KR960036383A - Low Noise Receiving Super Amplifier Control Device of Dependent Booster for Improving Intermodulation Characteristics of Mobile Phone - Google Patents

Low Noise Receiving Super Amplifier Control Device of Dependent Booster for Improving Intermodulation Characteristics of Mobile Phone Download PDF

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Publication number
KR960036383A
KR960036383A KR1019950004572A KR19950004572A KR960036383A KR 960036383 A KR960036383 A KR 960036383A KR 1019950004572 A KR1019950004572 A KR 1019950004572A KR 19950004572 A KR19950004572 A KR 19950004572A KR 960036383 A KR960036383 A KR 960036383A
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South Korea
Prior art keywords
booster
lna
main body
subordinate
unit
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KR1019950004572A
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Korean (ko)
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KR0129849B1 (en
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박찬현
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김주용
현대전자산업 주식회사
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Priority to KR1019950004572A priority Critical patent/KR0129849B1/en
Publication of KR960036383A publication Critical patent/KR960036383A/en
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Publication of KR0129849B1 publication Critical patent/KR0129849B1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

본 발명은 휴대용전화기의 종속형 부스터(Booster)에 관한 것으로, 특히 휴대용전화기를 차량에 장착하여 사용시 카폰(car phone) 수준의 통화를 위하여 사용되는 3watt 부스터의 구성에 있어서, 휴대용 전화기 본체와 고주파(RF) 경로를 공유하는 제작 단가가 저렴한 종속형 부스터의 수신부 인터모듈레이션(INTERMODULATION) 특성 열화에 기인하는 수신감도저하 및 수신불능상태를 제거하기 위한 것이며 반드시 휴대용전화기가 아니더라도 수신감도의 향상을 목적으로 사용하는 저잡음수신초단증폭기(LNA)의 2중화로 인한 문제점을 해결할 수 있도록 간단한 구성 및 저렴한 비용의 종속형 부스터의 성능을 독립형 부스터 이상으로 향상시킴에 따라 인터모듈레이션 특성이 50dB개선효과 즉, 인터모듈레이션 특성이 좋지 않은 수신기기도 본 발명의 흐름도 대로 수행할 경우 인터모듈레이션 특성에 의해서 발생하는 모든 문제점을 해결할 수 있을 뿐 아니라 인터모듈레이션 특성의 개선으로 인한 통화음질의 향상 및 혼신을 제거할 수 있어서 매우 유용하다.The present invention relates to a booster (Booster) of the portable telephone, especially in the configuration of a 3watt booster used for car phone level calls when using the portable telephone in a vehicle, the main body of the portable telephone and high frequency ( It is used to reduce reception sensitivity and reception failure due to deterioration of INTERMODULATION characteristics of subordinate booster of low cost subordinate booster. It is used to improve reception sensitivity even if it is not necessarily a mobile phone. In order to solve the problems caused by the dualization of low noise ultra low frequency amplifier (LNA), the intermodulation characteristic is improved by 50dB as the performance of the simple booster and the low cost dependent booster is higher than the independent booster. This bad receiver can also be performed according to the flowchart of the present invention. In this case, not only all problems caused by the intermodulation characteristics can be solved but also it is very useful because it can eliminate the improvement of the voice quality and the interference caused by the improvement of the intermodulation characteristics.

Description

휴대용전화기의 인터모듈레이션 특성 개선을 위한 종속형 부스터의 저잡음 수신초단증폭기 제어 장치Low Noise Receiving Super Amplifier Control Device of Dependent Booster for Improving Intermodulation Characteristics of Mobile Phone

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명 휴대용전화기의 인터모듈레이션 특성 개선을 위한 종속형 부스터의 저잡음수신초단증폭기 제어장치이 구성도, 제3도는 본 발명 휴대용전화기의 인터뮬듈레이션 특성 개선을 위한 종속형 부스터의 저잡음수신초단증폭기 제어 방법의 동작순서도이다.2 is a block diagram of a low noise receiving ultra-short amplifier control device of a slave booster for improving the intermodulation characteristics of the present invention, and FIG. 3 is a low noise receiving ultra-low amplifier of the sub booster for improving the intermodulation characteristics of the present invention. The operation flowchart of the control method is shown.

Claims (2)

고주파 케이블(RF CABLE)에 의해 부스터측의 입력부 듀플렉스 필터(23)와 연결되는 본체측의듀플렉스 필터(11)와, 상기 필터(11)에서 출력된 신호를 입력받아 증폭하여 중간주파수(I/F)부(13)에출력하는 수신용 증폭기(12)와, 수신용 증폭기(LNA) (12)에서 증폭된 고주파(RF)를 중간 주파수(IF)로 변환하여 그에 해당하는 수신신호의 세기(RSSI)의 신호를 중앙제어부(14)로 출력하는 중간 주파수부(13)와, 제어선에 으해 연결된 스위칭부(21)를 제어하는 중앙처리장치(CPU)(15)와 아날로그/디지탈 컨버터(A/D)(14)가 일체로된 중앙제어부(16)를 포함하여 이루어진 본체(10)와; 송신 및 수신 주파수의 분리를 위한 부스터측 입력부 듀플렉스 필터(23)와, 외부안테나(30)와 연결되는 출력측필터(24)와, 수신용 증폭기(22) 제어를 위한 스위칭 기능을 하는 트랜지스터(TR)로 이루어져 본체(10)의 중앙처리장치(15)에 제어선에 의해 연결되어 제어되는 스위칭부(21)와, 부스터의 입력측 듀플렉스 필터(23)를 포함하는 종속부스터(20)로 구성함을 특징으로 하는 휴대용전화기의 인터모듈레이션(INTERMODULATION) 특성 개선을 위한 종속형 부스터의 저잡음수신초단증폭기 제어 장치.The duplex filter 11 on the main body connected to the input duplex filter 23 on the booster side by a high frequency cable and the signal output from the filter 11 are amplified by receiving and amplifying the intermediate frequency (I / F). The receiving amplifier 12 and the high frequency RF amplified by the receiving amplifier (LNA) 12 are converted to the intermediate frequency IF and the corresponding received signal intensity RSSI is output to the unit 13. ), An intermediate frequency unit 13 for outputting a signal from the central control unit 14, a central processing unit (CPU) 15 for controlling the switching unit 21 connected to the control line, and an analog / digital converter (A /). A main body 10 including a central control unit 16 in which D) 14 is integrated; Booster side input duplex filter 23 for transmitting and receiving frequency separation, output side filter 24 connected to external antenna 30, and transistor TR for switching function for receiving amplifier 22 It consists of a switching unit 21 is connected to the central processing unit 15 of the main body 10 by a control line and controlled, and a subordinate booster 20 including an input side duplex filter 23 of the booster. Low noise receiver ultra-amplifier control device of subordinate booster to improve the INTERMODULATION characteristic of portable telephone. 제1항에 있어서, 상기 중앙처리장치(15)는 본체(10)와 종속부스터(20)에 전원이 인가되면 제어단자를 ‘하이’로 하고, 상기 ‘하이’레벨 신호는 바이어스 저항(R)을 통해 트랜지스터(TR)의 컬렉터와 에미터를 연결시켜 정상적으로 전원을 LNA(12)에 인가한 후 본체의 I/F부에서 발생시키는 RSSI 신호를 A/D(14)로 읽어 들이며, 상기 A/D(14)의 값이 -30dBm이상 인지를 감시하여, 이상이 아니면 계속감시하고, 이상일 경우에는 문제가 발생할 소지가 있다고 판단하여 제어단자를 ‘하이’에서 ‘로우’로 전환하며, 트랜지스터(TR)를 단선시켜 LNA(14)로 공급되는 전원을 차단하여 LNA(14)가 감쇄 모드로 동작하도록 하고, 이후 재차 RSSI를 체크하여 -90dBm 이하인지 확인하여, -90dBm 이하가 아닐 경우에는 아직 문제가 발생가능한 영역으로 판단하여 계속 ‘오프’상태를 유지하며, 이하일 경우에는 그 영역을 빠져 나왔다고 판단하여 ‘로우’에서 ‘하이’상태로 제어단자를 제어하여 초기상태로 돌아가며 끊임없이 루프를 반복수행토록 프로그램 된 것임을 특징으로 하는 휴대용전화기의 인터모듈레이션(INTERMODULATIO-N) 특성 개선을 위한 종속형 부스터의 저잡음수신초단증폭기 제어 장치.The control terminal of claim 1, wherein the central processing unit 15 sets the control terminal to 'high' when power is applied to the main body 10 and the slave booster 20, and the 'high' level signal is a bias resistor (R). After connecting the collector and the emitter of the transistor TR through the LNA 12, the power is normally applied to the LNA 12, and the RSSI signal generated by the I / F part of the main body is read into the A / D 14. Monitor if the value of D (14) is more than -30dBm and continue monitoring if it is not abnormal.If it is abnormal, determine that there is a problem, and switch the control terminal from 'high' to 'low' ), Cut off the power supply to the LNA 14 so that the LNA 14 operates in the attenuation mode, and then check the RSSI again to see if it is below -90 dBm. Remains 'off' by judging as possible area If it is below, it is judged that it has exited the area and controls the control terminal from 'low' to 'high' to return to the initial state and repeats the loop continuously, characterized in that it is programmed to carry out the loop (INTERMODULATIO-). N) Low noise receiver ultra-amplifier control device of subordinate booster to improve characteristics. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950004572A 1995-03-07 1995-03-07 Low noise block KR0129849B1 (en)

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KR1019950004572A KR0129849B1 (en) 1995-03-07 1995-03-07 Low noise block

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Application Number Priority Date Filing Date Title
KR1019950004572A KR0129849B1 (en) 1995-03-07 1995-03-07 Low noise block

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KR960036383A true KR960036383A (en) 1996-10-28
KR0129849B1 KR0129849B1 (en) 1998-04-14

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KR1019950004572A KR0129849B1 (en) 1995-03-07 1995-03-07 Low noise block

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