CA1330201C - Frequency dividing network for a multi-way speaker system - Google Patents
Frequency dividing network for a multi-way speaker systemInfo
- Publication number
- CA1330201C CA1330201C CA000608506A CA608506A CA1330201C CA 1330201 C CA1330201 C CA 1330201C CA 000608506 A CA000608506 A CA 000608506A CA 608506 A CA608506 A CA 608506A CA 1330201 C CA1330201 C CA 1330201C
- Authority
- CA
- Canada
- Prior art keywords
- dividing
- frequency
- sound
- delaying
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/02—Manually-operated control
- H03G3/14—Manually-operated control in frequency-selective amplifiers
-
- 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
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
- H04R3/14—Cross-over networks
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
Abstract
ABSTRACT
A frequency deviding network for a multi-way audio system which devides output signals from the main amplifier into multiple frequency band by use of A/D converter and multiple counters, each of which corresponds to the relevant band, and selectively drives one of multiple speaker units to regenerate the sound.
A frequency deviding network for a multi-way audio system which devides output signals from the main amplifier into multiple frequency band by use of A/D converter and multiple counters, each of which corresponds to the relevant band, and selectively drives one of multiple speaker units to regenerate the sound.
Description
~ 3 3 0 2 ~ 1 ~
FREQUENCY DIVIDING NETWORK FOR A MULTI-WAY ~
SP~6;~
AUDIO SYSTEM
Technical field The present invention relates to a ~requency dividing network for an audio system, and more particularly to a -frequency dividing network for an audio system provided with multi-way speaker system.
Brief Descri~tjon of Drawin~s Other objects, features, and advantages of the present invention will be apparent from the descriptions in connection with following drawings.
1'~ ~ :-Fig. 1A shows a systematic diagram for a conventional frequency dividing net-work system, LC network system, Fig. 1B shows a systematic diagram for another conventional frequency dividing network system, multi-channel amplifier system, and ~ Fig. 2 shows a systematic diagram for a preferred i~ embodiment of the invention, an example of frequency ~
;~, dividing network especially for a 3-way speaker system. ~-Backaround of the inventiQn In general, multi-way audio (or speaker) system means a system which divides outputs of a sound source into several sound bands, and use multiple speaker units corresponding to the said souncl bands. And the device which divides sound ''~'` l33~2a~
bands and allocates them to a relevant speaker unit as above is called "dividing network (or circuit) .
Conventional systems which have been generally used for the dividing network are two types, namely LC network system and multi-channel amplifier system.
FIG.1A shows the above LC network system in which sound signals generated from a sound source, controlled by pre-amplifier PA and amplified by main-amplifier MA are supplied to a LC network LC. The LC network LC
compriing coils and capacitors divides the said sound signals into multiple bands (3 bands in the drawtng) according to their frequencies, and selectively feeds them to the corresponding speaker unit SP1, SP2 or SP3 to be reproduced.
LC network system as described above filters frequencies by use of the characteristic of coil and capacitor the impedanc~ of which vary with frequencies of input signals. But impedances of connected speaker units also greatly vary with frequencies of input signals, and the .
crossover frequencles and~or the slope characteristics of them vary accordingly, and thus the tone quality of the -~
audio system may deteriorats. Furthermore, there arise another problems that a fall of the damping for the low sound, and unstabilily of mid and high sound characteristics -. ~ - -due to the register of the device such as coil.
FIG. 1B shows a multi-channel amplifier system in which -~ : :,, sound signals from a sound source is controlled by pre- ~ ~
, . , ` ~ ;.~, .
;: ``' ~,,, ~ ; 33~
amplifier PA and feeds to a channel divider CD. The channel divider CD divides the said sound signals into multiPl~ bands (3 bands in the drawhg~ according to their frequencies, and divided signals are amplified by one of multiple amplifiers MAl, MA2 or MA3, selectively, and ~ed to corresPondins speaker SP1, SP2 or SP3 to be reproducedu This type of dividing network does not yield the problem of deterioration of the tone qual1ty, or intermodulation as bandwidth of the input audio signal fed to main amplifiers is narrowed, and significantly reduces distortion in the case of large volume reproduction as it can produce sufficient output due to multiple main amplifiers.
~;Though the mu~ti-channel amplifier system can produce a sound of superior tone quality, the cost of this system is very high due to the installation of as many amplifiers as the number of sound way, and controlling of crossover frequencies and ballancing of sound level of each spaaker unit are very difficult.
..
.- . .. :, ~ummarv of invention Accordingly, the object of the present invention is to . -provide a frequency dividing network ~or a multi-way audio - `-syst~m which can divide output signals from sound source of an audio system according to their frequsncy bands using a --~
digital technique, and selectively drive a corresponding :: :
i~
~-~ 4 ~ 3 ~
speaker unit among multiple speaker un;ts to reproduce khe output signals from the sound source.
To accomplish the above object, frequency dividing network in accondance with the present invention which is used for a multi-way audio system having a sound source wh1ch generates sound signals, a pre-amplifier which selects and controlls the said sound signals from the sound source, a main amplifier which ampl;fies the output signals from the said pre-amplifier, multiple speaker units which have relevant frequency bands, comprises;
a converting means for converting the analog signal outputs of the said main amplifier into digital signals:
a dividing means for dividing the converted digital signals according to their corresponding frequency bands;
a delaying means for delaying the sound signal outputs from the said main amplifier; and a switching means for selectively driving one of multiple speaker units respectively corresponding to the divided signal bands by selecting said main amplifier output signals from said delaying means according to the divided output signal from said dividing means.
Detailed descriction of the_invention ~
A frequency dividing network shown in Fig.2 is provided , with a pre-amplifier 10 which selects and controlls the ~' ~
,;
`3 ~:
``I .
~L~3~20~
sound signals supplied from a sound source (tuner or record player, tape deck, compact disc player and the 1ike), a main amplifier 20 which amplifies the output signals from the said pre-amplifier 20 to the predetermined level, and three speaker units 80, each of which is generally called woofer 80A, squawker 80B, tweeter 80C, respectlvely corre~ponding to loW, mid and high sound.
For converting the analog signal outputs from the main amplifier 10, A/D converter 30 is provided and connected to the main amplifier 1Q for dividing the above digitized signals into respective seperated frequency bands, a frequency dividing unit 50 ;s provided and a clock pulse generator 40 is provided for feeding referenGe pulses to the frequency diving unit 50.
The frequency dividing unit 50 is composed of the 1st, 2nd,3rd counter 50A,50B,50C which divide the digital signal outputs from the A~D converter 30 according to their frequencies. The 1st counter 50A is operated when the .~
output frequency of the A/~ converter 30 corresponds to a low sound band(for example, below 1~ ); the 2nd counter 50B
is operated when the output frequency of the A/D converter corresponds to a mid fraquency sound band(for example,l~ -5~ ); and the 3rd counter 50C is operated when the output frequency of the A/D converter corresponds to a hi~h sound band(for example, above 5~ ).
~ .
6 1~3~2~ :
The clock pulse gsnerator 40 is constikuted to provide a clock pulse to each counter 50A,50B,SOC so that the said counters 50A,50B,50C can be synchronized dur;ng frequency counting of input signals.
The sound signal outputs from the main amplif;er 20 feed to the ~elaying means ~0 wh~ch de1ays the above signals by d;fferent delay times, sa;d delay;ng means ts composed of the 1st, 2nd, 3rd dalaying units 60A,60B,60C, each of which corresponds to the counters ~OA, 50B, 50C, respactively.
