CN205320040U - Simple and easy audio power amplifier circuit - Google Patents
Simple and easy audio power amplifier circuit Download PDFInfo
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- CN205320040U CN205320040U CN201620024499.4U CN201620024499U CN205320040U CN 205320040 U CN205320040 U CN 205320040U CN 201620024499 U CN201620024499 U CN 201620024499U CN 205320040 U CN205320040 U CN 205320040U
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- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 230000005236 sound signal Effects 0.000 abstract description 6
- 230000001808 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 230000000149 penetrating Effects 0.000 description 3
- 230000001419 dependent Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000004223 radioprotective Effects 0.000 description 1
Abstract
The utility model relates to an audio circuit, especially a simple and easy audio power amplifier circuit, it includes that 12 volts of inputs, L channel input connector, R channel input connector, L channel output connect, R channel output connects, joint, nine resistance, electrolytic capacitor, three general electric capacity and two NPN type triodes are exported to the silence, audio signal enlargies through electric capacity (C150) coupling, the audio signal that the input is come in to rethread triode (Q2), then through electric capacity (C130) couplingout, has low cost, advantage that simple structure is practical.
Description
Technical field
This utility model relates to a kind of voicefrequency circuit, especially a kind of simple and easy audio amplifier circuit.
Background technology
The analogue audio frequency output tonequality of general Set Top Box does not have special power amplifying device good, and therefore Set Top Box output digit signals is only required in increasing application, and tonequality aspect is ensured by the equipment of rear class. SPDIF DAB exports, and mixes the power amplifying device of specialty, and tonequality aspect can be accomplished very good, and this is dependent on the audio frequency apparatus that rear class uses. There is shortcomings in existing SPDIF circuit, including:
1, signal amplitude is inadequate; 2, lack signal isolate and also serve as level conversion relevant treatment; 3, radiation exceeds standard. Additionally, in the prior art, the IO of increasing CPU belongs to the system power supply of 3.3V, power if the IO of CPU belongs to 5V, then without doing level shifting circuit, it should be noted that improve the driving force of circuit, because the IO driving force of general CPU is all more weak, it is prevented that output level is not high enough; Owing to digital signal directly exports from CPU end, again this signal is received another equipment, therefore, such interface to carry out enough protection, it is prevented that CPU is broken by electrostatic surging signal, it is therefore desirable to do signal isolation circuit, if system is 3.3V, also to also serve as level shifting circuit; Owing to the frequency ratio of SPDIF DAB circuit is higher, therefore often encounter the problem that radiation exceeds standard, it is impossible to by relevant authentication requirement, therefore it is noted that do the measure that radioprotective exceeds standard.
Improve in the industry, for instance Chinese patent discloses a kind of settop digital voicefrequency circuit, application number: 201220651605.3, the applying date: 2012-11-30, is connected to the I/O interface of processor, it is characterised in that: include penetrating with circuit and filter circuit; Described penetrating all includes input and outfan with circuit, filter circuit, described in penetrate with circuit input connect described I/O interface, penetrate with circuit outfan connect described filter circuit input, the external power amplifying device of outfan of filter circuit; Described penetrating includes audion, the second resistance and biasing resistor with circuit, one end of described second resistance is penetrate the input with circuit, the other end connects the base stage of described triode, the grounded collector of described audion, emitter stage connects one end of described biasing resistor, and another of described biasing resistor terminates a power supply;Described filter circuit includes flow-restriction, AC coupled unit and a high-frequency filter capacitor, described flow-restriction, AC coupled unit and High frequency filter unit all include input and outfan, the input of described flow-restriction connects the emitter stage of described audion, the outfan of flow-restriction connects the input of described AC coupled unit, the outfan of AC coupled unit connects one end of described high-frequency filter capacitor, the other end ground connection of described high-frequency filter capacitor; The external power amplifying device in common node place of described AC coupled unit and described high-frequency filter capacitor.
The deficiency of technique scheme is in that to be completely dependent on being controlled by the processor of I/O interface.
Summary of the invention
For the deficiencies in the prior art, this utility model provides audio amplifier circuit that is a kind of simple and easy and that do not controlled by processor.
