CN205430582U - Apply to earphone amplifier circuit of direct current earphone - Google Patents
Apply to earphone amplifier circuit of direct current earphone Download PDFInfo
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- CN205430582U CN205430582U CN201520763866.8U CN201520763866U CN205430582U CN 205430582 U CN205430582 U CN 205430582U CN 201520763866 U CN201520763866 U CN 201520763866U CN 205430582 U CN205430582 U CN 205430582U
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Abstract
The utility model belongs to the technical field of earphone accessory technique and specifically relates to an apply to earphone amplifier circuit of direct current earphone. It includes that first triode, second triode, third triode, fourth triode, the 5th triode, the 6th triode, a field effect transistor, the 2nd field effect transistor, the 3rd field effect transistor, a controlling resistor, the 2nd controlling resistor and earphone connect. The utility model discloses a plurality of field effect transistor and triode realize that audio signal enlargies, and the tone quality that will input audio signal extremely obtains effectual promotion, simultaneously, utilize a controlling resistor and the 2nd controlling resistor circuit gain control, its simple structure, convenient operation has very strong practicality.
Description
Technical field
This utility model relates to Headphone accessory technical field, a kind of headphone amplifier circuit applying to direct current earphone.
Background technology
Put it is well known that Earphone Amplifier is called for short ear.In earphone system, adding the link of an earphone power amplifier between source of sound and earphone, can improve the tone color trend of tonequality, adjustment system, this builds consensus in earphone fan.Particularly more than thousand yuan more high-grade earphones, after use Earphone Amplifier, tone quality improving is obvious audible.Although mostly there being headphone output socket on general source of sound (such as CD player), but the circuit of this jack behind and materials are the most mediocre.As a example by CD player, being typically all to do by the amplifiers such as a piece of 4556,4558 and amplify, the most several yuan of cost, how tonequality well imagines.Even the most senior CD player, its earphone amplifying circuit seldom has and reaches " fever " level.The CD player of some ten thousand yuan of level, but two panels JRC4558 has the most only been used in the amplification of its earphone, although promote most moving coil earphone enough, if but weigh by high standard, or inadequate, it is impossible to give full play of the real strength of high-grade earphone.Also have some middle-and-high-ranking sources of sound, such as Herba Kalimeridis scholar CD17 and above model, for ensureing tonequality, the most do not set earphone jack, Earphone Amplifier can only be coordinated to use.
Utility model content
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of headphone amplifier circuit applying to direct current earphone.
To achieve these goals, this utility model adopts the following technical scheme that
A kind of headphone amplifier circuit applying to direct current earphone, it includes the first audion, the second audion, the 3rd audion, the 4th audion, the 5th audion, the 6th audion, the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the first adjustable resistance, the second adjustable resistance and Earphone joint；
The source electrode of described first field effect transistor accesses power supply by the second resistance, the drain electrode of described first field effect transistor is connected with the adjustable end of the second adjustable resistance, the two of described second adjustable resistance fix the end source electrode respectively with the second field effect transistor and the 3rd field effect transistor and are connected, the described grid of the 3rd field effect transistor and the fixing end of the first adjustable resistance connect and pass through the first resistance access signal, the adjustable end of described first adjustable resistance is connected with Earphone joint, the drain electrode of described second field effect transistor is connected with the base stage of the 5th audion and passes through the 6th resistance access power supply, the drain electrode of described second field effect transistor is connected by the base stage of the 5th resistance being sequentially connected in series and the second electric capacity and the drain electrode of the 3rd field effect transistor and the 4th audion, the drain electrode of described 3rd field effect transistor accesses power supply by the 7th resistance；
The emitter stage of described 5th audion accesses power supply by the tenth resistance being sequentially connected in series and the 8th resistance, the described colelctor electrode of the 5th audion and the base stage of the 6th audion connect and pass through the 13rd resistance and be connected with Earphone joint, the emitter stage of described 6th audion is connected with Earphone joint by the 14th resistance, the described colelctor electrode of the 6th audion and the base stage of the 3rd audion connect and pass through the 11st resistance access power supply, the emitter stage of described 3rd audion accesses power supply by the 12nd resistance, and the colelctor electrode of described 3rd audion is connected with Earphone joint；
The emitter stage of described 4th audion accesses power supply by the 9th resistance being sequentially connected in series and the 8th resistance, the described colelctor electrode of the 4th audion and the base stage of the second audion connect and pass through the 3rd resistance access power supply, the colelctor electrode of described second audion and the base stage of the first audion connect and pass through the 15th resistance and be connected with Earphone joint, the emitter stage of described second audion accesses power supply by the 4th resistance, and the emitter stage of described first audion is connected with Earphone joint by the 16th resistance.
Owing to have employed such scheme, this utility model realizes audio signal by multiple field effect transistor and audion and amplifies, and the tonequality of input audio signal is extremely effectively promoted；Meanwhile, the first adjustable resistance and the second adjustable resistance is utilized to realize circuit gain control, its simple in construction, easy to operate, there is the strongest practicality.
Accompanying drawing explanation
Fig. 1 is the circuit structure principle schematic of this utility model embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that this utility model can be defined by the claims and cover is implemented.
