CN209233999U - A kind of phantom power for microphone power - Google Patents
A kind of phantom power for microphone power Download PDFInfo
- Publication number
- CN209233999U CN209233999U CN201822092893.3U CN201822092893U CN209233999U CN 209233999 U CN209233999 U CN 209233999U CN 201822092893 U CN201822092893 U CN 201822092893U CN 209233999 U CN209233999 U CN 209233999U
- Authority
- CN
- China
- Prior art keywords
- power
- electrolytic capacitor
- microphone
- output end
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The utility model provides a kind of phantom power for microphone power, including usb circuit, voltage doubling rectifing circuit and audio decoder chip, the usb circuit is connect with the audio decoder chip, the audio data of the audio decoder chip (U1) is sent to terminal device, external input power is accessed in described rectification circuit one end, and rectifier boost is carried out to the external input power, power supply power supply is provided for microphone.The phantom power is inputted using external power supply, interference of the AC ripple to voicefrequency circuit is reduced, while by voltage doubling rectifing circuit, can guarantee that supply voltage is stablized, and terminal device such as computer, mobile phone etc. can also extract the sound source data of audio chip transmission by usb circuit.
Description
Technical field
The utility model relates to microphone spare and accessory parts field more particularly to a kind of phantom powers for microphone power.
Background technique
Capacitance microphone is generally made of capacitor cartridge and prime amplifier two parts, and capacitor cartridge needs a polarization electricity
Pressure, prime amplifier are also required to electricity consumption, and the power supply needed for them is all carried by signal wire and supplied, and does not give audio when supplying power supply
The problem of signal transmission interferes, such power supply mode is known as Phantom Power.
Existing phantom power has 12V, 24V and 48V power supply, and in power supply process, AC ripple is easy to audio-frequency electric
Road generates interference, while there is also unstable situations for voltage, once voltage is not sufficiently stable, cannot provide corresponding voltage electricity
Stream is easy to influence the normal work of microphone.
Summary of the invention
The technical problems to be solved in the utility model is designed to provide a kind of phantom power for microphone power, uses
Interference tones circuit, supply voltage are unstable when solving the problems, such as the power supply of existing phantom power.
To achieve the goals above, the technical solution adopted in the utility model is as follows:
A kind of phantom power for microphone power, including shell, be provided in the shell usb circuit, times
Voltage rectifier and audio decoder chip,
The usb circuit is connect with the audio decoder chip, by the audio data of the audio decoder chip U1
It is sent to terminal device, external input power is accessed in described voltage doubling rectifing circuit one end, and carries out to the external input power
Rectifier boost provides power supply power supply for microphone.
Preferably, it is provided with the second connector J2 in the usb circuit, passes through the second interface J2 and terminal device
Connection, the second connector J2 are connect with one end of the 9th resistance R9, one end of the tenth resistance R10 and eleventh resistor R11 respectively,
Wherein, one end of the 9th resistance R9 and one end of the tenth resistance R10 interconnect, the other end and audio decoder of the 9th resistance R9
23 pins of chip U1 connect, the 20th pin connection of the other end sound decoding chip U1 of the tenth resistance R10, and the 11st
The other end of resistance R11 is connect with the 21st pin of audio decoder chip U1.
Preferably, the audio decoder chip model is CM7327A.
Preferably, the 17th pin of the audio decoder chip U1 and the 18th pin are connected with memory chip
U2, the memory chip U2 model FM24C02.
Preferably, the first connector JP1 is provided in the voltage doubling rectifing circuit, the first connector access has external power supply
And one end of switch SW1, another input terminal for being terminated with first diode D1 of the switch SW1 and the first electrolytic capacitor
The output end of C1, the output of first diode D1 be terminated with the second electrolytic capacitor C2 output end and the second diode D2 it is defeated
Enter end, the output end of the second diode D2 is connected with the input of the input terminal and third diode D3 of the first electrolytic capacitor C1
End, the output end of the second electrolytic capacitor C2 are connected with the collector of the 5th triode Q5 and the output end of third diode D3,
The output end of third transistor D3 is also connected with the base stage of the 5th triode Q5, and the emitter of the 5th triode Q5 is connected with the 7th
The input terminal of the input terminal of electrolytic capacitor C7 and the 8th electrolytic capacitor C8, the output end of the 7th electrolytic capacitor C7 and the 8th electricity
The output end of solution capacitor C8 is connect to provide regulated power supply with microphone.
