead is terminated from BATT, can
With high-frequency noise and the spike interference of effectively suppression power supply, it is in parallel that magnetic bead outfan VCC_3.7V is still 3.7V, VCC_3.7V end
Two 10uF electric capacity composition 20uF bulky capacitor can reduce capacitive parasitic parameter and improve XC6206 chip operation stability, more also
The electric capacity of one 0.1uF of connection, can expand the frequency range of filtering, because the interference of different frequency is believed by the electric capacity of different capacitance
Number sensitivity, the parallel connection of two electric capacity can expand the scope of filtering, exports, VCC_3.3V after XC6206 chip voltage stabilizing to 3.3V
End two small one and large one electric capacity in parallel, bulky capacitor is composed in parallel by two identical electric capacity, can be local device with energy
Energy storage device, can make the output homogenization of XC6206 manostat, reduce loading demand.
As it is shown on figure 3, in the present embodiment, draw VCC_3.7V from anode, connect a 22uF bulky capacitor, can subtract
Little input impedance and parasitic capacitance；Input SDB628 chip the 5th pin, provides power supply for chip；In SDB628 chip
Portion's rectifier boost, to after 5V, exports input feedback after VCC_5V, VCC_5V two resistance of termination carry out dividing potential drop from the 1st pin and arrives
Chip the 3rd pin；SDB628 chip the 1st, 6 pin external L1 inductance, can reduce leakage current coupling, and the 4th pin meets VCC_3.7
Drawing high, limiting output electric current is 2A, and the 5th pin connects simulation ground；Last VCC_5V and an indirect 22uF electric capacity on ground, filter
Ripple decouples.
As shown in Figure 4, in the present embodiment, analog-digital chip select PCM5142, wherein, pin1, pin2, pin3,
Pin4, pin5 are the external pins of chip internal negative charge pump, and the effect of negative charge pump is to provide-3.3V power supply for chip internal,
Pin1 meets VCC_3.3 and provides power supply for electric charge pump, and pin3 connects simulation ground, two electricity of indirect 10uF and 0.1uF of pin1 Yu pin3
Holding, provide filtering decoupling capacitor for VCC_3.3V, the flying capacitor of an indirect 2.2uF of pin2 Yu pin4, for negative charge
Pump provides fast charging and discharging electric capacity, the indirect 2.2uF electric capacity of pin5 Yu pin3, provides decoupling capacitor for-3.3V power supply；pin8、
Pin9, pin26, pin27, pin28 are chip power pins, and pin8 meets analog power VCC_3.3V, and pin9 meets simulation ground, pin8
With the indirect 0.1uF electric capacity of pin9, pin28 meets digital power VDD_3.3V, and pin27 connects digitally, between pin27 and pin28
Connecing two electric capacity of 0.1uF and 10uF, pin26 is internal 1.8V logic power, the indirect 0.1uF electric capacity of pin26 Yu pin27, with
Electric capacity between power source and ground all plays the effect of filtering decoupling；pin10、pin16、pin17、pin18、pin20、pin24
Hardware capability for chip configures, and it is VREF pattern that pin10 connects simulation ground default setting, and pin17 meets simulation ground pin18 and meets VCC_
It is I2C pattern that 3.3V arranges PCM5142, and pin16 meets simulation ground pin24 and meets VCC_3.3V and arrange the I2C address of PCM5142 and is
0x4D, pin20 are unsettled arranges the system clock being generated internal SCK by internal phaselocked loop for low level；Pin11, pin12 are
The I2C data signal of PCM5142 and clock signal input pin, be connected to Fructus Rubi and send the I2C interface of interface circuit；pin21、
Pin22, pin23 are the I2S bit clock signal of PCM5142, data signal and wordclock signal input pin, are connected to Fructus Rubi group
The I2S interface of interface circuit；Pin25 is the quiet control input pin of PCM5142, is connected to Fructus Rubi and sends the quiet of interface circuit
Control interface；Pin6, pin7 are PCM5142 left and right sound track signals input pin respectively, and one RC wave filter of each connection is filtered
Ripple, wherein R=470 Ω, C=2.2nF, be finally coupled to earphone interface output；Pin13, pin14, pin15, pin19 are set to hang
Empty.J3 is that ear puts interface.Left and right acoustic channels exports rearmounted RC low pass filter (470 Ω+10nf), it is possible to suppresses out-of-band noise, carry
It is 33.86kHz for Electro-static Driven Comb injury protection, cut-off frequency.