The technical solution of the utility model is:
Simple and easy audio amplifier circuit, it is characterised in that: it includes 12 volts of inputs, L channel input adapter, R channel input adapter, L channel out splice going splice, R channel out splice going splice, quiet out splice going splice, nine resistance, an electrochemical capacitor, three general electric capacity and two NPN type triode;
Described 12 volts of inputs connect the second end of the first resistance, first end of described first resistance connects the positive pole of electrochemical capacitor respectively, first end of the second resistance and the first end of the 3rd resistance, the minus earth of described electrochemical capacitor, first end of the first general electric capacity that the second end of the second resistance connects respectively, first end of the 4th resistance and the B pole of the first NPN type triode, second end of the described first general electric capacity connects the first end of the second general electric capacity respectively, second end of the 5th resistance and the second end of the 6th resistance, first end of described 5th resistance connects L channel input adapter, first end of described 6th resistance connects R channel input adapter, second end of the described second general electric capacity connects the second end of the 4th resistance, the E pole of described first NPN type triode connects the first end of the 7th resistance, second end of described 7th resistance and the second end common ground of the 4th resistance, the C pole of described first NPN type triode connects the first end of the 8th resistance, second end of described 8th resistance connects the first end of the 3rd general electric capacity, second end of the described 3rd general electric capacity connects the C pole of the second NPN type triode respectively, L channel out splice going splice and R channel out splice going splice, the B pole of described second NPN type triode connects the first end of the 9th resistance, second end of described 9th resistance connects quiet out splice going splice, the E pole ground connection of described second NPN type triode.
Further, described electrochemical capacitor is 220 microfarads.
Further, the described first general electric capacity is 2.2 microfarads, and the second general electric capacity is 1200 pico farads, and the 3rd general electric capacity is 10 microfarads.
Further, described first resistance is 1000 ohm, second resistance is 100000 ohm, 3rd resistance is 910 ohm, and the 4th resistance is 30000 ohm, and the 5th resistance is 1000 ohm, 6th resistance is 1000 ohm, 7th resistance is 330 ohm, and the 8th resistance is 220 ohm, and the 9th resistance is 1000 ohm.
The beneficial effects of the utility model are: the audio signal that input is come in, through Capacitance Coupled, is amplified by audio signal again through audion, are then passed through Capacitance Coupled output, have with low cost, simple and practical advantage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
As shown in Figure 1, simple and easy audio amplifier circuit, it is characterised in that: it includes 12 volts of inputs (P+12V), L channel input adapter (STB-AL), R channel input adapter (STB-AR), L channel out splice going splice (AUDIO-OUT1), R channel out splice going splice (AUDIO-OUT2), quiet out splice going splice (AUDIO-MUTE), nine resistance, an electrochemical capacitor, three general electric capacity and two NPN type triode;
Described 12 volts of inputs (P+12V) connect the second end of the first resistance (R264), first end of described first resistance (R264) connects the positive pole of electrochemical capacitor (EC1) respectively, first end of the second resistance (R16) and the first end of the 3rd resistance (R15), the minus earth of described electrochemical capacitor (EC1), first end of the first general electric capacity (C150) that the second end of the second resistance (R16) connects respectively, first end of the 4th resistance (R12) and the B pole of the first NPN type triode (Q2), second end of the described first general electric capacity (C150) connects the first end of the second general electric capacity (C151) respectively, second end of the 5th resistance (R3) and the second end of the 6th resistance (R8), first end of described 5th resistance (R3) connects L channel input adapter (STB-AL), first end of described 6th resistance (R8) connects R channel input adapter (STB-AR), second end of the described second general electric capacity (C151) connects the second end of the 4th resistance (R12), the E pole of described first NPN type triode (Q2) connects the first end of the 7th resistance (R11), second end of described 7th resistance (R11) and the second end common ground of the 4th resistance (R12), the C pole of described first NPN type triode (Q2) connects the first end of the 8th resistance (R13), second end of described 8th resistance (R13) connects the first end of the 3rd general electric capacity (C130), second end of the described 3rd general electric capacity (C130) connects the C pole of the second NPN type triode (Q3) respectively, L channel out splice going splice (AUDIO-OUT1) and R channel out splice going splice (AUDIO-OUT2), the B pole of described second NPN type triode (Q3) connects the first end of the 9th resistance (R9), second end of described 9th resistance (R9) connects quiet out splice going splice (AUDIO-MUTE), the E pole ground connection of described second NPN type triode (Q3).
Further, described electrochemical capacitor (EC1) is 220 microfarads.
Further, the described first general electric capacity (C150) is 2.2 microfarads, and the second general electric capacity (C151) is 1200 pico farads, and the 3rd general electric capacity (C130) is 10 microfarads.
Further, described first resistance (R264) is 1000 ohm, second resistance (R16) is 100000 ohm, 3rd resistance (R15) is 910 ohm, and the 4th resistance (R12) is 30000 ohm, and the 5th resistance (R3) is 1000 ohm, 6th resistance (R8) is 1000 ohm, 7th resistance (R11) is 330 ohm, and the 8th resistance (R13) is 220 ohm, and the 9th resistance (R9) is 1000 ohm.
Operation principle is as follows: audio signal couples through electric capacity (C150), the audio signal that input is come in is amplified again through audion (Q2), is then passed through electric capacity (C130) coupling output.
Described in above-described embodiment and description is that principle of the present utility model and most preferred embodiment are described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model.
Claims (4)
1. simple and easy audio amplifier circuit, it is characterised in that: it includes 12 volts of inputs (P+12V), L channel input adapter (STB-AL), R channel input adapter (STB-AR), L channel out splice going splice (AUDIO-OUT1), R channel out splice going splice (AUDIO-OUT2), quiet out splice going splice (AUDIO-MUTE), nine resistance, an electrochemical capacitor, three general electric capacity and two NPN type triode;
Described 12 volts of inputs (P+12V) connect the second end of the first resistance (R264), first end of described first resistance (R264) connects the positive pole of electrochemical capacitor (EC1) respectively, first end of the second resistance (R16) and the first end of the 3rd resistance (R15), the minus earth of described electrochemical capacitor (EC1), first end of the first general electric capacity (C150) that the second end of the second resistance (R16) connects respectively, first end of the 4th resistance (R12) and the B pole of the first NPN type triode (Q2), second end of the described first general electric capacity (C150) connects the first end of the second general electric capacity (C151) respectively, second end of the 5th resistance (R3) and the second end of the 6th resistance (R8), first end of described 5th resistance (R3) connects L channel input adapter (STB-AL), first end of described 6th resistance (R8) connects R channel input adapter (STB-AR), second end of the described second general electric capacity (C151) connects the second end of the 4th resistance (R12), the E pole of described first NPN type triode (Q2) connects the first end of the 7th resistance (R11), second end of described 7th resistance (R11) and the second end common ground of the 4th resistance (R12), the C pole of described first NPN type triode (Q2) connects the first end of the 8th resistance (R13), second end of described 8th resistance (R13) connects the first end of the 3rd general electric capacity (C130), second end of the described 3rd general electric capacity (C130) connects the C pole of the second NPN type triode (Q3) respectively, L channel out splice going splice (AUDIO-OUT1) and R channel out splice going splice (AUDIO-OUT2), the B pole of described second NPN type triode (Q3) connects the first end of the 9th resistance (R9), second end of described 9th resistance (R9) connects quiet out splice going splice (AUDIO-MUTE), the E pole ground connection of described second NPN type triode (Q3).
2. simple and easy audio amplifier circuit according to claim 1, it is characterised in that: described electrochemical capacitor (EC1) is 220 microfarads.
3. simple and easy audio amplifier circuit according to claim 1, it is characterised in that: the described first general electric capacity (C150) is 2.2 microfarads, and the second general electric capacity (C151) is 1200 pico farads, and the 3rd general electric capacity (C130) is 10 microfarads.
4. simple and easy audio amplifier circuit according to claim 1, it is characterized in that: described first resistance (R264) is 1000 ohm, second resistance (R16) is 100000 ohm, 3rd resistance (R15) is 910 ohm, and the 4th resistance (R12) is 30000 ohm, and the 5th resistance (R3) is 1000 ohm, 6th resistance (R8) is 1000 ohm, 7th resistance (R11) is 330 ohm, and the 8th resistance (R13) is 220 ohm, and the 9th resistance (R9) is 1000 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620024499.4U CN205320040U (en) | 2016-01-12 | 2016-01-12 | Simple and easy audio power amplifier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620024499.4U CN205320040U (en) | 2016-01-12 | 2016-01-12 | Simple and easy audio power amplifier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205320040U true CN205320040U (en) | 2016-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620024499.4U Active CN205320040U (en) | 2016-01-12 | 2016-01-12 | Simple and easy audio power amplifier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205320040U (en) |
-
2016
- 2016-01-12 CN CN201620024499.4U patent/CN205320040U/en active Active
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| C14 | Grant of patent or utility model | ||
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