Preferably, the 7th electrolytic capacitor C7 and the 8th electrolytic capacitor C8 are in parallel, the output of the 7th electrolytic capacitor C7
End is the first output port of power source, and the output end of the 8th electrolytic capacitor C8 is second source output port.
Preferably, the output end of the 7th electrolytic capacitor C7 is also connected with one end and the 12nd of the tenth capacitor C10
One end of resistance R12, the other end ground connection of the tenth capacitor C10, the other end ground connection of twelfth resistor R12, the 8th electrolysis
The output end of capacitor C8 is also connected with one end of the 9th capacitor C9 and one end of the 9th resistance R9, the other end of the 9th capacitor C9
Ground connection, the other end ground connection of the 9th resistance R9.
Preferably, the output end of the first diode D1 be also connected with the 11st electrolytic capacitor C11 input terminal and
One end of first resistor R1, the output end ground connection of the 11st electrolytic capacitor C11, the other end of first resistor R1 are connected with the 4th hair
The input terminal of optical diode D4, the output end of the 4th light emitting diode D4 are grounded after connecting with one end of the first inductance L1, the
The other end of one inductance L1 is grounded after connecting with first interface J1.
Preferably, the supply voltage of the phantom power is 48V.
The utility model reduces interference of the AC ripple to voicefrequency circuit, adopts simultaneously by providing external input power
It with voltage doubling rectifing circuit, can guarantee voltage stabilization, and have the supply port of two groups of balances, Differential Output input signal makes
It is more steady to obtain voltage, is able to suppress common mode interference.
Detailed description of the invention
Fig. 1 is a kind of phantom power system structure diagram of microphone power provided by the utility model；
Fig. 2 is the circuit diagram of audio chip and usb circuit provided by the utility model；
Fig. 3 is secondary voltage doubling rectifing circuit schematic diagram provided by the utility model.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
Embodiment one
Referring to figs. 1 to Fig. 3, a kind of phantom power for microphone power, including shell are present embodiments provided, wherein
Circuit board is provided in shell, circuit board includes usb circuit, voltage doubling rectifing circuit and audio decoder chip.
Usb circuit is connect with audio decoder chip, and the audio data of audio decoder chip U1 is sent to terminal and is set
Standby, external input power is accessed in rectification circuit one end, and carries out rectifier boost to external input power, provides power supply for microphone
Power supply.
With reference to Fig. 1, multiple connectors are provided on phantom power shell, it can be with microphone, sound console and terminal device
(such as computer, mobile phone and tablet computer etc.) connection, phantom power provide power supply for microphone and sound console.
It is wherein further connected with external ac-input power supply in phantom power, under normal circumstances, first passes through power supply adaptor to city
Electric (220V) carries out decompression processing, then could be used as ac-input power supply, provide power supply for phantom power.
In the present embodiment, phantom power is 48V supply voltage, is powered for microphone and sound console etc..
Microphone is capacitance microphone simultaneously, electric signal is generated by the vibration that sound in environment generates, at amplification
After reason, it is transferred to the intracorporal audio decoder chip U1 of phantom power shell, to carry out audio decoder.
Phantom power can guarantee while for microphone power, moreover it is possible to guarantee that voicefrequency circuit is interference-free, and outer
Setting input power is ac-input power supply, can effectively reduce interference of the AC ripple to voicefrequency circuit, reduces signal bottom and makes an uproar.
After usb circuit is connect with audio decoder chip U1, can with terminal device such as computer, mobile phone etc. even
It connects, realizes the data communication between audio decoder chip U1 and terminal device, facilitate the collected sound source data hair of microphone
Terminal device is sent to record.
With reference to Fig. 2, Fig. 2 is the circuit diagram of the intracorporal audio chip of phantom power shell and usb circuit, this reality
It applies in example, the second connector J2 is provided in usb circuit, connect by second interface J2 with terminal device, the second connector J2
It is connect respectively with one end of the 9th resistance R9, one end of the tenth resistance R10 and eleventh resistor R11, wherein the 9th resistance R9
One end and one end of the tenth resistance R10 interconnect, 23 pins of the other end of the 9th resistance R9 and audio chip U1
Connection, the 20th pin connection of the other end audio decoder chip U1 of the tenth resistance R10, the other end of eleventh resistor R11
It is connect with the 21st pin of audio decoder chip U1.
Second connector J2 has 5 interfaces, be also connected on interface 1 inductance L1, inductance L2, inductance L3, electrolytic capacitor C1,
Capacitor C2, capacitor 4, capacitor C5 and capacitor C6 are also connected with capacitor C21 and capacitor C22 on interface 2, the 9th resistance R9's
The other end is also connected with capacitor C25, and interface 4 and interface 5 are grounded.
Wherein, the component connection type in usb circuit can intuitively be obtained clearly in Fig. 2, herein
Detailed explanatory note is not done.
In the present embodiment, audio decoder chip model is CM7327A.
As shown in Fig. 2, the 17th pin and the 18th pin of audio decoder chip U1 are connected with memory chip U2,
Memory chip U2 model FM24C02.
As shown in figure 3, being provided with the first connector JP1 in secondary voltage doubling rectifing circuit, the access of the first connector has external power supply
And one end of switch SW1, another input terminal for being terminated with first diode D1 of switch SW1 and the first electrolytic capacitor C1's
Output end, the output of first diode D1 are terminated with the input of the output end and the second diode D2 of the second electrolytic capacitor C2
End, the output end of the second diode D2 are connected with the input terminal of the first electrolytic capacitor C1 and the input terminal of third diode D3,
The output end of second electrolytic capacitor C2 is connected with the collector of the 5th triode Q5 and the output end of third diode D3, third
The output end of triode D3 is also connected with the base stage of the 5th triode Q5, and the emitter of the 5th triode Q5 is connected with the 7th electrolysis
The input terminal of the input terminal of capacitor C7 and the 8th electrolytic capacitor C8, the output end of the 7th electrolytic capacitor C7 and the 8th electrolysis electricity
The output end for holding C8 is connect to provide regulated power supply with microphone.
7th electrolytic capacitor C7 and the 8th electrolytic capacitor C8 are in parallel, and the output end of the 7th electrolytic capacitor C7 is the first power supply
Output port, the output end of the 8th electrolytic capacitor C8 are second source output port.
By the output port of power source of two groups of balances, it can guarantee that power balancing is stablized, while inhibiting the production of common mode interference
It is raw.
In a preferable real-time mode, the output end of the 7th electrolytic capacitor C7 is also connected with the one of the tenth capacitor C10
End and one end of twelfth resistor R12, the other end ground connection of the tenth capacitor C10, the other end ground connection of twelfth resistor R12,
The output end of 8th electrolytic capacitor C8 is also connected with one end of the 9th capacitor C9 and one end of the 9th resistance R9, the 9th capacitor C9
The other end ground connection, the 9th resistance R9 the other end ground connection.
In another preferable embodiment, the output end of first diode D1 is also connected with the 11st electrolytic capacitor
The input terminal of C11 and one end of first resistor R1, the output end ground connection of the 11st electrolytic capacitor C11, first resistor R1's is another
One end is connected with the input terminal of the 4th light emitting diode D4, one end of the output end of the 4th light emitting diode D4 and the first inductance L1
It is grounded after connection, the other end of the first inductance L1 is grounded after connecting with first interface J1.
With reference to the secondary voltage doubling rectifing circuit in Fig. 2, be additionally provided in circuit capacitor C12, electrolytic capacitor C3, resistance R3,
Electrolytic capacitor C4, capacitor C6, resistance R4, resistance R7, resistance R8 and resistance R2, wherein the connection type of each component can be from
It is directly obtained in Fig. 2, no longer carries out detailed explanatory note herein.
One end of resistance R2, the other end of resistance R2 and the five or three pole are wherein connected on the output end of third diode D3
Pipe Q5 connection, is also connected with the 5th diode D5 and the 5th electrolytic capacitor C5.
The connection type between each pin of audio decoder chip U1 is also shown in the present embodiment, in Fig. 2, herein not
Do explanatory note.
Phantom power in the present embodiment reduces AC ripple to audio by the way that external input power (AC input) is arranged
The interference of circuit, while voltage doubling rectifing circuit is used, it can guarantee voltage stabilization, and have the supply port of two groups of balances, put down
Weighing apparatus output input signal is able to suppress common mode interference so that voltage is more steady.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (9)
1. a kind of phantom power for microphone power, including shell, which is characterized in that be provided with USB in the shell and connect
Mouth circuit, voltage doubling rectifing circuit and audio decoder chip,
The usb circuit is connect with the audio decoder chip, and the audio data of the audio decoder chip (U1) is sent out
It send to terminal device, external input power is accessed in described voltage doubling rectifing circuit one end, and carries out to the external input power whole
Stream boosting, provides power supply power supply for microphone.
2. a kind of phantom power for microphone power according to claim 1, which is characterized in that the USB interface
It is provided with the second connector (J2) in circuit, is connect by second connector (J2) with terminal device, the second connector (J2) is respectively
It is connect with one end of the 9th resistance (R9), one end of the tenth resistance (R10) and eleventh resistor (R11), wherein the 9th resistance
(R9) one end of one end and the tenth resistance (R10) interconnects, the other end and audio decoder chip of the 9th resistance (R9)
(U1) 23 pins connection, the 20th pin connection of the other end sound decoding chip (U1) of the tenth resistance (R10), the tenth
The other end of one resistance (R11) is connect with the 21st pin of audio decoder chip (U1).
3. a kind of phantom power for microphone power according to claim 1, which is characterized in that the audio decoder
Chip model is CM7327A.
4. a kind of phantom power for microphone power according to claim 3, which is characterized in that the audio decoder
The 17th pin and the 18th pin of chip (U1) are connected with memory chip (U2), memory chip (U2) model
For FM24C02.
5. a kind of phantom power for microphone power according to claim 1, which is characterized in that the voltage multiplying rectifier
It is provided in circuit the first connector (JP1), the first connector access has external power supply and switchs the one end of (SW1), described
Another input terminal for being terminated with first diode (D1) of switch (SW1) and the output end of the first electrolytic capacitor (C1), first
The output of diode (D1) is terminated with the output end of the second electrolytic capacitor (C2) and the input terminal of the second diode (D2), and second
The output end of diode (D2) is connected with the input terminal of the first electrolytic capacitor (C1) and the input terminal of third diode (D3), the
The output end of two electrolytic capacitors (C2) is connected with the collector of the 5th triode (Q5) and the output end of third diode (D3),
The output end of third transistor (D3) is also connected with the base stage of the 5th triode (Q5), the emitter connection of the 5th triode (Q5)
There are the input terminal of the 7th electrolytic capacitor (C7) and the input terminal of the 8th electrolytic capacitor (C8), the output of the 7th electrolytic capacitor (C7)
The output end of end and the 8th electrolytic capacitor (C8) is connect to provide regulated power supply with microphone.
6. a kind of phantom power for microphone power according to claim 5, which is characterized in that the 7th electrolysis
Capacitor (C7) and the 8th electrolytic capacitor (C8) are in parallel, and the output end of the 7th electrolytic capacitor (C7) is the first output port of power source,
The output end of 8th electrolytic capacitor (C8) is second source output port.
7. a kind of phantom power for microphone power according to claim 5, which is characterized in that the 7th electrolysis
The output end of capacitor (C7) is also connected with one end of the tenth capacitor (C10) and one end of twelfth resistor (R12), the tenth capacitor
(C10) other end ground connection, the other end ground connection of twelfth resistor (R12), the output end of the 8th electrolytic capacitor (C8) is also
It is connected with one end of the 9th capacitor (C9) and one end of the 9th resistance (R9), the other end of the 9th capacitor (C9) is grounded, and the 9th
The other end of resistance (R9) is grounded.
