CN105635915A - Audio spectrum columnar display - Google Patents
Audio spectrum columnar display Download PDFInfo
- Publication number
- CN105635915A CN105635915A CN201610114316.2A CN201610114316A CN105635915A CN 105635915 A CN105635915 A CN 105635915A CN 201610114316 A CN201610114316 A CN 201610114316A CN 105635915 A CN105635915 A CN 105635915A
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- frequency
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses an audio spectrum columnar display. The audio spectrum columnar display comprises an equalizer, an audio power amplification circuit, a filter, a columnar display circuit and a power source. The input of the equalizer is connected with an audio input while the output thereof is connected with an input of the audio power amplification circuit; the output of the audio power amplification circuit is connected with the input of the filter; the output of the filter is connected with the columnar display circuit; the power source respectively supplies power to the equalizer, the audio power amplification circuit, the filter and the columnar display circuit; the columnar display circuit comprises a light column and a driving circuit thereof; and the light column is composed of multiple light emitting diodes. The audio spectrum columnar display is simple in structure, can display the spectrum of audio signals intuitively and dynamically and can be detachably connected with a sound device. The audio spectrum columnar display regards an integrated block as a core, has a small number of peripheral components and parts, and is simple in circuit, steady in work, easy to produce and convenient to use.
Description
Technical field
The present invention relates to audio frequency frequency spectrum equipment, particularly audio frequency frequency spectrum column indicating meter.
Background technology
Present audio frequency frequency spectrum display device has problems: 1. high end audio equipment generally has audio frequency frequency spectrum display device, but structure comparison is complicated; 2. sound equipment and spectrum display apparatus are integrated, are not easily moved in other stereo sets; 3. circuit is complicated, and manufacture difficulty is big.
Summary of the invention
The technical problem to be solved in the present invention is to provide the audio frequency frequency spectrum column indicating meter that a kind of structure is simple, intuitively can dynamically show the frequency spectrum of sound signal.
In order to solve the problems of the technologies described above, the present invention provides following technical scheme:
Audio frequency frequency spectrum column indicating meter, comprises equalizer, audio power amplifier circuit, wave filter, column display circuit and power supply, and the input of equalizer connects audio frequency input, exports the input connecting audio power amplifier circuit; The output of audio power amplifier circuit connects the input of wave filter, and the output of wave filter connects column display circuit; Power supply is powered to equalizer, audio power amplifier circuit, wave filter and column display circuit respectively; Described column display circuit comprises light beam and driving circuit thereof, and light beam is made up of multiple photodiode.
Described equalizer comprises the wavetrap of multiple different center frequency; The input of each wavetrap all connects audio frequency input, and output signal all outputs to audio power amplifier circuit through op-amp gain.
Described wave filter is made up of the active second-order bandpass filter circuit that multiplex circuit structure is identical, and described column display circuit is multichannel; The signal input terminus of the active second-order bandpass filter circuit of multichannel is together in parallel and receives the output terminal of audio power amplifier circuit, and signal output terminal correspondence connects the signal input terminus of a road column display circuit.
Described active second-order bandpass filter circuit structure is: the output signal of audio power amplifier circuit connects the inverting input of operational amplifier successively after a resistance and an electric capacity, the in-phase input end ground connection of operational amplifier, output terminal connects the signal input terminus of a road column display circuit.
Described column display circuit is multichannel, the Dynamic Announce of the instantaneous level of multiple frequency arrowbands of corresponding different center frequency respectively, every road column display circuit comprises a slice point/bar display driving integrated circuit LM3914, the signal input terminus of this point/bar display driving integrated circuit LM3914 connects the signal output terminal of an active second-order bandpass filter circuit in road, its signal output terminal connects the negative electrode of 10 LEDs respectively, the anode of 10 LEDs connects power supply respectively, and these 10 LEDs form a road light beam.
The integrated chip that described audio power amplifier circuit is TDA2003 by model forms OTL low frequency power and amplifies circuit.
It is an advantage of the current invention that: structure is simple, the frequency spectrum that intuitively can dynamically show sound signal; It is connected with stereo set removedly. Audio frequency frequency spectrum column indicating meter is taking integrated piece as core, and peripheral component is little, and simple circuit, working stability, making are easy, easy to use.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of audio frequency frequency spectrum column indicating meter of the present invention.
Fig. 2 is the equalizer figure in Fig. 1, and in figure, A1 A6 is operational amplifier.
Fig. 3 is the schematic circuit of the audio power amplifier circuit in Fig. 1.
Fig. 4 is the filter circuit figure in Fig. 1.
Fig. 5 is the schematic circuit of the column display circuit in Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the technical scheme of the present invention is described in detail, but does not form limiting the scope of the invention.
As shown in Figure 1, audio frequency frequency spectrum column indicating meter, comprises equalizer, audio power amplifier circuit, wave filter, column display circuit and power supply, and the input of equalizer connects audio frequency input, exports the input connecting audio power amplifier circuit; The output of audio power amplifier circuit connects the input of wave filter, and the output of wave filter connects column display circuit; Power supply is powered to equalizer, audio power amplifier circuit, wave filter and column display circuit respectively; Described column display circuit comprises light beam and driving circuit thereof, and light beam is made up of multiple photodiode.
