CN202679572U - Recording microphone - Google Patents
Recording microphone Download PDFInfo
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- CN202679572U CN202679572U CN 201220342143 CN201220342143U CN202679572U CN 202679572 U CN202679572 U CN 202679572U CN 201220342143 CN201220342143 CN 201220342143 CN 201220342143 U CN201220342143 U CN 201220342143U CN 202679572 U CN202679572 U CN 202679572U
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- audio signal
- sound card
- recording
- recording microphone
- processing module
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Abstract
The utility model discloses a recording microphone, which comprises an audio signal acquisition terminal, an audio signal input processing module, a sound card and a recording output interface, wherein the audio signal input processing module comprises a linear operational amplifier, the audio signal acquisition terminal is connected with the audio signal input processing module, the audio signal input processing module linearly amplifies acquired audio signals and transmits the audio signals to the sound card, and then the audio signals are output to recording equipment by the recording output interface arranged on the sound card. According to the embodiment of the utility model, the stability of an input stage of the recording microphone can be improved, the signals can be amplified and the sensitivity of the recording microphone can be improved. In addition, appropriate components can be used to simplify the circuit design, make products more compact and beautiful and bring convenience to users without sacrificing the functions of the recording microphone.
Description
Technical field
The utility model relates to electronic technology field, relates in particular to a kind of recording microphone.
Background technology
The USB recording microphone is a kind ofly to convert voice signal to device that digital signal is processed through computer again, general prime audio signal processing circuit needs the transistor of high input impedance to realize the order ground of impedance transformation, for matching computer is realized better recording, the USB recording microphone also adds some headphone monitor functions, the signal designation function, mute function, recording and playback translation function, U M280 is exactly a so large vibrating diaphragm professional recording microphone.
At present, the recording microphone input stage mostly adopts metal-oxide-semiconductor, JFET field effect transistor to carry out impedance transformation, and wherein, metal-oxide-semiconductor, JFET pipe input cause and can't record because electrostatic induction produces puncture easily.
In addition, in order to reach good recording effect, existing microphone can add a sound head input signal size control potentiometer, ear sound reproduction sound size control potentiometer, and potentiometer is selected in recording, playback.This just causes the control point too much, has increased the complexity of circuit design, affects the attractive in appearance of product, makes troubles also for simultaneously user's use.
Summary of the invention
The purpose of this utility model provides a kind of recording microphone, and is stable to improve the recording microphone input stage, and can reduce the complexity of circuit design, and can be user-friendly.
The purpose of this utility model is achieved through the following technical solutions:
(corresponding with claim)
Can be found out by the technical scheme that above-mentioned the utility model provides, a kind of recording microphone that the utility model embodiment provides can overcome the problem that prior art exists, improve recording microphone input stage stability, can also amplify signal simultaneously, improve the sensitivity of recording microphone.And the utility model can also use suitable element under the prerequisite of not losing the recording microphone function, simplifies circuit design, makes product smaller and more exquisite, attractive in appearance, brings convenience for the user uses.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The circuit theory schematic diagram of the recording microphone that Fig. 1 provides for the utility model embodiment;
The input stage circuit figure that Fig. 2 provides for the utility model embodiment;
The integrated circuit figure of the recording microphone that Fig. 3 provides for the utility model embodiment;
The external structure schematic diagram that Fig. 4 provides for the utility model embodiment;
The internal structure schematic diagram that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on embodiment of the present utility model, those of ordinary skills belong to protection range of the present utility model not making the every other embodiment that obtains under the creative work prerequisite.
Below in conjunction with accompanying drawing the utility model embodiment is described in further detail.
A kind of recording microphone that the utility model provides, can comprise audio signal sample end, audio signal input processing module, sound card and recording output interface, wherein, the audio signal sample end is connected with the audio signal input processing module, so that sending the audio signal that collects to the audio signal input processing module, processes at the audio signal sample end, audio signal after processing sends sound card to, export to sound pick-up outfit by the recording output interface after by sound card corresponding audio signal being processed, to finish the recording operation to the audio signal that gathers.
As shown in Figure 1, corresponding audio signal sample end can be good membrane capacitance sound head, be used for gathering the audio signal of user's input, corresponding audio signal input processing module is input stage, this input stage is used for the audio signal that gathers is processed, sound card can for the USB sound card (for example, can be the USB sound card of CM6400 for model), so that be connected with the computer equipment that can be used as sound pick-up outfit by corresponding USB interface, if sound card is the USB sound card, the output interface of then recording accordingly can be USB interface, and the audio signal after sound card can will gather and process by USB interface sends the sound pick-up outfits such as computer equipment to.
Particularly, as shown in Figure 2, above-mentioned audio signal input processing module comprises linear operational amplifier, and above-mentioned audio signal input processing module carries out linearity to the audio signal that gathers and amplifies processing and be sent to described sound card, exports to sound pick-up outfit by the recording output interface that arranges on the described sound card again.Further, still with reference to shown in Figure 2, adopting high pass filter that the audio signal that gathers is carried out high-pass filtering in the corresponding audio signal input processing module processes, it is the linear operational amplifier of MAX4251 that described linear operational amplifier adopts model, the reference voltage that the reference power source of operational amplifier adopts described USB sound card to provide.
