CN205017550U - Novel frequency divider of audio amplifier - Google Patents
Novel frequency divider of audio amplifier Download PDFInfo
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- CN205017550U CN205017550U CN201520777915.3U CN201520777915U CN205017550U CN 205017550 U CN205017550 U CN 205017550U CN 201520777915 U CN201520777915 U CN 201520777915U CN 205017550 U CN205017550 U CN 205017550U
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- frequency
- high pitch
- dividing circuit
- inductance
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Abstract
The utility model discloses a novel frequency divider of audio amplifier, including well bass frequency dividing circuit and high pitch frequency dividing circuit, well bass frequency dividing circuit is including inductance L2 and the well woofer of series connection in closed -loop, and inductance L2 connects in parallel has electric capacity C2 to inductance L2 still connects in parallel has resistance R2, high pitch frequency dividing circuit including establish ties in closed -loop electric capacity C1 and high pitch loudspeaker and adopt the shunt inductance L1 that 12 decibels / octave designed. The beneficial effects of the utility model are that: can cross effective balanced in middle -size and small -size in woofer frequency response curve peak value, make full use of middle -size and small -size speaker frequency response curve peak value with top to the frequency band of in small -size woofer has been extended in effective exhibition, with the effect of the large -scale audio amplifier of small -size audio amplifier realization. Improved frequency division point, the reduction frequency divider has reduced the power of high pitch loudspeaker, the requirement of tone quality the influence of sound to the cost is reduced.
Description
Technical field
The utility model relates to a kind of novel frequency divider of audio amplifier, is specially adapted to adopt small-sized woofer to make the audio amplifier of medium and low frequency unit.
Background technology
Traditional frequency divider is the low pass filter that medium and low spectrum loudspeaker generally designs a 6 six decibels/octave or 12 6 decibels/octave, high pitch loudspeaker designs a similar high pass filter, as shown in Figure 1, structure is an inductance L of connecting on medium and low spectrum loudspeaker
2an electric capacity C in parallel
2.The shortcoming of this convenient divider network is that efficiency is low, and the frequency power more than the part-frequency point of design is bypassed electric capacity C
2bypass, the restriction choosing and be subject to peak or paddy in loud speaker frequency response curve of part-frequency point.Small-sized medium and low spectrum loudspeaker is by volume, vibrating diaphragm area, the reason sensitivity such as magnetic structure are high not as larger type speakers, if mix again this traditional low pass filter finally combine after speaker system sensitivity can be lower, when the frequency response curve of medium and low spectrum loudspeaker has peak or the paddy of open-wire line, the frequency divider designed based on this conventional lowpass filter can not the frequency response of efficient balance loud speaker, part-frequency point can only be reduced with the uneven part of the frequency response avoiding loud speaker, after reducing part-frequency point, the burden of high pitch loudspeaker needs the high pitch loudspeaker of the relatively high-power high tone quality of configuration, which increase cost, after reducing part-frequency point, serious meeting causes part-frequency point to enter into the range part of voice and most of musical instrument simultaneously, can have a negative impact to sound performance.
Summary of the invention
For solving above technical deficiency, the utility model provides a kind of novel frequency divider of audio amplifier, and effective broadening frequency band of small-sized medium and low spectrum loudspeaker, realizes the effect of large-scale audio amplifier with small-size sound box.
The utility model is realized by following measures:
The novel frequency divider of a kind of audio amplifier of the present utility model, comprises middle bass frequency dividing circuit and high pitch frequency dividing circuit, and described middle bass frequency dividing circuit comprises series connection inductance L in the closed circuit
2and medium and low spectrum loudspeaker, described inductance L
2be parallel with electric capacity C
2, and inductance L
2also be parallel with resistance R
2; Described high pitch frequency dividing circuit comprises series connection electric capacity C in the closed circuit
1and high pitch loudspeaker.
High pitch loudspeaker in above-mentioned high pitch frequency dividing circuit also can shunt inductance L again
1,.Composition 12 decibels/octave high pitch frequency dividing circuit.
