CN207491189U - A kind of double words put the external sound cards of USB2.0 - Google Patents
A kind of double words put the external sound cards of USB2.0 Download PDFInfo
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- CN207491189U CN207491189U CN201721644108.XU CN201721644108U CN207491189U CN 207491189 U CN207491189 U CN 207491189U CN 201721644108 U CN201721644108 U CN 201721644108U CN 207491189 U CN207491189 U CN 207491189U
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Abstract
The utility model discloses a kind of double words and puts the external sound cards of USB2.0, including casing and power control board, power control board includes microphone input channel, first low-pass filter circuit, A/D converter, dsp processor, USB codecs, D/A converter, second low-pass filter circuit, earphone output channel, Differential Output channel, microphone input channel includes phantom power, differential amplifier circuit and microphone input interface, earphone output channel includes headset output interface, balanced output circuit includes balanced output circuit and the multimedia loudspeaker box interface being arranged on casing and monitor speaker interface, USB2.0 communication charging interfaces are additionally provided on casing, USB2.0 communication charging interfaces are electrically connected by USB codecs with dsp processor.The utility model has multiple output channels, provides power supply by USB interface, without other power supplys, and configuration is succinctly reasonable, and properties of product are reliable and stable.
Description
Technical field
The utility model is related to sound card equipment technical fields more particularly to a kind of double words to put the external sound cards of USB2.0.
Background technology
At present, sound card of the prior art is single due to the relatively low also original certain limitation to primary sound of sample rate
Interface circuit can not meet the requirement of client, and simple function is not already adapted to the demand in market.
Therefore, the prior art is defective, needs to improve.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of double words and put the external sound cards of USB2.0,
It provides power supply, without other power supplys, and configuration is succinctly reasonable, product with multiple output channels by USB interface
It can be reliable and stable.
The technical solution of the utility model is as follows：A kind of double words put the external sound cards of USB2.0, including the interior machine for setting locker room
Shell includes two microphone input channels, the first low pass with the indoor power control board of storage, the power control board is installed in
Filter circuit, A/D converter, dsp processor, USB codecs, D/A converter, the second low-pass filter circuit, an earphone are defeated
Go out channel and a Differential Output channel, the microphone input channel includes phantom power, differential amplifier circuit and is arranged on
Microphone input interface on casing, the microphone input interface pass through differential amplifier circuit and the first low-pass filter circuit
Input terminal is electrically connected, and the output terminal of the phantom power is electrically connected with microphone input interface, second low-pass filter circuit
It passes sequentially through D/A converter, dsp processor, A/D converter to be electrically connected with the output terminal of the first low-pass filter circuit, the ear
Machine output channel includes the headset output interface being arranged on casing, the headset output interface and the second low-pass filter circuit
Output terminal is electrically connected, the Differential Output channel include balanced output circuit and the multimedia loudspeaker box interface that is arranged on casing and
Monitor speaker interface, the multimedia loudspeaker box interface, monitor speaker interface are electrically connected with the output terminal of balanced output circuit, described
The input terminal of balanced output circuit is electrically connected with the second low-pass filter circuit, and USB2.0 communication chargings are additionally provided on the casing
Interface, the USB2.0 communications charging interface are electrically connected by USB codecs with dsp processor.
Further, phantom power switch is also electrically connected between the phantom power and microphone input interface, it is described
Phantom power switch is arranged on casing, and phantom power indicator light, the phantom power indicator light are additionally provided on the casing
It is electrically connected with the output terminal of phantom power switch.
Further, the microphone input channel further includes the gain-adjusted knob being arranged on casing, the gain
The output terminal of adjusting knob is electrically connected with differential amplifier circuit.
Further, incoming level indicator light and output level indicator light, the incoming level are provided on the casing
Indicator light is electrically connected with the output terminal of the first low-pass filter circuit, the output of the output level indicator light and balanced output circuit
End electrical connection.
Further, the earphone output channel further includes the earpiece volume knob being arranged on casing, the earphone sound
Amount knob is connected electrically between the second low-pass filter circuit and headset output interface.
Further, the Differential Output channel further includes the total output volume knob being arranged on casing, described total defeated
Go out volume knob to be connected electrically between the second low-pass filter circuit and balanced output circuit.
Further, power switch and power supply indicator are provided on the casing, the power switch leads to USB2.0
Believe the input terminal electrical connection of charging interface, the power supply indicator is electrically connected with the output terminal of USB2.0 communication charging interfaces.
Relative to the prior art, the beneficial effects of the utility model are：There are two independent Mikes for the utility model tool
Wind input channel, an earphone output channel and a Differential Output channel, the Differential Output channel are equipped with multiple output interfaces, packet
Multimedia loudspeaker box interface and monitor speaker interface are included, the requirement of different clients can be met, power supply is communicated by USB2.0
Charging interface provides power supply, and without other power supplys, the utility model configuration is succinctly reasonable, and properties of product are reliable and stable.
Description of the drawings
Fig. 1 is one of structure diagram of the utility model；
Fig. 2 is the second structural representation of the utility model；
Fig. 3 is the structural principle block diagram of the utility model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
~3 are please referred to Fig.1, the double words of one kind of the utility model put the external sound cards of USB2.0, including the interior machine for setting locker room
Shell 1 includes two microphone input channels 21, the first low pass filtered with the indoor power control board of storage, power control board is installed in
Wave circuit 22, A/D converter 23, dsp processor 24, USB codecs 25, D/A converter 26, the second low-pass filter circuit
27th, an earphone output channel 28 and a Differential Output channel 29, microphone input channel 21 include phantom power 211, difference
Amplifying circuit 212 and the microphone input interface 213 being arranged on casing 1, microphone input interface 213 pass through differential amplification electricity
Road 212 is electrically connected with the input terminal of the first low-pass filter circuit 22, output terminal and the microphone input interface of phantom power 211
213 electrical connections, the second low-pass filter circuit 27 pass sequentially through D/A converter 26, dsp processor 24, A/D converter 23 and first
The output terminal electrical connection of low-pass filter circuit 22, earphone output channel 28 include the headset output interface being arranged on casing 1
281, headset output interface 281 is electrically connected with the output terminal of the second low-pass filter circuit 27, and Differential Output channel 29 includes balance
Output circuit 291 and the multimedia loudspeaker box interface 292 being arranged on casing 1 and monitor speaker interface 293, multimedia loudspeaker box interface
292nd, monitor speaker interface 293 is electrically connected with the output terminal of balanced output circuit 291, the input terminal of balanced output circuit 291 with
Second low-pass filter circuit 27 is electrically connected, and USB2.0 communication charging interfaces 11, USB2.0 communication chargings are additionally provided on casing 1
Mouth 11 is electrically connected by USB codecs 3 with dsp processor 24.
With twin-channel microphone input interface 213, using differential amplifier circuit 212, no bottom makes an uproar/dynamic greatly,
Meet the record of any profession；There are two the monitor speaker interface 293 is set, a pair of professional monitor speaker can be connect；Institute
The small three cores delivery outlet that multimedia loudspeaker box interface 292 is 3.5 is stated, common multimedia speaker can be connect；Its power supply passes through USB2.0
Communication charging interface 11 supplies to provide power supply, without other power supplys.
Phantom power switch 214, phantom power are also electrically connected between phantom power 211 and microphone input interface 213
211 switches are arranged on casing 1, and phantom power indicator light 215, phantom power indicator light 215 and mirage are additionally provided on casing 1
The output terminal electrical connection of power switch 214.
Microphone input channel 21 further includes the gain-adjusted knob 216 being arranged on casing, gain-adjusted knob 216
Output terminal is electrically connected with differential amplifier circuit 212.
Incoming level indicator light 4 and output level indicator light 5 are provided on casing 1, incoming level indicator light 4 is low with first
The output terminal electrical connection of bandpass filter circuit 22, output level indicator light 5 are electrically connected with the output terminal of balanced output circuit 291.
Earphone output channel 28 further includes the earpiece volume knob 282 being arranged on casing 1,282 electricity of earpiece volume knob
It is connected between the second low-pass filter circuit 27 and headset output interface 281.