As shown in Figure 1, a kind of headphone amplifier circuit applying to direct current earphone of the present embodiment, it includes the first audion Q1, the second audion Q2, the 3rd audion Q3, the 4th audion Q4, the 5th audion Q5, the 6th audion Q6, the first field effect transistor T1, the second field effect transistor T2, the 3rd field effect transistor T3, the first adjustable resistance RX1, the second adjustable resistance RX2 and Earphone joint U1；
nullThe source electrode of the first field effect transistor T1 accesses power supply by the second resistance R2，The drain electrode of the first field effect transistor T1 is connected with the adjustable end of the second adjustable resistance RX2，The two of second adjustable resistance RX2 fix the end source electrode respectively with the second field effect transistor T2 and the 3rd field effect transistor T3 and are connected，The grid of the 3rd field effect transistor T3 and the fixing end of the first adjustable resistance RX1 connect and pass through the first resistance R1 access signal，The adjustable end of the first adjustable resistance RX1 is connected with Earphone joint U1，The drain electrode of the second field effect transistor T2 is connected with the base stage of the 5th audion Q5 and passes through the 6th resistance R6 access power supply，The drain electrode of the second field effect transistor T2 is connected by the base stage of the 5th resistance R5 being sequentially connected in series and the second electric capacity C2 and the drain electrode of the 3rd field effect transistor T3 and the 4th audion Q4，The drain electrode of the 3rd field effect transistor T3 accesses power supply by the 7th resistance R7；
The emitter stage of the 5th audion Q5 accesses power supply by the tenth resistance R10 being sequentially connected in series and the 8th resistance R8, the colelctor electrode of the 5th audion Q5 and the base stage of the 6th audion Q6 connect and pass through the 13rd resistance R13 and Earphone joint U1 and be connected, the emitter stage of the 6th audion Q6 is connected with Earphone joint by the 14th resistance R14, the colelctor electrode of the 6th audion Q6 and the base stage of the 3rd audion Q3 connect and pass through the 11st resistance R11 access power supply, the emitter stage of the 3rd audion Q3 accesses power supply by the 12nd resistance R12, the colelctor electrode of the 3rd audion Q3 is connected with Earphone joint U1；
The emitter stage of the 4th audion Q4 accesses power supply by the 9th resistance R9 being sequentially connected in series and the 8th resistance R8, the colelctor electrode of the 4th audion Q4 and the base stage of the second audion Q2 connect and pass through the 3rd resistance R3 access power supply, the colelctor electrode of the second audion Q2 and the base stage of the first audion Q1 connect and pass through the 15th resistance R15 and be connected with Earphone joint U1, the emitter stage of the second audion Q2 accesses power supply by the 4th resistance R4, and the emitter stage of the first audion Q1 is connected with Earphone joint U1 by the 16th resistance R16.
The present embodiment realizes audio signal by multiple field effect transistor and audion and amplifies, and the tonequality of input audio signal is extremely effectively promoted；Meanwhile, utilize the first adjustable resistance RX1 and the second adjustable resistance RX2 to realize circuit gain control, thus preferably improve the normal processing and amplifying of audio signal, it is ensured that system worked well.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure utilizing this utility model description and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in scope of patent protection of the present utility model.
Claims (1)
1. the headphone amplifier circuit applying to direct current earphone, it is characterised in that: it includes the first audion, the second audion, the 3rd audion, the 4th audion, the 5th audion, the 6th audion, the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the first adjustable resistance, the second adjustable resistance and Earphone joint；
The source electrode of described first field effect transistor accesses power supply by the second resistance, the drain electrode of described first field effect transistor is connected with the adjustable end of the second adjustable resistance, the two of described second adjustable resistance fix the end source electrode respectively with the second field effect transistor and the 3rd field effect transistor and are connected, the described grid of the 3rd field effect transistor and the fixing end of the first adjustable resistance connect and pass through the first resistance access signal, the adjustable end of described first adjustable resistance is connected with Earphone joint, the drain electrode of described second field effect transistor is connected with the base stage of the 5th audion and passes through the 6th resistance access power supply, the drain electrode of described second field effect transistor is connected by the base stage of the 5th resistance being sequentially connected in series and the second electric capacity and the drain electrode of the 3rd field effect transistor and the 4th audion, the drain electrode of described 3rd field effect transistor accesses power supply by the 7th resistance；
The emitter stage of described 5th audion accesses power supply by the tenth resistance being sequentially connected in series and the 8th resistance, the described colelctor electrode of the 5th audion and the base stage of the 6th audion connect and pass through the 13rd resistance and be connected with Earphone joint, the emitter stage of described 6th audion is connected with Earphone joint by the 14th resistance, the described colelctor electrode of the 6th audion and the base stage of the 3rd audion connect and pass through the 11st resistance access power supply, the emitter stage of described 3rd audion accesses power supply by the 12nd resistance, and the colelctor electrode of described 3rd audion is connected with Earphone joint；
The emitter stage of described 4th audion accesses power supply by the 9th resistance being sequentially connected in series and the 8th resistance, the described colelctor electrode of the 4th audion and the base stage of the second audion connect and pass through the 3rd resistance access power supply, the colelctor electrode of described second audion and the base stage of the first audion connect and pass through the 15th resistance and be connected with Earphone joint, the emitter stage of described second audion accesses power supply by the 4th resistance, and the emitter stage of described first audion is connected with Earphone joint by the 16th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763866.8U CN205430582U (en) | 2015-09-29 | 2015-09-29 | Apply to earphone amplifier circuit of direct current earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520763866.8U CN205430582U (en) | 2015-09-29 | 2015-09-29 | Apply to earphone amplifier circuit of direct current earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205430582U true CN205430582U (en) | 2016-08-03 |
Family
ID=56517730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520763866.8U Expired - Fee Related CN205430582U (en) | 2015-09-29 | 2015-09-29 | Apply to earphone amplifier circuit of direct current earphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205430582U (en) |
-
2015
- 2015-09-29 CN CN201520763866.8U patent/CN205430582U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20170929 |