JPH0350469B2 - - Google Patents
Info
- Publication number
- JPH0350469B2 JPH0350469B2 JP61125790A JP12579086A JPH0350469B2 JP H0350469 B2 JPH0350469 B2 JP H0350469B2 JP 61125790 A JP61125790 A JP 61125790A JP 12579086 A JP12579086 A JP 12579086A JP H0350469 B2 JPH0350469 B2 JP H0350469B2
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- voltage
- diode
- power supply
- transistor
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Stand-By Power Supply Arrangements (AREA)
Description
【発明の詳細な説明】
(産業上の利用分野)
この発明は、線路を介して電話局からの電力で
動作する電話機において、電話機のオフフツク時
に、電話機電源を急速に電源の立上がりを早くす
る回路に関するものである。[Detailed Description of the Invention] (Industrial Application Field) This invention provides a circuit for quickly turning on the telephone power supply when the telephone is off-hook in a telephone that operates on power from a central office via a line. It is related to.
(従来の技術)
近年電話機等の端末機器はIC化が進んでおり、
このICの電源を電話局からの電力でまかなう様
になつてきている。(Conventional technology) In recent years, terminal devices such as telephones have become increasingly integrated into ICs.
It is becoming increasingly common for these ICs to be powered by electricity from the telephone office.
この場合、電話機内の電源は定電圧ダイオード
および定電流ダイオードなどの素子とコンデンサ
とにより構成することが普通であるが、このよう
な構成にすると、コンデンサの容量が大きい場合
には、電話機をオフフツクしてから電話機内電源
回路の電圧が電話機のダイヤル信号を送出可能な
電圧に上昇するまでに時間がかかり、オフフツク
後にダイヤルボタンを押下してもダイヤル信号が
出ない時間が生じ、オフフツク後1〜3秒間は電
話機が動作しないという現象が発生する。 In this case, the power supply inside the phone is usually constructed from elements such as constant voltage diodes and constant current diodes, and a capacitor. It takes time for the voltage of the power supply circuit inside the telephone to rise to a voltage that allows the telephone to send a dialing signal, and there is a time when no dialing signal is output even if the dial button is pressed after off-hook. A phenomenon occurs in which the phone does not work for 3 seconds.
(発明が解決しようとする問題点)
電話機のオフフツク時に電源を急速に充電して
オフフツク後すぐにダイヤルボタンを押下しても
ダイヤル信号が送出できるようにし、従来の技術
において記述した電話機不動作時間を従来の不動
作時間より短縮することを目的とするものであ
る。(Problems to be Solved by the Invention) The power supply is rapidly charged when the telephone is off-hook so that a dialing signal can be sent even if the dialing button is pressed immediately after the off-hook, thereby solving the telephone inoperation time described in the conventional technology. The purpose of this is to shorten the non-operating time compared to conventional methods.
(問題点を解決するための手段)と(作 用)
本発明は、オフフツク時の電話機内電源電圧の
立上がりを早くするために、オフフツク時に一定
時間電話局よりの回線をトランジスタとダイオー
ドにより閉結し、ダイオードの両端に発生する電
圧を利用して電話機内電源を急速に充電し、電源
電圧の立上がりを早くし、オフフツク後の電話機
不動作時間を短くするものである。(Means for Solving the Problems) and (Function) The present invention uses a transistor and a diode to close the line from the central office for a certain period of time during off-hook in order to speed up the rise of the power supply voltage within the telephone during off-hook. However, the voltage generated across the diode is used to rapidly charge the internal power supply of the telephone, thereby speeding up the rise of the power supply voltage and shortening the period during which the telephone is inoperative after off-hook.
(実施例) 以下、図面により詳細に説明する。(Example) A detailed explanation will be given below with reference to the drawings.
