JPH0213988B2 - - Google Patents

Info

Publication number
JPH0213988B2
JPH0213988B2 JP59006550A JP655084A JPH0213988B2 JP H0213988 B2 JPH0213988 B2 JP H0213988B2 JP 59006550 A JP59006550 A JP 59006550A JP 655084 A JP655084 A JP 655084A JP H0213988 B2 JPH0213988 B2 JP H0213988B2
Authority
JP
Japan
Prior art keywords
voltage
circuit
battery
switch
constant voltage
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
Application number
JP59006550A
Other languages
Japanese (ja)
Other versions
JPS60150364A (en
Inventor
Minoru Yamanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59006550A priority Critical patent/JPS60150364A/en
Publication of JPS60150364A publication Critical patent/JPS60150364A/en
Publication of JPH0213988B2 publication Critical patent/JPH0213988B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/71Substation extension arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は集積回路化された回路網を持つ電話装
置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a telephone device having an integrated circuit network.

従来例の構成とその問題点 第1図は従来の通話路を集積回路(IC)化し
た電話装置を示している。以下にこの従来例の構
成について第1図とともに説明する。
Conventional configuration and its problems FIG. 1 shows a telephone device in which a conventional communication path is integrated into an integrated circuit (IC). The configuration of this conventional example will be explained below with reference to FIG. 1.

第1図において、1は電話装置であり、2の回
路網はIC化されている。3はフツクスイツチで、
送受器をあげると回路網はダイオードブリツジ
4、フツクスイツチ3、ケーブル5を介して電話
局6に接続され、電圧、電流が供給される。電話
局6より供給された電圧は回路網2の内部で定電
圧電源7により約2Vの定電圧になり、受話アン
プ8、送話アンプ9を駆動することにより受話器
10、送話器11を介して通話が行なわれる。な
お12は抵抗、コンデンサよりなる防側音回路で
ある。
In FIG. 1, 1 is a telephone device, and the circuit network 2 is integrated circuit. 3 is a switch,
When the handset is lifted, the circuit network is connected via a diode bridge 4, a switch 3, and a cable 5 to a central office 6, which supplies voltage and current. The voltage supplied from the telephone office 6 is turned into a constant voltage of about 2V by the constant voltage power supply 7 inside the circuit network 2, and is then transmitted through the receiver 10 and the transmitter 11 by driving the receiver amplifier 8 and the transmitter amplifier 9. The call is then made. Note that 12 is a side sound prevention circuit consisting of a resistor and a capacitor.

第2図は第1図の定電圧電源7の原理図であ
り、13,14は電圧入力端子で、定電流源15
により交流的にハイインピーダンス特性を持た
せ、定電圧回路16で余分な電流をバイパスさせ
ることにより17の端子より2Vの定電圧を各ア
ンプへ供給している。なお18はリツプル防止用
のコンデンサである。
FIG. 2 is a principle diagram of the constant voltage power supply 7 shown in FIG.
By providing a high impedance characteristic in the alternating current, and by bypassing excess current in the constant voltage circuit 16, a constant voltage of 2V is supplied from the terminal 17 to each amplifier. Note that 18 is a ripple prevention capacitor.

次に上記従来例の動作について説明する。第1
図において、通話中ダイオードブリツジ4の出力
電圧は通常3V〜10Vあるため、定電圧回路7は
正常動作を行ない、アンプ8,9には2Vの電圧
が印加され電話機として正常動作する。
Next, the operation of the above conventional example will be explained. 1st
In the figure, since the output voltage of the diode bridge 4 during a call is normally 3V to 10V, the constant voltage circuit 7 operates normally, and a voltage of 2V is applied to the amplifiers 8 and 9, so that the telephone operates normally.

しかしながら上記従来例では、親子電話等で2
台以上の電話機が並列に接続され、2台以上が同
時に通話状態になると、電流が分流して電話機の
印加電圧が半減する。この時、加入者が電話局よ
り遠い場合にはICに印加される電圧はダイオー
ドブリツジ9によるロスにより0.6V〜2V位まで
下るため、定電圧電源7が動作できなくなり、ア
ンプ8,9が動作を停止し通話ができなくなると
いう欠点があつた。
However, in the above conventional example, 2
When two or more telephones are connected in parallel and two or more telephones are in a talking state at the same time, the current is divided and the voltage applied to the telephones is halved. At this time, if the subscriber is far from the telephone office, the voltage applied to the IC will drop to about 0.6V to 2V due to the loss caused by the diode bridge 9, so the constant voltage power supply 7 will not be able to operate, and the amplifiers 8 and 9 will be The drawback was that it stopped working and made it impossible to make calls.