The beneficial effects of the utility model are: can cross peak value in the middle-size and small-size medium and low spectrum loudspeaker frequency response curve of efficient balance, take full advantage of middle-size and small-size loud speaker frequency response curve peak value with upper part, thus the effective broadening frequency band of small-sized medium and low spectrum loudspeaker, the effect of large-scale audio amplifier is realized with small-size sound box.Improve part-frequency point, reduce frequency divider to the impact of sound, reduce the requirement of the power to high pitch loudspeaker, tonequality, thus reduce cost.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of existing frequency divider.
Fig. 2 is the circuit theory diagrams of a kind of form of the present utility model.
Fig. 3 is the circuit theory diagrams of another kind of form of the present utility model.
Wherein: 1 high pitch loudspeaker, 2 medium and low spectrum loudspeakers.
Embodiment
Below in conjunction with accompanying drawing, further detailed description is done to the utility model:
As shown in Figure 2, the novel frequency divider of a kind of audio amplifier of the present utility model, comprises middle bass frequency dividing circuit and high pitch frequency dividing circuit, and middle bass frequency dividing circuit comprises series connection inductance L in the closed circuit
2with medium and low spectrum loudspeaker 2, inductance L
2be parallel with electric capacity C
2, and inductance L
2also be parallel with resistance R
2; High pitch frequency dividing circuit comprises series connection electric capacity C in the closed circuit
1with high pitch loudspeaker 1.Or as shown in Figure 3, keep original high pitch frequency dividing circuit constant, high pitch frequency dividing circuit comprises series connection electric capacity C in the closed circuit
1with high pitch loudspeaker 1, high pitch loudspeaker 1 is parallel with inductance L
1.
Significantly can be decayed the frequency of resonance central point, and central point relies on R in LC network to the attenuation rate at two ends
2value adjust, inductance L
2with electric capacity C
2parameter value can calculate according to loud speaker frequency dividing circuit computing formula, such as will form a central point is that the filter of 2500Hz draws L=1mHC=4 μ F according to formula according to calculation.Resistance R in parallel
2for adjusting the bypass resistance of filtered amplitude, the frequency response curve according to medium and low spectrum loudspeaker 2 mates.Eliminate the sensitivity that shunt capacitance improves the speaker system after combination.High pitch loudspeaker 1 part-frequency point increases substantially, and reduces and reduces cost to the power of high pitch loudspeaker 1, the requirement of tonequality.Part-frequency point, outside the range of voice and most of musical instrument, improves the tonequality of speaker combination.
The above is only the preferred implementation of this patent; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the art of this patent principle; can also make some improvement and replacement, these improve and replace the protection range that also should be considered as this patent.
Claims (2)
1. a novel frequency divider for audio amplifier, comprises middle bass frequency dividing circuit and high pitch frequency dividing circuit, its feature
Be: described middle bass frequency dividing circuit comprises series connection inductance L in the closed circuit
2and medium and low spectrum loudspeaker, described inductance L
2be parallel with electric capacity C
2, and inductance L
2also be parallel with resistance R
2; Described high pitch frequency dividing circuit comprises series connection electric capacity C in the closed circuit
1and high pitch loudspeaker.
2. the novel frequency divider of audio amplifier according to claim 1, is characterized in that: the high pitch loudspeaker in described high pitch frequency dividing circuit is parallel with inductance L
1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520777915.3U CN205017550U (en) | 2015-10-09 | 2015-10-09 | Novel frequency divider of audio amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520777915.3U CN205017550U (en) | 2015-10-09 | 2015-10-09 | Novel frequency divider of audio amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205017550U true CN205017550U (en) | 2016-02-03 |
Family
ID=55216131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520777915.3U Active CN205017550U (en) | 2015-10-09 | 2015-10-09 | Novel frequency divider of audio amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205017550U (en) |
-
2015
- 2015-10-09 CN CN201520777915.3U patent/CN205017550U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181120 Address after: Room 303, 305, 306 and 307, Jinzhu Building, 128 Jinfeng Road, Mudu Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Emmy Film Technology Development Co., Ltd. Address before: 250000 New Oriental Garden Building 5 Unit 202, Lixia District, Jinan City, Shandong Province Patentee before: Liu Jian |
|
| TR01 | Transfer of patent right |