第2図は従来の電話機内電源回路を示す回路図
である。図において、CDは定電流ダイオード、
ZDは定電圧ダイオード、D1はダイオード、REC
はダイオードブリツジ、HS1はフツクスイツチ、
C1はコンデンサ、L1,L2は局線接続端子、VLは
電話機回路接続端子、VDDは電話機内端子であ
る。 FIG. 2 is a circuit diagram showing a conventional telephone power supply circuit. In the figure, CD is a constant current diode,
ZD is a constant voltage diode, D 1 is a diode, REC
is a diode bridge, HS 1 is a switch,
C 1 is a capacitor, L 1 and L 2 are office line connection terminals, VL is a telephone circuit connection terminal, and VDD is a terminal inside the telephone.
電話機の動作に必要な電源を電話局からの電力
で作成する場合、通話性能に影響を与えないよう
にするために、電話局からの線路と電話機の電源
回路間のインピーダンスを大きくする必要があ
る。 If the power required for the operation of the telephone is generated from the power from the central office, it is necessary to increase the impedance between the line from the central office and the telephone's power circuit in order to avoid affecting call performance. .
定電流ダイオードCDはインピーダンスが大き
いので、これを使用して電源を構成するのが一般
的である。 Since the constant current diode CD has a large impedance, it is common to use it to configure a power supply.
電話機がオフフツクするとフツクスイツチHS1
が閉じ、定電流ダイオードCDに電流が流れて、
コンデンサC1を充電し始める。 Switch HS 1 when the phone goes off-hook
closes, current flows through constant current diode CD,
Start charging capacitor C1 .
このとき、コンデンサC1の容量が大きいと、
コンデンサC1の充電に時間がかかるために電話
機内端子VDDの電圧が電話機回路の動作電圧に
達するのに1〜3秒を要し、この間は電話機が動
作しないという現象が発生する。 At this time, if the capacitance of capacitor C1 is large,
Since it takes time to charge the capacitor C1 , it takes 1 to 3 seconds for the voltage at the internal terminal VDD of the telephone to reach the operating voltage of the telephone circuit, and a phenomenon occurs in which the telephone does not operate during this time.
第1図は本発明の一実施例を示すもので、Q1
〜Q2はトランジスタ、D1〜D3はダイオード、
RECはダイオードブリツジ、CDは定電流ダイオ
ード、ZDは定電圧ダイオード、C1,C2はコンデ
ンサ、R1〜R4は抵抗、HS1,HS2はフツクスイ
ツチ、L1,L2は局線接続端子、VLは電話機回路
接続端子、VDDは電話機内電源端子である。 FIG. 1 shows an embodiment of the present invention, in which Q 1
~ Q2 is a transistor, D1 ~ D3 are diodes,
REC is a diode bridge, CD is a constant current diode, ZD is a constant voltage diode, C 1 and C 2 are capacitors, R 1 to R 4 are resistors, HS 1 and HS 2 are switch switches, and L 1 and L 2 are central lines. The connection terminal, VL, is the telephone circuit connection terminal, and VDD is the telephone internal power supply terminal.
大電流を流す回路は、インピーダンスが小さく
常に用いると通話性能に影響を与えるので、オフ
フツク直後で通話開始以前の電話機の電源回路を
急速充電するときのみに使用する。 A circuit that flows a large current has a small impedance and will affect call performance if used constantly, so it is used only when rapidly charging the power supply circuit of the telephone immediately after off-hook and before the start of a call.
また小電流を流す回路はインピーダンスが大き
く通話への影響がないので、電話機の通常使用状
態で用いる。 Also, since the circuit that allows a small current to flow has a large impedance and does not affect communication, it is used during normal use of the telephone.
次に動作について説明する。 Next, the operation will be explained.
オフフツクすると、フツクスイツチHS1,HS2
が閉じる。オフフツクした時点では、電話機内電
源端子VDDは0VでありトランジスタQ3はオフし
ている。 When off-hooks, the hook switches HS 1 , HS 2
closes. At the time of off-hook, the internal power supply terminal VDD of the telephone is 0V and the transistor Q3 is turned off.
よつてトランジスタQ2,Q1がオンし、局線か
らの電流がL1−REC−Q1−D1−REC−L2の経路
で流れ、ダイオードD1両端に電圧(約2.8V)が
発生する。 Therefore, transistors Q 2 and Q 1 are turned on, current from the office line flows through the path L 1 −REC−Q 1 −D 1 −REC−L 2 , and a voltage (approximately 2.8V) is applied across diode D 1 . Occur.
この電圧はダイオードD2を通つてコンデンサ
C1を充電しこの電圧が電話機内電源VDDとなる。
ダイオードD2を通してコンデンサC1を充電して
いる電圧がトランジスタQ3をオンするに必要な
電圧まで上昇すると、トランジスタQ3が抵抗R1
とコンデンサC2で定まる時定数だけ遅れてオン
する。 This voltage is passed through the diode D2 to the capacitor
C1 is charged and this voltage becomes the internal power supply VDD of the phone.
When the voltage charging capacitor C1 through diode D2 rises to the voltage required to turn on transistor Q3 , transistor Q3 charges across resistor R1.
It turns on with a delay of a time constant determined by capacitor C2 .
トランジスタQ3がオンすると、トランジスタ
Q2,Q1がオフし本回路の動作が終了する。 When transistor Q 3 turns on, the transistor
Q 2 and Q 1 turn off and the operation of this circuit ends.
以後の電話機内回路電圧は、定電流ダイオード
CDおよび定電圧ダイオードZDからなる電源回路
から供給される。トランジスタQ1がオンしてい
る時間は約300msであり、オフフツク後約300ms
で電話機内電源電圧を立上げることができる。 After that, the circuit voltage inside the phone is controlled by a constant current diode.
It is supplied from a power supply circuit consisting of CD and a constant voltage diode ZD. Transistor Q1 is on for about 300ms and after off-hook is about 300ms
You can start up the power supply voltage inside the phone.
(発明の効果)
従来の電話機内電源回路の構成において、コン
デンサの容量が大きい場合に、オフフツク後、電
話機内電源の電圧が電話機回路の動作電圧に達す
るまでに時間がかかり、オフフツク後、1〜3秒
は電話機が動作しないという現象が発生したが、
本発明により、オフフツク後の電話機内電源電圧
の立上りを約300msに短縮することができ、オフ
フツク後の電話機不動作時間を短縮することがで
きる。(Effects of the Invention) In the conventional configuration of the internal power supply circuit of the telephone, when the capacitor has a large capacity, it takes time for the voltage of the internal power supply of the telephone to reach the operating voltage of the telephone circuit after off-hook. There was a phenomenon where the phone did not work for 3 seconds, but
According to the present invention, the rise of the power supply voltage within the telephone after off-hook can be shortened to approximately 300 ms, and the time during which the telephone is inactive after off-hook can be shortened.
第1図は本発明の一実施例を示す電話機電源の
急速充電回路図(点線内)、第2図は従来の電話
機内電源回路図である。
Q1〜Q3はトランジスタ、D1〜D3はダイオー
ド、RECはダイオードブリツジCDは定電流ダイ
オード、ZDは定電圧ダイオード、C1,C2はコン
デンサ、R1〜R4は抵抗、HS1,HS2はフツクス
イツチ、L1,L2は局線接続端子、VLは電話機回
路接続端子、VDDは電話機内電源端子。
FIG. 1 is a quick charging circuit diagram (within dotted lines) of a telephone power supply showing an embodiment of the present invention, and FIG. 2 is a conventional telephone power supply circuit diagram. Q 1 to Q 3 are transistors, D 1 to D 3 are diodes, REC is a diode bridge, CD is a constant current diode, ZD is a constant voltage diode, C 1 and C 2 are capacitors, R 1 to R 4 are resistors, HS 1 , HS 2 is the switch, L 1 and L 2 are the office line connection terminals, VL is the telephone circuit connection terminal, and VDD is the telephone internal power supply terminal.
