JPH0564274A - System for distributing synchronizing signal - Google Patents
System for distributing synchronizing signalInfo
- Publication number
- JPH0564274A JPH0564274A JP3246557A JP24655791A JPH0564274A JP H0564274 A JPH0564274 A JP H0564274A JP 3246557 A JP3246557 A JP 3246557A JP 24655791 A JP24655791 A JP 24655791A JP H0564274 A JPH0564274 A JP H0564274A
- Authority
- JP
- Japan
- Prior art keywords
- division switch
- synchronization signal
- signal
- synchronizing signal
- trunks
- 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.)
- Granted
Links
Landscapes
- Time-Division Multiplex Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は時分割交換機内での同期
信号の分配方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronizing signal distribution system in a time division exchange.
【0002】[0002]
【従来の技術】従来の時分割交換機内での信号分配方式
として、各種のトーン源を必要なチャネルに供給するた
めのトーン源接続方式と各種アナウンスメントを必要な
チャネルに供給するためのアナウンスメント接続方式の
2つの代表的な信号分配方式が用いられており、この2
つの方式について図面を参照して説明する。2. Description of the Related Art As a signal distribution system in a conventional time division switch, a tone source connection system for supplying various tone sources to a required channel and an announcement for supplying various announcements to a required channel. Two typical signal distribution methods of connection are used.
Two methods will be described with reference to the drawings.
【0003】前者のトーン源接続方式は図3に示すよう
に、現用系と待機系で二重化構成された時分割スイッチ
31と、二重化構成された時分割スイッチ31の制御部
32と、二重化構成されたトーン源装置33と、一重化
構成の通話トランク34、35とから構成され、時分割
スイッチ31と制御部32の間および時分割スイッチ3
1とトーン源装置33の間には交路が存在し、通話トラ
ンク34、35は時分割スイッチ31の現用系とのみ接
続されている。トーン源スイッチ33の現用系からのト
ーン信号は、時分割スイッチ31の現用系のなかでマル
チ接続され通話トランク34、35に供給される。この
方式の重要な点はトーン源装置33が二重化されている
ことで、制御部32は時分割スイッチ31を介してトー
ン源スイッチ33の現用系からの障害報告を受けるとト
ーン源スイッチ33のみ現用系と待機系を切り替えて使
用する。As shown in FIG. 3, the former tone source connection system is composed of a time-division switch 31 having a dual structure of an active system and a standby system, a control unit 32 of the time-division switch 31 having a dual structure, and a duplex structure. The tone source device 33 and the call trunks 34 and 35 having a single configuration, and are provided between the time division switch 31 and the control section 32 and the time division switch 3.
An intersection exists between 1 and the tone source device 33, and the call trunks 34 and 35 are connected only to the active system of the time divisional switch 31. The tone signal from the active system of the tone source switch 33 is multi-connected in the active system of the time divisional switch 31 and supplied to the call trunks 34 and 35. The important point of this system is that the tone source device 33 is duplicated, and when the control unit 32 receives a failure report from the active system of the tone source switch 33 via the time division switch 31, only the tone source switch 33 is activated. Switch and use the standby system.
【0004】次に後者のアナウンスメント接続方式は図
4に示すように、二重化構成された時分割スイッチ41
と、二重化構成された時分割スイッチの制御部42と、
一重化構成のアナウンスメント・トランク43、44
と、同じく一重化構成の通話トランク45、46とから
構成され、時分割スイッチ41および制御部42は前述
のトーン源接続方式で説明した時分割スイッチ31およ
び制御部32と同一であり、アナウンスメント・トラン
ク43、44および通話トランク45、46は時分割ス
イッチ41の現用系とのみ接続される。Next, in the latter announcement connection system, as shown in FIG. 4, a time division switch 41 having a duplex configuration is used.
And a control unit 42 of the time-division switch configured as a duplex,
Announcement trunks 43, 44 with a single configuration
And the call trunks 45 and 46 of the same configuration, the time divisional switch 41 and the control unit 42 are the same as the time divisional switch 31 and the control unit 32 described in the tone source connection method, and the announcement is made. The trunks 43 and 44 and the call trunks 45 and 46 are connected only to the active system of the time divisional switch 41.
【0005】アナウンスメント・トランク43、44は
同一のアナウンスメント内容で、今アナウンスメント・
トランク43を現用系、アナウンスメント・トランク4
4を待機系とすると、アナウンスメント・トランク43
のアナウンスメントは時分割スイッチ41の現用系の中
でマルチ接続され通話トランク45、46に供給され
る。この方式の重要な点はアナウンスメント・トランク
43、44が一重化構成されていることで、制御部42
は時分割スイッチ41を介してアナウンスメント・トラ
ンク43の障害報告を受けると制御部42はアナウンス
メント・トランク43を閉塞してアナウンスメント・ト
ランク44を使用する。The announcement trunks 43 and 44 have the same announcement content, and
Trunk 43 is the current system, announcement trunk 4
4 is a standby system, the announcement trunk 43
The announcement of the above is multi-connected in the active system of the time division switch 41 and supplied to the call trunks 45 and 46. The important point of this system is that the announcement trunks 43 and 44 are configured as a single unit,
Upon receipt of a failure report of the announcement trunk 43 via the time division switch 41, the control unit 42 closes the announcement trunk 43 and uses the announcement trunk 44.
【0006】[0006]
【発明が解決しようとする課題】従来の交換機内での信
号分配方式を用いて同期信号を分配する場合、トーン源
接続方式、アナウンスメント接続方式の双方とも現用系
と待機系の切り替え処理は制御部による時分割スイッチ
の制御のもとに行われるため、現用系における障害の発
生から復旧までの時間が同期信号の周期が小さい程問題
となる。また、従来の装置構成では現用系と待機系の間
での位相周期を考慮していないため、同期信号の分配と
いう点では現用系と待機系の切り替えによって位相ズレ
が発生するという問題があった。When a synchronizing signal is distributed by using the conventional signal distribution system in the exchange, both the tone source connection system and the announcement connection system control the switching process between the active system and the standby system. Since it is performed under the control of the time division switch by the unit, the time from the occurrence of a failure in the active system to the restoration becomes more problematic as the cycle of the synchronization signal becomes shorter. Further, since the conventional apparatus configuration does not consider the phase period between the active system and the standby system, there is a problem that phase shift occurs due to switching of the active system and the standby system in terms of distribution of the synchronization signal. ..
【0007】[0007]
【課題を解決するための手段】本発明は、現用系と待機
系により二重化構成された時分割スイッチを介して時分
割交換機内で作成した同期信号を分配する同期信号分配
方式において、時分割スイッチの現用系と接続され、入
力した同期信号に位相同期した信号を作成するかまたは
独立して同期信号を作成し位相調整を行ってから時分割
スイッチに出力する複数の同期信号作成手段と、時分割
スイッチから入力される各同期信号作成手段で作成され
た複数の同期信号の1つを選択して時分割スイッチに出
力する複数の同期信号選択手段と、各同期信号作成手段
および各同期信号分配手段からの障害通知に従って両手
段の入出力の組み合わせを設定して前記時分割スイッチ
内での同期信号の接続路を制御するとともに同期信号の
選択を制御する制御手段とから構成するようにしたもの
である。DISCLOSURE OF THE INVENTION The present invention is a time-division switch for distributing a synchronization signal created in a time-division switch through a time-division switch composed of a dual system consisting of an active system and a standby system. , Which is connected to the current system and creates a signal that is phase-synchronized with the input synchronization signal or that creates a synchronization signal independently and performs phase adjustment before outputting it to the time-division switch. A plurality of synchronizing signal selecting means for selecting one of a plurality of synchronizing signals created by each synchronizing signal creating means inputted from the division switch and outputting it to the time division switch, each synchronizing signal creating means and each synchronizing signal distribution According to the failure notification from the means, the combination of the input and output of both means is set to control the connection path of the synchronization signal in the time division switch and to control the selection of the synchronization signal. It is obtained so as to constitute and means.
【0008】[0008]
【作用】本発明によれば、複数の同期信号作成手段およ
び複数の同期信号分配手段からの障害通知に従う制御部
の制御により、は時分割スイッチ内での同期信号路の接
続路が設定され、同期信号分配手段での同期信号の選択
が行われる。According to the present invention, by the control of the control unit according to the failure notification from the plurality of synchronization signal generation means and the plurality of synchronization signal distribution means, the connection path of the synchronization signal path in the time division switch is set, The synchronization signal is selected by the synchronization signal distribution means.