8. a kind of phantom power for microphone power according to claim 5, which is characterized in that the one or two pole
The output end of pipe (D1) is also connected with the input terminal of the 11st electrolytic capacitor (C11) and one end of first resistor (R1), and the tenth
The output end of one electrolytic capacitor (C11) is grounded, and the other end of first resistor (R1) is connected with the defeated of the 4th light emitting diode (D4)
Enter end, the output end of the 4th light emitting diode (D4) is grounded after connecting with one end of the first inductance (L1), the first inductance (L1)
The other end connect with first interface (J1) after be grounded.
9. a kind of phantom power for microphone power according to claim 1, which is characterized in that the phantom power
Supply voltage be 48V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092893.3U CN209233999U (en) | 2018-12-13 | 2018-12-13 | A kind of phantom power for microphone power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822092893.3U CN209233999U (en) | 2018-12-13 | 2018-12-13 | A kind of phantom power for microphone power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209233999U true CN209233999U (en) | 2019-08-09 |
Family
ID=67507497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822092893.3U Active CN209233999U (en) | 2018-12-13 | 2018-12-13 | A kind of phantom power for microphone power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209233999U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113613111A (en) * | 2021-08-27 | 2021-11-05 | 音曼（北京）科技有限公司 | Microphone device and audio processing system |
| CN114786112A (en) * | 2022-06-22 | 2022-07-22 | 广州市保伦电子有限公司 | Equipment detection device of external phantom power supply simulation microphone |
-
2018
- 2018-12-13 CN CN201822092893.3U patent/CN209233999U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113613111A (en) * | 2021-08-27 | 2021-11-05 | 音曼（北京）科技有限公司 | Microphone device and audio processing system |
| CN114786112A (en) * | 2022-06-22 | 2022-07-22 | 广州市保伦电子有限公司 | Equipment detection device of external phantom power supply simulation microphone |
| CN114786112B (en) * | 2022-06-22 | 2022-10-11 | 广州市保伦电子有限公司 | Equipment detection device of external phantom power supply simulation microphone |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209233999U (en) | A kind of phantom power for microphone power | |
| CN209265383U (en) | A kind of Power conversion board for server | |
| WO2012171495A1 (en) | Audio signal adapter device | |
| CN209328491U (en) | It is a kind of can integrated control LED display screen system device | |
| CN111443778A (en) | Multifunctional computer support | |
| CN207124680U (en) | A kind of external camera assembly | |
| CN214338053U (en) | External device for voice control of set top box | |
| CN206039739U (en) | HOSTUSB function sharing circuit that charges | |
| CN201113097Y (en) | Power supply line/net twine two-in-one device for notebook computer | |
| CN210078848U (en) | Multifunctional piano toy | |
| CN208421812U (en) | A kind of electronic interface modules | |
| CN211087882U (en) | Calling display screen | |
| CN112581809A (en) | Classroom all-in-one machine equipment | |
| CN218886500U (en) | Multifunctional USB-C docking station | |
| CN210670104U (en) | Power supply and data transmission integrated device and intelligent product assembly | |
| CN212012160U (en) | One drags many and fills wire rod soon | |
| CN212084657U (en) | Dual-channel off-line and on-line integrated voice control circuit | |
| CN208705875U (en) | A kind of optic module turns the device of FC hard-disk interface | |
| CN204124967U (en) | A kind of electronics alarm device of elevator | |
| CN204925753U (en) | Instrument monitored control system | |
| CN218415245U (en) | Mobile phone data line with anti-information screen and evidence obtaining system | |
| CN212344040U (en) | PC desktop built-in sound equipment using front audio signal | |
| CN203027412U (en) | Alternating-current and direct-current double-purpose active integrated loudspeaker box | |
| CN216774968U (en) | Multi-input control microphone circuit | |
| CN219958185U (en) | Small-sized device for detecting user fatigue in VR scene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |