CN108260040A - For individual earphones headphone amplifier circuit and its operating method and use its Headphone device with USB interface - Google Patents
For individual earphones headphone amplifier circuit and its operating method and use its Headphone device with USB interface Download PDFInfo
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- CN108260040A CN108260040A CN201611245592.9A CN201611245592A CN108260040A CN 108260040 A CN108260040 A CN 108260040A CN 201611245592 A CN201611245592 A CN 201611245592A CN 108260040 A CN108260040 A CN 108260040A
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- audio signal
- right channel
- individual earphones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
- Headphones And Earphones (AREA)
Abstract
The embodiment of the present invention provides a kind of headphone amplifier circuit and its operating method for individual earphones and uses its Headphone device with USB interface.The output stage of the headphone amplifier circuit will be improved as differential output structure, effectively to solve the problems, such as that left and right acoustic channels interaction crosstalk interferes, and and then increase the separating degree of left and right acoustic channels so that the spatial impression and distance perspective contained in cd audio properties CD there can be more specific presentation.
Description
Technical field
The invention relates to a kind of headphone amplifier circuits for being used for individual earphones (headphone speaker)
(headphone amplifier circuit) and its operating method, and it is particularly a kind of in view of improvement Earphone Amplifier electricity
The output stage on road has above-mentioned headphone amplifier circuit for differential output (differential output) structure and use
A kind of Headphone device with USB interface.
Background technology
For current individual earphones, when the wiring of the individual earphones is coupled to headphone amplifier circuit, meeting
Because the output stage of headphone amplifier circuit in itself is using single-ended (single-ended) export structure, so that earphone list
For the left and right acoustic channels of body when playing sound, the sound of L channel can be audible in right channel a littlely, and L channel also can a littlely
The sound of right channel is audible.
For example, referring to Fig. 1, Fig. 1 is the schematic diagram of the headphone amplifier circuit of known Single-end output structure.Such as figure
Shown in 1, headphone amplifier circuit 12 is made in an integrated circuit (integrated circuit, IC) 10, and integrated electricity
Include at least three contact HPO_R, HPO_L, GND_ref on road 10, and these three contacts HPO_R, HPO_L, GND_ref are then
Three different contact R, L, GND being connected to respectively by wiring on individual earphones 14.On the other hand, individual earphones 14 further include
One auris dextra earphone 14_R and one left ear earphone 14_L.
When individual earphones 14 are combined with integrated circuit 10, and headphone amplifier circuit 12 starts operation, earphone amplification
Left monaural audio signal caused by device circuit 12 will be via the contact HPO_L on integrated circuit 10 and connecing on individual earphones 14
Point L, to be transferred in left ear earphone 14_L, and auris dextra audio signal caused by headphone amplifier circuit 12 then can be via integrated
The contact HPO_R and contact R on individual earphones 14 on circuit 10, to be transferred in auris dextra earphone 14_R.
However, as shown in Figure 1, due to left ear earphone 14_L and auris dextra earphone 14_R share it is same with reference to earth point
(reference ground), therefore when integrated circuit 10 exports auris dextra audio signal by contact HPO_R, there is the right side of part
Monaural audio signal can be coupled to the wiring between contact GND and contact GND_ref, these follow-up coupled signals can then be transmitted to a left side
In ear earphone 14_L, and cause user that can hear auris dextra audio signal by left ear earphone 14_L, therefore influence the matter listened to
Amount.
In view of this, how effectively to solve the problems, such as that above-mentioned left and right acoustic channels interaction crosstalk interferes (crosstalk), and into
And the problem of increasing the separating degree (isolation) of left and right acoustic channels, being really fields urgent need to resolve.
Invention content
The embodiment of the present invention provides a kind of headphone amplifier circuit for individual earphones.Wherein, this individual earphones is used for
The sound of a L channel and/or a right channel is played, and it includes one first L channel input contact, the inputs of one second L channel
Contact, one first right channel input contact, one second right channel input contact, a left ear earphone and an auris dextra earphone.The ear
Machine amplifier circuit includes an audio frequency processing circuit and an at least phase regulator.Audio frequency processing circuit is used for generating a left power of hearing
Frequency signal and an auris dextra audio signal.Phase regulator is then coupled to audio frequency processing circuit, and for respectively to left power of hearing frequency
Signal and auris dextra audio signal are into horizontal phasing control, to produce identical with left monaural audio signal amplitude and opposite in phase 1
One adjustment signal and a second adjustment signal identical and opposite in phase with auris dextra audio signal amplitude.