For example, in Fig. 2, select corresponding capacitor C 1, resistance R 1 and resistance R 23, so that by C1, R1, cut-off frequency F0=1/[2 * the ∏ of R23 composition high pass filter * (R1+R23) * C1] ≈ 15HZ, and the MAX4251 bandwidth of operation is 3MHZ, so input stage circuit shown in Figure 2 meets 20-20kHZ frequency response requirement in the voicefrequency circuit fully, the design of this input stage can realize that input signal gains about 5.7 times, and the reference voltage that the VREF(reference power source of the linear operational amplifier MAX4251 of input stage) adopts the USB sound card to provide can effectively be removed power supply noise.
In input stage, adopt linear operational amplifier can improve the stability of the input stage of recording microphone, can also increase input impedance simultaneously, to realize that the amplification processing of the audio signal that gathers is improved microphone sensitivity.
Still as shown in Figure 1, corresponding sound card also is connected with audio frequency control end and audio output, the audio signal after sound card is processed whether corresponding audio frequency control end will gather for control sends to as the computer of sound pick-up outfit records, corresponding audio output then comprises earphone amplifier section and earphone output, the user is used for frames connecting with headphone, so that can hear audio signal and the background audio signals of collection.With reference to shown in Figure 3, described audio frequency control end comprises with the potentiometer R24(of touch-switch such as the R24A potentiometer among Fig. 3, the R24B touch-switch), wherein, whether touch-switch sends voice signal to computer (being sound pick-up outfit) for control is recorded, and in the time of can not recording, corresponding audio output can not be heard the voice signal that pick-up head gathers, potentiometer then is used for controlling the power output that the audio signal that gathers is exported to audio output, i.e. control is sent to the power of the audio signal of earphone, but do not control the power that sound is given pcs signal (being recorded audio signals), the power of recorded audio signals can be regulated by the control of the recording volume in computer option.Because the audio frequency control end in this recording microphone only adopts with the potentiometer of touch-switch and realizes, can realize microphone earphone signal gain control in conjunction with the CM6400 sound card, can realize the recorded audio signals monitor function again, can also realize the input signal mute function, thereby so that recording microphone can under the prerequisite of not losing earphone function, use suitable element, simplify circuit design, make the product smaller and more exquisite, attractive in appearance, solved in the prior art control point too much and the problem of complex circuit designs.
In Fig. 1, corresponding sound card also is connected with the signal designation part, this signal designation part specifically can comprise the functional indicator light that can send multiple different colours, when corresponding USB sound card is used for finishing difference in functionality, then functional indicator light sends the light of this function corresponding color, being convenient to the user uses, for example, can be with green, blue, red three kinds of colors are indicated respectively mute function, the excessive indication of sound-recording function and input signal, then functional indicator light sends green light when the user enables mute function, functional indicator light sends blue light when the user enables sound-recording function, when input signal is excessive when recording when leading distortion processed, when red can so that the user can clearly be known current function of enabling, be convenient to the user and be selected reliably to use different functions like this.
Further, still as shown in Figure 1, the storage IC(such as the 24C02 that are connected with corresponding USB sound card), this IC can store client LOGO, the signals such as product type, when the USB microphone connects computer, sound in computer---just can see microphone producer, product type (such as Alctron UM280) in the attribute, be convenient to like this which sound pick-up outfit of user selection and record.
As shown in Figure 4, the recording microphone that the utility model provides can also comprise housing 1 and support 2, the circuit board that comprises above-mentioned audio signal sample end, audio signal input processing module and sound card then is arranged in the described housing 1, corresponding support 2 also is installed, to play a supporting role on the housing 1.Further, as shown in Figure 5, above-mentioned potentiometer with touch-switch also arranges in the described housing 1, and touch-switch is connected with knob 12 on being arranged at housing 1, be that knob 12 can be placed on the touch-switch of potentiometer, need only during use and click gently knob 12, just can realize mute function, can only hear the sound (being background audio signals) of computer equipment output this moment, push-turn key 12 gently again, the figure viewed from behind music (being background audio signals) that the sound that can hear simultaneously the sound head and pick up (audio signal that namely gathers) and computer provide can be switched to again, and the operation of regulator potentiometer can also be realized by suitable rotation knob 12.Particularly, can so that output stage provides maximum 100mW power stage, be enough to drive corresponding high-power earphone by regulator potentiometer.
In addition, the recording microphone that provides by the utility model can also contrast the size of two source of sound volumes, regulating two source of sound volumes makes it consistent, for example, when hearing that pick-up head sound than background music hour, can open as sound in the computer of sound pick-up outfit---attribute---audio frequency---sound pick-up outfit, to tune up the input volume, make volume and the background volume in the same size of pick-up head, vice versa, can realize perfect recording effect like this.
