JPS6256707B2 - - Google Patents
Info
- Publication number
- JPS6256707B2 JPS6256707B2 JP4314182A JP4314182A JPS6256707B2 JP S6256707 B2 JPS6256707 B2 JP S6256707B2 JP 4314182 A JP4314182 A JP 4314182A JP 4314182 A JP4314182 A JP 4314182A JP S6256707 B2 JPS6256707 B2 JP S6256707B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- terminal
- resistor
- dial
- oscillation
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 46
- 244000145845 chattering Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
Description
【発明の詳細な説明】
本発明は電話機回路、特に２周波合成信号方式
の押しボタンダイヤル電話機の電話機回路に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone circuit, and more particularly to a telephone circuit for a push-button dial telephone using a two-frequency composite signal system.
従来この種の電話機回路には第１図に示すよう
に、押しボタンダイヤルのメカニカル接点でダイ
ヤル発振回路と通話回路を切り換える方式を採用
していた。即ち第１図において１及び２はそれぞ
れ第１及び第２の線路端子、３はダイヤル発振回
路で、総ての押しボタンに共通に動作する共通接
点３０と、各押しボタンに対応して動作（メー
ク）する周波数接点３１と、発振回路３２と、出
力抵抗器３３を含み、４はダイヤル発振回路３へ
のバイアス抵抗器、５は通話回路である。第１図
において総ての押しボタンが押されていない時は
共通接点３０により通話回路５が線路端子１及び
２に接続され、発振回路３２は線路端子１から切
り離されている。 Conventionally, as shown in FIG. 1, this type of telephone circuit has adopted a system in which a mechanical contact of a push button dial is used to switch between a dial oscillation circuit and a telephone call circuit. That is, in FIG. 1, 1 and 2 are first and second line terminals, respectively, and 3 is a dial oscillation circuit, which includes a common contact 30 that operates in common to all push buttons, and a dial oscillation circuit that operates in accordance with each push button ( It includes a frequency contact 31 for making (make), an oscillation circuit 32, and an output resistor 33, 4 is a bias resistor to the dial oscillation circuit 3, and 5 is a communication circuit. In FIG. 1, when all the push buttons are not pressed, the communication circuit 5 is connected to the line terminals 1 and 2 by the common contact 30, and the oscillation circuit 32 is disconnected from the line terminal 1.
押しボタンを押すと、共通接点３０が動作し、
通話回路５が線路端子１から切り離され、発振回
路３２が線路端子１及び２に接続されると共に、
押下されたボタンに対応した周波数接点３１が動
作し発振回路３２は対応した周波数を発振し、出
力抵抗器３３を介して線路端子１，２間に出力さ
れる。 When the push button is pressed, the common contact 30 operates,
The communication circuit 5 is disconnected from the line terminal 1, the oscillation circuit 32 is connected to the line terminals 1 and 2, and
The frequency contact 31 corresponding to the pressed button operates, and the oscillation circuit 32 oscillates the corresponding frequency, which is outputted between the line terminals 1 and 2 via the output resistor 33.
このように構成された電話機回路においては、
ダイヤル発振回路３と通話回路５を切り換えるの
にメカニカル接点３０を用いているため切り換え
時にメカニカル接点のチヤタリング現象のためダ
イヤル信号が数msec断続され、有効信号時間が
短くなる欠点があつた。 In the telephone circuit configured in this way,
Since the mechanical contact 30 is used to switch between the dial oscillation circuit 3 and the telephone call circuit 5, the dial signal is interrupted for several milliseconds due to the chattering phenomenon of the mechanical contact at the time of switching, resulting in a disadvantage that the effective signal time is shortened.
さらにダイヤル発振回路３に含まれる押しボタ
ン・スイツチは、共通接点３０と周波数接点３１
の両者を備えているため、その機構は複雑で高価
である。 Further, the push button switch included in the dial oscillation circuit 3 has a common contact 30 and a frequency contact 31.
The mechanism is complicated and expensive.
本発明はこのような２つの欠点を解決し、簡易
な押しボタンスイツチでチヤツタリングの無い高
品質のダイヤル信号を送出する電話機回路を提供
するものである。 The present invention solves these two drawbacks and provides a telephone circuit that sends out high-quality dialing signals without chattering using a simple push-button switch.
