CN212137921U - Control device and loudspeaker equipment - Google Patents
Control device and loudspeaker equipment Download PDFInfo
- Publication number
- CN212137921U CN212137921U CN202021145555.2U CN202021145555U CN212137921U CN 212137921 U CN212137921 U CN 212137921U CN 202021145555 U CN202021145555 U CN 202021145555U CN 212137921 U CN212137921 U CN 212137921U
- Authority
- CN
- China
- Prior art keywords
- control circuit
- horn
- circuit
- control
- output end
- 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
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a controlgear and loudspeaker equipment. The control device comprises a first control circuit, a second control circuit, a third control circuit and a fourth control circuit; the first input end of the first control circuit is connected with the level output end of the first loudspeaker PTT key, and the first output end of the first control circuit is connected with the control end of the first loudspeaker audio power amplification circuit; the input end of the second control circuit is connected with the level output end of the first horn PTT key, and the first output end of the second control circuit is connected with the second input end of the first control circuit; the third control circuit has a structure similar to the first control circuit, and the fourth control circuit has a structure similar to the second control circuit. The utility model discloses can avoid taking place the passback phenomenon of whistling.
Description
Technical Field
The utility model belongs to the technical field of electronic equipment, more specifically relates to a controlgear and loudspeaker equipment.
Background
The radio station has two audio frequency mouths A, B, and under the condition that two audio frequency mouths need external loudspeaker to use simultaneously, the handle PTT key on the loudspeaker that connects on the audio frequency A mouth is pressed, when sending speech signal to the external world, this speech signal can be broadcast out after enlargiing in the loudspeaker that connects on the audio frequency B mouth, and the pronunciation of enlargiing can be passed back to in the mike of A mouth handle, causes the passback to howl.
SUMMERY OF THE UTILITY MODEL
To prior art's at least one defect or improvement demand, the utility model provides a be applied to controlgear and loudspeaker equipment of loudspeaker for when shelves loudspeaker equipment is in transmitting state, make two loudspeakers be in the silence state, avoid taking place the phenomenon of the passback of whistling.
To achieve the above object, according to a first aspect of the present invention, there is provided a control device for a speaker, the control device including a first control circuit, a second control circuit, a third control circuit and a fourth control circuit;
the first input end of the first control circuit is connected with the level output end of the first loudspeaker PTT key, and the first output end of the first control circuit is connected with the control end of the first loudspeaker audio power amplification circuit;
the input end of the second control circuit is connected with the level output end of the first horn PTT key, and the first output end of the second control circuit is connected with the second input end of the first control circuit;
the first input end of the third control circuit is connected with the level output end of the second loudspeaker PTT key, and the output end of the third control circuit is connected with the control end of the second loudspeaker audio power amplification circuit;
the input end of the fourth control circuit is connected with the level output end of the second horn PTT key, and the first output end of the fourth control circuit is connected with the second input end of the third control circuit;
and the second output end of the second control circuit is connected with the second output end of the fourth control circuit.
Preferably, the first control circuit comprises an NPN-type triode, a base of the NPN-type triode is connected with a level output end of the first horn PTT key, and is further connected with a first output end of the second control circuit, a collector of the NPN-type triode is grounded, and an emitter of the NPN-type triode is connected with a control end of the first horn audio power amplifier circuit.
Preferably, the second control circuit comprises a photoelectric coupler, a voltage-regulator tube and a PNP-type triode, the first end of the photoelectric coupler is connected with the level output end of the first horn PTT key, the second end and the third end of the photoelectric coupler are grounded, the fourth end of the photoelectric coupler is connected with the second output end of the fourth control circuit, the fourth end of the photoelectric coupler is further connected with the anode of the voltage-regulator tube, the cathode of the voltage-regulator tube is connected with the base of the PNP-type triode, the collector of the PNP-type triode is connected with the power supply, and the emitter of the PNP-type triode is connected with the second input end of the first control circuit.
Preferably, the third control circuit comprises an NPN-type triode, a base of the NPN-type triode is connected with a level output end of the second horn PTT key, and is further connected with a first output end of the fourth control circuit, a collector of the NPN-type triode is grounded, and an emitter of the NPN-type triode is connected with a control end of the second horn audio power amplifier circuit.
Preferably, the fourth control circuit comprises a photoelectric coupler, a voltage-regulator tube and a PNP type triode, the first end of the photoelectric coupler is connected with the level output end of the second horn PTT key, the second end and the third end of the photoelectric coupler are grounded, the fourth end of the photoelectric coupler is connected with the second output end of the second control circuit, the fourth end of the photoelectric coupler is further connected with the anode of the voltage-regulator tube, the cathode of the voltage-regulator tube is connected with the base of the PNP type triode, the collector of the PNP type triode is connected with the power supply, and the emitter of the PNP type triode is connected with the second input end of the third control circuit.
According to a second aspect of the present invention, there is provided a speaker apparatus comprising the control apparatus of any one of the above.
Generally, compared with the prior art, the utility model, beneficial effect has: when the horn device comprises the horn A and the horn B, a control device is designed. When a PTT key on the horn with the opening A is pressed, the horn with the opening A is in a sending state, the horn in the sending state can be automatically muted, and meanwhile, the horn with the opening B can be controlled to be also in a mute state. When a PTT key on the horn with the opening B is pressed down, the horn with the opening B is in a sending state, the horn in the sending state can be automatically muted, and meanwhile, the horn with the opening A can be controlled to be also in a mute state. Thus, the phenomenon of back howling can be avoided.
Drawings
Fig. 1 is a schematic diagram of a control device according to an embodiment of the present invention;
fig. 2 is a schematic view of a speaker device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the speaker device according to the embodiment of the present invention includes a power supply circuit, a radio station interface, an a speaker audio power amplifier circuit, an a speaker PTT key, an a speaker voice acquisition output circuit, a B speaker audio power amplifier circuit, a B speaker PTT key, a B speaker voice acquisition output circuit, and a control device. In the figure, the control devices on the left and right sides of the radio station interface refer to different parts of the same control device. The voice acquisition output circuit comprises three parts of voice filtering, output matching and voice input.
Wherein, the 1 st end of radio station interface is connected with A loudspeaker audio power amplifier circuit's input, and A loudspeaker audio power amplifier circuit's control end is connected with controlgear, and A loudspeaker audio power amplifier circuit's output is connected with A loudspeaker, and the 2 nd end of radio station interface is connected with controlgear, and the 3 rd end of radio station interface is connected with A loudspeaker voice acquisition output circuit's output.
The 4 th end of radio station interface is connected with B loudspeaker audio power amplifier circuit's input, and B loudspeaker audio power amplifier circuit's control end is connected with controlgear, and B loudspeaker audio power amplifier circuit's output is connected with B loudspeaker, and the 5 th end of radio station interface is connected with controlgear, and the 6 th end of radio station interface is connected with B loudspeaker voice acquisition output circuit's output.
The power circuit can be composed of a linear voltage stabilization chip, so that stable and reliable power supply for other hardware is ensured; the station interface is mainly used for introducing audio signals of the station and outputting voice. A loudspeaker, A loudspeaker audio power amplifier circuit have constituteed the public address circuit of A loudspeaker, and B loudspeaker, B loudspeaker audio power amplifier circuit have constituteed the public address circuit of B loudspeaker, carry out amplification processing with the radio station audio signal who receives. The voice filtering, output matching and voice input circuit form a voice acquisition output circuit for acquiring and outputting voice signals. When the PTT key of the A loudspeaker is pressed, the control equipment needs to (1) control the voice acquisition output circuit of the A loudspeaker to acquire a voice signal; (2) controlling the A horn amplifying circuit to mute; (3) and the radio station interface performs bidirectional transmission, on one hand, the radio station is controlled to send signals outwards, and on the other hand, the B-horn sound amplifying circuit is controlled to mute the signals.
As shown in fig. 2, an embodiment of the control device and a connection relationship between the control device and other modules are specifically described.
The control device includes a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit. The first control circuit and the second control circuit are shown in the figure, and the third control circuit and the fourth control circuit are not shown in the structure diagram. The third control circuit has a structure similar to that of the first control circuit, and the fourth control circuit has a structure similar to that of the second control circuit.
The first input end of the first control circuit is connected with the level output end of the PTT key of the A loudspeaker, and the first output end of the first control circuit is connected with the control end of the audio power amplification circuit of the A loudspeaker.
The input end of the second control circuit is connected with the level output end of the A horn PTT key, and the first output end of the second control circuit is connected with the second input end of the first control circuit.
The first input end of the third control circuit is connected with the level output end of the PTT key of the B loudspeaker, and the output end of the first control circuit is connected with the control end of the audio power amplifier circuit of the B loudspeaker.
The input end of the fourth control circuit is connected with the level output end of the PTT key of the horn B, and the first output end of the fourth control circuit is connected with the second input end of the third control circuit.
And the second output end of the second control circuit is connected with the second output end of the fourth control circuit. In particular, the two second outputs may be connected via terminals 2 and 4 of the station interface.
Preferably, the first control circuit comprises an NPN-type triode (Q4), a base of the NPN-type triode is connected with a level output end of the a-horn PTT key, i.e., is connected with a VCC-PTT signal, and is also connected with a first output end of the second control circuit, a collector of the NPN-type triode is grounded, and an emitter of the NPN-type triode is connected with a control end of the a-horn audio power amplifier circuit.
