KR940004803Y1 - Telephone ring signal generator protecting circuit - Google Patents
Telephone ring signal generator protecting circuit Download PDFInfo
- Publication number
- KR940004803Y1 KR940004803Y1 KR2019890018778U KR890018778U KR940004803Y1 KR 940004803 Y1 KR940004803 Y1 KR 940004803Y1 KR 2019890018778 U KR2019890018778 U KR 2019890018778U KR 890018778 U KR890018778 U KR 890018778U KR 940004803 Y1 KR940004803 Y1 KR 940004803Y1
- Authority
- KR
- South Korea
- Prior art keywords
- signal generator
- ring signal
- transistor
- transformer
- protecting circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/04—Transistors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 링신호발생기 2 : 스피커1: Ring Signal Generator 2: Speaker
3 : 보호회로 R : 저항3: protection circuit R: resistance
Q : 트랜지스터 D : 다이오드Q: Transistor D: Diode
TS : 트랜스 Vcc : 전원TS: Trans Vcc: Power
본 고안은 전화기의 링신호 발생기에서 출력되는 신호를 스피크로 보낼 때 트랜스에서 발생하는 연기전력으로부터 링신호발생기를 보호하기위한 회로에 관한 것이다.The present invention relates to a circuit for protecting a ring signal generator from smoke power generated by a transformer when sending a signal output from a ring signal generator of a telephone.
종래의 전화기는 상대방으로부터 걸려오는 신호가 착신되면 링신호 발생기에 전원을 인가하여 착신됨을 알리는 링신호가 트랜스에 유기되어 스피커를 구동시켜 링신호가 발신하게 된다.In the conventional telephone, when a signal from the other party is received, a ring signal indicating that the call is received by applying power to the ring signal generator is induced in a transformer to drive a speaker to transmit a ring signal.
이때 링신호는 약 75V정도이며 트랜스에 유기될 경우 역기 전력이 발생하여 접지로 흐르던 전류가 반대로 흘러 링신호 발생기가 파괴 되는 문제점이 발생되었던 것이다.At this time, the ring signal is about 75V, and when it is induced in the transformer, the counter electromotive force is generated and the current flowing to the ground is reversed, causing the ring signal generator to be destroyed.
따라서 본 고안은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로 트랜지스터와 다이오드 및 저항으로 링신호 발생기를 보호할 수 있는 회로를 제공하여 트랜스의 역기전력으로 부터 링신호 발생기를 보호하고자하는데 본 고안의 목적이 있는 것이다.Therefore, the present invention was devised to solve the above problems, and provides a circuit that can protect the ring signal generator with a transistor, a diode, and a resistor to protect the ring signal generator from the counter electromotive force of the transformer. It is.
이하 첨부된 도면에 의해 상세히 설명하면 다음과 같다.Hereinafter, described in detail by the accompanying drawings as follows.
제1도에서와 같이 상대방의 수신신호가 착신되면 링신호 발생기(1)에 전원(Vcc)을 인가하고 상기 링신호 발생기(1)의 출력신호가 트랜스(Ts)로 유기되어 스피커(2)를 구동하는 통상의 전화기에 있어서 링신호 발생기(1)에 인가되는 전원(Vcc)은 저항(R)을 통하여 트랜지스터(Q) 베이스로 접속하고 상기 트랜지스터(Q) 콜렉터단은 트랜스(TS)에, 에미터측은 접지로 각각 연결하되 콜렉터와 에미터사이에 다이오드(D)를 접속하여 보호회로(3)를 구성한 것이다.As shown in FIG. 1, when the reception signal of the other party is received, the power supply Vcc is applied to the ring signal generator 1, and the output signal of the ring signal generator 1 is induced into the transformer Ts to turn on the speaker 2. In a typical telephone which is driven, the power supply Vcc applied to the ring signal generator 1 is connected to the transistor Q base through the resistor R, and the transistor Q collector stage is connected to the transformer TS and the emi. The terminator is connected to ground, respectively, but the protection circuit 3 is configured by connecting a diode D between the collector and the emitter.
상기와 같은 구성으로 이루어진 본 고안의 작용 효과를 설명하면 다음과 같다.Referring to the effect of the present invention made of the configuration as described above are as follows.
상대방에서 전화가 걸려오면 전원(Vcc)이 링신호 발생기(1)로 인가됨에 따라 발생기(1)가 동작되어 수신자에게 이를 알리는 링신호가 출력된다. 이때 전원(Vcc)이 저항(R)을 통하여 트랜지스터(Q) 베이스에 인가되어 도통상태로 만들고 링신호 발생기(1)에서 출력되는 신호가 트랜스(TS)로 유기되어 스피커(2)를 구동하여 링신호를 발신한 후 트랜지스터(Q) 콜렉터와 에미터를 통해 접지로 흐르게 된다.When a call is received from the other party, the power source Vcc is applied to the ring signal generator 1 so that the generator 1 is operated to output a ring signal informing the receiver. At this time, the power supply Vcc is applied to the transistor Q base through the resistor R to bring it into a conductive state, and the signal output from the ring signal generator 1 is induced into the transformer TS to drive the speaker 2 to ring. After sending the signal, it flows through the transistor (Q) collector and emitter to ground.
이럴경우 트랜스(TS)에서 역기전력이 발생하여 링신호 발생기(1)로 역전압이 흐르면 트랜지스터(Q)에미터 전위가 높게 된다.In this case, when the counter electromotive force is generated in the transformer TS and the reverse voltage flows to the ring signal generator 1, the emitter potential of the transistor Q becomes high.
따라서 "하이(HIGH)"상태의 에미터 전위를 다이오드(D)를 통하여 트랜지스터(Q)콜렉터단에 인가시켜 콜렉터 전위를 높여 줌으로서 트랜스(TS)의 역기전력을 모두 트랜지스터(Q)로 흘려 보내어 링신호 발생기(1) 역기전력이 인가되지 못하여 결과적으로 링신호 발생기(1)를 보호할 수 있는 것이다.Therefore, the emitter potential of the "HIGH" state is applied to the transistor (Q) collector terminal through the diode (D) to increase the collector potential, so that all the counter electromotive force of the transformer (TS) flows to the transistor (Q). Since the signal generator 1 does not receive back electromotive force, it is possible to protect the ring signal generator 1 as a result.
이상에서 상술한 바와같이 작용하는 본 고안 트랜지스터(Q)와 다이오드(D) 그리고 저항(R)으로 보호회로(3)를 구성하여 트랜스(TS)에 접속되도록 함으로서 트랜스(TS)에서 발생되는 역기전력으로부터 링신호 발생기(1)를 보호하여 향상 안정된 동작을 수행 할 수 있도록한 유용한 고안인 것이다.From the counter electromotive force generated in the transformer TS, the protection circuit 3 is formed by the transistor Q, the diode D, and the resistor R, which act as described above, and is connected to the transformer TS. It is a useful design to protect the ring signal generator (1) to perform improved stable operation.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890018778U KR940004803Y1 (en) | 1989-12-12 | 1989-12-12 | Telephone ring signal generator protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890018778U KR940004803Y1 (en) | 1989-12-12 | 1989-12-12 | Telephone ring signal generator protecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR910013322U KR910013322U (en) | 1991-07-30 |
| KR940004803Y1 true KR940004803Y1 (en) | 1994-07-21 |
Family
ID=19293055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890018778U KR940004803Y1 (en) | 1989-12-12 | 1989-12-12 | Telephone ring signal generator protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR940004803Y1 (en) |
-
1989
- 1989-12-12 KR KR2019890018778U patent/KR940004803Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR910013322U (en) | 1991-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR970072108A (en) | High voltage electrostatic discharge protection circuit | |
| CA1106454A (en) | Photocoupling line isolation circuit | |
| EP0268530A3 (en) | Oscillation-free, short-circuit protection circuit | |
| DE3476727D1 (en) | Circuit arrangement for the drainage of overvoltages | |
| KR940004803Y1 (en) | Telephone ring signal generator protecting circuit | |
| JPH1075529A (en) | Protection against overvoltage of interface of telephone line | |
| JPS5944159A (en) | Surge protecting circuit of telephone set | |
| US4107474A (en) | Bipolar transistor switching network crosspoint | |
| KR890001348A (en) | Telephone circuit with overvoltage protection | |
| MX9404304A (en) | APPARATUS FOR THE PROTECTION OF OVERVOLTAGE OF TELEPHONE LINES. | |
| EP0746128B1 (en) | Telephone interface circuit with impedance termination during call pauses | |
| KR910003756Y1 (en) | Telephone circuit for broadcasting an announcement before on-line | |
| KR910010952A (en) | Volume control circuit of telephone ring signal | |
| KR200159192Y1 (en) | Digital input voltage limitation circuit | |
| JPS5780829A (en) | Output protecting circuit device | |
| KR100232725B1 (en) | Loop dialing circuit in key-phone system | |
| KR910000321Y1 (en) | Cordless phone ringing tone generating circuit | |
| KR880003783Y1 (en) | Relay torquing circuit | |
| CN2216725Y (en) | Alarm self-locking apparatus for embezzling telephone | |
| KR820002354Y1 (en) | Power supply circuit of chime bell | |
| JPH0555977A (en) | Radiotelephony | |
| KR880002344A (en) | Interface circuit of exchange for connection between telephone for exchange and telephone | |
| JPH0748891B2 (en) | Constant current loop formation circuit | |
| GB1461015A (en) | Electronic switch circuits | |
| KR900012465A (en) | Unpaid Phone Answering Power Supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 20010629 Year of fee payment: 8 |
|
| LAPS | Lapse due to unpaid annual fee |