本発明によると第１及び第２の線路端子と、ダ
イヤル発振回路と、第１及び第２の抵抗器と、通
話回路と、スイツチ制御回路と、第１及び第２の
スイツチング素子とを具備し、前記第１の線路端
子を前記ダイヤル発振回路の正電源端子と前記第
１のスイツチング素子の１端に接続し、前記第１
のスイツチング素子の他端を前記通話回路の正電
源端子に接続し、前記第２の線路端子を前記第１
の抵抗器の１端と前記通話回路の負電源端子と前
記第２のスイツチング素子の１端に接続し、前記
第２のスイツチング素子の他端を前記第２の抵抗
器を介して前記ダイヤル発振回路の負電源端子と
前記第１の抵抗器の他端に接続し、前記ダイヤル
発振回路の制御出力端子を前記スイツチ制御回路
の入力端子に接続し、前記スイツチ制御回路の第
１の出力端子を前記第１のスイツチング素子の制
御入力端子に、前記スイツチ制御回路の第２の出
力端子を前記第２のスイツチング素子の制御入力
端子にそれぞれ接続することを特徴とする電話機
回路が得られる。 According to the present invention, the device includes first and second line terminals, a dial oscillation circuit, first and second resistors, a communication circuit, a switch control circuit, and first and second switching elements. , the first line terminal is connected to the positive power supply terminal of the dial oscillation circuit and one end of the first switching element;
The other end of the switching element is connected to the positive power supply terminal of the communication circuit, and the second line terminal is connected to the first line terminal.
One end of the resistor is connected to the negative power terminal of the communication circuit and one end of the second switching element, and the other end of the second switching element is connected to the dial oscillation through the second resistor. A negative power supply terminal of the circuit is connected to the other end of the first resistor, a control output terminal of the dial oscillation circuit is connected to an input terminal of the switch control circuit, and a first output terminal of the switch control circuit is connected to the input terminal of the switch control circuit. A telephone circuit is obtained, characterized in that the second output terminal of the switch control circuit is connected to the control input terminal of the first switching element, and the second output terminal of the switch control circuit is connected to the control input terminal of the second switching element, respectively.
次に本発明の１実施例について図面を参照して
説明する。 Next, one embodiment of the present invention will be described with reference to the drawings.
第２図は本発明の１実施例のブロツク回路図
で、１，２は第１及び第２の線路端子、３はダイ
ヤル発振回路、４はダイヤル発振回路３への第１
のバイアス用の抵抗器、５は通話回路５，６はス
イツチ制御回路である。さらにダイヤル発振回路
３は、各押しボタンに対応して動作（メーク）す
る周波数接点３１と、発振回路３２と、出力抵抗
器３３を含む。 FIG. 2 is a block circuit diagram of one embodiment of the present invention, where 1 and 2 are first and second line terminals, 3 is a dial oscillation circuit, and 4 is a first line terminal to the dial oscillation circuit 3.
5 is a communication circuit 5, and 6 is a switch control circuit. Furthermore, the dial oscillation circuit 3 includes a frequency contact 31 that operates (makes) in response to each push button, an oscillation circuit 32, and an output resistor 33.
そして前記第１の線路端子１を前記ダイヤル発
振回路３の正電源端子と前記第１のスイツチング
素子としてのPNPトランジスタ７のエミツタに接
続し、前記PNPトランジスタ７のコレクタを前記
通話回路５の正電源端子に接続し、前記第２の線
路端子２を前記第１の抵抗器４の１端と前記通話
回路５の負電源端子と前記第２のスイツチング素
子としてのNPNトランジスタ８のエミツタに接
続し、前記NPNトランジスタ８のコレクタを第
２の抵抗器９を介して前記ダイヤル発振回路３の
負電源端子と前記第１の抵抗器４の他端に接続
し、前記ダイヤル発振回路３の制御出力端子３４
を前記スイツチ制御回路６の入力端子６０に接続
し、前記スイツチ制御回路６の第１の出力端子６
１を前記PNPトランジスタ７のベースに、前記ス
イツチ制御回路６の第２の出力端子６２を前記
NPNトランジスタ８のベースにそれぞれ接続す
る。 The first line terminal 1 is connected to the positive power supply terminal of the dial oscillation circuit 3 and the emitter of the PNP transistor 7 as the first switching element, and the collector of the PNP transistor 7 is connected to the positive power supply terminal of the dial oscillation circuit 5. terminal, and connects the second line terminal 2 to one end of the first resistor 4, the negative power supply terminal of the communication circuit 5, and the emitter of the NPN transistor 8 as the second switching element, The collector of the NPN transistor 8 is connected to the negative power supply terminal of the dial oscillation circuit 3 and the other end of the first resistor 4 via a second resistor 9, and the control output terminal 34 of the dial oscillation circuit 3 is connected to the collector of the NPN transistor 8.
is connected to the input terminal 60 of the switch control circuit 6, and the first output terminal 6 of the switch control circuit 6 is connected to the input terminal 60 of the switch control circuit 6.
1 to the base of the PNP transistor 7, and the second output terminal 62 of the switch control circuit 6 to the base of the PNP transistor 7.
Each is connected to the base of the NPN transistor 8.
押しボタンが押されていない時には、周波数接
点３１は動作していなく、このことは発振回路３
２で検出され抵抗器３３に発振出力を送出しない
と共に、制御出力端子３４に無押下を示す信号が
出力し、この出力信号はスイツチ制御回路６の制
御入力端子６０に伝えられ、スイツチ制御回路６
の第１の出力端子６１からPNPトランジスタ７を
オンにする信号が出力し、スイツチ制御回路６の
第２の出力端子６２からNPNトランジスタ８を
オフにするような信号が出力する。従つてPNPト
ランジスタ７がオンすることにより通話回路が線
路端子１及び２に接続される。又発振回路３２の
発振出力はNPNトランジスタ８で線路端子２か
ら切り離されると共に、発振回路３２へのバイア
スは抵抗器４のみでバイアスされている。 When the pushbutton is not pressed, the frequency contact 31 is inactive, which indicates that the oscillation circuit 3
2, no oscillation output is sent to the resistor 33, and a signal indicating no press is output to the control output terminal 34. This output signal is transmitted to the control input terminal 60 of the switch control circuit 6, and the output signal is transmitted to the control input terminal 60 of the switch control circuit 6.
A signal that turns on the PNP transistor 7 is output from the first output terminal 61 of the switch control circuit 6, and a signal that turns off the NPN transistor 8 is output from the second output terminal 62 of the switch control circuit 6. Therefore, when the PNP transistor 7 is turned on, the communication circuit is connected to the line terminals 1 and 2. Further, the oscillation output of the oscillation circuit 32 is separated from the line terminal 2 by the NPN transistor 8, and the oscillation circuit 32 is biased only by the resistor 4.
押しボタンが押された場合は周波数接点３１が
動作し、その情報が発振回路３２で検出され、抵
抗器３３を介して発振信号が出力されると共に、
制御出力端子３４から押下信号が出力し、スイツ
チ制御回路６の制御入力端子６０に伝えられ、ス
イツチ制御回路６の第１の出力端子６１からPNP
トランジスタ７をオフにする信号が出力し、通話
回路５を線路端子１から切り離す。さらにスイツ
チ制御回路６の第２の出力端子６２からNPNト
ランジスタ８をオンにする信号が出力し、抵抗器
３３からの発振信号を線路端子２に接続すると共
に、抵抗器９を抵抗器４に並列に接続する。 When the push button is pressed, the frequency contact 31 operates, the information is detected by the oscillation circuit 32, and an oscillation signal is output via the resistor 33.
A push signal is output from the control output terminal 34 and transmitted to the control input terminal 60 of the switch control circuit 6, and the PNP signal is output from the first output terminal 61 of the switch control circuit 6.
A signal is output to turn off the transistor 7 and disconnect the communication circuit 5 from the line terminal 1. Furthermore, a signal to turn on the NPN transistor 8 is output from the second output terminal 62 of the switch control circuit 6, and the oscillation signal from the resistor 33 is connected to the line terminal 2, and the resistor 9 is connected in parallel to the resistor 4. Connect to.
この抵抗器９を抵抗器４に並列に接続すること
は、発振回路３２の回路電流が無発振時に比べて
発振時には大巾に増加するため、その動作に必要
な電流を供給するバイアス抵抗値を小さくする必
要があるからである。つまり発振回路３２は無発
振時には通話回路５の負荷になるべくならないよ
うに必要最小限の回路電流（通常100μＡ以下）
で周波数接点３１の動作を検出するように動作し
ているが、周波数接点３１の動作を検出すると発
振信号を線路端子１，２間に送出すべく発振する
が、その発振信号を無歪で送出するには無発振時
に必要な電流より数桁多い回路電流（通常数mA
以上）を必要とするから、無発振時にはそのバイ
アス抵抗は大きな抵抗器とし通話回路５の負荷を
軽くし発振時には無歪の発振出力を線路端子１，
２間に送出するようバイアス抵抗値を小さくする
必要がある。通常抵抗器４は10KΩ以上、抵抗器
９は数100Ωに選ばれる。 Connecting this resistor 9 in parallel to the resistor 4 is useful because the circuit current of the oscillation circuit 32 increases greatly during oscillation compared to when it is not oscillating, so the bias resistance value that supplies the current necessary for its operation is adjusted. This is because it needs to be made smaller. In other words, the oscillation circuit 32 uses the minimum necessary circuit current (usually 100 μA or less) so as not to become a load on the communication circuit 5 when not oscillating.
It operates to detect the operation of the frequency contact 31, but when the operation of the frequency contact 31 is detected, it oscillates to send an oscillation signal between the line terminals 1 and 2, but the oscillation signal is sent out without distortion. In order to
(above)), when there is no oscillation, the bias resistor should be a large resistor to lighten the load on the communication circuit 5, and when oscillation, the undistorted oscillation output is sent to the line terminal 1,
It is necessary to reduce the bias resistance value so that the signal is sent between 2 and 3. Usually, resistor 4 is selected to be 10KΩ or more, and resistor 9 is selected to be several 100Ω.
本発明は以上説明したように押しボタンスイツ
チのメカニカルな共通接点を第１及び第２のスイ
ツチング素子に置き換えることによりチヤツタリ
ングの無い発振信号を得ることが出来ると共にス
イツチの構造の単純化を可能とする経済的効果が
ある。 As explained above, the present invention makes it possible to obtain an oscillation signal without chattering and to simplify the structure of the switch by replacing the mechanical common contact of the push button switch with the first and second switching elements. It has economic effects.
第１図は従来の回路例を示したブロツク回路
図、第２図は本発明の１実施例を示すブロツク回
路図である。
１……線路端子、２……線路端子、３……ダイ
ヤル発振回路、４……抵抗器、５……通話回路、
６……スイツチ制御回路、７……PNPトランジス
タ、８……NPNトランジスタ、９……抵抗器、
３０……共通接点、３１……周波数接点、３２…
…発振回路、３３……抵抗器、６０……制御入力
端子、６１……制御出力端子、６２……制御出力
端子。
FIG. 1 is a block circuit diagram showing an example of a conventional circuit, and FIG. 2 is a block circuit diagram showing an embodiment of the present invention. 1...Line terminal, 2...Line terminal, 3...Dial oscillation circuit, 4...Resistor, 5...Telephone circuit,
6...Switch control circuit, 7...PNP transistor, 8...NPN transistor, 9...Resistor,
30... Common contact, 31... Frequency contact, 32...
...Oscillation circuit, 33...Resistor, 60...Control input terminal, 61...Control output terminal, 62...Control output terminal.
Claims (1)
路と、第１及び第２の抵抗器と、通話回路と、ス
イツチ制御回路と、第１及び第２のスイツチング
素子とを具備し、前記第１の線路端子を前記ダイ
ヤル発振回路の正電源端子と前記第１のスイツチ
ング素子の１端に接続し、前記第１のスイツチン
グ素子の他端を前記通話回路の正電源端子に接続
し、前記第２の線路端子を前記第１の抵抗器の１
端と前記通話回路の負電源端子と前記第２のスイ
ツチング素子の１端に接続し、前記第２のスイツ
チング素子の他端を前記第２の抵抗器を介して前
記ダイヤル発振回路の負電源端子と前記第１の抵
抗器の他端に接続し、前記ダイヤル発振回路の制
御出力端子を前記スイツチ制御回路の入力端子に
接続し、前記スイツチ制御回路の第１の出力端子
を前記第１のスロツチング素子の制御入力端子
に、前記スイツチ制御回路の第２の出力端子を前
記第２のスイツチング素子の制御入力端子にそれ
ぞれ接続することを特徴とする電話機回路。1 comprising first and second line terminals, a dial oscillation circuit, first and second resistors, a telephone communication circuit, a switch control circuit, and first and second switching elements; 1 line terminal is connected to the positive power terminal of the dial oscillation circuit and one end of the first switching element, the other end of the first switching element is connected to the positive power terminal of the communication circuit, and 2 line terminal of the first resistor
The other end of the second switching element is connected to the negative power terminal of the dial oscillation circuit through the second resistor, and the other end of the second switching element is connected to the negative power terminal of the dial oscillation circuit. and the other end of the first resistor, a control output terminal of the dial oscillation circuit is connected to an input terminal of the switch control circuit, and a first output terminal of the switch control circuit is connected to the first slotting terminal. A telephone circuit, characterized in that a second output terminal of the switching control circuit is connected to a control input terminal of the second switching element, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4314182A JPS58161457A (en) | 1982-03-18 | 1982-03-18 | Telephone set circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4314182A JPS58161457A (en) | 1982-03-18 | 1982-03-18 | Telephone set circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58161457A JPS58161457A (en) | 1983-09-26 |
| JPS6256707B2 true JPS6256707B2 (en) | 1987-11-26 |
Family
ID=12655554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4314182A Granted JPS58161457A (en) | 1982-03-18 | 1982-03-18 | Telephone set circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58161457A (en) |
-
1982
- 1982-03-18 JP JP4314182A patent/JPS58161457A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58161457A (en) | 1983-09-26 |
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