Preferably, the second control circuit comprises a photoelectric coupler (IC4), a voltage regulator tube (Z1) and a PNP type triode (Q8), the first end of the photoelectric coupler is connected with the level output end of the A horn PTT key, the second end and the third end of the photoelectric coupler are grounded, the fourth end of the photoelectric coupler is connected with the second output end of the fourth control circuit, and the fourth end of the photoelectric coupler of the second control circuit is connected with the fourth end of the photoelectric coupler of the second control circuit. The fourth end of the photoelectric coupler is also connected with the anode of the voltage-stabilizing tube, the cathode of the voltage-stabilizing tube is connected with the base electrode of the PNP type triode, the collector electrode of the PNP type triode is connected with a power supply (VCC), and the emitter electrode of the PNP type triode is connected with the second input end of the first control circuit.
Preferably, the third control circuit comprises an NPN-type triode, a base of the NPN-type triode is connected with the level output end of the PTT key of the B-horn, and is further connected with the first output end of the fourth control circuit, a collector of the NPN-type triode is grounded, and an emitter of the NPN-type triode is connected with the control end of the audio power amplifier circuit of the B-horn.
Preferably, the fourth control circuit comprises a photoelectric coupler, a voltage regulator tube and a PNP type triode, the first end of the photoelectric coupler is connected with the level output end of the B horn PTT key, the second end and the third end of the photoelectric coupler are grounded, the fourth end of the photoelectric coupler is connected with the second output end of the second control circuit, that is, the fourth end of the photoelectric coupler of the second control circuit is connected, the fourth end of the photoelectric coupler is further connected with the positive electrode of the voltage regulator tube, the negative electrode of the voltage regulator tube is connected with the base electrode of the PNP type triode, the collector electrode of the PNP type triode is connected with the power supply, and the emitter electrode of the PNP type triode is connected with the second input end of the third control circuit.
In addition, in the circuit, various resistors need to be provided according to the operating voltage of each device, and a detailed description thereof will not be given.
The operation of the control device is explained in detail below.
When the radio station is IN a receiving state, both PTT and VCC _ PTT have no signal, an SP _ IN audio signal IN the audio power amplifier circuit is output to SP _ OUT after being attenuated, and a loudspeaker normally plays the voice received by the radio station.
Suppose that the PTT key of a-horn is pressed, the radio station is in a transmitting state, and the VCC _ PTT signal output by the PTT key of a-horn is at a high level. On one hand, the SP _ IN audio signal is interrupted to the SP _ OUT by controlling the Q4 bit triode IN the first control circuit, so that the A-port horn is muted. On the other hand, IN the second control circuit, an optical coupler at the position of IC4 works to enable an output PTT signal to be at a low level, the low level signal is input to the fourth control circuit as input, and after passing through a voltage regulator tube of the fourth control circuit, a triode IN the fourth control circuit is controlled to be conducted, so that the triode of the third control circuit is controlled to be conducted, an SP _ IN audio signal of the B-horn audio power amplification circuit is interrupted to SP _ OUT, and the B-horn is muted. Similarly, assuming that the PTT key of B-horn is pressed, the muting of B-horn and the muting of a-horn are also controlled according to the same principle. This avoids the occurrence of back howling.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A control device is applied to a loudspeaker and is characterized by comprising a first control circuit, a second control circuit, a third control circuit and a fourth control circuit;
the first input end of the first control circuit is connected with the level output end of the first loudspeaker PTT key, and the first output end of the first control circuit is connected with the control end of the first loudspeaker audio power amplification circuit;
the input end of the second control circuit is connected with the level output end of the first horn PTT key, and the first output end of the second control circuit is connected with the second input end of the first control circuit;
the first input end of the third control circuit is connected with the level output end of the second loudspeaker PTT key, and the output end of the third control circuit is connected with the control end of the second loudspeaker audio power amplification circuit;
the input end of the fourth control circuit is connected with the level output end of the second horn PTT key, and the first output end of the fourth control circuit is connected with the second input end of the third control circuit;
and the second output end of the second control circuit is connected with the second output end of the fourth control circuit.
2. The control device as claimed in claim 1, wherein the first control circuit comprises an NPN transistor, a base of the NPN transistor is connected to the level output terminal of the first horn PTT key and is further connected to the first output terminal of the second control circuit, a collector of the NPN transistor is grounded, and an emitter of the NPN transistor is connected to the control terminal of the first horn audio power amplifier circuit.
3. The control device according to claim 1, wherein the second control circuit comprises a photoelectric coupler, a voltage regulator tube and a PNP triode, a first end of the photoelectric coupler is connected to the level output end of the first horn PTT key, a second end and a third end of the photoelectric coupler are grounded, a fourth end of the photoelectric coupler is connected to the second output end of the fourth control circuit, a fourth end of the photoelectric coupler is further connected to the positive electrode of the voltage regulator tube, the negative electrode of the voltage regulator tube is connected to the base electrode of the PNP triode, the collector electrode of the PNP triode is connected to the power supply, and the emitter electrode of the PNP triode is connected to the second input end of the first control circuit.
