CN201303409Y

CN201303409Y - Non-polar microphone

Info

Publication number: CN201303409Y
Application number: CNU2008202099952U
Authority: CN
Inventors: 林义顺
Original assignee: UDID Tech Co Ltd
Current assignee: UDID Tech Co Ltd
Priority date: 2008-10-23
Filing date: 2008-10-23
Publication date: 2009-09-02
Anticipated expiration: 2018-10-23

Abstract

Disclosed is a non-polar microphone, which comprises a microphone circuit. The non-polar microphone is characterized in that the microphone circuit is connected with a polar conversion module and with the aid of the polar conversion module a positive power supply and a negative power supply inputted by a power supply terminal can be converted into correct positive and negative power supplies and transmitted to the microphone circuit for using. The utility model has the advantage that through the internal polar conversion module, the non-polar microphone is capable of converting the positive power supply and the negative power supply of the power supply terminal into a positive and a negative terminal connection points which are in accordance with the microphone circuit.

Description

Nonpolarity microphone

Technical field

The utility model relates to a kind of microphone, specifically, is a kind of nonpolarity microphone.

Background technology

In 1876, Alexander Graham Bell has invented the some of first microphone as phone, Thomas Edison has then invented first carbon microphone in 1886, under constantly improving, the microphone of widespread usage has Electret Condencer Microphone (Condenser Microphone) now, dynamic microphones (Dynamic Microphone) and micro electromechanical (MEMS) microphone, and described Electret Condencer Microphone is to lean on the change of two distances between partitions of electric capacity to produce change in voltage, when sound wave enters microphone, vibrating membrane produces vibration, because substrate is fixed, make vibrating membrane and substrate between distance can change along with vibration, according to the characteristic of electric capacity when two dividing plates distances change, capacitance C can produce change, (Q is an electric weight via Q=CV again, in Electret Condencer Microphone, can keep a definite value) as can be known, when C changes, will cause the change of voltage V.Because in Electret Condencer Microphone, need to keep fixing electric weight Q, so this type microphone needs extra power supply to operate, general common power supply is a battery, or powers by Phantom Power, higher because of Electret Condencer Microphone sensitivity, be usually used in high-quality recording;

And the basic structure of described dynamic microphones comprises coil, vibrating membrane, permanent magnet three partly, when sound wave enters microphone, vibrating membrane is subjected to the pressure of sound wave and produces vibration, the coil that links together with vibrating membrane then begins to move in magnetic field, according to Faraday's law and cold law, coil can produce induced current, described dynamic microphones is because contain coil and magnet, light unlike Electret Condencer Microphone, sensitivity is lower, and low-and high-frequency response performance is relatively poor, and its advantage is that price is more cheap, sound is comparatively soft and moist, is fit to be used for including voice;

Described in addition micro electromechanical microphone, promptly be to utilize integrated circuit technique that mechanical component and electronic building brick are designed on silicon wafer, with the development at present of micro electromechanical microphone, all be to utilize capacitance principle design, mainly contain two kinds of forms, first kind is electret formula microphone, another kind of form is a condensed microphone, has the better sound ratio of making an uproar with condensed microphone again in these two kinds of forms, higher sensitivity, lower temperature coefficient, and good characteristic such as advantages of higher stability, and its essential structure group mainly is to be separately fixed at electrode on the soft vibrating diaphragm and on the backboard of rigidity, there is a very little gap between vibrating diaphragm and backboard, be referred to as air gap, make it do free vibration completely with sound, and vibrating diaphragm and the backboard of vibration between the electric field change of formation promptly produce electronic signal on the circuit;

No matter be Electret Condencer Microphone (Condenser Microphone), dynamic microphones (Dynamic Microphone) or micro electromechanical (MEMS) microphone, all need connect feeder ear, can use microphone, but when being connected with power supply, the positive and negative end of necessary exactissima diligentia electrode is if the positive and negative end of misconnection power supply then can cause short circuit or assembly to burn, so when connecting, need pay special attention to the connection of electric power polarity.

Therefore known microphone structure exists above-mentioned all inconvenience and problem.

Summary of the invention

The purpose of this utility model is to propose a kind of nonpolarity microphone of the source that can arbitrarily microphone circuit be Connected Power.

For achieving the above object, technical solution of the present utility model is:

A kind of nonpolarity microphone comprises a microphone circuit, it is characterized in that:

Described microphone circuit links a polar switching module, by the positive and negative power supply that described polar switching module is imported feeder ear, is converted to correct positive and negative power supply and inputs in the microphone circuit and use.

Nonpolarity microphone of the present utility model can also be further achieved by the following technical measures.

Aforesaid nonpolarity microphone, wherein said polar switching module is made up of four unidirectional feed-through assemblies.

Aforesaid nonpolarity microphone, wherein said unidirectional feed-through assembly can be diode.

Aforesaid nonpolarity microphone, the anode of the first unidirectional feed-through assembly of wherein said four unidirectional feed-through assemblies is connected with cathode output end, and the negative terminal of the described first unidirectional feed-through assembly is connected with electrode input end; The negative terminal of the described second unidirectional feed-through assembly is connected with cathode output end, and the anode of the described second unidirectional feed-through assembly is connected with negative input; The negative terminal of described the 3rd unidirectional feed-through assembly is connected with cathode output end, and the anode of described the 3rd unidirectional feed-through assembly is connected with electrode input end; The anode of described the 4th unidirectional feed-through assembly is connected with cathode output end, and the negative terminal of described the 4th unidirectional feed-through assembly is connected with negative input.

After adopting technique scheme, nonpolarity microphone of the present utility model has the following advantages:

1. by inner polarity modular converter, the positive and negative electrode power source conversion of feeder ear can be become meet the positive and negative tip node of microphone circuit.

2. the positive and negative electrode power supply of convertible feeder ear is avoided the short circuit that the positive and negative polarity of user's misconnection feeder ear causes or is burnt.

3. can allow the user directly power supply is connected to described nonpolarity microphone, can save the time that the user distinguishes that positive and negative polarity spends.

Description of drawings

Fig. 1 is the calcspar of nonpolarity microphone of the present utility model;

Fig. 2 is that the polar switching module of nonpolarity microphone of the present utility model is implemented Organization Chart;

Fig. 3 A is the polar switching schematic diagram of the polar switching module of nonpolarity microphone of the present utility model;

Fig. 3 B is the polar switching schematic diagram of the polar switching module of nonpolarity microphone of the present utility model.

Among the figure:

1 nonpolarity microphone

11 microphone circuits

111 positive tip nodes

112 negative terminal contacts

12 polar switching modules

121 first diode assemblies

122 second diode assemblies

123 the 3rd diode assemblies

124 the 4th diode assemblies

125 electrode input ends

126 negative inputs

127 cathode output ends

128 cathode output ends

2 feeder ears

21 power positive ends

22 power supply negative terminals

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is illustrated further.

Now see also Fig. 1, Fig. 1 is the calcspar of nonpolarity microphone of the present utility model.As shown in the figure, described nonpolarity microphone 1 comprises:

One microphone circuit 11 is connected with the output of polar switching module 12;

One polar switching module 12, wherein said output 127,128 is connected with microphone circuit 11, and 125,126 of described inputs are connected with feeder ear 2;

The utility model is incorporated into described polar switching module 12 on the microphone circuit 11, makes it become a nonpolarity microphone 1; When feeder ear 2 connected described nonpolarity microphone 1, the power positive end 21 and the power supply negative terminal 22 of described feeder ear 2 all can carry out polar switching by polar switching module 12, made the electric power of its feeder ear 2 can correct being sent in the microphone circuit 11.

See also Fig. 2 again, Fig. 2 is that the polar switching module of nonpolarity microphone of the present utility model is implemented Organization Chart.As shown in the figure, described polar switching module 12, can be formed by four unidirectional feed-through assemblies (for example diode assembly), the anode of wherein said first diode assembly 121 is connected with cathode output end (VOUT (+)) 127, and the negative terminal of first diode assembly 121 is connected with electrode input end (VIN (+)) 125; The negative terminal of described second diode assembly 122 is connected with cathode output end (VOUT (-)) 128, and the anode of its second diode assembly 122 is connected with negative input (VIN (-)) 126; The negative terminal of described the 3rd diode assembly 123 is connected with cathode output end (VOUT (-)) 128, and the anode of the 3rd diode assembly 123 is connected with electrode input end (VIN (+)) 125; The anode of described the 4th diode assembly 124 is connected with cathode output end (VOUT (+)) 127, and the negative terminal of the 4th diode assembly 124 is connected with negative input (VIN (-)) 126.

See also Fig. 3 A and Fig. 3 B at last, Fig. 3 A and Fig. 3 B are the polar switching schematic diagram of the polar switching module of the nonpolarity microphone of the utility model.As shown in the figure, power positive end 21 and the first and the 3rd diode assembly 121 when described feeder ear 2,123 are connected, the power positive end 21 of described feeder ear 2 then is connected conducting via first diode assembly 121 with the positive tip node 111 of microphone circuit 11, the power supply negative terminal 22 of described in addition feeder ear 2 and the second and the 4th diode assembly 122,124 are connected, the power supply negative terminal 22 of described feeder ear 2 then is connected conducting via second diode assembly 122 with the negative terminal contact 112 of microphone circuit 11, described polar switching module 12 is sent to microphone circuit 11 with the electric power of feeder ear 2, makes its normal operation; If the power supply negative terminal 22 and the first and the 3rd diode assembly 121 of feeder ear 2,123 are connected, and power positive end 21 and the second and the 4th diode assembly 122,124 are connected, the first and the 3rd diode assembly 123 wherein, 124 can be switched on, and the electric power of feeder ear 2 is sent to the negative terminal contact 112 and the positive tip node 111 of microphone circuit 11, make its running.

Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique under the situation that does not break away from spirit and scope of the present utility model, can also be made various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.

Claims

1. a nonpolarity microphone comprises a microphone circuit, it is characterized in that:

2. nonpolarity microphone as claimed in claim 1 is characterized in that, described polar switching module is made up of four unidirectional feed-through assemblies.

3. nonpolarity microphone as claimed in claim 2 is characterized in that, described unidirectional feed-through assembly can be diode.

4. nonpolarity microphone as claimed in claim 2 is characterized in that, the anode of the first unidirectional feed-through assembly of described four unidirectional feed-through assemblies is connected with cathode output end, and the negative terminal of the described first unidirectional feed-through assembly is connected with electrode input end; The negative terminal of the described second unidirectional feed-through assembly is connected with cathode output end, and the anode of the described second unidirectional feed-through assembly is connected with negative input; The negative terminal of described the 3rd unidirectional feed-through assembly is connected with cathode output end, and the anode of described the 3rd unidirectional feed-through assembly is connected with electrode input end; The anode of described the 4th unidirectional feed-through assembly is connected with cathode output end, and the negative terminal of described the 4th unidirectional feed-through assembly is connected with negative input.