CN206728282U

CN206728282U - A kind of audio signal injection and finder

Info

Publication number: CN206728282U
Application number: CN201720652917.9U
Authority: CN
Inventors: 郑琪
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2017-06-02
Filing date: 2017-06-02
Publication date: 2017-12-08
Anticipated expiration: 2027-06-02

Abstract

The utility model discloses a kind of injection of audio signal and finder, including housing, it is arranged on hull outside and for injecting the probe of audio signal and for transmitting the earphone of voice signal, and is arranged on the audio signal injection of enclosure interior and track circuit and the supplying cell for each power unit power supply in audio signal injection and the circuit that tracks；The audio signal injection and the circuit that tracks include triode BG1, triode BG2 and triode BG3, function switch switch K, earphone socket CK, resistance R1, resistance R2, resistance R3 and resistance R4, and electric capacity C1, electric capacity C2 and electric capacity C3.The utility model is simple in construction, it is reasonable in design, use simple operation, cost of implementation is low, and functional reliability is high, complete function, it can be applied in installation, welding and the debugging of radio and the electronic technology practice of television set debugging, the culture of practical competence is carried out to student, it is practical, it is easy to promote the use of.

Description

A kind of audio signal injection and finder

Technical field

The utility model belongs to radio and television set debugging Instrument technology field, and in particular to a kind of audio signal injection And finder.

Background technology

In recent years, as requirement of the society to the innovation of talent ability of practice improves constantly, China university all strengthens practice The content of teaching, most effective of which link are teaching practices, and most of science and engineering universities and colleges have all opened up electronic technology practice, electricity Sub- technology practice is exactly that electronic component is identified, the operation of corresponding tool, the use of pertinent instruments, electronic equipment makes, dress The overall process of tune, culture and the engineering training of practical competence are carried out to student.Wherein, installation, welding and the tune of radio Examination, and television set debugging be electronic technology practice important content.Because the quantity needed for electronic technology practice is more, purchase Special commissioning device cost is higher, and the commercially available instrument dedicated for debugging radio and television set is also actually rare.It is existing Having also has the radio and television set debugging device of some signal sources, oscillograph and personal design in technology, still, its structure, Principle is all more complicated, and cost of implementation is low not enough, and use is convenient not enough, and some reliabilities are high not enough, and some functions are also It is relatively simple, use demand can't be met well.

Utility model content

Technical problem to be solved in the utility model is to be directed to above-mentioned deficiency of the prior art, there is provided a kind of audio Signal injects and finder, and its is simple in construction, reasonable in design, and using simple operation, cost of implementation is low, and functional reliability is high, work( Can be complete, it can be applied in installation, welding and the debugging of radio and the electronic technology practice of television set debugging, to student The culture of practical competence is carried out, it is practical, it is easy to promote the use of.

In order to solve the above technical problems, the technical solution adopted in the utility model is：A kind of audio signal is injected and tracked Device, it is characterised in that：Including housing, hull outside is arranged on and for injecting the probe of audio signal and for transmitting sound letter Number earphone, and be arranged on enclosure interior audio signal injection and track circuit and for audio signal injection and the circuit that tracks In the power supply of each power unit supplying cell；The audio signal injection and the circuit that tracks include triode BG1, triode BG2 With triode BG3, function switch switch K, earphone socket CK, resistance R1, resistance R2, resistance R3 and resistance R4, and electric capacity C1, Electric capacity C2 and electric capacity C3；One end of the electric capacity C1 is connected by the wire through housing with probe, the base of the triode BG1 Pole is connected with the electric capacity C1 other end and resistance R1 one end, the colelctor electrode of the triode BG1 and resistance R2 one end and electricity Hold C2 one end connection, the grounded emitter of the triode BG1, the base stage of the triode BG2 and the electric capacity C2 other end Connected with resistance R3 one end, the grounded emitter of the triode BG2, the base stage of the triode BG3 is with triode BG2's Colelctor electrode is connected with resistance R4 one end, and the emitter stage of the triode BG3 is connected with earphone socket CK negative pole, three pole Pipe BG3 grounded collector, the other end of the resistance R1, the resistance R2 other end, the resistance R3 other end, resistance R4 it is another Cathode output end of one end and earphone socket the CK positive pole with supplying cell is connected, and the cathode output end of the supplying cell connects Ground, one end of the function switch switch K are connected with triode BG1 base stage, and the other end of the function switch switch K passes through Electric capacity C3 is connected with triode BG3 base stage, and the function switch switch K and earphone socket CK is exposed at the outer surface of housing On.

A kind of above-mentioned audio signal injection and finder, it is characterised in that：The housing is rectangular shape.

A kind of above-mentioned audio signal injection and finder, it is characterised in that：The supplying cell is 1 No. 5 1.5V electricity of section Pond.

A kind of above-mentioned audio signal injection and finder, it is characterised in that：The function switch switch K is mini button Switch.

A kind of above-mentioned audio signal injection and finder, it is characterised in that：The triode BG1's and triode BG2 Model is 2N3904.

A kind of above-mentioned audio signal injection and finder, it is characterised in that：The model of the triode BG3 2N3906。

The utility model has advantages below compared with prior art：

1st, it is of the present utility model simple in construction, it is reasonable in design, it is easy to make.

2nd, small volume of the present utility model, it is easy to carry, use simple operation.

3rd, the utility model need not separately set power switch, doubled as, inserted an earphone into earphone socket CK by earphone socket CK, Supplying cell can be connected, pulls up earphone, you can disconnects supplying cell.

4th, the utility model has two kinds of functions of audio signal injector and finder, by press or break function switch K is switched, just can conveniently realize the switching of two kinds of functions of audio signal injector and finder.

5th, cost of implementation of the present utility model is low, and functional reliability is high, can be applied to installation, welding and the tune of radio In the practice of the electronic technology of examination and television set debugging, the culture of practical competence is carried out to student；It can also be used to video disc The maintenance of the voicefrequency circuit of the equipment such as machine, home theater.

6th, of the present utility model practical, using effect is good, is easy to promote the use of.

In summary, of the present utility model simple in construction, reasonable in design, using simple operation, cost of implementation is low, and work can High, the complete function by property, installation, welding and the debugging of radio and the electronic technology practice of television set debugging can be applied to In, the culture of practical competence is carried out to student, it is practical, it is easy to promote the use of.

Below by drawings and examples, the technical solution of the utility model is described in further detail.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the circuit theory diagrams of the injection of the utility model audio signal and the circuit that tracks.

Description of reference numerals:

1-housing；2-probe；3-earphone；

4-supplying cell；5-wire.

Embodiment

As depicted in figs. 1 and 2, audio signal injection of the present utility model and finder, including housing 1, are arranged on housing 1 It is outside and for injecting the probe 2 of audio signal and for transmitting the earphone 3 of voice signal, and be arranged on inside housing 1 Circuit and the supplying cell 4 for each power unit power supply in audio signal injection and the circuit that tracks are injected and tracked to audio signal； The audio signal injection and the circuit that tracks include triode BG1, triode BG2 and triode BG3, function switch switch K, ear The machine transplanting of rice seat CK, resistance R1, resistance R2, resistance R3 and resistance R4, and electric capacity C1, electric capacity C2 and electric capacity C3；The electric capacity C1's One end is connected by the wire 5 through housing 1 with probe 2, the base stage of the triode BG1 and electric capacity the C1 other end and resistance R1 one end connection, the colelctor electrode of the triode BG1 are connected with one end of resistance R2 one end and electric capacity C2, the triode BG1 grounded emitter, the base stage of the triode BG2 are connected with one end of the electric capacity C2 other end and resistance R3, and described three Pole pipe BG2 grounded emitter, the base stage of the triode BG3 are connected with one end of triode BG2 colelctor electrode and resistance R4, The emitter stage of the triode BG3 is connected with earphone socket CK negative pole, the grounded collector of the triode BG3, the electricity The positive pole for hindering the R1 other end, the resistance R2 other end, the resistance R3 other end, the resistance R4 other end and earphone socket CK is equal It is connected with the cathode output end of supplying cell 4, the cathode output end ground connection of the supplying cell 4, the function switch switch K's One end is connected with triode BG1 base stage, and the other end of the function switch switch K passes through electric capacity C3 and triode BG3 base Pole is connected, and the function switch switch K and earphone socket CK is exposed on the outer surface of housing 1.

In the present embodiment, as shown in figure 1, the housing 1 is rectangular shape.

In the present embodiment, the supplying cell 4 is 1 No. 5 1.5V batteries of section.

In the present embodiment, the function switch switch K is Minisize press button switch.

In the present embodiment, the model of the triode BG1 and triode BG2 are 2N3904.The type of the triode BG3 Number it is 2N3906.

In use, earphone 3 is inserted in earphone socket CK, supplying cell 4 just starts to note for audio signal the utility model Enter and the circuit that tracks in the power supply of each power unit, switch K is switched by operating function, just can realize audio signal injector with The switching of finder function.

When the utility model is used as into audio signal injector, function switch switch K is pressed, audio signal is injected and sought Mark circuit produces 800Hz or so fundamental signal and many higher hamonic wave signals, and signal is injected to debugged radio reception by probe 2 In machine or television set, while earphone 3 also sends audio sound signal.

When the utility model is used as into finder, function switch switch K is disconnected, radio or electricity are detected with probe 2 Depending on the output end of machine amplifying circuits at different levels, usually detected successively to preamplifying circuit from rear class amplifying circuit, and use screw Knife touches the input of corresponding radio amplifying circuits at different levels, and audio signal is added to triode BG1 by probe 2, electric capacity C1 Base stage, through triode BG1, triode BG2, resistance R1, resistance R2, resistance R3, resistance R4 and electric capacity C2 composition amplification electricity Lu Hou, impedance conversion is carried out by triode BG3, promotes earphone 3 to work；When this grade of amplifying circuit fault-free of detection, Voice signal can be just heard in earphone 3, when can't hear voice signal in earphone 3, just the level amplification of explanation detection is electric There is failure in road.

After the completion of use, earphone 3 is pulled up, you can it is respectively to be used in audio signal injection and the circuit that tracks to disconnect supplying cell 4 The power supply circuit of electric unit power supply.

It is described above, only it is preferred embodiment of the present utility model, not the utility model is imposed any restrictions, every Any simple modification, change and the equivalent structure change made according to the utility model technical spirit to above example, still Belong in the protection domain of technical solutions of the utility model.

Claims

1. a kind of audio signal injection and finder, it is characterised in that：Including housing (1), it is arranged on housing (1) outside and is used for Inject the probe (2) of audio signal and for transmitting the earphone (3) of voice signal, and be arranged on the internal audio of housing (1) Signal injects and tracked circuit and the supplying cell (4) for each power unit power supply in audio signal injection and the circuit that tracks；Institute Stating audio signal injection and the circuit that tracks includes triode BG1, triode BG2 and triode BG3, function switch switch K, earphone Socket CK, resistance R1, resistance R2, resistance R3 and resistance R4, and electric capacity C1, electric capacity C2 and electric capacity C3；The one of the electric capacity C1 End is connected by the wire (5) through housing (1) with probe (2), the base stage of the triode BG1 and the electric capacity C1 other end and Resistance R1 one end connection, the colelctor electrode of the triode BG1 are connected with one end of resistance R2 one end and electric capacity C2, and described three Pole pipe BG1 grounded emitter, the base stage of the triode BG2 are connected with one end of the electric capacity C2 other end and resistance R3, institute State triode BG2 grounded emitter, the base stage of the triode BG3 and triode BG2 colelctor electrode and resistance R4 one end Connection, the emitter stage of the triode BG3 are connected with earphone socket CK negative pole, the grounded collector of the triode BG3, institute State the resistance R1 other end, the resistance R2 other end, the resistance R3 other end, the resistance R4 other end and earphone socket CK just Cathode output end extremely with supplying cell (4) is connected, and the cathode output end ground connection of the supplying cell (4), the function is cut The one end for changing switch K is connected with triode BG1 base stage, and the other end of the function switch switch K passes through electric capacity C3 and three poles Pipe BG3 base stage connection, the function switch switch K and earphone socket CK are exposed on the outer surface of housing (1).

2. according to a kind of audio signal injection described in claim 1 and finder, it is characterised in that：The housing (1) is length Cube shape.

3. according to a kind of audio signal injection described in claim 1 and finder, it is characterised in that：The supplying cell (4) For 1 No. 5 1.5V batteries of section.

4. according to a kind of audio signal injection described in claim 1 and finder, it is characterised in that：The function switch switch K is Minisize press button switch.

5. according to a kind of audio signal injection described in claim 1 and finder, it is characterised in that：The triode BG1 and Triode BG2 model is 2N3904.

6. according to a kind of audio signal injection described in claim 1 and finder, it is characterised in that：The triode BG3's Model 2N3906.