A switch;ng unit 70 is provided for select;ng the sound signals delayed by the above delaying units 60A, 60B, 60C according to the output signals of the counters 50A, 50B, 50G, and subsquently driving one of several speaker units 80A, 80B, 80C. The switch~ng un;t ;s composed of tha 1st,2nd,3rd sw;tches 70A, 70B, 70C.
The sa;d delaying units 60A, 60B, 60C are used to compensate the transmission delay of sound signals caused by the time raqu;red for A/D convers;on and frequency count;ng, and switching. Therefore, delay time of each delay units 60A, 60B, 60C corresponds to the sum of the time required for converting the anAlog output signal from the main amplifier 20 to digital signal at the A/D converter 30; the time required for countin~ the frequency of digital signal ..
at the counters 50A, 50B, 50C; and the time for turning ON' switches 70A or 70B or 70C according to the "High signal from one of the counters 50A, 50B, 50C.
~ ~ :
7 ~L33a20~
For the purpose of preventing unnecessary counting of counters, it is preferable to be providsd with a filterlng means to cut off vsry h1gh frequency signals (far example over 20 ~ ~ which are beyond human audio frequency.
Now, the operation of the frequency dividing network constituted as descr;bed above will be expla1ned in detail.
In Fig. 2, the sound signal from the sound source is selected to a relavant mode, and controlled to a preferable form to be amplifled at the pre-amplifier 10, and is fed to main amplifier 20. Then the signal is amplified by the maln amplifier 20 to a level sufficient to drive the speaker units 80A, 80B, 80C.
The signal amplified by the main amplifier 20 is applled to the delaying units 60A,60B,60C and to the A/D
converter 30. The signal output from the main amplifier 20 is an analog signal, The A~D (Analog/Digital) converter 30 converts the analog signal input into a digital signal ~or output. This digital signal is entered in the counters 50A, 50B, 50C and its frequencies are counted. Then, these counters 50A, 50B, 50C are synchronized with the clock signal generated from the clock pulse generator 40, and count the frequency of digital signal înput, namely frequency of output signal from tha main amplifier 20.
The operation of the counters 50A, 50a, 50C are as follows. The 1st counter 50A outputs a HIGH" signal in the 8 ~3~
case of counting input ~requenc;es which correspond to the low sound band, i.e., sound containing frequencies below 1k~ and a LOW signal for input ~requencies above 1~ . The 2nd counter outputs a "HIGH" signal for middle frequency sound, ;.e., sound containing frequenc;es from 1~ to 5 and a LOW signal for other frequencies. The 3rd counter outputs a HIGH signal for the high frequency, i.e., sound .: .. ..
conta;ning frequenc;es above 5~k, and a LOW signal for ;nput frequenc;es below 6~ .
Now, assume that the sound source generates a signal wh;ch corresponds to low band, for example 500~ . Then the digital signal of 500~ is suppl;ed to the counters ~OA, 50B
and 50C. The output of the 1st counter 50A becomes 'HIGH
and the outputs for other counters 50B, 50C become 'LOW".
Therefore, since the 1st switch 70A ;s turned ON, and the other sw;tches 70B, 70C are turned OFF, the output analog signal from the main amplifier~20), which passes through the . ~:
1st delay un;t 60A, is suppl;ed to the 1st speaker, the woofer 80A, and the 1QW sound is regenerated.
Likew;se, squawker ~80B ;s dr;ven to regenerate m1d sound when a signal corresponds to mid sound band is :
~enerated from sound source, and tweeter 80C is driven for :
high sound band.
Up to now, descriptions have been made for the specific example ;n which the princ;plas of the present invention is : , ~.
appl;ed to the 3-way speaker system, this ;nvention ;s also ~
' ;' ' ' , 9 ~33i~0~L
appl;cable to the 2-way or 4-way speaker system. In such cases, constitutions and operations of them are sim;lar to those of 3-way system except that the number of counters, delaying units, speaker units de~)end on the number of ways. ;~
As descr;bed above, the t`requency d;v~d;ng ne~work accord;ng to the present invention div;des frequency bands of output s;gnal from the ma;n ampl;fier by use of the A/D
~; converter and counters, not mul~iple amplif;er as mult;~
channel amplif;er systemt the system cost of ;t ;s very low~
and it ;s very easy to control and balance the system.
Moreover, it does not cause the deter10ration or instab;lity of tone qual;ty as LC network system. As a result, the present invention can prov;de an aud;o system of super;or tone quality and low cost.
Although the ;nvent;on has been descr;bed ;n its preferred embodtment with a certa;n degree of par~icularity, it should be understood that the lnvention is not limited to the spec;f;c embod;ment therof except as defined ;n the appended cla;ms.
:.
' `: :
: ":
.
:'~ , '
FREQUENCY DIVIDING NETWORK FOR A MULTI-WAY ~
SP~6;~
AUDIO SYSTEM
Technical field The present invention relates to a ~requency dividing network for an audio system, and more particularly to a -frequency dividing network for an audio system provided with multi-way speaker system.
Brief Descri~tjon of Drawin~s Other objects, features, and advantages of the present invention will be apparent from the descriptions in connection with following drawings.
1'~ ~ :-Fig. 1A shows a systematic diagram for a conventional frequency dividing net-work system, LC network system, Fig. 1B shows a systematic diagram for another conventional frequency dividing network system, multi-channel amplifier system, and ~ Fig. 2 shows a systematic diagram for a preferred i~ embodiment of the invention, an example of frequency ~
;~, dividing network especially for a 3-way speaker system. ~-Backaround of the inventiQn In general, multi-way audio (or speaker) system means a system which divides outputs of a sound source into several sound bands, and use multiple speaker units corresponding to the said souncl bands. And the device which divides sound ''~'` l33~2a~
bands and allocates them to a relevant speaker unit as above is called "dividing network (or circuit) .
Conventional systems which have been generally used for the dividing network are two types, namely LC network system and multi-channel amplifier system.
FIG.1A shows the above LC network system in which sound signals generated from a sound source, controlled by pre-amplifier PA and amplified by main-amplifier MA are supplied to a LC network LC. The LC network LC
compriing coils and capacitors divides the said sound signals into multiple bands (3 bands in the drawtng) according to their frequencies, and selectively feeds them to the corresponding speaker unit SP1, SP2 or SP3 to be reproduced.
LC network system as described above filters frequencies by use of the characteristic of coil and capacitor the impedanc~ of which vary with frequencies of input signals. But impedances of connected speaker units also greatly vary with frequencies of input signals, and the .
crossover frequencles and~or the slope characteristics of them vary accordingly, and thus the tone quality of the -~
audio system may deteriorats. Furthermore, there arise another problems that a fall of the damping for the low sound, and unstabilily of mid and high sound characteristics -. ~ - -due to the register of the device such as coil.
FIG. 1B shows a multi-channel amplifier system in which -~ : :,, sound signals from a sound source is controlled by pre- ~ ~
, . , ` ~ ;.~, .
;: ``' ~,,, ~ ; 33~
amplifier PA and feeds to a channel divider CD. The channel divider CD divides the said sound signals into multiPl~ bands (3 bands in the drawhg~ according to their frequencies, and divided signals are amplified by one of multiple amplifiers MAl, MA2 or MA3, selectively, and ~ed to corresPondins speaker SP1, SP2 or SP3 to be reproducedu This type of dividing network does not yield the problem of deterioration of the tone qual1ty, or intermodulation as bandwidth of the input audio signal fed to main amplifiers is narrowed, and significantly reduces distortion in the case of large volume reproduction as it can produce sufficient output due to multiple main amplifiers.
~;Though the mu~ti-channel amplifier system can produce a sound of superior tone quality, the cost of this system is very high due to the installation of as many amplifiers as the number of sound way, and controlling of crossover frequencies and ballancing of sound level of each spaaker unit are very difficult.
..
.- . .. :, ~ummarv of invention Accordingly, the object of the present invention is to . -provide a frequency dividing network ~or a multi-way audio - `-syst~m which can divide output signals from sound source of an audio system according to their frequsncy bands using a --~
digital technique, and selectively drive a corresponding :: :
i~
~-~ 4 ~ 3 ~
speaker unit among multiple speaker un;ts to reproduce khe output signals from the sound source.
To accomplish the above object, frequency dividing network in accondance with the present invention which is used for a multi-way audio system having a sound source wh1ch generates sound signals, a pre-amplifier which selects and controlls the said sound signals from the sound source, a main amplifier which ampl;fies the output signals from the said pre-amplifier, multiple speaker units which have relevant frequency bands, comprises;
a converting means for converting the analog signal outputs of the said main amplifier into digital signals:
a dividing means for dividing the converted digital signals according to their corresponding frequency bands;
a delaying means for delaying the sound signal outputs from the said main amplifier; and a switching means for selectively driving one of multiple speaker units respectively corresponding to the divided signal bands by selecting said main amplifier output signals from said delaying means according to the divided output signal from said dividing means.
Detailed descriction of the_invention ~
A frequency dividing network shown in Fig.2 is provided , with a pre-amplifier 10 which selects and controlls the ~' ~
,;
`3 ~:
``I .
~L~3~20~
sound signals supplied from a sound source (tuner or record player, tape deck, compact disc player and the 1ike), a main amplifier 20 which amplifies the output signals from the said pre-amplifier 20 to the predetermined level, and three speaker units 80, each of which is generally called woofer 80A, squawker 80B, tweeter 80C, respectlvely corre~ponding to loW, mid and high sound.
For converting the analog signal outputs from the main amplifier 10, A/D converter 30 is provided and connected to the main amplifier 1Q for dividing the above digitized signals into respective seperated frequency bands, a frequency dividing unit 50 ;s provided and a clock pulse generator 40 is provided for feeding referenGe pulses to the frequency diving unit 50.
The frequency dividing unit 50 is composed of the 1st, 2nd,3rd counter 50A,50B,50C which divide the digital signal outputs from the A~D converter 30 according to their frequencies. The 1st counter 50A is operated when the .~
output frequency of the A/~ converter 30 corresponds to a low sound band(for example, below 1~ ); the 2nd counter 50B
is operated when the output frequency of the A/D converter corresponds to a mid fraquency sound band(for example,l~ -5~ ); and the 3rd counter 50C is operated when the output frequency of the A/D converter corresponds to a hi~h sound band(for example, above 5~ ).
~ .
6 1~3~2~ :
The clock pulse gsnerator 40 is constikuted to provide a clock pulse to each counter 50A,50B,SOC so that the said counters 50A,50B,50C can be synchronized dur;ng frequency counting of input signals.
The sound signal outputs from the main amplif;er 20 feed to the ~elaying means ~0 wh~ch de1ays the above signals by d;fferent delay times, sa;d delay;ng means ts composed of the 1st, 2nd, 3rd dalaying units 60A,60B,60C, each of which corresponds to the counters ~OA, 50B, 50C, respactively.
A switch;ng unit 70 is provided for select;ng the sound signals delayed by the above delaying units 60A, 60B, 60C according to the output signals of the counters 50A, 50B, 50G, and subsquently driving one of several speaker units 80A, 80B, 80C. The switch~ng un;t ;s composed of tha 1st,2nd,3rd sw;tches 70A, 70B, 70C.
The sa;d delaying units 60A, 60B, 60C are used to compensate the transmission delay of sound signals caused by the time raqu;red for A/D convers;on and frequency count;ng, and switching. Therefore, delay time of each delay units 60A, 60B, 60C corresponds to the sum of the time required for converting the anAlog output signal from the main amplifier 20 to digital signal at the A/D converter 30; the time required for countin~ the frequency of digital signal ..
at the counters 50A, 50B, 50C; and the time for turning ON' switches 70A or 70B or 70C according to the "High signal from one of the counters 50A, 50B, 50C.
~ ~ :
7 ~L33a20~
For the purpose of preventing unnecessary counting of counters, it is preferable to be providsd with a filterlng means to cut off vsry h1gh frequency signals (far example over 20 ~ ~ which are beyond human audio frequency.
Now, the operation of the frequency dividing network constituted as descr;bed above will be expla1ned in detail.
In Fig. 2, the sound signal from the sound source is selected to a relavant mode, and controlled to a preferable form to be amplifled at the pre-amplifier 10, and is fed to main amplifier 20. Then the signal is amplified by the maln amplifier 20 to a level sufficient to drive the speaker units 80A, 80B, 80C.
The signal amplified by the main amplifier 20 is applled to the delaying units 60A,60B,60C and to the A/D
converter 30. The signal output from the main amplifier 20 is an analog signal, The A~D (Analog/Digital) converter 30 converts the analog signal input into a digital signal ~or output. This digital signal is entered in the counters 50A, 50B, 50C and its frequencies are counted. Then, these counters 50A, 50B, 50C are synchronized with the clock signal generated from the clock pulse generator 40, and count the frequency of digital signal înput, namely frequency of output signal from tha main amplifier 20.
The operation of the counters 50A, 50a, 50C are as follows. The 1st counter 50A outputs a HIGH" signal in the 8 ~3~
case of counting input ~requenc;es which correspond to the low sound band, i.e., sound containing frequencies below 1k~ and a LOW signal for input ~requencies above 1~ . The 2nd counter outputs a "HIGH" signal for middle frequency sound, ;.e., sound containing frequenc;es from 1~ to 5 and a LOW signal for other frequencies. The 3rd counter outputs a HIGH signal for the high frequency, i.e., sound .: .. ..
conta;ning frequenc;es above 5~k, and a LOW signal for ;nput frequenc;es below 6~ .
Now, assume that the sound source generates a signal wh;ch corresponds to low band, for example 500~ . Then the digital signal of 500~ is suppl;ed to the counters ~OA, 50B
and 50C. The output of the 1st counter 50A becomes 'HIGH
and the outputs for other counters 50B, 50C become 'LOW".
Therefore, since the 1st switch 70A ;s turned ON, and the other sw;tches 70B, 70C are turned OFF, the output analog signal from the main amplifier~20), which passes through the . ~:
1st delay un;t 60A, is suppl;ed to the 1st speaker, the woofer 80A, and the 1QW sound is regenerated.
Likew;se, squawker ~80B ;s dr;ven to regenerate m1d sound when a signal corresponds to mid sound band is :
~enerated from sound source, and tweeter 80C is driven for :
high sound band.
Up to now, descriptions have been made for the specific example ;n which the princ;plas of the present invention is : , ~.
appl;ed to the 3-way speaker system, this ;nvention ;s also ~
' ;' ' ' , 9 ~33i~0~L
appl;cable to the 2-way or 4-way speaker system. In such cases, constitutions and operations of them are sim;lar to those of 3-way system except that the number of counters, delaying units, speaker units de~)end on the number of ways. ;~
As descr;bed above, the t`requency d;v~d;ng ne~work accord;ng to the present invention div;des frequency bands of output s;gnal from the ma;n ampl;fier by use of the A/D
~; converter and counters, not mul~iple amplif;er as mult;~
channel amplif;er systemt the system cost of ;t ;s very low~
and it ;s very easy to control and balance the system.
Moreover, it does not cause the deter10ration or instab;lity of tone qual;ty as LC network system. As a result, the present invention can prov;de an aud;o system of super;or tone quality and low cost.
Although the ;nvent;on has been descr;bed ;n its preferred embodtment with a certa;n degree of par~icularity, it should be understood that the lnvention is not limited to the spec;f;c embod;ment therof except as defined ;n the appended cla;ms.