Claims (1)
た定電流ダイオードと定電圧ダイオードと、前記
定電圧ダイオードが発生するツエナー電圧により
充電されるコンデンサとを備え、該コンデンサの
充電電荷をダイヤル回路用の電源として供給する
電話機の電源回路において、トランジスタとダイ
オードとの直列回路を、前記定電流ダイオードと
定電圧ダイオードに並列に接続し、前記トランジ
スタのベースに電話機の電源電圧が動作に必要な
電圧以下のときは前記トランジスタをオンし、動
作に必要な電源電圧に達した時は前記トランジス
タをオフとするように動作する制御回路を設け、
電話機のオフフツクにより、電話局からの電流が
前記トランジスターとダイオードに流れることに
よりダイオードの両端に電圧が発生し前記発生電
圧により電話機内の電源を急速充電するととも
に、電話機内の電源電圧が一定電圧に達すると、
前記トランジスタをオフとすることを特徴とする
電話機電源の急速充電回路。1. A constant current diode and a constant voltage diode are connected in series in a DC loop for the line, and a capacitor is charged by the Zener voltage generated by the constant voltage diode, and the charged charge of the capacitor is used as a power source for the dial circuit. In the power supply circuit of a telephone, a series circuit of a transistor and a diode is connected in parallel to the constant current diode and the constant voltage diode, and when the power supply voltage of the telephone is below the voltage required for operation, is provided with a control circuit that operates to turn on the transistor and turn off the transistor when the power supply voltage necessary for operation is reached,
When the telephone is off-hook, current from the central office flows through the transistor and diode, which generates a voltage across the diode.The generated voltage rapidly charges the power supply inside the telephone, and the power supply voltage inside the telephone becomes a constant voltage. When you reach
A quick charging circuit for a telephone power supply, characterized in that the transistor is turned off.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61125790A JPS62284562A (en) | 1986-06-02 | 1986-06-02 | Quick charging circuit for telephone set power source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61125790A JPS62284562A (en) | 1986-06-02 | 1986-06-02 | Quick charging circuit for telephone set power source |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS62284562A JPS62284562A (en) | 1987-12-10 |
JPH0350469B2 true JPH0350469B2 (en) | 1991-08-01 |
Family
ID=14918930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61125790A Granted JPS62284562A (en) | 1986-06-02 | 1986-06-02 | Quick charging circuit for telephone set power source |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62284562A (en) |
-
1986
- 1986-06-02 JP JP61125790A patent/JPS62284562A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS62284562A (en) | 1987-12-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4645882A (en) | Latching relay drive circuit for use in telephone sets | |
JP2002252731A (en) | Power supply circuit for phone | |
JPS6330051A (en) | Telephone | |
JPH0350469B2 (en) | ||
US5113434A (en) | Battery boosted dial memory | |
US5317634A (en) | Telephone subset arrangement | |
JPH0618396B2 (en) | Power supply circuit for telephone | |
JPH0221812Y2 (en) | ||
JPH02503254A (en) | telephone circuit equipment | |
US5384837A (en) | Line switch control circuit arrangement for telephone subset | |
JPH01245639A (en) | Telephone set with last number redial memory erasing function | |
JPS5921569Y2 (en) | calling circuit device | |
JP2546098Y2 (en) | Charging circuit | |
JP2511404B2 (en) | Electronic telephone | |
JPH0422588Y2 (en) | ||
JPS6338593Y2 (en) | ||
JPS6312603Y2 (en) | ||
JPS6316196Y2 (en) | ||
KR870001638B1 (en) | Hook flash circuit of telephone | |
JPH0450787B2 (en) | ||
JPH0213987B2 (en) | ||
JPH0355955A (en) | Power supply control circuit for telephone set | |
JPS62232251A (en) | Memory dial telephone set | |
JPS6376547A (en) | Telephone set | |
JPH0375105B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |