CN103079157B - Impedance transformation and signal amplifier of integrated vocal cavity and capacitance type microphone - Google Patents

Impedance transformation and signal amplifier of integrated vocal cavity and capacitance type microphone Download PDF

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Publication number
CN103079157B
CN103079157B CN201210589735.3A CN201210589735A CN103079157B CN 103079157 B CN103079157 B CN 103079157B CN 201210589735 A CN201210589735 A CN 201210589735A CN 103079157 B CN103079157 B CN 103079157B
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signal amplifier
impedance transformation
pole terminal
impedance
integrated
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CN103079157A (en
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谢小明
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BEIJING YANDONG MICROELECTRONIC Co Ltd
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BEIJING YANDONG MICROELECTRONIC Co Ltd
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Abstract

The invention relates to an impedance transformation and signal amplifier of an integrated vocal cavity and a capacitance type microphone. The impedance transformation and signal amplifier of the integrated vocal cavity comprises a plurality of G-pole terminals, at least one S-pole terminal and at least one D-pole terminal, wherein a sunk part or a cavity is formed in the upper part of the impedance transformation and signal amplifier; at least one of the G-pole terminals is positioned on the top of the impedance transformation and signal amplifier; and the at least one S-pole terminal is positioned on the side surface or the bottom of the impedance transformation and signal amplifier. A PCB (printed circuit board) and an electrode connecting ring are not used in the capacitance type microphone, so that assembling parts in the microphone are reduced, an assembling step is simplified, the production efficiency can be improved, and the manual cost can be reduced.

Description

The impedance transformation of the integrated operatic tunes and signal amplifier and Electret Condencer Microphone
Technical field
The present invention relates to Electret Condencer Microphone.Particularly, the present invention relates to the impedance transducer for Electret Condencer Microphone and the Electret Condencer Microphone comprising this impedance transducer.
Background technology
Electret Condencer Microphone is a kind of acoustical-electrical transducer, for acoustical signal is converted into dynamic voltage signal, change dynamic current signal again into subsequently, comprising the impedance transformation and the signal amplifier (being called impedance transducer for short hereinafter) that dynamic voltage signal are changed into dynamic current signal.Electret Condencer Microphone has now been widely used in numerous electronic products such as mobile phone, MP3, digital camera, PDA, recorder.
Fig. 1 shows a kind of typical Electret Condencer Microphone internal structure profile.This microphone has following design feature.
The operatic tunes: the area of space between pcb board and battery lead plate forms the operatic tunes of Electret Condencer Microphone.
Pcb board: install impedance transducer and other parts thereon, and by the metal line on it, impedance transducer is connected with screening can short circuit, also by the metal line on it, " G " pole of drawing from impedance transducer bottom is connected with the such as copper ring short circuit of Electrode connection ring.The flat shape of PCB is similar to the base profile of screening can.
Impedance transducer: as discrete parts by clamping or be bondingly fixed on pcb board, for realizing the function such as impedance transformation and signal amplification.
Screening can: other parts are accommodated therein, and play the shielding action of electromagnetic signal to external world.The base of screening can, through after in-flanges, is connected with connecting up for the surface metal being connected impedance transducer S pole on pcb board, and by impedance transducer S pole and corresponding battery lead plate electric connection.
Transducer " G " is son extremely: be communicated with by transitional wire with the battery lead plate above impedance transducer, or be communicated with corresponding battery lead plate to after Electrode connection ring such as copper ring short circuit by the wiring on pcb board.
Transducer " S " is son extremely: form short circuit by the wiring on pcb board and screening can and be connected.
Main plaing supports and the plastic hoop or mainly play of insulating effect supports and the Electrode connection ring of Electrode connection effect: be positioned on pcb board, plays its upper-part of support with the effect preventing screening can be out of shape or play effect electrode terminal being connected to battery lead plate.
Flange position: bottom screening can after flange, should ensure that flange position is connected " S " extreme son conductive connecting line with on pcb board forms short circuit and connects, and can ensure that again the parts such as PCB do not come off screening can.
Impedance transducer was fixed on pcb board before this by present mass-produced Electret Condencer Microphone in the course of processing, and then the pcb board with impedance transducer is arranged in screening can, as shown in Figure 1, meanwhile, between pcb board and battery lead plate, an operatic tunes as shown in Figure 1 is formed by metal or plastic stent support electrode plate.S pole (source electrode) terminal of impedance transducer is communicated with screening can by the wiring on pcb board.In production and assembly, pcb board and impedance transducer are two discrete parts, and number of assembling steps is complicated.
Along with the development of various electronic product, the manufacturer of electronic product and consumer are to the profile of electronic product components and parts, and size and price propose more and more high requirement.The existence of the structure of the Electret Condencer Microphone of prior art, particularly pcb board, limits the further miniaturization of Electret Condencer Microphone and the further reduction of cost.
Therefore, a kind of Electret Condencer Microphone of low cost of small size compact is needed.
Summary of the invention
The object of the present invention is to provide a kind of can the Electret Condencer Microphone that reduces of miniaturized further and cost.
According to an aspect of the present invention, a kind of impedance transformation and signal amplifier of the integrated operatic tunes is provided, comprises multiple G extremely sub, at least one S-pole terminal and at least one D-pole terminal, wherein
This impedance transformation and signal amplifier top are formed with depression or cavity,
At least one in the extreme son of described multiple G is positioned at the top of this impedance transformation and signal amplifier,
At least one S-pole terminal described is positioned at this impedance transformation and signal amplifier side surface or bottom.
Preferably, described depression is groove that is independent and/or that be communicated with.
Preferably, at least one S-pole terminal described at least another is positioned at bottom this impedance transformation and signal amplifier or side surface.
Preferably, the extreme son of described G flushes with the S-pole terminal being positioned at side surface with the plastic-sealed body outer surface of impedance transformation and signal amplifier or slightly protrudes from plastic-sealed body outer surface.
Preferably, the part being positioned at the S-pole terminal bottom impedance transformation and signal amplifier extends laterally to edge.
According to a further aspect in the invention, provide a kind of Electret Condencer Microphone, comprise impedance transformation and the signal amplifier of the integrated operatic tunes, two battery lead plates and screening can, wherein
It is extremely sub that this impedance transformation and signal amplifier comprise multiple G, at least one S-pole terminal and at least one D-pole terminal,
This impedance transformation and signal amplifier top are formed with depression or cavity,
At least one in the extreme son of described multiple G is positioned at this impedance transformation and signal amplifier top,
At least one S-pole terminal described is positioned at this impedance transformation and signal amplifier side surface or bottom,
One of battery lead plate to be positioned at above described impedance transformation and signal amplifier and with the extremely sub-electrical contact of G of described impedance transformation and signal amplifier;
Another battery lead plate is by the S-pole terminal electric connection of described screening can and impedance transformation and signal amplifier; And
Described impedance transformation and signal amplifier are by clamping, bonding, and at least one mode during point connects and crimps is fixed in described screening can.
Preferably, described depression is groove that is independent and/or that be communicated with.
Preferably, at least one S-pole terminal described at least another is positioned at bottom this impedance transformation and signal amplifier or side surface.
Preferably, the extreme son of described G flushes with the S-pole terminal being positioned at side surface with the plastic-sealed body outer surface of impedance transformation and signal amplifier or slightly protrudes from plastic-sealed body outer surface.
Preferably, the described impedance transformation of the integrated operatic tunes and the shape of signal amplifier and size are mated with the inwall of screening can, so that the impedance transformation of the described integrated operatic tunes and signal amplifier are by clamping, bonding, at least one mode during point connects and crimps is fixed in described screening can.
On the one hand, according to Electret Condencer Microphone of the present invention, G pole and the direct electrical contact of respective electrode plate can be realized by the top extreme for the part G of impedance transducer being formed in impedance transducer, by directly contacting and by screening can and corresponding battery lead plate electric connection of S-pole terminal being formed in transducer side or bottom can realize S pole and screening can, and pass through clamping, bonding, impedance transducer is fixed in the screening can of microphone by least one mode during point connects and crimps, the pcb board for providing wiring to connect and support in existing microphone can be saved, the volume of microphone is significantly reduced while reducing costs.On the other hand, in impedance transducer of the present invention, depression or cavity is formed on the top of impedance transducer, this depression or cavity can form the operatic tunes of microphone between impedance transducer and battery lead plate, the extreme son of G making battery lead plate directly be placed on transducer top upper and with the extreme son of G directly electrical contact become possibility.Like this, the operatic tunes built by the copper ring between pcb board and battery lead plate or plastic hoop in existing microphone can be saved further, not only reduce further cost, further reduce the volume of microphone simultaneously.
According to Electret Condencer Microphone of the present invention, owing to decreasing pcb board and copper ring, reduce the environmental pollution caused in pcb board manufacture process, while saving material, decrease environmental pollution.Meanwhile, due to the minimizing of build-up member in microphone, simplify installation step, the raising of production efficiency and the reduction of cost of labor can be realized.
Accompanying drawing explanation
Fig. 1 illustrates the profile of Electret Condencer Microphone internal structure in prior art;
Fig. 2 A-2D illustrates the appearance schematic diagram of the impedance transducer according to the embodiment of the present invention 1;
Fig. 3 A-3D illustrates the appearance schematic diagram of the impedance transducer according to the embodiment of the present invention 2;
Fig. 4 A-4D illustrates the appearance schematic diagram of the impedance transducer according to the embodiment of the present invention 3;
Fig. 5 illustrates the profile of the Electret Condencer Microphone internal structure of the impedance transducer comprising embodiment 1;
Fig. 6 illustrates the profile of the Electret Condencer Microphone internal structure of the impedance transducer comprising embodiment 2.
Embodiment
Below with reference to accompanying drawings and describe in detail in conjunction with the preferred embodiments according to the contour structures of impedance transducer of the present invention with according to Electret Condencer Microphone of the present invention.For ease of understanding, the feature in each figure draws not in scale
Fig. 2-4 illustrates the appearance schematic diagram of the impedance transducer of the integrated operatic tunes according to embodiment of the present invention 1-3 respectively.Fig. 2 A, 3A and 4A are the front views of each impedance transducer, Fig. 2 B, 3B and 4B are its end views, and Fig. 2 C, 3C and 4C are its vertical views, and Fig. 2 D, 3D and 4D are its upward views.Specifically describe the contour structures of the impedance transducer according to various embodiments of the present invention below with reference to accompanying drawings.
External shape and size: impedance transducer of the present invention can have different shapes, such as bottom can be circular, oval, square or rectangle etc.Particularly, the shape and size of impedance transducer should meet the shape and size requirement of the Electret Condencer Microphone that it is applied.This hereafter will describe in detail.
Depression or cavity: there is depression for the formation of the operatic tunes of Electret Condencer Microphone or cavity according to the top of impedance transducer of the present invention.
Be formed in the top that depression in impedance transducer or cavity are preferably placed at impedance transducer, such as, be groove that is independent and/or that be communicated with, and various shape and size can be had as required.The impedance transducer of embodiment 1 single strip groove for top is formed, is shown in Fig. 2.Embodiment 2 has the impedance transducer of two strip grooves for top is formed, see Fig. 3.Embodiment 3 has the impedance transducer of a circular groove for top, sees Fig. 4.
Impedance transducer of the present invention has three and above electrode leading-out terminal at least or claims electrode terminal, the electrode that wherein S1, S2 etc. mark with alphabetical S is connected at impedance transducer internal mutual, form S-pole terminal on surface, form the S pole of transducer thus, S pole can be referred to as.The electrode marked with alphabetical D is called D pole.The electrode that G1, G2 etc. mark with alphabetical G interconnects in converter inside, forms G extremely sub, form the G pole of transducer thus on surface.
As shown in the FIG., the extreme son of G can be formed in the top of impedance transducer, preferably concordant with top plastic-sealed body or slightly protrude from top plastic-sealed body.Above the extreme son of G that this structure makes to be placed on by battery lead plate impedance transducer in Electret Condencer Microphone with the extreme son of G directly electrical contact become possibility.The electrode terminal of each electrode such as S pole and the D pole of bottom protrudes from bottom plastic-sealed body.Preferably, bottom S1 terminal can extend to plastic-sealed body lateral edges, with guarantee with screening can bottom flange position electric connection.Electrode terminal such as S2 with the S3 terminal of each electrode in transducer side is concordant or slightly protrude from transducer side face plastic-sealed body, so as likely with the screening can electrical contact of Electret Condencer Microphone.
The assembling mode of the screening can according to impedance transducer of the present invention and Electret Condencer Microphone is illustrated below with reference to Fig. 5 and Fig. 6.
Fig. 5 illustrates the profile of the Electret Condencer Microphone internal structure according to the embodiment of the present invention 1.As can be seen from the figure, the external shape of impedance transducer is similar to the interior shape of screening can, and its external dimensions is equal to or slightly less than the inside dimension of screening can.In other words, the external shape of impedance transducer and size are mated with the shape and size of the inside of screening can, so that this impedance transducer can pass through clamping, bonding, and at least one mode during point connects and crimps is fixed in screening can.The longitudinal direction height of impedance transducer should design according to the height of the internal diameter height of the screening can of Electret Condencer Microphone and other parts.
Particularly, the S-pole terminal of this impedance transducer can be positioned at bottom surface or the side of transducer, also can be positioned at bottom surface and side simultaneously.The S1 terminal of bottom surface protrudes from the plastic encapsulation surface bottom impedance transducer, and S1 terminal can extend laterally to edge.Impedance transducer by the flange crimping of its bottom plastic Feng Tiyu microphone screening can or can be adhesively fixed.Now, extend laterally to S1 terminal compression joint direct electrical contact with screening can on the flange of screening can at edge, and achieve the electric connection with respective electrode plate 1 by this screening can.Further, be positioned at the S2 terminal of impedance transducer side and S3 terminal and can achieve the electric connection with respective electrode plate 1 with screening can electrical contact by this screening can.By this set, S-pole terminal when without any need for external connecting leads and pcb board, can realize the electric connection with respective electrode plate 1 by screening can.The extreme son of at least part of G of impedance transducer is positioned at the top of transducer, flushes in or slightly protrude from transducer top plastic envelope surface.Battery lead plate 2 is positioned at the top of impedance transducer and directly contacts with the extreme son of G.Now, the operatic tunes of Electret Condencer Microphone is provided by the depression be formed on impedance transducer.By extreme for G being arranged at the top of impedance transducer, can when not needing provide the pcb board of electrical connection and communication conductive wire for the extreme son of G and battery lead plate 2 and provide the copper ring of electric connection and support for pcb board and battery lead plate in prior art, realize the electric connection of G pole by impedance transducer and battery lead plate 2.
Impedance transducer is by crimping, clamping, point connect with bonding at least one mode himself to be fixed in screening can and can the battery lead plate 2 be placed on above impedance transducer and miscellaneous part to be provided a supporting role, prevent the distortion of screening can, instead of the pcb board shown in Fig. 1 from structure.
Can find out, in Electret Condencer Microphone shown in Fig. 5, impedance transducer according to the embodiment of the present invention 1 had both had impedance transformation and signal amplifying function, again can the pcb board shown in alternate figures 1 and the copper ring between pcb board and battery lead plate 1 or plastic hoop, bear the effect that pcb board supports the miscellaneous parts such as screening can, ring support, battery lead plate, while simplified structure, effectively reduce the volume of Electret Condencer Microphone.
Fig. 6 illustrates the profile of the Electret Condencer Microphone internal structure of the impedance transducer be equipped with according to the embodiment of the present invention 2.Different from example shown in Fig. 5, the impedance transducer with two strip grooves provides 2 operatic tunes in microphone, for providing the acoustical cavity being different from example shown in Fig. 5 in microphone.Those skilled in the art can select the impedance transducer with respective recesses structure to meet the designing requirement of microphone as required.For simplicity's sake, identical with Fig. 5 architectural feature repeats no more here.
Obtain feature according to impedance transducer of the present invention and Electret Condencer Microphone to be:
1. form the depression that shape is groove or scrobicular ring at the top of impedance transducer, when being applied in microphone, this depression can be positioned at the operatic tunes forming microphone together with the battery lead plate above transducer, therefore the invention provides a kind of impedance transducer being integrated with the operatic tunes.
2. be complete with the screening can of Electret Condencer Microphone to be assembled or substantially identical by the top of impedance transducer and the profile design of bottom outer edge, and outside dimension is designed to the inner wall size equaling or be slightly smaller than screening can, be convenient between screening can with impedance transducer by clamping, bonding, at least one mode during point connects and crimps realizes fixing, and guarantees that impedance transducer does not come off from screening can.
3. when impedance transducer of the present invention is assemblied in Electret Condencer Microphone, when without the need to other transitional conductive connecting, impedance transducer S pole and screening can electric connection and with respective electrode plate electric connection.When without the need to other transitional conductive connecting, the G pole being formed in impedance transducer top and the direct electric connection of respective electrode plate be placed on it.
Can find out, impedance transducer of the present invention is integrated with the function of the pcb board shown in Fig. 1, copper ring and the operatic tunes.Adopt and eliminate pcb board of the prior art and copper ring according to the Electret Condencer Microphone of impedance transducer of the present invention, achieve material-saving to reduce discharging, environmental protection, simultaneously owing to decreasing build-up member, reduce material cost and cost of labor, and significantly improve production efficiency.
Above by preferred embodiment to invention has been detailed description, but the present invention is not limited thereto.Those skilled in the art of the present technique can carry out various amendment according to principle of the present invention.Therefore, all amendments done according to the principle of the invention, all should be understood to fall into protection scope of the present invention.

Claims (10)

1. the impedance transformation of the integrated operatic tunes and a signal amplifier, comprise multiple G extremely sub, and at least one S-pole terminal and at least one D-pole terminal, is characterized in that,
This impedance transformation and signal amplifier top are formed with depression or cavity,
At least one in the extreme son of described multiple G is positioned at the top of this impedance transformation and signal amplifier,
At least one S-pole terminal described is positioned at this impedance transformation and signal amplifier side surface or bottom.
2. the impedance transformation of the integrated operatic tunes as claimed in claim 1 and signal amplifier, is characterized in that, described depression is groove that is independent and/or that be communicated with.
3. the impedance transformation of the integrated operatic tunes as claimed in claim 1 and signal amplifier, it is characterized in that, this impedance transformation and signal amplifier comprise at least one further and are positioned at bottom this impedance transformation and signal amplifier or the S-pole terminal of side surface.
4. the impedance transformation of the integrated operatic tunes as claimed in claim 1 and signal amplifier, is characterized in that, the extreme son of described G and the S-pole terminal being positioned at side surface flush with the plastic-sealed body outer surface of impedance transformation and signal amplifier or slightly protrude from plastic-sealed body outer surface.
5. the impedance transformation of the integrated operatic tunes as claimed in claim 1 and signal amplifier, it is characterized in that, the part being positioned at the S-pole terminal bottom impedance transformation and signal amplifier extends laterally to edge.
6. an Electret Condencer Microphone, comprises impedance transformation and the signal amplifier of the integrated operatic tunes, and two battery lead plates and screening can, is characterized in that,
It is extremely sub that this impedance transformation and signal amplifier comprise multiple G, at least one S-pole terminal and at least one D-pole terminal,
This impedance transformation and signal amplifier top are formed with depression or cavity,
At least one in the extreme son of described multiple G is positioned at this impedance transformation and signal amplifier top,
At least one S-pole terminal described is positioned at this impedance transformation and signal amplifier side surface or bottom,
One of battery lead plate to be positioned at above described impedance transformation and signal amplifier and with the extremely sub-electrical contact of G of described impedance transformation and signal amplifier;
Another battery lead plate is by the S-pole terminal electric connection of described screening can and impedance transformation and signal amplifier; And
Described impedance transformation and signal amplifier are by clamping, bonding, and at least one mode during point connects and crimps is fixed in described screening can.
7. Electret Condencer Microphone as claimed in claim 6, is characterized in that, described depression is groove that is independent and/or that be communicated with.
8. Electret Condencer Microphone as claimed in claim 6, it is characterized in that, this impedance transformation and signal amplifier comprise at least one further and are positioned at bottom this impedance transformation and signal amplifier or the S-pole terminal of side surface.
9. Electret Condencer Microphone as claimed in claim 6, is characterized in that, the extreme son of described G flushes with the S-pole terminal being positioned at side surface with the plastic-sealed body outer surface of impedance transformation and signal amplifier or slightly protrudes from plastic-sealed body outer surface.
10. Electret Condencer Microphone as claimed in claim 6, it is characterized in that, the described impedance transformation of the integrated operatic tunes and the shape of signal amplifier and size are mated with the inwall of screening can, so that the impedance transformation of the described integrated operatic tunes and signal amplifier pass through clamping, bonding, at least one mode during point connects and crimps is fixed in described screening can.
CN201210589735.3A 2012-12-28 2012-12-28 Impedance transformation and signal amplifier of integrated vocal cavity and capacitance type microphone Active CN103079157B (en)

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Citations (8)

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US5097515A (en) * 1988-11-30 1992-03-17 Matsushita Electric Industrial Co., Ltd. Electret condenser microphone
CN2715447Y (en) * 2003-10-14 2005-08-03 深圳市豪恩电声科技有限公司 Front back electret type capacitor microphone
CN201066929Y (en) * 2007-06-14 2008-05-28 宁波鑫丰泰电器有限公司 Capacitance microphone capable of filtering EMI noise
CN101674507A (en) * 2009-09-25 2010-03-17 潍坊安晶电子有限公司 Electroacoustic component
CN101752424A (en) * 2008-12-17 2010-06-23 财团法人工业技术研究院 Thin film transistor
CN201533388U (en) * 2009-09-25 2010-07-21 潍坊安晶电子有限公司 Electroacoustic element
CN102111704A (en) * 2009-12-24 2011-06-29 谢小明 Novel structured capacitance type microphone by virtue of utilizing semiconductor impedance conversion and signal amplifier body to replace printed circuit board (PCB)
CN203327233U (en) * 2012-12-28 2013-12-04 北京燕东微电子有限公司 Tune-integrated impedance converting and signal amplifying device and capacitance type microphone

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Publication number Priority date Publication date Assignee Title
US7893474B2 (en) * 2006-02-14 2011-02-22 University Of Florida Research Foundation, Inc. Method and apparatus for imaging utilizing an ultrasonic imaging sensor array
CN201479363U (en) * 2009-07-01 2010-05-19 美律实业股份有限公司 Capacitor type microphone

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097515A (en) * 1988-11-30 1992-03-17 Matsushita Electric Industrial Co., Ltd. Electret condenser microphone
CN2715447Y (en) * 2003-10-14 2005-08-03 深圳市豪恩电声科技有限公司 Front back electret type capacitor microphone
CN201066929Y (en) * 2007-06-14 2008-05-28 宁波鑫丰泰电器有限公司 Capacitance microphone capable of filtering EMI noise
CN101752424A (en) * 2008-12-17 2010-06-23 财团法人工业技术研究院 Thin film transistor
CN101674507A (en) * 2009-09-25 2010-03-17 潍坊安晶电子有限公司 Electroacoustic component
CN201533388U (en) * 2009-09-25 2010-07-21 潍坊安晶电子有限公司 Electroacoustic element
CN102111704A (en) * 2009-12-24 2011-06-29 谢小明 Novel structured capacitance type microphone by virtue of utilizing semiconductor impedance conversion and signal amplifier body to replace printed circuit board (PCB)
CN203327233U (en) * 2012-12-28 2013-12-04 北京燕东微电子有限公司 Tune-integrated impedance converting and signal amplifying device and capacitance type microphone

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