発明の目的 本発明は上記従来例の欠点を除去するものであ
り、電話局より遠い加入者が2台以上の電話機を
並列に接続し、同時通話で局線電圧が低下した時
でも電話装置に内蔵された電池に切替えることに
より、常にアンプに定電圧(例えば2V)を供給
して正常に通話ができるようにした電話装置を提
供することを目的とする。
Purpose of the Invention The present invention is intended to eliminate the drawbacks of the above-mentioned conventional example, and allows a subscriber who is far away from a telephone office to connect two or more telephones in parallel, so that even when the central office line voltage drops due to simultaneous calls, the telephone equipment remains unchanged. It is an object of the present invention to provide a telephone device that constantly supplies a constant voltage (for example, 2V) to an amplifier by switching to a built-in battery so that normal calls can be made.

発明の構成 本発明の電話装置は、電話機の回路網を構成す
るICに、局線から供給される電圧により定電圧
を発生する定電圧回路と、上記局線から供給され
る電圧の値とバツクアツプ用の電池から供給され
る電圧の値を比較する比較回路と、上記定電圧回
路を回路網から切離す第1のスイツチ回路と、上
記バツクアツプ用の電池を回路網から切離す第2
のスイツチ回路を内蔵させ、上記局線の電圧が所
定の値以下になつた時に上記第1及び第2のスイ
ツチ回路を動作させて、上記バツクアツプ用電池
を回路網に接続すると共に上記定電圧回路を回路
網より切離すように構成したものである。
Structure of the Invention The telephone device of the present invention includes a constant voltage circuit that generates a constant voltage based on the voltage supplied from the central office line, and a voltage back-up circuit that generates a constant voltage using the voltage supplied from the central office line, in an IC constituting the circuit network of the telephone. a comparison circuit for comparing the voltage values supplied from the backup battery; a first switch circuit for disconnecting the constant voltage circuit from the circuit network; and a second switch circuit for disconnecting the backup battery from the circuit network.
A switch circuit is built in, and when the voltage of the station line falls below a predetermined value, the first and second switch circuits are operated to connect the backup battery to the circuit network and connect the voltage regulator to the constant voltage circuit. It is configured so that it is separated from the circuit network.

実施例の説明 以下に本発明の一実施例の構成について図面と
ともに説明する。
DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings.

第3図はIC内部の電源回路を示している。第
3図において、21,22は局線の接続入力端
子、23はフツクスイツチ、24はバツクアツプ
用の電池(約3V)、25,49はリツプル除去用
コンデンサ、26は通話中オン(ON)する接点
であり、本実施例ではフツクスイツチを用いてい
るが、他の回路より通話中に電圧が印加される制
御端子を用いても良い。27,28,29,3
0,31,50はICの入出力ピンである。32,
33は電流制限抵抗、34はトランジスタ、35
は電池切離し用のトランジスタで、フツクスイツ
チ26の信号により通話中のみONして電池24
を接続する。36,37は基準電圧用分圧抵抗、
38,39,40は局電圧の分圧抵抗、41は局
電圧と電池電圧の比較回路で、局電圧ば下つた時
電池電源印加用のトランジスタ43をONさせる
ための制御線42と、定電圧回路切離し用のスイ
ツチ48を制御する信号線44を制御している。
45は定電流源、46は逆流防止ダイオード、4
7は定電圧回路である。
Figure 3 shows the power supply circuit inside the IC. In Fig. 3, 21 and 22 are connection input terminals for the office line, 23 is a switch, 24 is a backup battery (approximately 3V), 25 and 49 are ripple removal capacitors, and 26 is a contact that is turned on during a call. Although a switch is used in this embodiment, a control terminal to which a voltage is applied from another circuit during a call may also be used. 27, 28, 29, 3
0, 31, and 50 are input/output pins of the IC. 32,
33 is a current limiting resistor, 34 is a transistor, 35
is a transistor for disconnecting the battery, which is turned on only during a call by the signal from the switch 26 to disconnect the battery 24.
Connect. 36 and 37 are voltage dividing resistors for reference voltage,
38, 39, and 40 are voltage dividing resistors for the local voltage; 41 is a comparison circuit for the local voltage and battery voltage; a control line 42 for turning on the transistor 43 for applying battery power when the local voltage drops; and a constant voltage It controls a signal line 44 that controls a switch 48 for disconnecting the circuit.
45 is a constant current source, 46 is a reverse current prevention diode, 4
7 is a constant voltage circuit.

次に上記実施例の動作について説明する。第3
図において、送受器を上げるとフツクスイツチ2
3を通して局線から通常3V以上の局電圧が端子
27,28を通じてICに印加される。この電圧
は抵抗38,39,40を通して分圧された電圧
が比較回路41に加えられる。これと同時にフツ
クスイツチ26がONし、電池電圧が端子30、
抵抗32を通してトランジスタ34に印加される
ため、トランジスタ34がONし、抵抗33を通
してトランジスタ35もONし、電池24から電
圧がトランジスタ35、抵抗36,37を通して
基準電圧として比較回路41に印加される。比較
回路41は基準電圧と局電圧を比較し、局電圧が
3V以上であれば制御線42によりトランジスタ
43をオフ(OFF)し、制御線44によりスイ
ツチ48をONさせ局電源により2Vの定電圧を各
アンプに供給し通話を可能とする。
Next, the operation of the above embodiment will be explained. Third
In the figure, when you raise the handset, the switch 2
A local voltage of usually 3 V or more is applied to the IC from the local line through terminal 3 through terminals 27 and 28. This voltage is divided through resistors 38, 39, and 40 and applied to a comparator circuit 41. At the same time, the switch 26 turns on, and the battery voltage changes to the terminal 30.
Since the voltage is applied to the transistor 34 through the resistor 32, the transistor 34 is turned on, the transistor 35 is also turned on through the resistor 33, and the voltage from the battery 24 is applied to the comparator circuit 41 as a reference voltage through the transistor 35 and resistors 36 and 37. The comparison circuit 41 compares the reference voltage and the local voltage, and determines whether the local voltage is
If it is 3V or more, the transistor 43 is turned off by the control line 42, the switch 48 is turned on by the control line 44, and a constant voltage of 2V is supplied to each amplifier by the local power supply, thereby enabling a telephone call.

この時、電話機の並列接続による同時通話で局
電圧が3Vより下ると抵抗38,39,40によ
り印加される電圧が下るので、比較回路41はこ
の電圧を検出して制御線42によりトランジスタ
43をONさせて電池駆動に切替えると同時に、
制御線44によりスイツチ48をOFFさせて定
電圧回路47を切離し、電池が定電圧回路によつ
て消費されることを防止する。この時、電池24
の電圧はトランジスタ35,43により降下して
約2Vの電圧となつている。また逆流防止ダイオ
ード46により電池24の電流は局線には供給さ
れない。電池24より供給される2Vの電圧によ
り各アンプは正常に動作して通話を保持する。
At this time, if the local voltage drops below 3V due to simultaneous calls made by connecting telephones in parallel, the voltage applied by the resistors 38, 39, and 40 will drop, so the comparator circuit 41 detects this voltage and connects the transistor 43 via the control line 42. At the same time as turning it on and switching to battery power,
The switch 48 is turned off via the control line 44 to disconnect the constant voltage circuit 47, thereby preventing the battery from being consumed by the constant voltage circuit. At this time, battery 24
The voltage is lowered by transistors 35 and 43 to a voltage of approximately 2V. Further, the current from the battery 24 is not supplied to the central line due to the backflow prevention diode 46. The 2V voltage supplied from the battery 24 causes each amplifier to operate normally and maintain communication.

なお、比較回路41は、局線が接続されていな
い時や輸送中等に送受器が外れフツクスイツチ2
3,26がONになつていても電池を消費しない
ようにするため、局線の印加電圧が0.6V以下の
場合にはトランジスタ43をOFFさせる機能を
持たせる必要があるが、これは電圧が0.6V以下
ではトランジスタがONできないので容易に検出
できる。
Note that the comparator circuit 41 is connected to the power switch 2 when the handset is disconnected from the central office line or during transportation.
In order to avoid consuming the battery even if 3 and 26 are on, it is necessary to have a function that turns off the transistor 43 when the voltage applied to the station line is 0.6V or less. It can be easily detected because the transistor cannot turn on below 0.6V.

またトランジスタ35で構成される電池切離し
回路は、電話機を使用しない時に抵抗36,37
に電流が流れて電池24が消耗することを防止す
るために必要である。しかしこの回路は第4図に
示した様にフツクスイツチと同様の機械接点51
が使用できる場合は不用である。
In addition, the battery disconnection circuit composed of the transistor 35 is connected to the resistors 36 and 37 when the telephone is not in use.
This is necessary to prevent the battery 24 from being depleted due to current flowing through it. However, this circuit has a mechanical contact 51 similar to a switch as shown in FIG.
Not required if available.

発明の効果 本発明は上記のような構成であり、以下に示す
効果が得られるものである。すなわち、IC化さ
れた電話回路網において、電話局より遠く電話機
に印加される電圧が低い条件の時や2台以上の電
話機による並列接続の動作時に、ICのプロセス
により制限される動作電圧を下まわつた時でも、
バツクアツプ用の電池を使用してICの動作電圧
を保持することにより通話が可能となる。
Effects of the Invention The present invention has the above-described configuration, and provides the following effects. In other words, in an IC-based telephone circuit network, when the voltage applied to telephones far from the central office is low, or when two or more telephones are connected in parallel, the operating voltage limited by the IC process can be lowered. Even when I'm lost,
Calls can be made by using a backup battery to maintain the operating voltage of the IC.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は回路網をIC化した従来の電話装置の
通話回路部の回路図、第2図は第1図の回路の定
電圧電源の原理図、第3図は本発明の一実施例に
おける電話装置の電源回路の回路図、第4図は本
発明の他の実施例の要部の回路図である。 23,26……フツクスイツチ、24……バツ
クアツプ用電池、32,33,36,37,3
8,39,40……抵抗、34,35,43……
トランジスタ、41……比較回路、45……定電
流源、46……逆流防止ダイオード、47……定
電圧回路、48……スイツチ。
Fig. 1 is a circuit diagram of the communication circuit section of a conventional telephone device in which the circuit network is integrated into an IC, Fig. 2 is a principle diagram of a constant voltage power supply of the circuit of Fig. 1, and Fig. 3 is an example of an embodiment of the present invention. FIG. 4 is a circuit diagram of a power supply circuit of a telephone device, and is a circuit diagram of a main part of another embodiment of the present invention. 23, 26... Hook switch, 24... Backup battery, 32, 33, 36, 37, 3
8, 39, 40...Resistance, 34, 35, 43...
Transistor, 41... Comparison circuit, 45... Constant current source, 46... Backflow prevention diode, 47... Constant voltage circuit, 48... Switch.

【特許請求の範囲】[Claims]

1 PCM符号のデイジタル多重演算処理を行う
ことにより複数チヤネルの会議電話接続を行うデ
イジタル会議電話装置において、1会議を構成し
ている時分割されたn個チヤネルの多重化音声入
力信号を遅延回路により遅延し、秘話サービスを
要求している会議の中のi(n>i)個の音声信
号のチヤネル位置を制御回路により選択し、(n
−i)個チヤネルの音声信号およびi個チヤネル
の音声信号を累算回路(アキユムレータ)によ
り、それぞれ独立に加え合せ、レジスタAに(n
−i)個チヤネルの音声混合信号を、レジスタB
にi個チヤネルの秘話音声混合信号を格納すると
共に、(n−i)個の音声信号のチヤネル位置と
i個の音声信号のチヤネル位置を選択回路(セレ
クタ)により、選択し、前記遅延回路より出力さ
れるn個チヤネル多重化音声入力信号を上記選択
回路によつて選択されたチヤネル位置で、レジス
タA、レジスタBのそれぞれの内容を減算回路に
1. In a digital conference phone device that connects multiple channels of conference calls by performing digital multiplexing processing of PCM codes, multiplexed audio input signals of n time-divided channels constituting one conference are processed by a delay circuit. The control circuit selects channel positions of i (n>i) audio signals in the conference that are delayed and requesting confidential service;
-i) The audio signals of i channels and the audio signals of i channels are independently added together by an accumulator and stored in register A (n
-i) The audio mixed signal of each channel is transferred to register B.
The secret speech mixed signal of i channels is stored in , and the channel positions of the (ni) audio signals and the channel positions of the i audio signals are selected by a selection circuit (selector), and the channel positions of the i audio signals are selected by the delay circuit. The outputted n-channel multiplexed audio input signal is input to the subtraction circuit by the contents of register A and register B at the channel position selected by the selection circuit.

JP59006550A 1984-01-18 1984-01-18 Telephone set Granted JPS60150364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59006550A JPS60150364A (en) 1984-01-18 1984-01-18 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59006550A JPS60150364A (en) 1984-01-18 1984-01-18 Telephone set

Publications (2)

Publication Number Publication Date
JPS60150364A JPS60150364A (en) 1985-08-08
JPH0213988B2 true JPH0213988B2 (en) 1990-04-05

Family

ID=11641435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59006550A Granted JPS60150364A (en) 1984-01-18 1984-01-18 Telephone set

Country Status (1)

Country Link
JP (1) JPS60150364A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6383853U (en) * 1986-11-20 1988-06-01
AU614454B2 (en) * 1989-02-09 1991-08-29 Alcatel Australia Limited A circuit arrangement for providing power for an ic chip in a telephone subset
JPH03208452A (en) * 1990-01-11 1991-09-11 Nippon Telegr & Teleph Corp <Ntt> Transmission reception amplifier circuit for telephone set
JP7181502B2 (en) * 2018-09-27 2022-12-01 サクサ株式会社 emergency telephone equipment

Also Published As

Publication number Publication date
JPS60150364A (en) 1985-08-08

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