4. The control device as claimed in claim 1, wherein the third control circuit comprises an NPN transistor, a base of the NPN transistor is connected to the level output terminal of the second horn PTT key and also connected to the first output terminal of the fourth control circuit, a collector of the NPN transistor is grounded, and an emitter of the NPN transistor is connected to the control terminal of the second horn audio power amplifier circuit.
5. The control device according to claim 1, wherein the fourth control circuit comprises a photoelectric coupler, a voltage regulator tube and a PNP triode, a first end of the photoelectric coupler is connected to the level output end of the second horn PTT key, a second end and a third end of the photoelectric coupler are grounded, a fourth end of the photoelectric coupler is connected to the second output end of the second control circuit, a fourth end of the photoelectric coupler is further connected to the positive electrode of the voltage regulator tube, the negative electrode of the voltage regulator tube is connected to the base electrode of the PNP triode, the collector electrode of the PNP triode is connected to the power supply, and the emitter electrode of the PNP triode is connected to the second input end of the third control circuit.
6. A horn device characterized by comprising a control device according to any one of claims 1 to 5.
7. The horn device of claim 6, further comprising a radio interface, a first horn PTT key, a first horn audio power amplifier circuit, a first horn voice capture output circuit, a second horn PTT key, a second horn audio power amplifier circuit, and a second horn voice capture output circuit;
the first end of the radio interface is connected with the input end of a first loudspeaker audio power amplifier circuit, the control end of the first loudspeaker audio power amplifier circuit is connected with the control equipment, the output end of the first loudspeaker audio power amplifier circuit is connected with the first loudspeaker, the second end of the radio interface is connected with the control equipment, and the third end of the radio interface is connected with the output end of the first loudspeaker voice acquisition output circuit;
the fourth end of the radio interface is connected with the input end of a second horn audio power amplifier circuit, the control end of the second horn audio power amplifier circuit is connected with the control device, the output end of the second horn audio power amplifier circuit is connected with the second horn, the fifth end of the radio interface is connected with the control device, and the sixth end of the radio interface is connected with the output end of the second horn voice acquisition output circuit;
and the second output end of the second control circuit is connected with the second output end of the fourth control circuit through the second end and the fourth end of the radio station interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021145555.2U CN212137921U (en) | 2020-06-18 | 2020-06-18 | Control device and loudspeaker equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021145555.2U CN212137921U (en) | 2020-06-18 | 2020-06-18 | Control device and loudspeaker equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212137921U true CN212137921U (en) | 2020-12-11 |
Family
ID=73684593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021145555.2U Active CN212137921U (en) | 2020-06-18 | 2020-06-18 | Control device and loudspeaker equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212137921U (en) |
-
2020
- 2020-06-18 CN CN202021145555.2U patent/CN212137921U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101800920A (en) | Signal processing apparatus, signal processing method and program | |
| CN203537555U (en) | Audio device | |
| US6484040B1 (en) | Wireless mobile phone combining with car hi-fi speakers | |
| CN102238452A (en) | Method for actively resisting noises in hands-free earphone and hands-free earphone | |
| EP2533504A1 (en) | Audio apparatus capable of noise reduction and mobile telephone capable of noise reduction | |
| JP2004104806A (en) | Acoustic apparatus having multiple selection function, and sound signal control device | |
| CN212137921U (en) | Control device and loudspeaker equipment | |
| CN111294702B (en) | Audio control system and audio system | |
| CN214851794U (en) | System for automatically switching channels of three types of microphones | |
| CN205195931U (en) | Headset | |
| JP2007036908A (en) | Voice output device | |
| CN217363306U (en) | From taking speaker and external speaker control switching circuit | |
| CN207884866U (en) | A kind of Multifunctional audio converter | |
| CN112511954A (en) | Stereo assembly and terminal equipment | |
| CN111355854A (en) | Voice transmission device, system and use method thereof | |
| CN210042177U (en) | Voice broadcasting device | |
| JP2003125481A (en) | Voice reproducer | |
| JP2894882B2 (en) | Hands-free telephone equipment | |
| KR20200034166A (en) | Cables and methods that allow audio from a smartphone to be recorded on the same smartphone while listening to earphone | |
| CN213426490U (en) | Voice communication adapter | |
| CN212163692U (en) | Debugging-free digital sound device | |
| CN218679315U (en) | Microphone | |
| CN212628388U (en) | AI intelligence noise reduction module | |
| CN219893445U (en) | Signal amplitude limiting mute circuit and audio equipment | |
| CN221263878U (en) | Multifunctional interview live broadcast system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |