KR100298882B1 - Over-current prevention device of power amplification module - Google Patents
Over-current prevention device of power amplification module Download PDFInfo
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- KR100298882B1 KR100298882B1 KR1019960019740A KR19960019740A KR100298882B1 KR 100298882 B1 KR100298882 B1 KR 100298882B1 KR 1019960019740 A KR1019960019740 A KR 1019960019740A KR 19960019740 A KR19960019740 A KR 19960019740A KR 100298882 B1 KR100298882 B1 KR 100298882B1
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- 230000003321 amplification Effects 0.000 title claims abstract description 30
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 30
- 230000002265 prevention Effects 0.000 title abstract description 12
- 238000010586 diagram Methods 0.000 description 5
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- 230000001413 cellular effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
- H04M1/745—Protection devices or circuits for voltages surges on the line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
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- Signal Processing (AREA)
- Amplifiers (AREA)
- Protection Of Static Devices (AREA)
Abstract
본 발명은 전력증폭모듈의 과전류 방지장치에 관한 것으로, 특히 전화기 등의 전력증폭모듈을 보호하기 위한 정전원(Vcc)보다 항상 부전원을 먼저 공급하도록함으로써, 전력증폭모듈에서 발생되는 과전류를 방지하도록 하는 전력증폭모듈의 과전류 방지장치에 관한 것이다.[0001] The present invention relates to an overcurrent prevention device for a power amplification module, and more particularly, to an overcurrent prevention device for preventing a surge current generated in a power amplification module To an overcurrent prevention device for a power amplification module.
본 발명은 전화기 등의 전력증폭모듈을 보호하기 위한 정전원(Vcc) 보다 항상 부전원을 먼저 공급하도록함으로써, 부전원이 전력증폭모듈로 안정되게 공급된 상태에서 정전원이 공급되므로, 종래와같은 과전류현상이 방지되도록 하는 것이다.Since the sub power source is always supplied first rather than the positive power source Vcc for protecting the power amplifying module such as a telephone set, the constant power source is supplied while the sub power source is stably supplied to the power amplifying module. Thereby preventing an overcurrent phenomenon.
Description
제1도는 종래의 전력증폭모듈에 대한 구성을 보이는 블럭도이다.FIG. 1 is a block diagram showing a configuration of a conventional power amplifier module.
제2도는 제1도에 도시된 전력증폭모듈의 내부회로도이다.FIG. 2 is an internal circuit diagram of the power amplification module shown in FIG.
제3도는 제1도 및 제2도에 도시된 전력증폭모듈의 전압-전류 특성그래프이다.FIG. 3 is a graph of voltage-current characteristics of the power amplifier module shown in FIG. 1 and FIG. 2.
제4도는 본 발명에 따른 전력증폭모듈의 과전류 방지장치를 보이는 블럭도이다.FIG. 4 is a block diagram showing an overcurrent prevention device for a power amplification module according to the present invention.
제5도는 제4도에 도시된 전원공급지연회로부(3-1)에 의한 전원공급 시간지연을 보이는 그래프이다.FIG. 5 is a graph showing the power supply time delay by the power supply delay circuit unit 3-1 shown in FIG.
<도면의 주요부분에 대한 부호의 설명>Description of the Related Art
1 : 부전원스위칭회로부 2 : 신호발생부1: negative power switching circuit part 2: signal generating part
3 : 부전원 정류회로부 3-1 : 전원공급 지연회로부3: non-powered rectifying circuit section 3-1: power supply delay circuit section
4 : 정전원스위칭회로부 5 : 전력증폭모듈4: constant power switching circuit part 5: power amplifying module
본 발명은 전력증폭모듈의 과전류 방지장치에 관한 것으로, 특히 전화기 등의 전력증폭모듈을 보호하기 위한 정전원(Vcc)보다 항상 부전원(Vgg)을 먼저 공급하도록함으로써, 전력증폭모듈에서 발생되는 과전류를 방지하도록 하는 전력증폭모듈의 과전류 방지장치에 관한 것이다.The present invention relates to an overcurrent prevention device for a power amplification module, and more particularly, to a configuration in which a sub power source (Vgg) is always supplied prior to a constant voltage source (Vcc) for protecting a power amplification module To an overcurrent prevention device of a power amplification module.
일반적으로, 유선 또는 무선전화기나 휴대폰등의 전화기에는 그 출력단에 전력을 증폭시키는 전력증폭부가 내장되어 있다.Generally, a telephone such as a wired or wireless telephone or a cellular phone has a built-in power amplifier for amplifying power at its output terminal.
일반적인 기술에 관련되는 종래 전력증폭모듈에 대한 구성을 보이는 블럭도가 제1도에 도시되어 있으며 제1도를 참조하면, 부전원스위칭회로부(1)에 TX-on이 공급됨에 따라 부전원 정류회로부(3)에 전원을 공급하고, 이때 상기 부전원정류회로부(3)는 신호발생부(2)의 신호를 정류해서 전력증폭모듈(5)에 부전원(Vgg)을 제공한다. 또한, 정전원스위칭회로부(4)는 TX-on이 공급되면 정전원(Vcc)을 전력증폭모듈(5)에 공급한다.1 is a block diagram showing a configuration of a conventional power amplification module according to the related art. Referring to FIG. 1, TX-on is supplied to a sub-power switching circuit unit 1, The sub power rectifying circuit unit 3 rectifies the signal of the signal generating unit 2 and supplies the sub power source Vgg to the power amplifying module 5 at this time. Further, the constant-current switching circuit unit 4 supplies the constant power source Vcc to the power amplification module 5 when TX-on is supplied.
제2도에 도시된 바와 같이 종래의 전력증폭모듈에 있어서, 상기 전력증폭모듈(5)은 정전원과 부전원에 의해서 전력을 증폭하는 동작을 수행하게 되는데, 즉 제3도에 도시된 바와같이 TX-on제어에 따라서 부전원과 정전원을 각각 제어를 하였던 관계로, GaAs 전력증폭모듈의 특성에 부적합하고 부전원이 가해지기 전에 정전원이 먼저 인가되어서 전력증폭모듈에 과전류(심한 경우로 Vgs=0이면, 전류는 무한대가 됨)가 흐르게 되어 전력증폭모듈에 손상(동작불능상태등)을 초래시키는 문제점이 있었으며, 심한 경우에는 전력증폭모듈이 파괴되는 문제점이 있었던 것이다.As shown in FIG. 2, in the conventional power amplification module, the power amplification module 5 performs an operation of amplifying power by a positive power source and a negative power source, that is, as shown in FIG. 3 Since the negative power source and the positive power source are respectively controlled according to the TX-on control, the positive power source is applied before the negative power source is applied and the overcurrent (Vgs = 0, the current becomes infinite), causing damage to the power amplification module (such as inoperable state), and in the worst case, the power amplification module is destroyed.
본 발명은 상기한 문제점을 해결하기 위해 안출한 것인다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems.
따라서, 본 발명의 목적은 전화기 등의 전력증폭모듈을 보호하기 위한 정전원(Vcc) 보다 항상 부전원(Vgg)을 먼저 공급하도록함으로써, 전력증폭모듈에서 발생되는 과전류를 방지하도록 하는 전력증폭모듈의 과전류 방지장치를 제공하는데 있다.Therefore, it is an object of the present invention to provide a power amplification module for preventing an overcurrent generated in a power amplification module by supplying a sub power source Vgg at all times, rather than a constant voltage source Vcc for protecting a power amplification module, And an overcurrent prevention device.
상기한 목적을 달성하기 위한 기술적인 수단으로써, 본 발명의 전력증폭모듈의 과전류 방지장치는 TX-on공급에 의해서 부전원정류회로부에 전원을 공급하는 부전원스위칭회로부; 상기 부전원스위칭회로부로부터 공급된 전원에 의해서 신호발생부의 신호를 정류해서 부전원을 생성시키는 부전원 정류회로부; 상기 부전원 정류회로부의 부전원을 전력증폭모듈로 공급하면서, 이 부전원이 소정 전압에 도달할때까지 정전원 스위칭회로부의 전원공급을 강제지연시키는 전원공급 지연회로부;As a technical means for accomplishing the above object, the overcurrent prevention device of the power amplification module of the present invention includes: a sub power switching circuit part for supplying power to the sub power rectifier circuit part by TX-on supply; A sub power rectifying circuit section for rectifying a signal of the signal generating section by a power source supplied from the sub power switching circuit section to generate a sub power source; A power supply delay circuit part for supplying a sub power source of the sub power rectifier circuit part to the power amplification module and forcibly delaying the power source supply of the constant power source switching circuit part until the sub power source reaches a predetermined voltage;
상기 TX-on공급에 따라서 전원공급지연회로부의 지연시간후에 정전원을 전력증폭모듈로 공급하는 정전원스위칭회로부를 구비함을 특징으로 한다.And a constant power source switching circuit for supplying a constant power source to the power amplification module after a delay time of the power supply delay circuit according to the TX-on supply.
이하, 본 발명에 따른 전력증폭모듈의 과전류 방지장치의 바람직한 실시예를 첨부한 도면을 참조하여 설명한다.Hereinafter, preferred embodiments of an overcurrent prevention device for a power amplification module according to the present invention will be described with reference to the accompanying drawings.
본 발명에 참조된 도면들에서 실질적으로 동일한 구성과 기능을 가진 구성요소들은 동일한 부호를 사용할 것이다.In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.
제4도는 본 발명에 따른 전력증폭모듈의 과전류 방지장치를 보이는 블럭도로서, 제4도를 참조하면, 본 발명의 전력증폭모듈의 과전류 방지장치는 TX-on공급에 의해서 부전원정류회로부에 전원을 공급하는 부전원스위칭회로부(1)와, 상기 부전원스위칭회로부(1)로부터 공급된 전원에 의해서 신호발생부(2)의 신호를 정류해서 부전원을 생성시키는 부전원 정류회로부(3)와, 상기 부전원 정류회로부(3)의 부전원을 전력증폭모듈로 공급하면서, 이 부전원이 소정전압에 도달할때까지 정전원 스위칭회로부(4)의 전원공급을 강제지연시키는 전원공급 지연회로부(3-1)와, 상기 TX-on공급에 따라서 전원공급지연회로부(3-1)의 지연시간후에 정전원을 전력증폭모듈(5)로 공급하는 정전원스위칭회로부(4)를 구성한다.4 is a block diagram showing an overcurrent prevention device for a power amplification module according to the present invention. Referring to FIG. 4, the overcurrent prevention device of the power amplification module of the present invention includes a power- A sub power rectifying circuit section 3 for generating a sub power by rectifying the signal of the signal generating section 2 by the power supplied from the sub power switching circuit section 1; A power supply delay circuit unit (not shown) for supplying a sub power source of the sub power rectifying circuit unit 3 to the power amplifying module and forcibly delaying the power source of the constant power source switching circuit unit 4 until the sub power source reaches a predetermined voltage And supplies the constant power source to the power amplification module 5 after a delay time of the power supply delay circuit part 3-1 in accordance with the TX-on supply.
제5도는 제4도에 도시된 전원공급지연회로부에 의한 전원공급 시간지연을 보이는 그래프이다.FIG. 5 is a graph showing the power supply time delay by the power supply delay circuit shown in FIG.
이와같이 구성된 본 발명에 따른 작용 및 효과를 첨부도면에 의거하여 하기에 상세히 설명한다.The operation and effect according to the present invention thus constructed will be described in detail below with reference to the accompanying drawings.
제4도 및 제5도를 참조하여 본 발명을 설명하면, TX-on이 하이로 인가되면, 부전원스위칭회로부(1)의 내부 스위칭트랜지스터(Q1, Q2)가 연속도통상태로 되어 전원(Vcc)을 부전원정류회로부(3)로 제공한다.Referring to FIGS. 4 and 5, when TX-on is applied high, the internal switching transistors Q1 and Q2 of the sub-power switching circuit unit 1 are brought into a continuous conduction state, To the sub-power source rectifying circuit unit 3. The sub-
한편, 신호발생부(2)에서는 소정의 피크-피크전압(Vpp)을 가지는 대략 10.386MHz의 주파수의 사인파를 발생시키는데, 상기 부전원정류회로부(3)는 상기 부전원스위칭회로부(1)로부터 제공되는 전원(Vcc)에 의해서 제너다이오드(D11)와 트랜지스터(Q11) 및 그 주변회로동작으로 사인파신호를 정류해서 점차적으로 그 크기가 증가하여 소정의 음의크기를 가지도록 되는 부전원(Vgg)을 제공한다.The signal generator 2 generates a sine wave having a predetermined peak-to-peak voltage Vpp of approximately 10.386 MHz. The non-powered rectifier circuit 3 is provided from the sub- And a negative power source Vgg that gradually increases its magnitude and has a predetermined negative magnitude by rectifying the sinusoidal signal by the operation of the Zener diode D11 and the transistor Q11 and its peripheral circuits by the power source Vcc to provide.
상기 부전원 정류회로부(3)에서 제공되는 부전원(Vgg)과, 상기 외부로부터 제공되는 TX-on에 의해서 전원공급 지연회로부부(3-1)는 내부 스위칭트랜지스터(Q21)가 부전원이 소정 음의크기(대략 -4V정도)에 도달할때까지 도통상태가 되어 상기 TX-on의 하이레벨신호를 접지로 흐르게 함에따라, 상기 정전원스위칭회로부(4)는 오프상태로 있다가 부전원(Vgg)이 소정 음의 크기에 도달할 때 상기 정전원스위칭회부로(4)가 스위칭온되어 정전원(Vcc)을 전력증폭모듈(5)로 제공하는 것이다.The power supply delay circuit part 3-1 is connected to the internal switching transistor Q21 by a sub power source Vgg provided from the sub power source rectifier circuit part 3 and a TX- And the high-level signal of the TX-on flows to the ground until the voltage reaches a negative value (about -4 V), so that the constant-power-source switching circuit unit 4 is in the off- Vgg reaches a predetermined negative value, the constant power source switching switch section 4 is switched on to provide a constant power source Vcc to the power amplification module 5. [
상기 부전원(Vgg)이 소정 음의크기에 도달할 때 까지의 시간을 제5도에서 보이고 있으며, 상기한 바와같은 본 발명에서는 부전원(Vgg)이 전력증폭모듈(5)로 안정되게 공급된 상태에서 정전원(Vcc)이 공급되므로, 종래와같은 과전류현상은 초래되지 않게 되는 것이다.The time until the negative power source Vgg reaches a predetermined negative value is shown in FIG. 5. In the present invention as described above, the negative power source Vgg is stably supplied to the power amplification module 5 State power supply Vcc is supplied in the state that the overcurrent phenomenon like the conventional one is not caused.
상술한 바와같이 본 발명에 따르면, 전화기 등의 전력증폭모듈을 보호하기 위한 정전원(Vcc)보다 항상 부전원(Vgg)을 먼저 공급하도록함으로써, 전력증폭모듈에서 발생되는 과전류를 방지하도록 함에 의해, 제품의 신뢰성 및 수면연장 등이 확보되는 특별한 효과가 있는 것이다.As described above, according to the present invention, since the sub power source Vgg is always supplied before the constant power source Vcc for protecting the power amplification module of a telephone set or the like, the overcurrent generated in the power amplification module is prevented, There is a special effect that the reliability of the product and extension of the sleeping are secured.
이상의 설명은 본 발명의 일실시예에 대한 설명에 불과하며, 본 발명은 그 구성의 범위내에서 다양한 변경 및 개조가 가능하다.The above description is only an explanation of one embodiment of the present invention, and the present invention can be variously modified and modified within the scope of its constitution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960019740A KR100298882B1 (en) | 1996-06-04 | 1996-06-04 | Over-current prevention device of power amplification module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960019740A KR100298882B1 (en) | 1996-06-04 | 1996-06-04 | Over-current prevention device of power amplification module |
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| Publication Number | Publication Date |
|---|---|
| KR980007269A KR980007269A (en) | 1998-03-30 |
| KR100298882B1 true KR100298882B1 (en) | 2001-10-22 |
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| KR1019960019740A Expired - Fee Related KR100298882B1 (en) | 1996-06-04 | 1996-06-04 | Over-current prevention device of power amplification module |
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1996
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