As shown in Figure 2, the signal of 100Hz��10kHz is divided into 5 frequency ranges and regulates by the equalizer of the present embodiment, comprising the wavetrap of 100Hz, 330Hz, 1kHz, 3.3kHz, 10kHz five Frequency points, each wavetrap comprises a potentiometer, a LC series resonant tank and an operational amplifier. Such as the wavetrap of 100Hz frequency, ground is equivalent to inductance L by electric capacity C2, electric capacity C3, resistance R1 and resistance R2, and electric capacity C2 is 0.033uF, and electric capacity C3 is 560pF, and resistance R1 is 100k ��, and resistance R2 is 1.2k ��. Inductance L and electric capacity C1 form LC series resonant tank, and series resonance is in 100Hz, and electric capacity C1 is 0.68uF. Operational amplifier A 1 is as follower, it is to increase signal quality. Potentiometer Rp1 is across between the in-phase input end of operational amplifier A 6 and reverse feedback input terminus, and its movable arm connects the electric capacity C1 of above-mentioned LC series resonant tank. When the movable arm of potentiometer Rp1 moves down, LC series resonant tank is little to the decay of tuning-points and neighbouring frequency component thereof in the in-phase end input signal of operational amplifier A 6; When the movable arm of potentiometer Rp1 moves up, LC series resonant tank makes the negative-feedback signal of operational amplifier A 6 be decayed, and the gain of corresponding frequencies component is improved by operational amplifier A 6. All the other frequencies notch filter circuit structure with the wavetrap of 100Hz frequency. The equalizer of the present embodiment adopts two panels LA6324 integrated chip, and every sheet LA6324 integrated chip comprises 4 operational amplifiers. Operational amplifier A 1-A5 corresponds respectively to the wavetrap of five Frequency points, and operational amplifier A 6 outputs to audio power amplifier circuit after the output signal to each wavetrap carries out gain.
As shown in Figure 3, described audio power amplifier circuit adopts integrated chip TDA2003, gets speaker resistor RL=4 ��, audio power amplifier circuit output rating Po=18W. 4th pin of integrated chip TDA2003 is the output terminal of audio power amplifier circuit, connects the signal input terminus IN of the 8 active second-order bandpass filter circuit in tunnel simultaneously.
Adopt 8 LM358 integrated chips respectively organization center frequency be the 8 active second-order bandpass filter circuit in tunnel of 100Hz, 200Hz, 400Hz, 800Hz, 1.6kHz, 3.2kHz, 6.4kHz, 12.8kHz; Every road active second-order bandpass filter circuit structure is all identical, as shown in Figure 4, the output signal of audio power amplifier circuit connects active second-order bandpass filter circuit signal input terminus IN, the 2nd pin of operational amplifier LM358 is connected successively, the 3rd pin ground connection of operational amplifier LM358 after resistance R41, electric capacity C42; 1st pin of operational amplifier LM358 is the signal output terminal OUT of active second-order bandpass filter circuit. The signal input terminus IN of the 8 active second-order bandpass filter circuit in tunnel is together in parallel and receives the output terminal of audio power amplifier circuit, and signal output terminal OUT receives the signal input terminus of 8 tunnel column display circuits respectively. In the active second-order bandpass filter circuit of each road, the parameter of components and parts and passband BW are as shown in table 1:
Table 1
The column display circuit of the present embodiment has 8 tunnels, every road column display circuit adopts a slice point/bar display driving integrated circuit LM3914 to drive 10 LED luminescences, these 10 LEDs form a road light beam, 8 tunnel column display circuits respectively corresponding mid-frequency be the Dynamic Announce of the instantaneous level of 8 frequency arrowbands of 100Hz, 200Hz, 400Hz, 800Hz, 1.6kHz, 3.2kHz, 6.4kHz and 12.8kHz. It is illustrated in figure 5 the circuit structure diagram of a wherein road column display circuit, wherein the 5th pin of LM3914 is signal input terminus, the corresponding signal output terminal OUT connecting the 1 active second-order bandpass filter circuit in tunnel, 1st, 10-18 pin is signal output terminal, connecting the negative electrode of 10 LEDs respectively, the anode of 10 LEDs connects power supply VCC respectively. The all same Fig. 5 of the circuit structure of all the other column display circuits. LM3914 lights in 10 LED with point-like pattern, or lights LED one by one with bar graph pattern.
Claims (6)
1. audio frequency frequency spectrum column indicating meter, it is characterised in that, comprise equalizer, audio power amplifier circuit, wave filter, column display circuit and power supply, the input of equalizer connects audio frequency input, exports the input connecting audio power amplifier circuit; The output of audio power amplifier circuit connects the input of wave filter, and the output of wave filter connects column display circuit; Power supply is powered to equalizer, audio power amplifier circuit, wave filter and column display circuit respectively; Described column display circuit comprises light beam and driving circuit thereof, and light beam is made up of multiple photodiode.