The embodiment of the present invention separately provides a kind of operating method of the headphone amplifier circuit for individual earphones.Wherein, this
Individual earphones are used for playing the sound of a L channel and/or a right channel, and it includes one first L channel input contact, one the
Two L channels input contact, one first right channel input contact, one second right channel input contact, a left ear earphone and an auris dextra
Earphone.The operating method includes the following steps.First, using an audio frequency processing circuit, a left monaural audio signal and one is generated
Auris dextra audio signal.Then, using an at least phase regulator, respectively to carry out left monaural audio signal and auris dextra audio signal
Phase adjustment, to produce and a first adjustment signal of opposite in phase and and auris dextra identical with left monaural audio signal amplitude
Audio signal amplitude is identical and a second adjustment signal of opposite in phase.
The embodiment of the present invention separately provides a kind of tool universal serial bus (universal serial bus, USB) interface
Headphone device.The Headphone device includes a USB plug, a USB digital quantizers (USB signal to Digital
Audio converter), a digital analog converter (digital to analog audio converter, DAC), an ear
Machine amplifier circuit and an individual earphones.USB plug is used for being combined with the USB socket on a main frame.USB numbers turn
Parallel operation is then used for providing the digital usb signal to come received from this main frame by USB plug, and counting this into
Word usb signal is converted into an audio digital signals.Digital analog converter is then coupled to this USB digital quantizer, and is used for
This audio digital signals is converted into an audio analog signals.Headphone amplifier circuit is coupled to the digital analog converter,
And for producing a left monaural audio signal, an auris dextra audio signal, a first adjustment signal and a second adjustment signal.Ear
Machine monomer is coupled to the headphone amplifier circuit, and the sound for playing a L channel and/or a right channel.Wherein, ear
Machine monomer contains one first L channel input contact, one second L channel input contact, one first right channel input contact, one
Second right channel input contact, a left ear earphone and an auris dextra earphone, and headphone amplifier circuit includes an audio frequency processing circuit
An and at least phase regulator.Audio frequency processing circuit, for according to this audio digital signals, with produce left monaural audio signal and
Auris dextra audio signal.Phase regulator is then used for respectively to left monaural audio signal and auris dextra audio signal into horizontal phasing control, with
Produce identical with left monaural audio signal amplitude and opposite in phase the first adjustment signal and with auris dextra audio signal amplitude phase
The second adjustment signal of opposite in phase together.
Preferably, the headphone amplifier circuit is disposed in an integrated circuit, and one the is included on this integrated circuit
One L channel output contact, one second L channel output contact, one first right channel output contact and one second right channel are defeated
Go out contact, to be used for inputting contact, first right side with the first L channel input contact, the second L channel on this individual earphones respectively
Sound channel inputs contact and the second right channel input contact is connected.
Preferably, when this individual earphones is used for playing the sound of L channel, the left power of hearing caused by audio frequency processing circuit
Frequency signal will be inputted through the first L channel on the first L channel output contact on thus integrated circuit and this individual earphones
Contact, to be transferred in left ear earphone；Meanwhile the and phase identical with left monaural audio signal amplitude gone out produced by phase regulator
Opposite the first adjustment signal, then can be through the on the second L channel output contact on thus integrated circuit and this individual earphones
Two L channels input contact, to be transferred in left ear earphone.
Preferably, when this individual earphones is used for playing the sound of right channel, auris dextra sound caused by audio frequency processing circuit
Frequency signal will be inputted through the first right channel on the first right channel output contact on thus integrated circuit and this individual earphones
Contact, to be transferred in auris dextra earphone；Meanwhile the and phase identical with auris dextra audio signal amplitude gone out produced by phase regulator
Opposite second adjustment signal, then can be through the on the second right channel output contact on thus integrated circuit and this individual earphones
Two right channels input contact, to be transferred in auris dextra earphone.
In conclusion headphone amplifier circuit for individual earphones that the embodiment of the present invention is provided and its operation side
Method and use its Headphone device with USB interface, can be by improvement headphone amplifier circuit output stage be it is poor
Dynamic export structure, effectively to solve the problems, such as that left and right acoustic channels interaction crosstalk interferes, and and then increase the separating degrees of left and right acoustic channels,
The spatial impression contained in cd audio properties CD and distance perspective is enabled to have more specific presentation.In addition to this, through aforesaid operations, sheet
Inventive embodiments provided for the headphone amplifier circuit and its operating method of individual earphones and having using it
The Headphone device of USB interface also can will simultaneously solve that output amplitude in the prior art is insufficient and radiation interference is asked
Topic.
For the enabled feature and technology contents for being further understood that the present invention, please refer to below in connection with the present invention specifically
Bright and attached drawing, but these explanations are intended merely to illustrate the present invention rather than the interest field of the present invention are appointed with institute's accompanying drawings
What limitation.
