CN203523026U - Passive filter circuit having equalization sound dividing and spread spectrum tuning functions - Google Patents

Passive filter circuit having equalization sound dividing and spread spectrum tuning functions Download PDF

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Publication number
CN203523026U
CN203523026U CN201320570010.XU CN201320570010U CN203523026U CN 203523026 U CN203523026 U CN 203523026U CN 201320570010 U CN201320570010 U CN 201320570010U CN 203523026 U CN203523026 U CN 203523026U
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China
Prior art keywords
resistance
electric capacity
filter circuit
pass
audio
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Expired - Fee Related
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CN201320570010.XU
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Chinese (zh)
Inventor
许美林
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SHENZHEN ZHONGYE SCIENCE & TECHNOLOGY Co Ltd
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SHENZHEN ZHONGYE SCIENCE & TECHNOLOGY Co Ltd
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Priority to CN201320570010.XU priority Critical patent/CN203523026U/en
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Publication of CN203523026U publication Critical patent/CN203523026U/en
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Abstract

The utility model provides a passive filter circuit having equalization sound dividing and spread spectrum tuning functions, and relates to the field of electroacoustics combined filter circuit technology. The passive filter circuit is composed of an LC high-pass filter circuit provided with adjusting resistors and phase delay capacitors, an LC low-pass filter circuit provided with adjusting resistors and audio mixing eliminating capacitors, and an intermediate-frequency audio filter tuning circuit which can be mixedly used and mutually adjusted for high-pass and high-pass LC filtering. A set of parallel filter circuits are designed aiming at defect of traditional electroacoustic equipment, audio electric signals at different frequency sections can pass through a channel well, the audio signals at the different frequency sections can equalizingly pass through by combination of all parallel filter channels, final input power amplification is obtained by adjusting resistances of the circuits, and a loudspeaker and a cavity are promoted to sound.

Description

The passive filter circuit of balanced partial and exhibition frequency modulation sound
Technical field:
The utility model relates to electroacoustics combined filter circuit engineering field, is specifically related to the passive filter circuit of balanced partial and exhibition frequency modulation sound.
Background technology:
Passive LC bandwidth-limited circuit conventionally adopts LC bandwidth-limited circuit to carry out the tuning of intermediate-frequency channel on traditional electroacoustic techniques; But lc circuit, the frequency-selecting in low frequency filtering is more concentrated, and is easily subject to the interference of high-frequency signal coupling.
Small-sized full frequency speaker, although frequency response curve and the damping curve in high, normal, basic frequency of separating is more far short of what is expected on curve than large loud speaker; But but in high, normal, basic whole frequency range, all can go out sound by response concurrent.Widely different between the miniature loudspeaker of same specification, and frequency response curve and damping curve have a great difference, the sounding that this makes normally used tuning transmission circuit cannot make little loud speaker all coordinate at full frequency band; And product is when selecting new loud speaker, usually need again to redesign the tuning transfer circuit matching, waste time and energy.
Toy trumpet system is because be more prone to function portable and that show, so the difference of outward appearance also becomes very large.Different sounding cavitys, has sympathetic response characteristic separately, and the Frequency point in resonance, can send unpleasant to hear case sound.This need to do corresponding processing on tuning circuit, avoids these audible frequencies or reduces the power output of these audible frequencies.
Portable card-inserted sound box and Baffle Box of Bluetooth, for the novel consideration of outward appearance, more and more cannot adopt traditional case design of closing; And meet again the needs of consumer to bass, have to adopt Floating loud speaker to install, install additional vibrating diaphragm etc., it is bimodal that these reality all make the damping curve of speaker system occur, in damping curve except middle pitch, in the slightly lower place of frequency, there is second damping peak value; During region sounding in the middle of two peak values, be easy to interfere with each other and occur reverberation; Existing tuning circuit is difficult to solve the problem of this inhibition reverberation.
Utility model content:
The purpose of this utility model is to provide the passive filter circuit of balanced partial and exhibition frequency modulation sound, it is for the defect of existing electroacoustic equipment, design the filter circuit of one group of parallel connection, allow the audio electrical signal of different frequency segmentation well pass through on a passage, make the combination of the filtering channel of all parallel connections can allow the audio signal of each frequency range can balanced passing through, can adjust by the resistance on circuit, obtain final input power amplifier, the sound that promotion loudspeaker, cavity send.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it comprises resistance one-resistance seven R1-R7, electric capacity one-electric capacity eight C1-C8, the input IN of filter circuit respectively with one end of electric capacity one C1, one end of electric capacity five C5, one end of electric capacity four C4, one end of resistance six R6 connects, the other end of electric capacity one C1 respectively with one end of resistance one R1, one end of resistance two R2 connects, resistance one R1 and ground connection in parallel with electric capacity three C3, the other end of resistance two R2 is connected with output OUT, the two ends of resistance two R2 are parallel with electric capacity two C2, the other end of electric capacity five C5 is connected with resistance three R3, resistance three R3 connect output OUT, the other end of electric capacity four C4 is connected with resistance four R4 one end, resistance four R4 other end ground connection, and resistance four R4 are in parallel with electric capacity six C6, the other end of resistance six R6 respectively with one end of resistance five R5, one end of electric capacity seven C7 connects, the other end of resistance five R5 is connected with output OUT, electric capacity seven C7 connect with resistance seven R7 with after electric capacity eight C8 parallel connections, resistance seven R7 other end ground connection.
The utlity model has following beneficial effect: it is for the defect of existing electroacoustic equipment, design the filter circuit of one group of parallel connection, allow the audio electrical signal of different frequency segmentation well pass through on a passage, make the combination of the filtering channel of all parallel connections can allow the audio signal of each frequency range can balanced passing through, can make senior middle school's bass of the better output coordinating equilibrium of miniature loudspeaker system of single loudspeaker, thereby make sound more melodious; The proportioning of the senior middle school's bass in the time of can freely adjusting the output of each loud speaker and stress frequency range is coordinated again between mutually very much; Allow user can obtain more easily the sound of wanting; Speaker-matched and cavity, change loud speaker or cavity in shortening global design better, because the difference of frequency response and damping need to be changed design and debugging for a long time on plate, thereby delay design and produce consuming time; Compare the balanced tuning design of active power filtering, cost is low, low in energy consumption.
Accompanying drawing explanation:
Fig. 1 is the utility model circuit theory diagrams.
Embodiment:
Referring to Fig. 1, this embodiment is by the following technical solutions: it comprises resistance one-resistance seven R1-R7, electric capacity one-electric capacity eight C1-C8, the input IN of filter circuit respectively with one end of electric capacity one C1, one end of electric capacity five C5, one end of electric capacity four C4, one end of resistance six R6 connects, the other end of electric capacity one C1 respectively with one end of resistance one R1, one end of resistance two R2 connects, resistance one R1 and ground connection in parallel with electric capacity three C3, the other end of resistance two R2 is connected with output OUT, the both sides of resistance two R2 are parallel with electric capacity two C2, the other end of electric capacity five C5 is connected with resistance three R3, resistance three R3 connect output OUT, the other end of one end of electric capacity four C4 is connected with resistance four R4 one end, resistance four R4 other end ground connection, and resistance four R4 are in parallel with electric capacity six C6, the other end of resistance six R6 respectively with one end of resistance five R5, one end of electric capacity seven C7 connects, the other end of resistance five R5 is connected with output OUT, electric capacity seven C7 connect with resistance seven R7 with after electric capacity eight C8 parallel connections, resistance seven R7 other end ground connection.
This embodiment, for the audio electrical signal in descant district, has designed one with regulating resistance and the LC high-pass filtering circuit that prolongs phase place electric capacity; So that high pitch part can regulate more mellow and fullly, and middle bass part is more coordinated; The device of the filter circuit of high pitch comprises: electric capacity one C1, electric capacity two C2, electric capacity three C3; Resistance one R1, resistance two R2; Resistance two R2, the adjusting device that wherein electric capacity one C1, electric capacity two C2 are innovative usage.
This embodiment is for the audio electrical signal in the minimum range of sound, designed the LC low-pass filter circuit of band regulating resistance and audio mixing (case sound) electric capacity that disappears, so that the audio signal in the minimum range of sound is well by circuit, with middle pitch coordinate after power amplifier amplifies, promote in phase loud speaker; And by regulating certain several device parameters, make speaker system can send user required supper bass intensity and scale, also can suppress the phenomenon of the incident case sound of bass and reverberation; The device of the filter circuit of bass comprises: electric capacity seven C7, electric capacity eight C8, resistance five R5, resistance six R6, resistance seven R7; The adjusting device that wherein electric capacity eight C8, resistance six R6, resistance seven R7 are creative use.
This embodiment, for the audio electrical signal of middle range, has designed high low pass LC filtering mixed, the middle pitch filtering tuning circuit regulating each other; Can select very cheaply the frequency range of the audio electrical signal that middle pitch partly passes through; And user can use one group or several groups, (cost angle is considered: recommendation 1-3 group) obtain the middle pitch audio electrical signal oneself needing; The device of middle pitch spatially selecting filtering circuit comprises: electric capacity four C4, electric capacity five C5, electric capacity six C6, resistance three R3, resistance four R4; By calculating the parameter of these devices, can on the passage of each middle pitch, obtain the audio electrical signal that user needs frequency range, the transmission respectively of several passages, can be so that loud speaker obtains purer and non-interfering middle pitch audio electrical signal.
The circuit of this embodiment, the device parameters by COMPREHENSIVE CALCULATING adjustment combination passage, can make the more outstanding people's audio frequency range of speaker system, supper bass frequency range, high pitch frequency range, so that whole speaker system is more suitable for listening song or certain instrumental music.
This embodiment circuit application is in multi-loudspeaker system, respectively by one group, drive single loud speaker, can make each loud speaker export the sound that the high, normal, basic Association of Musicians adjusts, and can be by the device parameters in modification circuits, make the sounding phase place between loud speaker variant, thereby widen multi-loudspeaker system sound field.
This embodiment has following beneficial effect: it is for the defect of existing electroacoustic equipment, design the filter circuit of one group of parallel connection, allow the audio electrical signal of different frequency segmentation well pass through on a passage, make the combination of the filtering channel of all parallel connections can allow the audio signal of each frequency range can balanced passing through, can make senior middle school's bass of the better output coordinating equilibrium of miniature loudspeaker system of single loudspeaker, thereby make sound more melodious; The proportioning of the senior middle school's bass in the time of can freely adjusting the output of each loud speaker and stress frequency range is coordinated again between mutually very much; Allow user can obtain more easily the sound of wanting; Speaker-matched and cavity, change loud speaker or cavity in shortening global design better, because the difference of frequency response and damping need to be changed design and debugging for a long time on plate, thereby delay design and produce consuming time; Compare the balanced tuning design of active power filtering, cost is low, low in energy consumption.

