CN220798529U - System for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification - Google Patents
System for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification Download PDFInfo
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- CN220798529U CN220798529U CN202322566844.XU CN202322566844U CN220798529U CN 220798529 U CN220798529 U CN 220798529U CN 202322566844 U CN202322566844 U CN 202322566844U CN 220798529 U CN220798529 U CN 220798529U
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Abstract
The utility model provides a system for realizing 2.1 and 2.2 channel power amplification based on a digital audio power amplifier, which comprises a TV SOC system, a first digital power amplifier and a second digital power amplifier, wherein the TV SOC system is respectively connected with a first digital power amplifier input end and a second digital power amplifier input end, a first digital power amplifier output end is respectively connected with a left channel loudspeaker and a right channel loudspeaker, a second digital power amplifier output end is connected with a woofer, the first digital power amplifier is used for processing medium-high audio sound signals, the second digital power amplifier is used for processing low-frequency sound signals, the first digital power amplifier output end outputs the processed medium-high audio signals to drive the left channel loudspeaker and the right channel loudspeaker to sound, and the second digital power amplifier output end outputs the processed low-frequency sound signals to drive the woofer to sound. The beneficial effects of the utility model are as follows: the system for realizing 2.1 and 2.2 channel power amplification based on the digital audio power amplification has an independent low-frequency unit and has good bass effect.
Description
Technical Field
The utility model relates to the technical field of audio processing, in particular to a system for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification.
Background
The traditional 2.0 sound channel is a stereo system which is formed by transmitting a single group of I2S signals to a single audio power amplification system and adding two full-frequency-band speakers, and no independent low-frequency unit exists.
Disadvantages of the prior art:
the traditional 2.0 sound channel is formed by transmitting a single group of I2S signals to a digital power amplifier IC and two independent left and right sound channel full-frequency loudspeakers, and the support of the heavy bass loudspeaker is lacked, so that the heavy bass effect is poor.
Disclosure of Invention
In order to solve the problem of poor 2.0-channel heavy bass effect in the prior art, the utility model provides a system for realizing 2.1 and 2.2-channel power amplification based on a digital audio power amplifier.
The utility model provides a system for realizing 2.1 and 2.2 channel power amplification based on a digital audio power amplifier, which comprises a TV SOC system, a first digital power amplifier and a second digital power amplifier, wherein the TV SOC system is respectively connected with an input end of the first digital power amplifier and an input end of the second digital power amplifier, an output end of the first digital power amplifier is respectively connected with a left channel loudspeaker and a right channel loudspeaker, an output end of the second digital power amplifier is connected with a woofer, the first digital power amplifier is used for processing middle and high audio sound signals, the second digital power amplifier is used for processing low frequency sound signals, the first digital power amplifier output end outputs the processed middle and high audio signals to drive the left channel loudspeaker and the right channel loudspeaker to sound, and the second digital power amplifier output end outputs the processed low frequency sound signals to drive the woofer to sound.
As a further improvement of the utility model, the system comprises an I2S bus, and the output end of the TV SOC system is respectively connected with the input ends of the first digital power amplifier and the second digital power amplifier through the I2S bus.
As a further improvement of the utility model, the first digital power amplifier outputs left and right channel audio signals through a BTL mode amplifying circuit to drive the left channel loudspeaker and the right channel loudspeaker to sound.
As a further improvement of the utility model, the second digital power amplifier drives the woofer to sound through a mono mode and a PBTL amplifying circuit.
As a further improvement of the utility model, the system comprises a plurality of LC filter circuits, wherein one LC filter circuit is respectively connected between the first digital power amplifier and the left channel loudspeaker and between the second digital power amplifier and the woofer.
As a further improvement of the utility model, the number of the woofers is one or two.
As a further improvement of the present utility model, the woofer is an subwoofer.
The beneficial effects of the utility model are as follows: the system for realizing 2.1 and 2.2 channel power amplification based on the digital audio power amplification has an independent low-frequency unit and has good bass effect.
Drawings
FIG. 1 is a logical block diagram of a 2.1 channel circuit of the present utility model;
FIG. 2 is a circuit diagram of a practical application reference of the 2.1 channel of the present utility model;
FIG. 3 is a logical block diagram of the 2.2 channel circuit of the present utility model;
fig. 4 is a circuit diagram of a practical application reference of the 2.2 channel of the present utility model.
Detailed Description
Noun interpretation:
I2S-an integrated circuit built-in audio bus;
power amplifier-power amplification;
2.1 channels-2 mid-treble channels +1 subwoofer channels;
2.2 channels-2 mid-treble channels +2 heavy bass channels.
As shown in fig. 1-4, the utility model discloses a system for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification, which utilizes a single group of I2S signals to transmit to two digital audio power amplification systems, can separate a middle-high frequency sound signal and a low frequency sound signal independently (more than 100Hz is middle-high frequency, and less than 100Hz is low frequency), one digital audio power amplifier outputs a middle-high audio signal to drive left and right channel horns, and the other digital audio power amplifier outputs a low frequency sound signal to drive one or two subwoofers to form a 2.1 channel or 2.2 channel system.
The utility model discloses a system for realizing 2.1 and 2.2 channel power amplification based on a digital audio power amplifier, which comprises a TV SOC system US1, a first digital power amplifier U1 and a second digital power amplifier U3, wherein the TV SOC system US1 is respectively connected with the input end of the first digital power amplifier U1 and the input end of the second digital power amplifier U3, the output end of the first digital power amplifier U1 is respectively connected with a left channel loudspeaker and a right channel loudspeaker, the output end of the second digital power amplifier U3 is connected with an overweight woofer, the first digital power amplifier U1 is used for processing medium-high audio sound signals, the second digital power amplifier U3 is used for processing low-frequency sound signals, the output end of the first digital power amplifier U1 outputs the processed medium-high audio signals to drive the left channel loudspeaker and the right channel loudspeaker to sound, and the output end of the second digital power amplifier U3 outputs the processed low-frequency sound signals to drive the overweight woofer to sound.
The system comprises an I2S bus, and the output end of a TV SOC system US1 is respectively connected with the input ends of a first digital power amplifier U1 and a second digital power amplifier U3 through the I2S bus.
The I2S bus includes three signals:
1. the left and right channel selection signals or frame clock frequency i2s_wclk, consistent with the sampling frequency of the audio;
2. a serial clock signal i2s_sclk having a frequency equal to the product of the frame clock frequency and the bit number of the audio samples multiplied by 2;
3. left and right channel serial audio digital signals i2s_data.
The system comprises a plurality of LC filter circuits, wherein one LC filter circuit is respectively connected between a first digital power amplifier U1 and a left channel loudspeaker and between a second digital power amplifier U3 and an overweight bass loudspeaker.
Principle of operation:
1. I2S bus signals output from the TV SOC system US1 respectively enter a digital audio power amplifier integrated circuit (a first digital power amplifier U1 and a second digital power amplifier U2), DSP (digital processor), PDM (pulse density modulation), DPC (digital Signal to PWN pulse signal) conversion, audio signal amplification and other modules are processed in the digital audio power amplifier integrated circuit (the first digital power amplifier U1 and the second digital power amplifier U2), and then output from the output end of the digital audio power amplifier integrated circuit, and audio signals are solved through an LC filter to drive left and right channel loudspeakers to sound.
2. The first digital power amplifier U1 of the circuit logic block diagram of the utility model processes medium and high audio frequency (100 Hz-20 KHz) sound signals, and outputs left and right Channel audio signals through a BTL mode amplifying circuit to drive left and right Channel speakers (channel_L left speaker and channel_R right speaker) to sound to form a stereophonic sound system.
3. The second digital power amplifier U2 of the circuit logic block diagram of the utility model processes low-frequency (below 100 Hz) sound signals and drives the SUB-WOOFER sub_WOOFER through a mono-mode and a PBTL (two groups of BTL circuits are connected in parallel) amplifying circuit.
4. The frequency band selection of the audio signal is regulated by the EQ (frequency equalization) function of the digital audio power amplifier integrated circuit, so that the first digital power amplifier U1 processes and amplifies signals in a medium-high frequency band (100-20 KHz), and the second digital power amplifier U2 processes and amplifies signals in a low frequency band (20-100 Hz).
5. Through the EQ (frequency equalization) adjustment of the first digital power amplifier U1 and the second digital power amplifier U2, the two amplification circuits BTL and PBTL form a 2.1-channel sound system.
The 2.2 channel sound system has the same logic principle as the 2.1 channel sound system, and the difference is that:
the second digital power amplifier U1 is connected with two woofers, namely a left Woofer Woofer_L4 and a right Woofer Woofer_R, and the second digital power amplifier U1 processes and amplifies audio signals in a low frequency range of 20-100 Hz through EQ (frequency equalization) adjustment, outputs low frequency signals of left and right channels through the BTL amplifying circuit module to drive the left Woofer Woofer_L and the right Woofer Woofer_R5, and plays low frequency sound.
The new stereo system using single group I2S audio signal to transmit to two power amplifier systems to drive two middle and high frequency sound plus single or two overweight bass sound, has independent low frequency unit
The beneficial effects of the utility model are as follows: the system for realizing 2.1 and 2.2 channel power amplification based on the digital audio power amplification has an independent low-frequency unit and has good bass effect.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (7)
1. A system for realizing 2.1 and 2.2 sound channel power amplification based on digital audio power amplification is characterized in that: the digital power amplifier comprises a TV SOC system (US 1), a first digital power amplifier (U1) and a second digital power amplifier (U2), wherein the TV SOC system (US 1) is respectively connected with the input end of the first digital power amplifier (U1) and the input end of the second digital power amplifier (U2), the output end of the first digital power amplifier (U1) is respectively connected with a left channel loudspeaker and a right channel loudspeaker, the output end of the second digital power amplifier (U2) is connected with a woofer, the first digital power amplifier (U1) is used for processing medium-high audio sound signals, the second digital power amplifier (U2) is used for processing low-frequency sound signals, the output end of the first digital power amplifier (U1) outputs the processed medium-high audio signals to drive the left channel loudspeaker and the right channel loudspeaker to sound, and the output end of the second digital power amplifier (U2) outputs the processed low-frequency sound signals to drive the woofer to sound.
2. The system according to claim 1, wherein: the system comprises an I2S bus, wherein the output end of the TV SOC system (US 1) is respectively connected with the input ends of the first digital power amplifier (U1) and the second digital power amplifier (U2) through the I2S bus.
3. The system according to claim 1, wherein: the first digital power amplifier (U1) outputs left and right channel audio signals through the BTL mode amplifying circuit to drive the left channel loudspeaker and the right channel loudspeaker to sound.
4. The system according to claim 1, wherein: and the second digital power amplifier (U2) drives the woofer to sound through a mono mode and a PBTL amplifying circuit.
5. The system according to claim 1, wherein: the system comprises a plurality of LC filter circuits, wherein one LC filter circuit is respectively connected between the first digital power amplifier (U1) and the left channel loudspeaker and between the second digital power amplifier (U2) and the woofer.
6. The system according to claim 1, wherein: the number of the woofers is one or two.
7. The system according to claim 1, wherein: the woofer is an overweight woofer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322566844.XU CN220798529U (en) | 2023-09-19 | 2023-09-19 | System for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322566844.XU CN220798529U (en) | 2023-09-19 | 2023-09-19 | System for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220798529U true CN220798529U (en) | 2024-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322566844.XU Active CN220798529U (en) | 2023-09-19 | 2023-09-19 | System for realizing 2.1 and 2.2 channel power amplification based on digital audio power amplification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220798529U (en) |
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2023
- 2023-09-19 CN CN202322566844.XU patent/CN220798529U/en active Active
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