Description of the drawings
Fig. 1 is the schematic diagram of the headphone amplifier circuit of known Single-end output structure.
Fig. 2 is the circuit diagram of the headphone amplifier circuit for individual earphones that the embodiment of the present invention is provided.
Fig. 3 be the headphone amplifier circuit of Fig. 2 for eliminate radiation interference schematic diagram.
Fig. 4 is the flow of the operating method of the headphone amplifier circuit for individual earphones that the embodiment of the present invention is provided
Schematic diagram.
Fig. 5 is the function block schematic diagram of the Headphone device with USB interface that the embodiment of the present invention is provided.
Symbol description
10、20、20’：Integrated circuit
12、22、22’：Headphone amplifier circuit
220、220’：Audio frequency processing circuit
222、222’：Phase regulator
HPO_R、HPO_L、GND_ref、R、L、GND、HPO_L1、HPO_L2、HPO_R1、HPO_R2、L1、L2、R1、R2、
HPO_L1’、HPO_L2’、HPO_R1’、HPO_R2’、L1’、L2’、R1’、R2’：Contact
14、24、24’：Individual earphones
14_R、24_R、24’_R：Auris dextra earphone
14_L、24_L、24’_L：Left ear earphone
SL、SL’：Left monaural audio signal
SR、SR’：Auris dextra audio signal
Sa1、Sa1’：The first adjustment signal
Sa2、Sa2’：Second adjustment signal
S401~S407：Process step
5：Headphone device
52：USB plug
54：USB digital quantizers
56：Digital analog converter
SUSB：Digital usb signal
SD：Audio digital signals
SA：Audio analog signals
Specific embodiment
Hereinafter, various embodiments of the present invention will be illustrated by schema the present invention is described in detail.It is however, of the invention
Concept may embody in many different forms, and should not be construed as limited by exemplary embodiments set forth herein.In addition,
Same reference numbers can be used to represent similar component in the drawings.
First, referring to Fig. 2, the headphone amplifier circuit for individual earphones that Fig. 2, which is the embodiment of the present invention, to be provided
Circuit diagram.The headphone amplifier circuit 22 mainly includes an audio frequency processing circuit 220 and an at least phase regulator
222.Wherein, above-mentioned each component can be realized or through hardware circuit collocation firmware or soft through pure hardware circuit
Part is realized.To sum up, the present invention is not intended to limit the specific implementation of headphone amplifier circuit 22.In addition to this, it is above-mentioned
Audio frequency processing circuit 220 and phase regulator 222 can be integrated or be provided separately, and the present invention is also not limited system.
Furthermore, it is understood that audio frequency processing circuit 220 is for generating a left monaural audio signal SL and auris dextra audio letter
Number SR, and phase regulator 222 is then coupled to audio frequency processing circuit 220, and for respectively to left monaural audio signal SL and
Auris dextra audio signal SR is into horizontal phasing control, to produce identical with left monaural audio signal SL amplitudes and opposite in phase one first
Adjust a signal Sa1 and second adjustment signal Sa2 identical and opposite in phase with auris dextra audio signal SR amplitudes.
However, the operation principles by headphone amplifier circuit 22 are practised by the usually intellectual of having in the art
Know, therefore just do not add to repeat in this about the detailed content of audio frequency processing circuit 220 and phase regulator 222.It is worth note
Meaning, the present invention go out left monaural audio signal SL's and auris dextra audio signal SR produced by being not intended to limit audio frequency processing circuit 220
Specific implementation, therefore the usually intellectual of having should can be designed according to actual demand or application in the art.
As described in previous contents, headphone amplifier circuit 22 can be made in an integrated circuit 20.Therefore, in this implementation
It is just main comprising there are four contact HPO_L1, HPO_L2, HPO_R1, HPO_R2 on integrated circuit 20 in example.In addition, earphone list
It can equally be included on body 24 there are four contact L1, L2, R1, R2, and this four contacts HPO_L1, HPO_ on integrated circuit 20
L2, HPO_R1, HPO_R2 are then connected to this four contacts L1, L2, R1, R2 on individual earphones 24 by wiring respectively.It needs
Illustrate, the specific implementation of the invention being not intended to limit when individual earphones 24 are connected with integrated circuit 20, therefore this technology
Having usually intellectual in field should can be designed according to actual demand or application.
In practice, this four contacts HPO_L1, HPO_L2, HPO_R1, HPO_R2 on integrated circuit 20 can first distinguish
Four different endpoints being connected on an audio socket (not being painted) by wiring.On the other hand, individual earphones 24 can then wrap
It (is not painted) containing an audio plug, and contact L1, L2, R1 and R2 is just provided on the audio plug.Therefore, work as individual earphones
When 24 audio plug is inserted into audio socket, it can also refer to individual earphones 24 being combined with integrated circuit 20.Together
Reason, individual earphones 24 can be used to the sound for playing a L channel and/or a right channel, therefore individual earphones 24 contain an auris dextra
The left ear earphone 24_L of earphone 24_R and one.
Then, in the case where headphone amplifier circuit 22 has progress playback action, when individual earphones 24 are used for playing a left side
During the sound of sound channel, left monaural audio signal SL will be via the contact on integrated circuit 20 caused by audio frequency processing circuit 220
The HPO_L1 and contact L1 on individual earphones 24, to be transferred in left ear earphone 24_L；Meanwhile produced by phase regulator 222
The first adjustment signal Sa1 identical with left monaural audio signal SL amplitudes and opposite in phase gone out, then can be via on integrated circuit 20
Contact HPO_L2 and individual earphones 24 on contact L2, to be transferred in left ear earphone 24_L.
On the other hand, it is right caused by audio frequency processing circuit 220 when individual earphones 24 are used for playing the sound of right channel
Monaural audio signal SR will be via the contact R1 on the contact HPO_R1 on integrated circuit 20 and individual earphones 24, to be transferred to the right side
In ear earphone 24_R；Meanwhile go out produced by phase regulator 222 identical with auris dextra audio signal SR amplitudes and opposite in phase
Second adjustment signal Sa2, then can be via the contact R2 on the contact HPO_R2 on integrated circuit 20 and individual earphones 24, to transmit
Into auris dextra earphone 24_R.
It is apparent that the left and right acoustic channels being different from Fig. 1 are the tradition using a signal transmssion line one piece-root grafting ground wire of collocation
The practice, and the left and right acoustic channels in the embodiment of the present invention are then simultaneously using two piece-root grafting lines (also that is, contact HPO_L1 is between contact L1
Wiring and contact HPO_L2 to the wiring between contact L2 or contact HPO_R1 to the wiring between contact R1 and contact HPO_R2 extremely
Wiring between contact R2) signal is all transmitted, and the signal that this two piece-root graftings line is transmitted is (also that is, left monaural audio signal SL and
One adjustment signal Sa1 or auris dextra audio signal SR and second adjustment signal Sa2) it is then that amplitude is identical each other, but opposite in phase.
In other words, the signal that this two piece-root graftings line is transmitted just can be seen as a differential wave.
In this regard, as can be known from Fig. 2, even only in the sound for playing single sound channel (for example, L channel or right channel)
In the case of, since left ear earphone 24_L and auris dextra earphone 24_R does not share the same reason with reference to earth point, left ear
Cd audio properties CD or auris dextra cd audio properties CD, it is online would not to be also coupled to other transmission.Teaching according to the above, this
In technical field have usually intellectual should be appreciated that, one of 22 main spirits of headphone amplifier circuit of the invention be
In, its output stage is improved as differential output structure, effectively to solve the problems, such as that left and right acoustic channels interaction crosstalk interferes, and and then increasing
Add the separating degree of left and right acoustic channels so that the spatial impression and distance perspective contained in cd audio properties CD there can be more specific presentation.
On the other hand, through aforesaid operations, have usually intellectual in the art also, it is recognized that since earphone is put
The output stage improvement of big device circuit 22 is differential output structure, therefore the headphone amplifier circuit 22 of the present invention can also solve simultaneously
The problem of certainly output amplitude (also that is, volume) is insufficient in the prior art.Specifically, general Single-end output structure all can
There is the limitation of output amplitude (outputswing).Therefore, if by taking the headphone amplifier circuit of low-power consumption as an example, in Fig. 1
Signal amplitude that headphone amplifier circuit 12 can be output can be the largest of about 1Vrms, and be pushed with such signal amplitude
The earphone (for example, 600Ohm) of high impedance will be easy to meet just before wattage is insufficient the problem of.
In other words, the problem of output amplitude is insufficient but will jointly influence the impedance limit of arranged in pairs or groups earphone.
However, as shown in Fig. 2, since the output stage of headphone amplifier circuit 22 is improved as differential output structure, the ear of the present invention
The signal amplitude that machine amplifier circuit 22 can be output just opposite to double (for example, 1Vrms becomes 2Vrms) more.So
One, headphone amplifier circuit 22 of the invention more can easily push the earphone of high impedance, and use increase and arrange in pairs or groups earphone
Impedance ranges.
On the other hand, since each signal transmssion line can be similar to a strip antenna, easily cause antenna effect and by
To the influence of radiation interference (radio interference).But also referring to Fig. 3, Fig. 3 is the Earphone Amplifier of Fig. 2
Circuit for eliminate radiation interference schematic diagram.According to the technology of differential output it is found that this radiation interference generally can be equivalent
And it is online (for example, contact HPO_L1 is to the wiring between contact L1 and contact HPO_L2 to be simultaneously loaded into two signal transmissions
Wiring between contact L2), and its difference is then 0.Therefore, headphone amplifier circuit 22 of the invention also can be eliminated effectively
The influence of radiation interference, and thereby improve the clarity of cd audio properties CD.
Then, in order to illustrate further the operation workflow about headphone amplifier circuit 22, the present invention further provides
A kind of embodiment of its operating method.Referring to Fig. 4, the ear for individual earphones that Fig. 4, which is the embodiment of the present invention, to be provided
The flow diagram of the operating method of machine amplifier circuit.Operating method described in this example can be shown in Fig. 2 earphone amplification
It performs in device circuit 22, therefore is please understood together according to Fig. 2 to Fig. 4 with profit.In addition, detailed step flow such as previous embodiment institute
It states, is only summarized in this and no longer add redundant.
First, in step S401, using an audio frequency processing circuit, a left monaural audio signal and auris dextra audio letter are generated
Number.Secondly, in step S403, using an at least phase regulator, come respectively to left monaural audio signal and auris dextra audio signal
Into horizontal phasing control, to produce identical with left monaural audio signal amplitude and opposite in phase a first adjustment signal, Yi Jiyu
Auris dextra audio signal amplitude is identical and a second adjustment signal of opposite in phase.
Then, in step S405, when individual earphones are used for playing the sound of L channel, the on integrated circuit is utilized
One L channel output contact (for example, contact HPO_L1 in Fig. 2) and the first L channel input contact (example on individual earphones
Such as, the contact L1 in Fig. 2), monaural audio signal left caused by audio frequency processing circuit is transferred in left ear earphone；Meanwhile
Utilize second on the second L channel output contact (for example, contact HPO_L2 in Fig. 2) on integrated circuit and individual earphones
L channel input contact (for example, contact L2 in Fig. 2), the first adjustment signal gone out produced by phase regulator is transferred to
In left ear earphone.
In addition, in step S 407, when individual earphones are used for playing the sound of right channel, the on integrated circuit is utilized
One right channel output contact (for example, contact HPO_R1 in Fig. 2) and the first right channel input contact (example on individual earphones
Such as, the contact R1 in Fig. 2), auris dextra audio signal caused by audio frequency processing circuit is transferred in auris dextra earphone；Meanwhile
Utilize second on the second right channel output contact (for example, contact HPO_R2 in Fig. 2) on integrated circuit and individual earphones
Right channel input contact (for example, contact R2 in Fig. 2), the second adjustment signal gone out produced by phase regulator is transferred to
In auris dextra earphone.
It should be understood that step S405 and step S407 are then parallel the step of performing and not conflicting.In addition, it is worth note
Meaning, when this four contacts that the present invention is not also limited on integrated circuit are connect with this four contacts on individual earphones
Specific implementation, therefore the usually intellectual of having should can be designed according to actual demand or application in the art.
On the other hand, in recent years, the Headphone device with USB interface just gradually emerges, especially with new Type-C specifications
More possess the function of many innovations.Therefore, an object of the present invention is lain also in, and a kind of use is provided to have above-mentioned earphone to amplify
The Headphone device with USB interface of device circuit.Referring to Fig. 5, Fig. 5 is the embodiment of the present invention provided have USB interface
Headphone device function block schematic diagram.Wherein, partly with the same or similar components of Fig. 2 with the same or similar in Fig. 5
Figure number indicates, therefore just no longer adds its detailed details in this.
Turn as shown in figure 5, Headphone device 5 mainly includes a USB plug 52, a USB digital quantizers 54, a digital simulation
Parallel operation 56, headphone amplifier circuit 22 and individual earphones 24.Wherein, above-mentioned USB digital quantizers 54, digital analog converter 56
And headphone amplifier circuit 22 can be integrate or be provided separately, and the present invention is not limited thereto system.USB plug 52 is used for
It is combined with the USB socket on a main frame (not being painted), and USB digital quantizers 54 are then used for through USB plug 52
The digital usb signal S provided received from the main frameUSB, and by number usb signal SUSBIt is converted into
For an audio digital signals SD.Then, digital analog converter 56 is then coupled to USB digital quantizers 54, and for should
Audio digital signals SDIt is converted into an audio analog signals SA。
In addition, headphone amplifier circuit 22 ' is coupled to digital analog converter 54, and for generating left monaural audio signal
SL ', auris dextra audio signal SR ', the first adjustment signal Sa1 ' and second adjustment signal Sa2 '.Finally, the then coupling of individual earphones 24 '
It is connected to headphone amplifier circuit 22 ', and the sound for playing a L channel and/or a right channel.Wherein, the ear in Fig. 5
Machine amplifier circuit 22 ', just similar to the headphone amplifier circuit 22 in Fig. 2, and the individual earphones 24 ' in Fig. 5, then it is similar to
Individual earphones 24 in Fig. 2.Therefore, the headphone amplifier circuit 22 ' in Fig. 5 equally include an audio frequency processing circuit 220 ' and
An at least phase regulator 222 ', and the individual earphones 24 ' in Fig. 5 then equally include 24 ' _ R of auris dextra earphone and a left ear
Earphone 24 ' _ L.
However, since the operation principles of USB digital quantizers 54 and digital analog converter 56 is have in the art
Known to usually intellectual, therefore just do not add to repeat in this about its detailed content.It should be noted that in this implementation
In example, above-mentioned so-called " having USB interface " can also refer to that USB plug 52 meets Type-C specifications, but the present invention is not
As limitation.In other words, the present invention is not intended to limit the specific implementation of USB plug 52.In addition to this, such as previous contents
Described, in the present embodiment, USB digital quantizers 54, digital analog converter 56 and headphone amplifier circuit 22 are can be whole
Close setting, therefore USB digital quantizers 54 and digital analog converter 56 or common with headphone amplifier circuit 22 '
Ground is made in same integrated circuit 20 ', but the present invention is also not limited system.
Then, it is thus evident that on the integrated circuit 20 ' in Fig. 5 also it is main include there are four contact HPO_L1 ', HPO_L2 ',
HPO_R1’、HPO_R2’.In addition, then being included on individual earphones 24 ' in Fig. 5 there are four contact L1 ', L2 ', R1 ', R2 ', and collect
Can ear be connected to by wiring respectively into this four contact HPO_L1 ', HPO_L2 ', HPO_R1 ', the HPO_R2 ' on circuit 20 '
This four contact L1 ', L2 ', R1 ', R2 ' on machine monomer 24 '.It needs to illustrate again, the present invention does not also limit integrated electricity
This four contact HPO_L1 ', HPO_L2 ', HPO_R1 ', HPO_R2 ' on road 20 ' and this four contacts on individual earphones 24 '
Specific implementation when L1 ', L2 ', R1 ', R2 ' are connected, therefore the usually intellectual of having should can be according to reality in the art
Border demand is applied to be designed.
Therefore, teaching according to the above, in the art the usually intellectual of having should be appreciated that, in Fig. 5
Audio frequency processing circuit 220 ' can be then for according to audio analog signals SA, to produce left monaural audio signal SL ' and auris dextra
Audio signal SR '.In addition, the phase regulator 222 ' in Fig. 5 is then similary for respectively to left monaural audio signal SL ' and auris dextra sound
Frequency signal SR ' is believed into horizontal phasing control with producing identical with left monaural audio signal SL ' amplitudes and opposite in phase the first adjustment
Number Sa1 ' and second adjustment signal Sa2 ' identical and opposite in phase with auris dextra audio signal SR ' amplitudes.
It is worth noting that, audio analog signals S caused by digital analog converter 56A, you can it is, for example, sound more than one
The audio analog signals S in roadA.In other words, audio analog signals SAIn contain audio analog signals and the right side of L channel
The audio analog signals of sound channel.Therefore, the operation performed by above-mentioned audio frequency processing circuit 220 ' then can be seen as in advance to left sound
The audio analog signals of road/right channel are adjusted (for example, carrying out the adjustment of gain), are believed with producing suitable left power of hearing frequency
Number SL ' and auris dextra audio signal SR '.To sum up, the present invention does not also limit 220 ' institute of audio frequency processing circuit according to the audio number
Word signal SA and the specific implementation for producing left monaural audio signal SL ' and auris dextra audio signal SR ', therefore in the art
Tool usually intellectual should can be designed according to actual demand or application.
Therefore, when individual earphones 24 ' are for playing the sound of L channel, left ear caused by audio frequency processing circuit 220 '
Audio signal SL ' will be via the contact L1 ' on the contact HPO_L1 ' on integrated circuit 20 ' and individual earphones 24 ', to transmit
Into 24 ' _ L of left ear earphone；Meanwhile the and phase identical with left monaural audio signal SL ' amplitudes gone out produced by phase regulator 222 '
The opposite the first adjustment signal Sa1 ' in position, then can be via on the contact HPO_L2 ' on integrated circuit 20 ' and individual earphones 24 '
Contact L2 ', to be transferred in 24 ' _ L of left ear earphone.
In addition, when individual earphones 24 ' are for playing the sound of right channel, auris dextra caused by audio frequency processing circuit 220 '
Audio signal SR ' will be via the contact R1 ' on the contact HPO_R1 ' on integrated circuit 20 ' and individual earphones 24 ', to transmit
Into 24 ' _ R of auris dextra earphone；Meanwhile the and phase identical with auris dextra audio signal SR ' amplitudes gone out produced by phase regulator 222 '
The opposite second adjustment signal Sa2 ' in position, then can be via on the contact HPO_R2 ' on integrated circuit 20 ' and individual earphones 24 '
Contact R2 ', to be transferred in 24 ' _ R of auris dextra earphone.
However, since digital analog converter 56 and headphone amplifier circuit 22 can also integrate setting.Therefore, according to
The teaching of more than content, in the art the usually intellectual of having should be appreciated that, in some other embodiment, Fig. 5
Phase regulator 222 ' can also directly be implemented among digital analog converter 56.Thus, digital simulation turns
Audio analog signals S caused by parallel operation 56A, you can it is included as two audio analog signals of L channel/right channel, Yi Jiyu
This two audio analog signals amplitudes of L channel/right channel are identical and another two audio analog signals of opposite in phase.It is similar
Ground, the operation performed by audio frequency processing circuit 220 ' then can be seen as in advance increasing this above-mentioned four audio analog signals
Benefit adjustment, to produce left monaural audio signal SL ', auris dextra audio signal SR ', the first adjustment signal Sa1 ' and second adjustment signal
Sa2’.To sum up, realization method is merely citing herein used by above-mentioned Headphone device 5, it is not to limit this hair
It is bright, therefore the usually intellectual of having should can carry out relevant design according to actual demand or application in the art.
In conclusion headphone amplifier circuit for individual earphones that the embodiment of the present invention is provided and its operation side
Method and use its Headphone device with USB interface, can be by improvement headphone amplifier circuit output stage be it is poor
Dynamic export structure, effectively to solve the problems, such as that left and right acoustic channels interaction crosstalk interferes, and and then increase the separating degrees of left and right acoustic channels,
The spatial impression contained in cd audio properties CD and distance perspective is enabled to have more specific presentation.In addition to this, through aforesaid operations, sheet
Inventive embodiments provided for the headphone amplifier circuit and its operating method of individual earphones and having using it
The Headphone device of USB interface also can will simultaneously solve that output amplitude in the prior art is insufficient and radiation interference is asked
Topic.
The foregoing is merely the embodiment of the present invention, are not the scope of the claims to limit to the present invention.
Claims (10)
1. a kind of headphone amplifier circuit for being used for an individual earphones, the wherein individual earphones be used for play a L channel and/or
The sound of one right channel, and the individual earphones include one first L channel input contact, one second L channel input contact, one the
One right channel input contact, one second right channel input contact, a left ear earphone and an auris dextra earphone, the headphone amplifier circuit
Including：
One audio frequency processing circuit, for generating a left monaural audio signal and an auris dextra audio signal；And
An at least phase regulator, is coupled to the audio frequency processing circuit, and for respectively to the left monaural audio signal and should
Auris dextra audio signal is adjusted into horizontal phasing control with producing identical with the left monaural audio signal amplitude and opposite in phase one first
Entire signal and a second adjustment signal identical and opposite in phase with the auris dextra audio signal amplitude.
2. headphone amplifier circuit according to claim 1, the wherein headphone amplifier circuit are disposed on an integrated electricity
Lu Zhong, and one first L channel output contact, one second L channel output contact, one first right channel are included on the integrated circuit
Output contact and one second right channel output contact, to be used for connecing with first L channel input on the individual earphones respectively
Point, second L channel input contact, first right channel input contact and second right channel input contact are connected.
3. headphone amplifier circuit according to claim 2, wherein when the individual earphones are used for playing the sound of the L channel
During sound, the left monaural audio signal caused by the audio frequency processing circuit will be defeated via first L channel on the integrated circuit
Go out contact and first L channel input contact on the individual earphones, to be transferred in the left ear earphone；Meanwhile the phase tune
The first adjustment signal identical with the left monaural audio signal amplitude and opposite in phase gone out produced by whole device, then can be via the collection
Contact is inputted into second L channel on the second L channel output contact on circuit and the individual earphones, to be transferred to this
In left ear earphone.
4. headphone amplifier circuit according to claim 2, wherein when the individual earphones are used for playing the sound of the right channel
During sound, the auris dextra audio signal caused by the audio frequency processing circuit will be defeated via first right channel on the integrated circuit
Go out contact and first right channel input contact on the individual earphones, to be transferred in the auris dextra earphone；Meanwhile the phase tune
The second adjustment signal identical with the auris dextra audio signal amplitude and opposite in phase gone out produced by whole device, then can be via the collection
Contact is inputted into second right channel on the second right channel output contact on circuit and the individual earphones, to be transferred to this
In auris dextra earphone.
5. a kind of operating method for the headphone amplifier circuit for being used for an individual earphones, the wherein individual earphones are used for playing a left side
The sound of sound channel and/or a right channel, and the individual earphones include one first L channel input contact, the input of one second L channel
Contact, one first right channel input contact, one second right channel input contact, a left ear earphone and an auris dextra earphone, the operation
Method includes：
Using an audio frequency processing circuit, a left monaural audio signal and an auris dextra audio signal are generated；And
Using an at least phase regulator, to carry out phase tune to the left monaural audio signal and the auris dextra audio signal respectively
It is whole, with produce identical with the left monaural audio signal amplitude and opposite in phase a first adjustment signal and with the auris dextra sound
Frequency signal amplitude is identical and a second adjustment signal of opposite in phase.
6. operating method according to claim 5, the wherein headphone amplifier circuit are disposed in an integrated circuit, and
It is connect on the integrated circuit comprising one first L channel output contact, one second L channel output contact, the output of one first right channel
Point and one second right channel output contact, to be used for inputting contact with first L channel on the individual earphones respectively, be somebody's turn to do
Second L channel input contact, first right channel input contact and second right channel input contact are connected.
7. operating method according to claim 6, further includes：
When the individual earphones are used for playing the sound of the L channel, connect using first L channel output on the integrated circuit
Point inputs contact with first L channel on the individual earphones, and the left power of hearing frequency caused by the audio frequency processing circuit is believed
It number is transferred in the left ear earphone；Meanwhile utilize the second L channel output contact on the integrated circuit and the individual earphones
On second L channel input contact, the first adjustment signal gone out produced by the phase regulator is transferred to the left ear
In earphone.
8. operating method according to claim 6, further includes：
When the individual earphones are used for playing the sound of the right channel, connect using first right channel output on the integrated circuit
Point inputs contact with first right channel on the individual earphones, and the auris dextra audio caused by the audio frequency processing circuit is believed
It number is transferred in the auris dextra earphone；Meanwhile utilize the second right channel output contact on the integrated circuit and the individual earphones
On second right channel input contact, the second adjustment signal gone out produced by the phase regulator is transferred to the auris dextra
In earphone.
9. a kind of Headphone device for having general-purpose serial bus USB interface, including：
One USB plug, for being combined with the USB socket on a main frame；
One USB digital quantizers, for providing the number to come received from the main frame by the USB plug
Usb signal, and the number usb signal is converted into an audio digital signals；
One digital analog converter is coupled to the USB digital quantizers, and for the audio digital signals are converted into one
Audio analog signals；
One headphone amplifier circuit is coupled to the digital analog converter, and for producing a left monaural audio signal, a right side
Monaural audio signal, a first adjustment signal and a second adjustment signal；And
One individual earphones are coupled to the headphone amplifier circuit, and the sound for playing a L channel and/or a right channel
It is defeated that sound, the wherein individual earphones include one first L channel input contact, one second L channel input contact, one first right channel
Enter contact, one second right channel input contact, a left ear earphone and an auris dextra earphone, and the headphone amplifier circuit includes：
One audio frequency processing circuit, for according to the audio digital signals, to produce the left monaural audio signal and the auris dextra audio
Signal；And
An at least phase regulator, is coupled to the audio frequency processing circuit, and for respectively to the left monaural audio signal and should
Auris dextra audio signal is into horizontal phasing control, to produce first tune identical with the left monaural audio signal amplitude and opposite in phase
Entire signal and the second adjustment signal identical and opposite in phase with the auris dextra audio signal amplitude.
10. Headphone device according to claim 9, the wherein headphone amplifier circuit are disposed in an integrated circuit,
And one first L channel output contact, one second L channel output contact, the output of one first right channel are included on the integrated circuit
Contact and one second right channel output contact, be used for respectively on the individual earphones first L channel input contact,
Second L channel input contact, first right channel input contact and second right channel input contact are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611245592.9A CN108260040B (en) | 2016-12-29 | 2016-12-29 | Headphone amplifier circuit, method of operating the same, and headphone apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611245592.9A CN108260040B (en) | 2016-12-29 | 2016-12-29 | Headphone amplifier circuit, method of operating the same, and headphone apparatus |
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| CN108260040A true CN108260040A (en) | 2018-07-06 |
| CN108260040B CN108260040B (en) | 2020-07-14 |
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Cited By (1)
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