:.
' `: :
: ":
.
:'~ , '
Claims (5)
1. A frequency dividing network for a multi-way audio system having a sound source which generates sound signals, a pre-amplifier which selects and controls the sound signals from the sound source, a main amplifier which amplifies the output signals from the pre-amplifier, and multiple speaker units having relevant frequency range, comprising:
converting means for converting analog signal outputs of the main amplifier into digital signals;
dividing means for dividing the converted digital signals according to corresponding frequency bands;
delaying means for delaying the sound signal outputs from the main amplifier; and switching means for selectively driving one of the multiple speaker units respectively corresponding to the divided signal bands by selecting said main amplifier output signals from said delaying means according to the divided output signal from said dividing means.
converting means for converting analog signal outputs of the main amplifier into digital signals;
dividing means for dividing the converted digital signals according to corresponding frequency bands;
delaying means for delaying the sound signal outputs from the main amplifier; and switching means for selectively driving one of the multiple speaker units respectively corresponding to the divided signal bands by selecting said main amplifier output signals from said delaying means according to the divided output signal from said dividing means.
2. A frequency dividing network for a multi-way audio system according to Claim 1, wherein said dividing means comprises a plurality of counters, each corresponding to different dividing ways, for counting the frequency of the digital signal and controlling said switching means when the frequency of a digital signal is within a corresponding band.
3. A frequency dividing network for a multi-way audio system according to Claim 2, further comprising a clock pulse generator for synchronizing said counters to each other by a clock pulse of prescribed interval.
4. A frequency dividing network for a multi-way audio system according to Claim 1, wherein said delaying means comprises a plurality of delaying units, each corresponding to one dividing way, having a delaying time equal to the time required for the amplified output signal from the main amplifier to pass said converting means, said dividing means, and said switching means.
5. A frequency dividing network for a multi-way audio system according to Claim 1, wherein said switching means comprises a plurality of switches, each corresponding to one dividing way, for selecting a corresponding output signal from the main amplifier through said delaying means, and selectively driving one speaker unit in response to the output signal of said counters.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR89-6335 | 1989-05-11 | ||
| KR1019890006335A KR900019347A (en) | 1989-05-11 | 1989-05-11 | Bass, mid, and treble separation circuits for sound equipment using digital circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1330201C true CA1330201C (en) | 1994-06-14 |
Family
ID=19286117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000608506A Expired - Fee Related CA1330201C (en) | 1989-05-11 | 1989-08-16 | Frequency dividing network for a multi-way speaker system |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR900019347A (en) |
| CA (1) | CA1330201C (en) |
| DE (1) | DE3928122A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013112039A1 (en) * | 2012-01-27 | 2013-08-01 | Munoz Palafox Carlos Fernando | Playback system for electric guitar, with high-fidelity sound and microcontroller-assisted protection means |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005042431A1 (en) * | 2005-04-27 | 2006-11-09 | Ewald Kienle | Speaker arrangement for the emission of sound waves |
| DE102018122440B4 (en) * | 2018-09-13 | 2024-01-04 | Sennheiser Electronic Gmbh & Co. Kg | Control unit for audio system with subwoofer and phase correction method |
-
1989
- 1989-05-11 KR KR1019890006335A patent/KR900019347A/en not_active Abandoned
- 1989-08-16 CA CA000608506A patent/CA1330201C/en not_active Expired - Fee Related
- 1989-08-25 DE DE3928122A patent/DE3928122A1/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013112039A1 (en) * | 2012-01-27 | 2013-08-01 | Munoz Palafox Carlos Fernando | Playback system for electric guitar, with high-fidelity sound and microcontroller-assisted protection means |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3928122A1 (en) | 1990-11-15 |
| DE3928122C2 (en) | 1991-02-21 |
| KR900019347A (en) | 1990-12-24 |
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