【0009】[0009]
【実施例】次に本発明について図面を参照して説明す
る。図1は本発明に係る同期信号分配方式に一実施例を
示すブロック図である。時分割スイッチ1と制御部2と
折り返し装置8はそれぞれ二重化構成され、時分割スイ
ッチ1と折り返し装置8の間および時分割スイッチ1と
制御部2の間は交路をもって接続される。同期信号作成
トランク4、5と同期信号選択トランク6、7と通話ト
ランク3、9、10、11は一重化構成で時分割スイッ
チ1の現用系と接続される。同期信号系構成制御装置1
2と保守運用端末13も一重化構成で制御部2の現用系
と接続される。同期信号作成トランク4、5および同期
信号選択トランク6、7と同期信号系構成制御装置12
の間は、障害通知信号aと系制御信号bとが相互に入出
力するように構成される。401、501は同期信号作
成トランク4、5にそれぞれ備えられた位相調整器であ
る。The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a synchronizing signal distribution system according to the present invention. The time divisional switch 1, the control unit 2 and the loopback device 8 are duplicated respectively, and the time divisional switch 1 and the loopback device 8 and the time divisional switch 1 and the control unit 2 are connected with a cross path. The sync signal generating trunks 4 and 5, the sync signal selecting trunks 6 and 7, and the call trunks 3, 9, 10 and 11 are connected to the active system of the time division switch 1 in a single configuration. Synchronous signal system configuration control device 1
2 and the maintenance operation terminal 13 are also connected to the active system of the control unit 2 in a single configuration. Sync signal generation trunks 4 and 5, sync signal selection trunks 6 and 7, and sync signal system configuration control device 12
During this period, the fault notification signal a and the system control signal b are configured to be input and output mutually. Reference numerals 401 and 501 are phase adjusters provided in the synchronization signal generating trunks 4 and 5, respectively.
【0010】図1は他局からの同期信号を時分割スイッ
チ1を介して受信し、通話トランク9、10、11を介
して分配する場合の同期信号の流れを示しており、この
同期信号の流れについて説明する。同期信号は他局より
通話トランク3を介して時分割スイッチ1に入力され、
時分割スイッチ1内でのマルチ接続によって同期信号作
成トランク4、5に入力される。同期信号作成トランク
4、5は入力した信号に位相同期した信号を制御部2に
出力するが、この場合の位相調整器401、501は機
能せず入力した信号を同期信号としてそのまま出力す
る。時分割スイッチ1の中のマルチ接続により同期信号
作成トランク4、5の出力が同期信号選択トランク6、
7の双方に別々に入力する。FIG. 1 shows the flow of a synchronization signal when a synchronization signal from another station is received via the time division switch 1 and distributed via the call trunks 9, 10 and 11. The flow will be described. The synchronization signal is input to the time division switch 1 from another station via the call trunk 3,
The signals are input to the synchronization signal generating trunks 4 and 5 by the multi-connection in the time division switch 1. Although the synchronization signal generating trunks 4 and 5 output a signal phase-synchronized with the input signal to the control unit 2, the phase adjusters 401 and 501 in this case do not function and output the input signal as it is as a synchronization signal. By the multi-connection in the time divisional switch 1, the output of the sync signal generating trunks 4, 5 is the sync signal selecting trunk 6,
Input separately for both 7.
【0011】同期信号選択トランク6、7は同期信号系
構成制御装置12の指示に従って同期信号作成トランク
4、5の入力の一方を選択し時分割スイッチ1に出力す
る。ここでは同期信号系構成制御装置12が同期信号選
択トランク6を現用系として選択しているとすると、同
期信号選択トランク6の出力は時分割スイッチ1内の接
続によって折り返し装置8に接続され、同期信号選択ト
ランク7の出力は時分割スイッチ1の中で未接続にされ
る。The synchronization signal selection trunks 6 and 7 select one of the inputs of the synchronization signal preparation trunks 4 and 5 according to an instruction from the synchronization signal system configuration control device 12 and output it to the time division switch 1. Here, assuming that the synchronization signal system configuration control device 12 selects the synchronization signal selection trunk 6 as the active system, the output of the synchronization signal selection trunk 6 is connected to the loopback device 8 by the connection in the time division switch 1, The output of the signal selection trunk 7 is left unconnected in the time division switch 1.
【0012】折り返し装置8は同期信号選択トランク6
からの入力をそのまま折り返し、時分割スイッチ1の中
の別の端子へ出力し、折り返し装置8の出力は時分割ス
イッチ1の中のマルチ接続により通話トランク9、1
0、11に同位相で分配される。今、同期信号作成トラ
ンク4と同期信号選択トランク6を現用系として同期信
号作成トランク4に障害が発生したとすると、同期信号
作成トランク4は同期信号系構成制御装置12へ信号a
で障害を通知し、同期信号系構成制御装置12は同期信
号選択トランク6、7に対して信号bで入力を同期信号
作成トランク4から同期信号作成トランク5へ切り替え
るように指示を出し、制御結果を制御部2を介して保守
運用端末13に出力する。The folding device 8 is a synchronization signal selection trunk 6
The input from is returned as it is and output to another terminal in the time division switch 1, and the output of the return device 8 is the call trunks 9 and 1 by the multi-connection in the time division switch 1.
0 and 11 are distributed in the same phase. Now, assuming that a failure occurs in the sync signal creation trunk 4 with the sync signal creation trunk 4 and the sync signal selection trunk 6 as the active system, the sync signal creation trunk 4 sends a signal a to the sync signal system configuration controller 12.
Then, the synchronization signal system configuration control device 12 instructs the synchronization signal selection trunks 6 and 7 to switch the input from the synchronization signal preparation trunk 4 to the synchronization signal preparation trunk 5 by the signal b, and the control result Is output to the maintenance operation terminal 13 via the control unit 2.
【0013】ここでさらに同期信号作成トランク6に障
害が発生したとすると、同期信号作成トランク6は同期
信号系構成制御装置12へ信号aで障害を通知し、同期
信号系構成制御装置12は制御部2を介して時分割スイ
ッチ1の中の同期信号作成トランク6と折り返し装置8
の接続を同期信号作成トランク7と折り返し装置8の接
続に変更させ、制御部2が制御結果を保守運用端末13
に出力する。If a failure occurs in the sync signal creation trunk 6 here, the sync signal creation trunk 6 notifies the sync signal system configuration controller 12 of the failure by the signal a, and the sync signal system configuration controller 12 controls. The synchronization signal generating trunk 6 and the loopback device 8 in the time divisional switch 1 through the section 2.
Is changed to the connection of the synchronization signal creation trunk 7 and the loopback device 8, and the control unit 2 displays the control result to the maintenance operation terminal 13
Output to.
【0014】図2は自局が親となって通話トランク9、
10、11に同期信号を分配する場合のブロック図を同
期信号の流れとともに示したものである。図1との相違
点は位相調整器401、501が機能する点と、同期信
号作成トランク4が運用系の場合は同期信号作成トラン
ク4の出力が同期信号作成トランク5の入力となって同
期信号作成トランク4の入力は無入力となり、かつ同期
信号作成トランク5が運用系の場合は同期信号作成トラ
ンク5の出力が同期信号作成トランク4の入力となって
同期信号作成トランク5の入力は無入力となるように時
分割スイッチ1の中が接続され、同期信号作成トランク
4、5のうち現用系になった方が親となりかつ待機系と
なった方は従属同期する点にある。FIG. 2 shows that the local station becomes a parent and the call trunk 9
FIG. 3 is a block diagram showing the flow of the sync signal when the sync signal is distributed to 10 and 11. FIG. The difference from FIG. 1 is that the phase adjusters 401 and 501 function, and when the synchronization signal preparation trunk 4 is an active system, the output of the synchronization signal preparation trunk 4 becomes an input of the synchronization signal preparation trunk 5 The input of the preparation trunk 4 is no input, and when the synchronization signal preparation trunk 5 is the operation system, the output of the synchronization signal preparation trunk 5 becomes the input of the synchronization signal preparation trunk 4 and the input of the synchronization signal preparation trunk 5 is not input. The time-division switch 1 is connected so that the one that becomes the active system of the synchronization signal generating trunks 4 and 5 becomes the parent and the one that becomes the standby system is in the point of subordinate synchronization.
【0015】特に位相調整器401、501の動作を位
相調整器401を例にとって説明すると、同期信号作成
トランク4が現用系の場合は出力信号を位相調整せずそ
のまま時分割スイッチ1に出力し、同期信号作成トラン
ク4が待機系の場合は出力信号を同期信号作成トランク
5の出力信号と位相が同期するように位相を進めて時分
割スイッチ1に出力する。これによって同期信号系構成
制御装置12からの信号bによる同期信号作成トランク
4、5間の系切り替え制御が行われても、系切り替えに
伴う同期信号の位相ズレの発生が防止される。In particular, the operation of the phase adjusters 401 and 501 will be described by taking the phase adjuster 401 as an example. When the synchronization signal preparation trunk 4 is the active system, the output signal is directly output to the time division switch 1 without phase adjustment. When the synchronization signal generating trunk 4 is a standby system, the output signal is advanced in phase so as to be in phase with the output signal of the synchronization signal generating trunk 5 and output to the time division switch 1. As a result, even if the system switching control between the synchronization signal generating trunks 4 and 5 is performed by the signal b from the synchronization signal system configuration control device 12, the phase shift of the synchronization signal due to the system switching is prevented.
【0016】また、図1、図2において折り返し装置8
を設けることにより、同期信号選択トランク6、7の間
に系切り替え時に時分割スイッチ1の中の接続を同期信
号選択トランク6、7と通話トランク9、10、11の
間の接続から同期信号選択トランク6と折り返し装置8
または同期信号選択トランク7と折り返し装置8の接続
の変更を制御部2が時分割スイッチ1に対して指示する
だけで済むように時分割スイッチ1の中での処理の高速
化をはかっている。Further, in FIGS. 1 and 2, the folding device 8 is provided.
By providing the connection between the synchronization signal selection trunks 6 and 7, the connection in the time division switch 1 is selected from the connection between the synchronization signal selection trunks 6 and 7 and the communication trunks 9, 10 and 11 when the system is switched. Trunk 6 and folding device 8
Alternatively, the processing in the time-division switch 1 is speeded up so that the control unit 2 only has to instruct the time-division switch 1 to change the connection between the synchronization signal selection trunk 7 and the loopback device 8.
【0017】[0017]
【発明の効果】以上説明したように本発明は、時分割交
換機において同期信号作成機能を一重化構成の装置とし
て複数容易し、作成した同期信号の中から1つを選択す
る機能を一重化構成の装置として複数用意して双方とも
時分割スイッチに接続し、これらの装置の入出力の組合
せを制御する専用の制御装置を設けることによって、系
構成制御によって生じる同期信号の瞬断時間を最小限に
できるという効果があり、自局が同期信号に関して親で
ある場合は系切り替えに伴う同期信号の位相ズレが発生
しなくなるという効果がある。また、同期信号作成機能
と選択機能を一重化装置として分けたため二重化以外に
自由度の高い冗長構成も可能となり保守しやすくなると
いう効果も有する。As described above, the present invention facilitates a plurality of synchronization signal generating functions in a time-division switch as a device having a single configuration, and provides a single configuration for selecting one of the created synchronization signals. By preparing a plurality of devices for both of them and connecting them to the time division switch and providing a dedicated control device for controlling the input / output combination of these devices, the instantaneous interruption time of the synchronization signal caused by the system configuration control is minimized. When the local station is the parent regarding the synchronization signal, there is an effect that the phase shift of the synchronization signal due to system switching does not occur. Further, since the synchronizing signal generating function and the selecting function are separated as a single device, there is an effect that a redundant configuration having a high degree of freedom is possible in addition to the duplication and maintenance is facilitated.
【図1】本発明に係る同期信号分配方式の一実施例を示
すブロック図である。FIG. 1 is a block diagram showing an embodiment of a synchronization signal distribution system according to the present invention.
【図2】図1の応用例を示すブロック図である。FIG. 2 is a block diagram showing an application example of FIG.
【図3】従来の信号分配方式のブロック図である。FIG. 3 is a block diagram of a conventional signal distribution system.
【図4】従来の信号分配方式のブロック図である。FIG. 4 is a block diagram of a conventional signal distribution system.
1 時分割スイッチ 2 制御部 3、9、10、11 通話トランク 4、5 同期信号作成トランク 6、7 同期信号分配トランク 8 折り返し装置 12 同期信号系構成制御装置 13 保守運用端末 1 Time Division Switch 2 Control Units 3, 9, 10, 11 Call Trunk 4, 5 Sync Signal Creation Trunk 6, 7 Sync Signal Distribution Trunk 8 Folding Device 12 Sync Signal System Configuration Control Device 13 Maintenance Operation Terminal
Claims (1)
時分割スイッチを介して時分割交換機内で作成した同期
信号を分配する同期信号分配方式において、前記時分割
スイッチの現用系と接続され、入力した同期信号に位相
同期した信号を作成するかまたは独立して同期信号を作
成し位相調整を行ってから前記時分割スイッチに出力す
る複数の同期信号作成手段と、前記時分割スイッチから
入力される前記各同期信号作成手段で作成された複数の
同期信号の1つを選択して前記時分割スイッチに出力す
る複数の同期信号選択手段と、前記各同期信号作成手段
および前記各同期信号分配手段からの障害通知に従って
前記両手段の入出力の組み合わせを設定して前記時分割
スイッチ内での同期信号の接続路を制御するとともに前
記同期信号の選択を制御する制御手段とから構成したこ
とを特徴とする同期信号分配方式。1. A synchronous signal distribution system for distributing a synchronous signal created in a time-division switch through a time-division switch composed of a dual system consisting of an active system and a standby system, which is connected to an active system of the time-division switch, A plurality of synchronizing signal generating means for generating a signal that is phase-synchronized with the input synchronizing signal or for independently generating a synchronizing signal and performing phase adjustment and then outputting to the time division switch, and the input from the time division switch. A plurality of synchronization signal selecting means for selecting one of the plurality of synchronization signals generated by the respective synchronization signal generating means and outputting it to the time division switch, the synchronization signal generating means and the synchronization signal distributing means. According to the failure notification from the above, the combination of the input and output of the both means is set to control the connection path of the synchronization signal in the time division switch and select the synchronization signal. A synchronizing signal distribution system characterized by comprising a control means for controlling.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3246557A JP2897482B2 (en) | 1991-09-02 | 1991-09-02 | Synchronous signal distribution method |
US08/445,002 US5592474A (en) | 1991-09-02 | 1995-05-19 | System for processing synchronization signals with phase synchronization in a mobile communication network |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3246557A JP2897482B2 (en) | 1991-09-02 | 1991-09-02 | Synchronous signal distribution method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0564274A true JPH0564274A (en) | 1993-03-12 |
JP2897482B2 JP2897482B2 (en) | 1999-05-31 |
Family
ID=17150190
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3246557A Expired - Lifetime JP2897482B2 (en) | 1991-09-02 | 1991-09-02 | Synchronous signal distribution method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2897482B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020040027A (en) * | 2000-11-23 | 2002-05-30 | 구자홍 | Clock distribution method for time sharing switch |
KR100523356B1 (en) * | 2002-11-22 | 2005-10-24 | 한국전자통신연구원 | A Clock Synchronization Apparatus with a Time Division |
US9306017B2 (en) | 2009-12-03 | 2016-04-05 | Epcos Ag | Bipolar transistor with lateral emitter and collector and method of production |
-
1991
- 1991-09-02 JP JP3246557A patent/JP2897482B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020040027A (en) * | 2000-11-23 | 2002-05-30 | 구자홍 | Clock distribution method for time sharing switch |
KR100523356B1 (en) * | 2002-11-22 | 2005-10-24 | 한국전자통신연구원 | A Clock Synchronization Apparatus with a Time Division |
US9306017B2 (en) | 2009-12-03 | 2016-04-05 | Epcos Ag | Bipolar transistor with lateral emitter and collector and method of production |
Also Published As
Publication number | Publication date |
---|---|
JP2897482B2 (en) | 1999-05-31 |
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