As it is shown in figure 5, in the present embodiment, J2 is that Fructus Rubi sends interface circuit, pin3 (SDA), pin5 (SCL) to be that I2C connects
Mouth is respectively connecting to I2C input pin pin11 and pin12 of PCM5142；pin12(BCK)、pin40(DIN)、pin35
(LRCK) it is I2S interface I2S input pin pin21, pin22 and pin23 of being respectively connecting to PCM5142；Pin11 (XSMT) is
Quiet control interface is connected to the quiet control input pin pin25 of PCM5142；pin13、pin15、pin16、pin18、
Pin22 for by key control interface be respectively connecting to five buttons of KEY1, KEY2, KEY3, KEY4 and KEY5 to realize that next is bent, on
The functions such as one bent, volume adds, volume down, broadcasting time-out；Pin17, pin30 are respectively digital power interface, are respectively connecting to
The pin28(VDD_3.3V of PCM5142) and pin27 (DGND).KEY1, KEY2, KEY3, KEY4, KEY5 be five key circuits,
From VCC3.3V by 10k resistance connection button again to ground, it is connected to Fructus Rubi recited above and sends interface circuit.
Particularly, in the present embodiment, described online speech recognition library is that news fly online speech recognition library.Described boosting core
Sheet is the fixed frequency high efficiency synchronous rectified boost chip SDB628 of general sea, Taiwan microelectronics science and technology.
It is noted that this utility model protection is hardware configuration, do not claim as design communication software.With
Upper it is only in this utility model embodiment a preferably embodiment.But, this utility model is not limited to above-mentioned embodiment party
Case, all any impartial changes done by this utility model scheme and modification, produced function is without departing from this programme
During scope, belong to protection domain of the present utility model.
Claims (5)
1. an intelligent sound HIFI audio frequency personal player circuit based on Fructus Rubi group, it is characterised in that: include that Fructus Rubi sends the end
Plate and send the interface circuit that base plate is connected with described Fructus Rubi, described interface circuit connects D/A converting circuit and power supply electricity
Road；
Described Fructus Rubi sends base plate to include microcontroller and coupled 12S interface, 12C interface, USB interface；Described 12S connects
Mouth, 12C interface are connected to described D/A converting circuit；Described USB interface connects has mike, WIFI module, respectively in order to enter
Collection and the online speech recognition library of lang sound carry out data interaction；
Described interface circuit includes power interface, keystroke interface, general purpose interface bus and quiet control interface；
Described D/A converting circuit includes analog-digital chip circuit and earphone interface circuit；Described analog-digital chip circuit is even
It is connected to described interface circuit；Described earphone interface circuit is connected with described analog-digital chip circuit；
Described power circuit includes battery and the booster circuit being connected with this battery, mu balanced circuit；Described booster circuit is connected to
Described interface circuit, described mu balanced circuit is connected to described D/A converting circuit.
A kind of intelligent sound HIFI audio frequency personal player circuit based on Fructus Rubi group the most according to claim 1, it is special
Levy and be: described Fructus Rubi sends base plate to be that Fructus Rubi sends Zero base plate, and the microcontroller chip of this base plate is BCM2835.
A kind of intelligent sound HIFI audio frequency personal player circuit based on Fructus Rubi group the most according to claim 1, it is special
Levy and be: the conversion chip of described D/A converting circuit is the PCM5142 of Texas Instrument.
A kind of intelligent sound HIFI audio frequency personal player circuit based on Fructus Rubi group the most according to claim 1, it is special
Levy and be: the boost chip of described booster circuit is fixed frequency high efficiency synchronous rectified boost chip SDB628.
A kind of intelligent sound HIFI audio frequency personal player circuit based on Fructus Rubi group the most according to claim 1, it is special
Levy and be: the voltage stabilizing chip of described mu balanced circuit is low pressure difference linear voltage regulator XC6206.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620746666.6U CN205881463U (en) | 2016-07-15 | 2016-07-15 | Personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620746666.6U CN205881463U (en) | 2016-07-15 | 2016-07-15 | Personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group |
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| Publication Number | Publication Date |
|---|---|
| CN205881463U true CN205881463U (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620746666.6U Expired - Fee Related CN205881463U (en) | 2016-07-15 | 2016-07-15 | Personal player circuit of intelligence pronunciation HIFI audio frequency based on raspberry group |
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| Country | Link |
|---|---|
| CN (1) | CN205881463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610683A (en) * | 2017-07-26 | 2018-01-19 | 同济大学 | A kind of programmable music playing system based on Raspberry Pi |
-
2016
- 2016-07-15 CN CN201620746666.6U patent/CN205881463U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107610683A (en) * | 2017-07-26 | 2018-01-19 | 同济大学 | A kind of programmable music playing system based on Raspberry Pi |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20190715 |