Claims (1)

1. the passive filter circuit of balanced partial and exhibition frequency modulation sound, it is characterized in that it comprises resistance one-resistance seven (R1-R7), electric capacity one-electric capacity eight (C1-C8), the input IN of filter circuit respectively with one end of electric capacity one (C1), one end of electric capacity five (C5), one end of electric capacity four (C4), one end of resistance six (R6) connects, the other end of electric capacity one (C1) respectively with one end of resistance one (R1), one end of resistance two (R2) connects, resistance one (R1) and ground connection in parallel with electric capacity three (C3), the other end of resistance two (R2) is connected with output OUT, the two ends of resistance two (R2) are parallel with electric capacity two (C2), the other end of electric capacity five (C5) is connected with resistance three (R3), resistance three (R3) connects output OUT, the other end of electric capacity four (C4) is connected with resistance four (R4) one end, resistance four (R4) other end ground connection, and resistance four (R4) is in parallel with electric capacity six (C6), the other end of resistance six (R6) respectively with one end of resistance five (R5), one end of electric capacity seven (C7) connects, the other end of resistance five (R5) is connected with output OUT, after electric capacity seven (C7) is in parallel with electric capacity eight (C8), connect with resistance seven (R7), resistance seven (R7) other end ground connection.
CN201320570010.XU 2013-09-10 2013-09-10 Passive filter circuit having equalization sound dividing and spread spectrum tuning functions Expired - Fee Related CN203523026U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320570010.XU CN203523026U (en) 2013-09-10 2013-09-10 Passive filter circuit having equalization sound dividing and spread spectrum tuning functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320570010.XU CN203523026U (en) 2013-09-10 2013-09-10 Passive filter circuit having equalization sound dividing and spread spectrum tuning functions

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CN203523026U true CN203523026U (en) 2014-04-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106488350A (en) * 2015-08-27 2017-03-08 比亚迪股份有限公司 Earphone
CN108932939A (en) * 2017-05-26 2018-12-04 南京大学 It is a kind of to have the slim sound absorption structure and its design method for adjusting noise for low frequency

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106488350A (en) * 2015-08-27 2017-03-08 比亚迪股份有限公司 Earphone
CN106488350B (en) * 2015-08-27 2019-11-22 比亚迪股份有限公司 Earphone
CN108932939A (en) * 2017-05-26 2018-12-04 南京大学 It is a kind of to have the slim sound absorption structure and its design method for adjusting noise for low frequency

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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: 20140402

Termination date: 20160910