JPS5869155A - Power-on reset circuit for push button type dp signal transmitting dial circuit - Google Patents

Power-on reset circuit for push button type dp signal transmitting dial circuit

Info

Publication number
JPS5869155A
JPS5869155A JP16918381A JP16918381A JPS5869155A JP S5869155 A JPS5869155 A JP S5869155A JP 16918381 A JP16918381 A JP 16918381A JP 16918381 A JP16918381 A JP 16918381A JP S5869155 A JPS5869155 A JP S5869155A
Authority
JP
Japan
Prior art keywords
circuit
reset
capacitor
lsi
power
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.)
Pending
Application number
JP16918381A
Other languages
Japanese (ja)
Inventor
Hitoshi Yamamoto
仁 山本
Norio Saito
斉藤 典夫
Yasuo Tomita
富田 泰夫
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.)
Taiko Electric Works Ltd
Original Assignee
Taiko Electric Works 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 Taiko Electric Works Ltd filed Critical Taiko Electric Works Ltd
Priority to JP16918381A priority Critical patent/JPS5869155A/en
Publication of JPS5869155A publication Critical patent/JPS5869155A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/30Devices which can set up and transmit only one digit at a time
    • H04M1/31Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits

Landscapes

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

Abstract

PURPOSE:To keep the storage of telephone numbers for a prescribed time, by using the circuit constitution not using the power supply of station when a hook switch is disconnected, then availing charging voltage of a capacitor, and resetting a dial LSI again even at momentary interruption of lines. CONSTITUTION:In closing a hook switch Hsb, a current is supplied to a push button type DP signal transmitting dial circuit LSI through a constant current circuit CRD and a diode D2 to charge a capacitor C2 through a resistor 11. A transistor TR2 is turned on with a voltage between telephone lines L1, L2 voltage-divided with a diode D1, and resistors R8, R9 to reset the LSI. At the momentary interruption of lines, a voltage between the lines L1 anc L2 is not used and the LSI is reset again with the charging voltage of the capacitor C2 to store the storage of the telephone number within a prescribed time.

Description

【発明の詳細な説明】 本発明は電話番号の記憶を保持するための電源をコンデ
ンサのチャージ電源から得ることにより電話回線の瞬断
に対して再リセットされないようにした押しボタン式D
P信号送出ダイヤルのパワーオンリセット回路に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention provides a push-button type D which obtains power for retaining the memory of a telephone number from a capacitor charging power supply, thereby preventing resetting in the event of a momentary disconnection of the telephone line.
This relates to the power-on reset circuit of the P signal sending dial.

従来の押しボタン式DP信号送出ダイヤルはパワオンリ
セット即ち電源投入時に記憶をリセットする方式がとら
れ、その回路は第1図又は第2図の通りである。
The conventional push-button type DP signal sending dial employs a power-on reset method, that is, a method of resetting the memory when the power is turned on, and the circuit thereof is as shown in FIG. 1 or 2.

第1図、第2図においてLSIは押しボタン式DP信号
送出ダイヤル回路(以下ダイヤル回路と略称する)で、
PBダイヤルのキーボードから入力したダイヤル数字(
電話番号)を蓄積 −変換して一連のダイヤルインパル
ス(DP倍信号として送出する回路でIC素子として市
販されている。
In FIGS. 1 and 2, the LSI is a push button type DP signal sending dial circuit (hereinafter abbreviated as dial circuit).
Dial numbers entered from the PB dial keyboard (
This circuit stores and converts telephone numbers) and sends them out as a series of dial impulses (DP double signals), and is commercially available as an IC device.

こ\で動作を説明する。第1′図で、フックスイッチH
81が閉じると、局線に接続されている電話機端子Ll
、L2から通話回路Nに電流が供給される。一方抵抗R
1,R2,R3を経て電話機端子のLlつまり+側に接
続されていたダイヤル回路LSIのリセット端子H8は
、フックスイッチH81と同時にH82が閉ぢることに
よって、抵抗R1,コンデンサC1,抵抗R5,H82
の経路でコンデンサC1にチャージされる時間を経た後
に電話機端子L2つまり一側に接続されたことになる。
Here's how it works. In Figure 1', hook switch H
When 81 is closed, the telephone terminal Ll connected to the central office line
, L2 to the communication circuit N. On the other hand, resistance R
The reset terminal H8 of the dial circuit LSI, which was connected to the Ll or + side of the telephone terminal via 1, R2, and R3, is connected to the resistor R1, capacitor C1, resistor R5, H82
After the time has elapsed for the capacitor C1 to be charged through the path , it is connected to the telephone terminal L2, that is, to one side.

これでH8端子が十から−と極性が変り、パワオンリセ
ットが完了し、ダイヤル可能と同時に記憶可能となる。
This changes the polarity of the H8 terminal from 10 to -, completes the power-on reset, and allows dialing and memorization at the same time.

なお、ダイヤル回路LSIにおけるキーボードからの入
力端子は省略して示した。
Note that the input terminal from the keyboard in the dial circuit LSI is omitted from illustration.

第2図ではフックスイッチH8aが閉ぢると通話回路N
に電流が供給され、一方フツクスイッチHS ’aが閉
ぢる前はトランジスタTR1のベース電流が流れないの
でトランジスタTRiはOFFであって抵抗R4、R5
を通ってリセット端子H8は+側に接続されていたもの
が、フックスイッチH8aが閉ぢると抵抗R6とR7で
分圧された電圧がトランジスタTRイに加わりベース電
流が流れるのでトランジスタTR1はONとなるためリ
セット端子H8は一側にH8の極性が十から−に変化す
るのでパワーオンリセットが完了する。CRDは定電流
回路であり、ダイヤル回路LSIの動作を安定させる。
In Figure 2, when the hook switch H8a is closed, the communication circuit N
On the other hand, before the hook switch HS'a is closed, the base current of the transistor TR1 does not flow, so the transistor TRi is OFF and the resistors R4 and R5
The reset terminal H8 was connected to the + side through the hook switch H8a, but when the hook switch H8a is closed, the voltage divided by the resistors R6 and R7 is applied to the transistor TR, and the base current flows, so the transistor TR1 is turned on. Therefore, the reset terminal H8 is on one side, and the polarity of H8 changes from 10 to -, completing the power-on reset. CRD is a constant current circuit and stabilizes the operation of the dial circuit LSI.

V+、V−はダイヤル回路LSIの電源端子である。V+ and V- are power supply terminals of the dial circuit LSI.

第1図、第2図とも電話回線に瞬断があった場合には記
憶されていた電話番号はリセットされてしまう欠点があ
る。
Both FIG. 1 and FIG. 2 have the disadvantage that if there is a momentary interruption in the telephone line, the stored telephone number will be reset.

また、フックスイッチを断にした状態では局電源を使用
できないという条件がある場合には、実施できないので
、この点からも第1図、第2図の回路は適切ではない。
Further, if there is a condition that the local power source cannot be used with the hook switch turned off, this cannot be implemented, and from this point of view as well, the circuits shown in FIGS. 1 and 2 are not appropriate.

本発明はこれらの欠点を除去するため、フックスイッチ
が断となっている常時は、局の電源を使用しない回路構
成にすると共に、コンデンサのチャージ電源を使用する
ことにより回線の瞬断に対してもダイヤル回路LSIが
再リセットされるのを防ぐようにしようとするものであ
る。
In order to eliminate these drawbacks, the present invention has a circuit configuration that does not use the station's power supply whenever the hook switch is disconnected, and also uses a capacitor charging power supply to prevent momentary line interruptions. This is also an attempt to prevent the dial circuit LSI from being reset again.

以下図面について詳細に説明する。The drawings will be explained in detail below.

第3図が本発明の一実施例を示す回路図である。H8b
 はフックスイッチ、N、LSI、Ll。
FIG. 3 is a circuit diagram showing one embodiment of the present invention. H8b
is a hook switch, N, LSI, Ll.

R2は第1図、第2図の場合と同じである。R2 is the same as in FIGS. 1 and 2.

動作を説明する。今、フックスイッチH8bが閉じると
通話回路Nに電流が供給され、一方定電流回路CRD、
ダイオードD2を通してダイヤル回路LSIにも電圧が
印加されると共に、抵抗R11を通してチャージ用のコ
ンデンサC2に電流が流れ込みチャージが始まる。
Explain the operation. Now, when the hook switch H8b closes, current is supplied to the communication circuit N, while the constant current circuit CRD,
A voltage is also applied to the dial circuit LSI through the diode D2, and current flows into the charging capacitor C2 through the resistor R11 to start charging.

ここでチャージ用コンデンサC2の静電容量は記憶時間
に影響するから、ある程度大きい必要がある。従って端
子V+の電圧がダイヤル回路LSIが充分動作できる電
圧になるまでにわずかな時間を要する。
Here, since the capacitance of the charging capacitor C2 affects the storage time, it needs to be large to some extent. Therefore, it takes a short time for the voltage at terminal V+ to reach a voltage at which the dial circuit LSI can operate sufficiently.

リセット端子H8は、パワーオン即ちフックスイッチH
8bが閉ぢた後、抵抗R,10を通って端子V+と同時
間で電圧が上っていく。一方ダイオードD1を通って抵
抗R8,R9により分圧された電圧がトランジスタTR
2のベースに加わるが、コンデンサC3があるためこれ
にチャージする時間を経てからトランジスタTR2のベ
ース電流が流れ、トランジスタTR2をOnさせリセッ
ト端子H8が−に接続されてパワーオンリセットが完了
する。従って抵抗R8とコンデンサC3を調整してトラ
ンジスタTR2がOnする時間を前記のコンデンサC2
のチャージによる端子■十の電圧がダイヤル回路LSI
として充分な電圧になるまでの時間より長くしておけば
ダイヤル回路LSIは誤動作しない。
Reset terminal H8 is the power on, ie hook switch H
After 8b is closed, the voltage increases through resistors R and 10 at the same time as terminal V+. On the other hand, the voltage divided by the resistors R8 and R9 through the diode D1 is transferred to the transistor TR.
However, since there is a capacitor C3, the base current of the transistor TR2 flows after a period of time to charge the capacitor C3, turning on the transistor TR2 and connecting the reset terminal H8 to -, completing the power-on reset. Therefore, by adjusting the resistor R8 and the capacitor C3, the time required for the transistor TR2 to turn on is determined by adjusting the capacitor C2.
Terminal ■ 10 voltage due to charging of dial circuit LSI
The dial circuit LSI will not malfunction if the time is set longer than the time required to reach a sufficient voltage.

また電話回線に瞬断があった場合(例えば、PBX加入
電話機で°0゛発信して外線に接続してから相手番号を
ダイヤルする時の”α発信の後に、局側に回線が切り換
わる場合の瞬断など)は、従来即ち第1図、第2図の回
路であれば瞬断によってパワーオンリセットされてしま
い、瞬断する前の記憶した電話番号はリセットされてし
まうと云う不都合を生ずる。本発明では瞬断があった場
合、前述のコンデンサC6にチャージされた電荷がトラ
ンジスタTR2のべ一スミ流を流れつづけさせるため、
トランジスタTR2はOn状態をつづけるので瞬断があ
っても再リセットされることはない。
In addition, if there is a momentary interruption in the telephone line (for example, when a PBX subscriber telephone dials °0゛, connects to an outside line, and then dials the other party's number, the line is switched to the central office after dialing ``α'') In the case of conventional circuits, that is, those shown in Figures 1 and 2, the power-on reset occurs due to the instantaneous interruption, resulting in the inconvenience that the telephone number stored before the instantaneous interruption is reset. In the present invention, when there is a momentary interruption, the charge charged in the capacitor C6 continues to flow through the base current of the transistor TR2.
Since the transistor TR2 continues to be in the ON state, it will not be reset again even if there is a momentary interruption.

但しフックスイッチIF(Sbを切った時コンデンサC
3のチャージ電圧が長い間維持され、トランジスタTR
2がON状態を続けてリセット端子H8を−に保持して
いたのでは、次のダイヤル時にパワオンリセットされな
いため抵抗R9にて適当な時間で放電させるようにしで
ある。
However, when hook switch IF (Sb is turned off, capacitor C
The charge voltage of 3 is maintained for a long time, and the transistor TR
2 continues to be in the ON state and the reset terminal H8 is held at -, the power-on reset will not occur at the next dialing, so the resistor R9 is made to discharge the power for an appropriate time.

またコンデンサC6のチャージ電荷が抵抗R8を通って
流れ出さないようダイオードD1で防いでいる。またダ
イオードD2もコンデンサC2のチャージ電荷が定電流
回路CRDの方向にもれないように働いている。
Further, the diode D1 prevents the charge in the capacitor C6 from flowing out through the resistor R8. Further, the diode D2 also functions to prevent the charge in the capacitor C2 from flowing toward the constant current circuit CRD.

以上説明したように本発明によれば、局の電源がフック
スイッチ断の常時使用出来ない条件の場合でも使用する
ことが出来、且つ回線の瞬断があっても再リセットされ
ることなく、一定時間内は電話番号の記憶を保持するこ
とが出来る。
As explained above, according to the present invention, the station power supply can be used even when the hook switch is disconnected and cannot be used all the time, and even if there is a momentary disconnection of the line, it will not be reset again and will remain constant. Phone numbers can be retained for a limited time.

第1図、第2図は従来の回路図、第3図は本発明の一実
施例を示す回路図である。
1 and 2 are conventional circuit diagrams, and FIG. 3 is a circuit diagram showing an embodiment of the present invention.

H81、H82,H8a、H8b−・・フックスイッチ
、N・・・通話回路、LSI・・・押しボタン式DP信
号送出ダイヤル回路、H8・・・リセット端子、Ll、
L2・・・電話機端子、■+、■−・・・電源端子、C
RD・・・定電流回路、TRt 、TR2・・・トラン
ジスタ、Dl、D2・・・ダイオード、C1〜C6・・
・コンデンサ、R1−R11・・・抵抗 特許出願人 株式会社 大興電機製作所 取締役社長 肥 後 大 介 オ1図 才2図 1 才3図
H81, H82, H8a, H8b--Hook switch, N...Telephone circuit, LSI...Push button type DP signal sending dial circuit, H8...Reset terminal, Ll,
L2...Telephone terminal, ■+, ■-...Power terminal, C
RD...constant current circuit, TRt, TR2...transistor, Dl, D2...diode, C1-C6...
・Capacitor, R1-R11...Resistance patent applicant Daiko Higo, President and CEO, Daiko Electric Manufacturing Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 1、 フックスイッチが開くことによって放電されるコ
ンデンサのチャージ電源を使用して押しボタン式Dr信
号送出ダイヤル回路のダイヤル番号の記憶を一時的に保
持するようにするとともに、上記押しボタン式DP信号
送出回路のリセット信号をフックスイッチのメークによ
って得られる電圧から導いてコンデンサと抵抗よりなる
時間調整回路を経て上記押しボタン式DP信号送出ダイ
ヤル回路のリセット端子に与えるようにしたことを特徴
とする押しボタン式DP信号送出ダイヤル回路のパワー
オンリセット回路。
1. The memory of the dial number of the push-button type Dr signal sending dial circuit is temporarily held by using the charging power of the capacitor discharged when the hook switch is opened, and the push-button type DP signal sending dial circuit is A push button characterized in that a circuit reset signal is derived from the voltage obtained by making the hook switch, passes through a time adjustment circuit consisting of a capacitor and a resistor, and is applied to the reset terminal of the push button type DP signal sending dial circuit. Power-on reset circuit for the DP signal sending dial circuit.
JP16918381A 1981-10-21 1981-10-21 Power-on reset circuit for push button type dp signal transmitting dial circuit Pending JPS5869155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16918381A JPS5869155A (en) 1981-10-21 1981-10-21 Power-on reset circuit for push button type dp signal transmitting dial circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16918381A JPS5869155A (en) 1981-10-21 1981-10-21 Power-on reset circuit for push button type dp signal transmitting dial circuit

Publications (1)

Publication Number Publication Date
JPS5869155A true JPS5869155A (en) 1983-04-25

Family

ID=15881773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16918381A Pending JPS5869155A (en) 1981-10-21 1981-10-21 Power-on reset circuit for push button type dp signal transmitting dial circuit

Country Status (1)

Country Link
JP (1) JPS5869155A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187450U (en) * 1987-05-23 1988-11-30
US10279518B2 (en) 2012-10-30 2019-05-07 Nok Corporation Method for manufacturing sealing device, and sealing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63187450U (en) * 1987-05-23 1988-11-30
US10279518B2 (en) 2012-10-30 2019-05-07 Nok Corporation Method for manufacturing sealing device, and sealing device
US11298858B2 (en) 2012-10-30 2022-04-12 Nok Corporation Method for manufacturing sealing device, and sealing device

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