2. audio frequency frequency spectrum column indicating meter according to claim 1, it is characterised in that: described equalizer comprises the wavetrap of multiple different center frequency; The input of each wavetrap all connects audio frequency input, and output signal all outputs to audio power amplifier circuit through op-amp gain.
3. audio frequency frequency spectrum column indicating meter according to claim 2, it is characterised in that: described wave filter is made up of the active second-order bandpass filter circuit that multiplex circuit structure is identical, and described column display circuit is multichannel; The signal input terminus of the active second-order bandpass filter circuit of multichannel is together in parallel and receives the output terminal of audio power amplifier circuit, and signal output terminal correspondence connects the signal input terminus of a road column display circuit.
4. audio frequency frequency spectrum column indicating meter according to claim 3, it is characterized in that: described active second-order bandpass filter circuit structure is: the output signal of audio power amplifier circuit connects the inverting input of operational amplifier successively after a resistance and an electric capacity, the in-phase input end ground connection of operational amplifier, output terminal connects the signal input terminus of a road column display circuit.
5. audio frequency frequency spectrum column indicating meter according to claim 3, it is characterized in that: described column display circuit is multichannel, the Dynamic Announce of the instantaneous level of multiple frequency arrowbands of corresponding different center frequency respectively, every road column display circuit comprises a slice point/bar display driving integrated circuit LM3914, the signal input terminus of this point/bar display driving integrated circuit LM3914 connects the signal output terminal of an active second-order bandpass filter circuit in road, its signal output terminal connects the negative electrode of 10 LEDs respectively, the anode of 10 LEDs connects power supply respectively, these 10 LEDs form a road light beam.
6. audio frequency frequency spectrum column indicating meter according to claim 1, it is characterised in that: the integrated chip that described audio power amplifier circuit is TDA2003 by model forms OTL low frequency power and amplifies circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114316.2A CN105635915A (en) | 2016-03-01 | 2016-03-01 | Audio spectrum columnar display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610114316.2A CN105635915A (en) | 2016-03-01 | 2016-03-01 | Audio spectrum columnar display |
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| Publication Number | Publication Date |
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| CN105635915A true CN105635915A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610114316.2A Pending CN105635915A (en) | 2016-03-01 | 2016-03-01 | Audio spectrum columnar display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474694A (en) * | 2019-07-17 | 2019-11-19 | 西北工业大学 | A kind of underwater sound wake-up circuit |
| CN111342924A (en) * | 2020-03-07 | 2020-06-26 | 深圳市十盏灯科技有限责任公司 | Dynamic spectrum display method based on audio data |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2385492Y (en) * | 1999-01-11 | 2000-06-28 | 邓志刚 | Passive loudspeaker box audio frequency display screen |
| CN2738518Y (en) * | 2004-09-14 | 2005-11-02 | 李廷惠 | Illuminating device capable of flashing along with external audio frequency change |
| CN101118256A (en) * | 2007-08-24 | 2008-02-06 | 东南大学 | Portable electromagnetic radiation investigation apparatus |
| CN201491323U (en) * | 2009-03-09 | 2010-05-26 | 深圳市中兴移动通信有限公司 | Control drive circuit of music glaring color lamp |
| CN101977060A (en) * | 2010-11-12 | 2011-02-16 | 中国兵器工业集团第二一四研究所苏州研发中心 | Coordinate decoding module |
| CN205726352U (en) * | 2016-03-01 | 2016-11-23 | 广西理工职业技术学院 | Audible spectrum column display |
-
2016
- 2016-03-01 CN CN201610114316.2A patent/CN105635915A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2385492Y (en) * | 1999-01-11 | 2000-06-28 | 邓志刚 | Passive loudspeaker box audio frequency display screen |
| CN2738518Y (en) * | 2004-09-14 | 2005-11-02 | 李廷惠 | Illuminating device capable of flashing along with external audio frequency change |
| CN101118256A (en) * | 2007-08-24 | 2008-02-06 | 东南大学 | Portable electromagnetic radiation investigation apparatus |
| CN201491323U (en) * | 2009-03-09 | 2010-05-26 | 深圳市中兴移动通信有限公司 | Control drive circuit of music glaring color lamp |
| CN101977060A (en) * | 2010-11-12 | 2011-02-16 | 中国兵器工业集团第二一四研究所苏州研发中心 | Coordinate decoding module |
| CN205726352U (en) * | 2016-03-01 | 2016-11-23 | 广西理工职业技术学院 | Audible spectrum column display |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474694A (en) * | 2019-07-17 | 2019-11-19 | 西北工业大学 | A kind of underwater sound wake-up circuit |
| CN111342924A (en) * | 2020-03-07 | 2020-06-26 | 深圳市十盏灯科技有限责任公司 | Dynamic spectrum display method based on audio data |
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Application publication date: 20160601 |
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