CN205454081U - Audio frequency treatment circuit that interference killing feature is strong - Google Patents

Abstract

The utility model discloses an audio frequency treatment circuit that interference killing feature is strong, including electric capacity C1, diode VD1, triode VT1, resistance R1 and triode VT2, incoming signal vi and electric capacity C2 are connected respectively to electric capacity C1 one end, the electric capacity C1 other end is connecting resistance R1 respectively, resistance R2 and diode VD1 are anodal, the resistance R1 other end is connecting resistance R4 respectively, resistance R5, resistance R7, triode VT2 projecting pole and power VCC, diode VD1 negative pole is the connecting resistance R4 other end respectively, resistance R3, the resistance R5 other end, electric capacity C3 and resistance R6, the electric capacity C2 other end and diode VD2 negative pole are connected respectively to the resistance R3 other end, the anodal triode VT1 base of connecting of diode VD2. The utility model provides an audio frequency treatment circuit that interference killing feature is strong through add the one -level anti -jamming circuit before the amplitude treatment circuit, can effectively improve audio signal's quality, and circuit structure is simple, and is with low costs, and the interference killing feature is strong.

Description

The audio frequency processing circuit that a kind of capacity of resisting disturbance is strong

Technical field

This utility model relates to a kind of signal processing circuit, the audio frequency processing circuit that a kind of capacity of resisting disturbance is strong.

Background technology

Sound is to be produced by object vibration, and the just object at sounding calls source.Sound is the pressure wave motion by air.The little bone (auditory ossicles) of pressure wave vibration internal ear, these vibrations are converted into small electronics E.E.G, and it is exactly the sound that we aware.The principle that internal ear uses is as the pronunciation of microphones capture sound wave or speaker, and it is the relation between the mechanical part of movement and barometric wave.Natural, low at sound wave tone, mobile slow and sufficiently large time, we can essentially " sensation " vibrate health to barometric wave.

Along with the development of science and technology, as mobile phone, panel computer even some intelligent domestic systems, all with audio-frequence player device, and for the audio signal of input, it is required for after amplitude processes playing, the most various noises, the experience of extreme influence people.

Utility model content

The purpose of this utility model is the audio frequency processing circuit providing a kind of capacity of resisting disturbance strong, with the problem solving to propose in above-mentioned background technology.

For achieving the above object, the following technical scheme of this utility model offer:

nullThe audio frequency processing circuit that a kind of capacity of resisting disturbance is strong，Including electric capacity C1、Diode VD1、Audion VT1、Resistance R1 and audion VT2，Described electric capacity C1 one end connects input signal Vi and electric capacity C2 respectively，The electric capacity C1 other end connects resistance R1 respectively、Resistance R2 and diode VD1 positive pole，The resistance R1 other end connects resistance R4 respectively、Resistance R5、Resistance R7、Audion VT2 emitter stage and power supply VCC，Diode VD1 negative pole connects the resistance R4 other end respectively、Resistance R3、The resistance R5 other end、Electric capacity C3 and resistance R6，The resistance R3 other end connects the electric capacity C2 other end and diode VD2 negative pole respectively，Diode VD2 positive pole connecting triode VT1 base stage，Audion VT1 colelctor electrode connects the resistance R6 other end，The described electric capacity C3 other end connects the resistance R7 other end respectively、Resistance R8 and audion VT2 base stage，Audion VT2 colelctor electrode connects resistance R9 and electric capacity C4 respectively，The electric capacity C4 other end connects diode VD3 negative pole and output end vo respectively，Diode VD3 positive pole connects the resistance R9 other end respectively、The resistance R8 other end、Audion VT1 emitter stage and the resistance R2 other end.

As further program of the utility model: described power supply VCC voltage is 9V.

As this utility model further scheme: described diode VD3 is Zener diode.

Compared with prior art, the beneficial effects of the utility model are: this utility model provides the audio frequency processing circuit that a kind of capacity of resisting disturbance is strong, by adding one-level anti-jamming circuit before amplitude processes circuit, the quality of audio signal can be effectively improved, circuit structure is simple, and low cost, capacity of resisting disturbance is strong.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the audio frequency processing circuit that capacity of resisting disturbance is strong.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.

nullRefer to Fig. 1，In this utility model embodiment，The audio frequency processing circuit that a kind of capacity of resisting disturbance is strong，Including electric capacity C1、Diode VD1、Audion VT1、Resistance R1 and audion VT2，Described electric capacity C1 one end connects input signal Vi and electric capacity C2 respectively，The electric capacity C1 other end connects resistance R1 respectively、Resistance R2 and diode VD1 positive pole，The resistance R1 other end connects resistance R4 respectively、Resistance R5、Resistance R7、Audion VT2 emitter stage and power supply VCC，Diode VD1 negative pole connects the resistance R4 other end respectively、Resistance R3、The resistance R5 other end、Electric capacity C3 and resistance R6，The resistance R3 other end connects the electric capacity C2 other end and diode VD2 negative pole respectively，Diode VD2 positive pole connecting triode VT1 base stage，Audion VT1 colelctor electrode connects the resistance R6 other end，The described electric capacity C3 other end connects the resistance R7 other end respectively、Resistance R8 and audion VT2 base stage，Audion VT2 colelctor electrode connects resistance R9 and electric capacity C4 respectively，The electric capacity C4 other end connects diode VD3 negative pole and output end vo respectively，Diode VD3 positive pole connects the resistance R9 other end respectively、The resistance R8 other end、Audion VT1 emitter stage and the resistance R2 other end；Described power supply VCC voltage is 9V；Described diode VD3 is Zener diode.

Operation principle of the present utility model is: refer to Fig. 1, and when normally working, audion VT1 is in saturation conduction state, VD1 turns on, and input signal Vi is applied directly in the base stage of VT2 through C1, VD1, when when significantly disturbing pulse occurs of negative polarity, it is coupled to VT1 base stage by C2, VD2, making VT1 end, then the cathode voltage of VD1 is raised to higher than cathode voltage and ends, and makes disturbing pulse can not be added to the base stage of VT2, VT2 is made to end, after interference, VT1 recovers conducting, normally works；The amplitude split circuit that the composition such as VT2, R8, R9 and C3 is common, carries out amplitude process to input signal Vi.

It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and in the case of without departing substantially from spirit or essential attributes of the present utility model, it is possible to realize this utility model in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in this utility model.Should not be considered as limiting involved claim by any reference in claim.

In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.

Claims (3)

1. null1. the audio frequency processing circuit that a capacity of resisting disturbance is strong，Including electric capacity C1、Diode VD1、Audion VT1、Resistance R1 and audion VT2，It is characterized in that，Described electric capacity C1 one end connects input signal Vi and electric capacity C2 respectively，The electric capacity C1 other end connects resistance R1 respectively、Resistance R2 and diode VD1 positive pole，The resistance R1 other end connects resistance R4 respectively、Resistance R5、Resistance R7、Audion VT2 emitter stage and power supply VCC，Diode VD1 negative pole connects the resistance R4 other end respectively、Resistance R3、The resistance R5 other end、Electric capacity C3 and resistance R6，The resistance R3 other end connects the electric capacity C2 other end and diode VD2 negative pole respectively，Diode VD2 positive pole connecting triode VT1 base stage，Audion VT1 colelctor electrode connects the resistance R6 other end，The described electric capacity C3 other end connects the resistance R7 other end respectively、Resistance R8 and audion VT2 base stage，Audion VT2 colelctor electrode connects resistance R9 and electric capacity C4 respectively，The electric capacity C4 other end connects diode VD3 negative pole and output end vo respectively，Diode VD3 positive pole connects the resistance R9 other end respectively、The resistance R8 other end、Audion VT1 emitter stage and the resistance R2 other end.
2. The audio frequency processing circuit that capacity of resisting disturbance the most according to claim 1 is strong, it is characterised in that described power supply VCC voltage is 9V.
3. The audio frequency processing circuit that capacity of resisting disturbance the most according to claim 1 is strong, it is characterised in that described diode VD3 is Zener diode.