CN206807689U - A kind of microphone distributor - Google Patents

Abstract

The utility model discloses a kind of microphone distributor, including signal input part, isolating transformer, signal output part and multiple isolation signals output ends；Signal input part is connected with one end of isolating transformer input winding, the other end of isolating transformer input winding is connected with signal output part；Each isolation signals output end is connected with isolating transformer output winding；The direct current signal that the isolating transformer is used to input a signal into end input is exported by signal output part and isolation signals output end respectively；Each isolation signals output end is equipped with corresponding PHANTOM POWER controller between inputting winding with isolating transformer；Each PHANTOM POWER controller is used to the direct current signal of corresponding isolation signals output end feeding back to signal input part by isolating transformer.The utility model realizes the audio request of an input multi output of microphone distributor.

Description

A kind of microphone distributor

Technical field

It the utility model is related to a kind of microphone, more particularly to a kind of microphone distributor.

Background technology

At present, the distribution of microphone sound intermediate frequency signal is to perplex the problem of engineers and technicians always with maintenance.General large-scale meeting View or performance etc. need multiple audio output signals to be used to supply the microphone of multiple sound consoles, auditorium, stage etc., but existing Some audio distribution devices are difficult to meet this requirement.Because the output of existing microphone distributor is single, can only realize man-to-man It is straight defeated, if wanting the microphone signal source for meeting above-mentioned multiple orientation, region, need to put into multiple microphone distributors, still, this Sample will result in cost height, circuit is random, the problems such as potential safety hazard be present, interference between synchronous signal also be present, causes audio to lose Very.

Utility model content

For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of microphone distributor, and it is solved The problem of output of microphone distributor is single in the prior art.

The purpose of this utility model adopts the following technical scheme that realization：

A kind of microphone distributor, including signal input part, isolating transformer, signal output part and multiple isolation signals are defeated Go out end；Signal input part is connected with one end of isolating transformer input winding, the other end and letter of isolating transformer input winding The connection of number output end；Each isolation signals output end is connected with isolating transformer output winding；The isolating transformer is used for The direct current signal for inputting a signal into end input is exported by signal output part, isolation signals output end respectively；Each isolation signals Output end is equipped with corresponding PHANTOM POWER controller between inputting winding with isolating transformer；

Each PHANTOM POWER controller is used to the direct current signal of corresponding isolation signals output end passing through isolating transformer Feed back to signal input part.

Further, in addition to voltage signal attenuator switch, one end and the signal of the voltage signal attenuator switch input End connection, the other end and isolating transformer input winding connection.

Further, each isolation signals output end is equipped with corresponding ground wire separation selecting switch.

Further, the isolation signals output end has two.

Compared with prior art, the beneficial effects of the utility model are：

The signal one that the utility model realizes microphone distributor inputs multi output, by configuration isolation transformer and unreal As power-supply controller of electric again so that isolation and amplifier is carried out between signal, avoids the interference between signal, can be carried for signal input part Power supply source.

Brief description of the drawings

Fig. 1 is the circuit diagram of microphone distributor provided by the utility model；

Fig. 2 is the operation principle circuit diagram of PHANTOM POWER controller provided by the utility model.

Embodiment

Below, with reference to accompanying drawing and embodiment, the utility model is described further, it is necessary to explanation is, On the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new Embodiment.

Embodiment

A kind of microphone distributor, as shown in figure 1, including signal input part, signal output part, the output of the first isolation signals End, the second isolation signals output end, isolating transformer T, the first PHANTOM POWER controller (the first PPD, Phantom Power ) and the second PHANTOM POWER controller (the 2nd PPD) Direct.

One end of isolating transformer input winding is connected with signal input part, for input audio signal；Isolating transformer The other end of input winding is connected with signal output part, and for exports audio signal, audio signal is direct current.First isolation letter Number output end, the second isolation signals output end are electrically connected with isolating transformer output winding respectively.Isolating transformer T is used for will The audio signal of signal input part input is respectively outputted to signal output part, the first isolation signals output end and the after treatment Two isolation signals output ends, it is achieved thereby that the function of an input multi output of microphone distributor.

In addition, the first isolation signals output end and input winding between be provided with the first PHANTOM POWER controller, second every The second PHANTOM POWER controller is provided between signal output part and isolating transformer input winding.

PHANTOM POWER controller is used to direct current being converted to high frequency just by oscillating circuit used by the utility model String alternating current, then direct current is adjusted to by high-frequency coupling circuit.In other words, PHANTOM POWER controller is used for isolation signals The direct current of output end first passes around oscillating circuit and is converted to high frequency sinusoidal alternating current, is then adjusted by high-frequency coupling circuit Into direct current, passing through isolating transformer T arriving signal inputs, so as to provide power supply for signal input part.

The working frequency of PHANTOM POWER controller is higher than more than 4 times of audio signal in the utility model, therefore, each PHANTOM POWER controller at work, will not cause any interference to audio signal.It is illustrated in figure 2 PHANTOM POWER controller Operation principle circuit diagram.Embodiment provided by the utility model is preferred embodiment, that is to say that the microphone distributor is The output of one input three, naturally it is also possible to be extended as needed.

In addition, the utility model also includes voltage signal attenuator switch DB, voltage signal attenuator switch DB one end and letter The connection of number input, the other end and isolating transformer input winding connection.Voltage signal attenuator switch DB is used to input a signal into The inputted audio signal in end is decayed in the voltage range of matching, so as to avoid the distortion of audio signal.

Preferably, the first isolation signals output end, the second isolation signals output end are respectively equipped with corresponding ground wire separation choosing Switch is selected, is as shown in Figure 1 K1 and K2.It can help to solve because caused by earth loop by setting ground wire to separate selecting switch Interference of the noise to the microphone distributor sound intermediate frequency signal.

Above-mentioned embodiment is only preferred embodiment of the present utility model, it is impossible to is protected with this to limit the utility model Scope, the change of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacing belongs to In the utility model scope claimed.

Claims (4)

1. A kind of 1. microphone distributor, it is characterised in that including：Signal input part, isolating transformer, signal output part and multiple Isolation signals output end；Signal input part is connected with one end of isolating transformer input winding, isolating transformer inputs winding The other end is connected with signal output part；Each isolation signals output end is connected with isolating transformer output winding；The isolation The direct current signal that transformer is used to input a signal into end input is exported by signal output part and isolation signals output end respectively； Each isolation signals output end is equipped with corresponding PHANTOM POWER controller between inputting winding with isolating transformer；

   Each PHANTOM POWER controller is used to feed back the direct current signal of corresponding isolation signals output end by isolating transformer To signal input part.
2. 2. microphone distributor as claimed in claim 1, it is characterised in that：Also include voltage signal attenuator switch, the voltage letter One end of number attenuator switch is connected with signal input part, the input winding connection of the other end and isolating transformer.
3. 3. microphone distributor as claimed in claim 1, it is characterised in that：Each isolation signals output end is equipped with corresponding ground wire Separate selecting switch.
4. 4. the microphone distributor as described in claim 1-3 any one, it is characterised in that：The isolation signals output end has two It is individual.