Still with reference to shown in Figure 5, corresponding housing 1 comprises loam cake 3, body 11 and base 13, respectively there is one deck wire netting 4 loam cake 3 front and back, audio signal sample end (namely being used for gathering the φ 32 sound heads of audio signal) 5 is equipped with in wire netting 4 inside, described audio signal sample 5 ends are fixed on the loam cake 3, be provided with the audio signal sample end, the circuit board 8 of audio signal input processing module and sound card, 10 are screwed on body 11, base 13 is fixing by screw and body 11, and be provided with the screw thread that can be connected with support 2 (can but be not limited to 5/8 screw thread) on the base 13, so that be fixed on the support.An inner φ who the arranges 32 sound heads 5 of wire netting 4 by cartridge seat 6, fixed head 7 and stator 9 fixing with loam cake 3 on.On corresponding knob 12 covers and the potentiometer, and fixing with loam cake 3 by stator 9.
On corresponding housing 1, can also be provided with the functional indicator light of a plurality of different colours, for example, indicator light to adopt one can send the light of three kinds of colors in the signal designation part among Fig. 1, plant a kind of function of color belt table, such as mute function, monitor function or sound-recording function etc., give user's bringing convenience property of use.
In the utility model, owing to adopted unique design at input, so that input signal more can be gone back original sound essence, increase product stability, adopt band to touch the potentiometer of beginning at control end, make whole product seem brief, understand that function is but very powerful in conjunction with the CM6400 sound card, thereby bring great convenience for user's use.And advantage simple in structure, easy accessibility that whole recording microphone also has.
The above; it only is the better embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (9)
1. a recording microphone is characterized in that, comprises audio signal sample end, audio signal input processing module, sound card and recording output interface; Wherein, described audio signal input processing module comprises linear operational amplifier, described audio signal sample end is connected with the audio signal input processing module, described audio signal input processing module carries out linearity to the audio signal that gathers and amplifies processing and be sent to described sound card, exports to sound pick-up outfit by the recording output interface that arranges on the described sound card again.
2. recording microphone according to claim 1 is characterized in that, described sound card adopts the USB sound card, and described USB sound card provides the USB interface that can be connected with the computer equipment as sound pick-up outfit.
3. recording microphone according to claim 2, it is characterized in that, adopting high pass filter that the audio signal that gathers is carried out high-pass filtering in the described audio signal input processing module processes, it is the operational amplifier of MAX4251 that described linear operational amplifier adopts model, the reference voltage that the reference power source of operational amplifier adopts described USB sound card to provide.
4. recording microphone according to claim 1, it is characterized in that, described sound card also is connected with audio frequency control end and audio output, described audio frequency control end comprises the potentiometer with touch-switch, wherein, whether touch-switch control sound card will gather audio signal is sent in the sound pick-up outfit, and the audio signal that potentiometer control gathers is exported to the power output of audio output.
5. recording microphone according to claim 1 is characterized in that, described sound card also is connected with the functional indicator light that can send multiple different colours.
6. each described recording microphone according to claim 1-5, it is characterized in that, this recording microphone also comprises support and housing, and described audio signal sample end, audio signal input processing module and sound card are arranged in the described housing, and described support also is installed on the housing.
7. recording microphone according to claim 6 is characterized in that, described potentiometer with touch-switch arranges in the described housing, and touch-switch is connected with knob on being arranged at housing.
8. recording microphone according to claim 6 is characterized in that, the described functional indicator light that can send multiple different colours is arranged on the housing.
9. recording microphone according to claim 6, it is characterized in that, described housing comprises loam cake, body and base, one deck wire netting is respectively arranged before and after the loam cake, the audio signal sample end is equipped with in wire netting inside, and described audio signal sample end is fixed in and covers, and the circuit board that is provided with audio signal sample end, audio signal input processing module and sound card is screwed on body, base is fixed by screw and body, and is provided with the screw thread that can be connected with support on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220342143 CN202679572U (en) | 2012-07-13 | 2012-07-13 | Recording microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220342143 CN202679572U (en) | 2012-07-13 | 2012-07-13 | Recording microphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679572U true CN202679572U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220342143 Expired - Fee Related CN202679572U (en) | 2012-07-13 | 2012-07-13 | Recording microphone |
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| Country | Link |
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| CN (1) | CN202679572U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070286A (en) * | 2015-07-28 | 2015-11-18 | 苏州宏展信息科技有限公司 | Voice feature extraction control device for recording pen |
| CN106254976A (en) * | 2016-08-24 | 2016-12-21 | 宁波市鄞州奥创电子有限公司 | Stereo USB capacitance sound head microphone |
-
2012
- 2012-07-13 CN CN 201220342143 patent/CN202679572U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070286A (en) * | 2015-07-28 | 2015-11-18 | 苏州宏展信息科技有限公司 | Voice feature extraction control device for recording pen |
| CN106254976A (en) * | 2016-08-24 | 2016-12-21 | 宁波市鄞州奥创电子有限公司 | Stereo USB capacitance sound head microphone |
| CN106254976B (en) * | 2016-08-24 | 2018-12-11 | 宁波奥创电子科技有限公司 | Stereo USB capacitance sound head microphone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20140713 |
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| EXPY | Termination of patent right or utility model |