Differential Output channel 29 further includes the total output volume knob 294 being arranged on casing 1, total output volume knob
294 are connected electrically between the second low-pass filter circuit 27 and balanced output circuit 291.It is adopted around total output volume knob 294
With dynamic LED level display lamp, with the increase of volume, LED light gradually brightens.
It is provided with power switch 6 and power supply indicator 7 on casing 1, power switch 6 communicates charging interface 11 with USB2.0
Input terminal is electrically connected, and power supply indicator 7 is electrically connected with the output terminal of USB2.0 communication charging interfaces 11.
The utility model configuration is succinctly reasonable, and properties of product are reliable and stable.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality
All any modification, equivalent and improvement made within novel spirit and principle etc., should be included in the guarantor of the utility model
Within the scope of shield.
Claims (7)
1. a kind of double words put the external sound cards of USB2.0, including the interior casing for setting locker room and it is installed in the indoor power supply control of storage
Plate, it is characterised in that：The power control board includes two microphone input channels, the first low-pass filter circuit, A/D conversions
Device, dsp processor, USB codecs, D/A converter, the second low-pass filter circuit, an earphone output channel and a balance
Output channel, it is defeated that the microphone input channel includes phantom power, differential amplifier circuit and the microphone that is arranged on casing
Incoming interface, the microphone input interface are electrically connected by differential amplifier circuit with the input terminal of the first low-pass filter circuit, institute
The output terminal for stating phantom power is electrically connected with microphone input interface, and second low-pass filter circuit passes sequentially through D/A conversions
Device, dsp processor, A/D converter are electrically connected with the output terminal of the first low-pass filter circuit, and the earphone output channel includes setting
The headset output interface on casing is put, the headset output interface is electrically connected with the output terminal of the second low-pass filter circuit, institute
It states Differential Output channel and includes balanced output circuit and the multimedia loudspeaker box interface being arranged on casing and monitor speaker interface, institute
State multimedia loudspeaker box interface, monitor speaker interface is electrically connected with the output terminal of balanced output circuit, the balanced output circuit
Input terminal is electrically connected with the second low-pass filter circuit, and USB2.0 communication charging interfaces are additionally provided on the casing, described
USB2.0 communication charging interfaces are electrically connected by USB codecs with dsp processor.
2. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：The phantom power and wheat
Phantom power switch is also electrically connected between gram wind input interface, the phantom power switch is arranged on casing, the casing
On be additionally provided with phantom power indicator light, the phantom power indicator light is electrically connected with the output terminal that phantom power switchs.
3. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：The microphone input is led to
Road further includes the gain-adjusted knob being arranged on casing, and the output terminal of the gain-adjusted knob is electrically connected with differential amplifier circuit
It connects.
4. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：It is provided on the casing
The output terminal electricity of incoming level indicator light and output level indicator light, the incoming level indicator light and the first low-pass filter circuit
Connection, the output level indicator light are electrically connected with the output terminal of balanced output circuit.
5. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：The earphone output channel
The earpiece volume knob being arranged on casing is further included, the earpiece volume knob is connected electrically in the second low-pass filter circuit and ear
Between machine output interface.
6. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：The Differential Output channel
The total output volume knob being arranged on casing is further included, total output volume knob is connected electrically in the second low-pass filter circuit
Between balanced output circuit.
7. a kind of double words according to claim 1 put the external sound cards of USB2.0, it is characterised in that：It is provided on the casing
Power switch and power supply indicator, the power switch are electrically connected with the input terminal of USB2.0 communication charging interfaces, the power supply
Indicator light is electrically connected with the output terminal of USB2.0 communication charging interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721644108.XU CN207491189U (en) | 2017-11-30 | 2017-11-30 | A kind of double words put the external sound cards of USB2.0 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721644108.XU CN207491189U (en) | 2017-11-30 | 2017-11-30 | A kind of double words put the external sound cards of USB2.0 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207491189U true CN207491189U (en) | 2018-06-12 |
Family
ID=62473108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721644108.XU Active CN207491189U (en) | 2017-11-30 | 2017-11-30 | A kind of double words put the external sound cards of USB2.0 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207491189U (en) |
-
2017
- 2017-11-30 CN CN201721644108.XU patent/CN207491189U/en active Active
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