KR970014171A - Receiving Sensitivity Improvement Method and Apparatus for Low Electric Field in Television Equipment - Google Patents

Receiving Sensitivity Improvement Method and Apparatus for Low Electric Field in Television Equipment Download PDF

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Publication number
KR970014171A
KR970014171A KR1019950026187A KR19950026187A KR970014171A KR 970014171 A KR970014171 A KR 970014171A KR 1019950026187 A KR1019950026187 A KR 1019950026187A KR 19950026187 A KR19950026187 A KR 19950026187A KR 970014171 A KR970014171 A KR 970014171A
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KR
South Korea
Prior art keywords
voltage
low noise
noise amplifier
signal
electric field
Prior art date
Application number
KR1019950026187A
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Korean (ko)
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KR0153882B1 (en
Inventor
김인수
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950026187A priority Critical patent/KR0153882B1/en
Publication of KR970014171A publication Critical patent/KR970014171A/en
Application granted granted Critical
Publication of KR0153882B1 publication Critical patent/KR0153882B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/52—Automatic gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G2201/00—Indexing scheme relating to subclass H03G
    • H03G2201/30—Gain control characterized by the type of controlled signal
    • H03G2201/307—Gain control characterized by the type of controlled signal being radio frequency signal

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

1. 청구범위에 기재된 발명이 속한 기술분야1. TECHNICAL FIELD OF THE INVENTION

텔레비전 장치에 있어서 약전계일때의 수신감도개선 방법 및 장치Method and apparatus for improving reception sensitivity in weak electric field in television apparatus

2. 발명이 해결하려고 하는 기술적 과제2. The technical problem to be solved by the invention

사용자가 저잡음 증폭기를 동작시켜 놓고 채널을 전환하거나 선택해 놓은 채널에서 갑자기 신호가 양호하여져서 강전계로 변경되는 경우에 텔레비전의 화면이 튀거나 비틀리게 되는데 이러한 현상을 방지한다.If the user turns on the low-noise amplifier and switches the channel or selects the channel, suddenly the signal is good and the screen is changed to a strong electric field, which prevents the screen from bouncing or twisting.

3. 발명의 해결방법의 요지3. Summary of Solution to Invention

본 발명은 마이콤(4)이 수신되는 신호의 강/약전계를 체크하여 저잡음 증폭기(4)를 계속 온/오프 제어함으로써 신호가 갑자기 나빠지거나 좋아지거나 하는 것에 상관없이 언제나 양호한 화면을 시청할 수 있도록 해준다.The present invention allows the microcomputer 4 to check the strong / weak field of the received signal to continuously control the low noise amplifier 4 on / off so that the user can always watch a good picture regardless of whether the signal suddenly worsens or improves. .

4. 발명의 중요한 용도.4. Important uses of the invention.

텔레비전television

Description

텔레비전 장치에 있어서 약전계일때의 수신감도개선 방법 및 장치Method and apparatus for improving reception sensitivity in weak electric field in television apparatus

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 회로의 블럭 구성도.1 is a block diagram of a circuit according to the present invention.

제2도는 본 발명에 따른 제어 흐름도.2 is a control flowchart according to the present invention.

Claims (3)

튜너 앞단에 약전계의 수신감도를 개선하는 저잡음 증폭기가 설치된 텔레비젼 장치에서 수신감도를 개선하는 방법에 있어서, 상기 튜너에서 채널동조시 복조단의 자동이득제어신호의 전압이 미리 설정된 동작임게전압 이상보다 큰지 작은지를 소정 주기로 판단하는 제 1 과정과, 상기 판단에서 상기 자동이득제어신호의 전압기 상기 동작임계전압 이상보다 크면 상기 저잡음 증폭기를 오프제어하는 제2과정과, 상기 판단에서 상기 자동이득제어신호의 전압이 상기 동작임게전압 이상보다 작으면 상기 저잡음 증폭기를 온제어 하는 제3과정으로 이루어짐을 특징으로 하는 약전계일때의 수신감도개선 방법.A method for improving reception sensitivity in a television apparatus equipped with a low noise amplifier that improves reception sensitivity of a weak electric field in front of a tuner, wherein the voltage of the automatic gain control signal of the demodulation stage is more than a predetermined voltage when the channel is tuned by the tuner. A first step of determining whether it is large or small by a predetermined period, a second step of turning off the low noise amplifier when the voltage of the automatic gain control signal is greater than or equal to the operating threshold voltage in the determination, and the automatic gain control signal in the determination And a voltage of less than or equal to the operation threshold voltage is a third step of turning on the low noise amplifier. 튜너 앞단에 약전계의 수신감도를 개선하는 저잡음 증폭기가 설치된 텔레비젼 장치에서 수신감도를 개선하는 방법에 있어서, 상기 튜너에서 채널동조시 복조단의 자동이득제어신호의 전압이 미리 설정된 동작임게전압 이상보다 큰지 작은지를 소정 주기로 판단하는 제1과정과, 상기 판단에서 상기 자동이득제어신호의 전압이 상기 동작임계전압 이상보다 크면 강신호플레그를 세트하는 제2과정과, 상기 판단에서 상기 자동이득제어신호의 전압이 상기 동작임계전압 이상보다 작으면 상기 약신호플래그를 세트하는 제3과정과, 사용자가 상기 저잡음증폭기 사용을 위한 소정 키를 눌렀는지를 판단하는 제4과정과, 상기 키 눌려짐이 없음에 응답하여 상기 저잡음증폭기를 오프하는 제5과정과, 상기 키 눌려짐이 있음에 응답하여 세트된 플레그 종류를 판단하는 제6과정과, 상기 플레그가 강신호플레그이면 상기 저잡음 증폭기를 오프시키고 상기 플레그가 약신호플레그이면 상기 저잡음 증폭기를 온시키는 제7과정으로 이루어짐을 특징으로 하는 약전계일때의 수신감도개선 방법.A method for improving reception sensitivity in a television apparatus equipped with a low noise amplifier that improves reception sensitivity of a weak electric field in front of a tuner, wherein the voltage of the automatic gain control signal of the demodulation stage is more than a predetermined voltage when the channel is tuned by the tuner. A first step of determining whether the signal is large or small at a predetermined cycle; a second step of setting a strong signal flag when the voltage of the automatic gain control signal is greater than or equal to the operating threshold voltage in the determination; and the voltage of the automatic gain control signal in the determination. A third step of setting the weak signal flag when the operation threshold voltage is lower than the operation threshold voltage; a fourth step of determining whether a user presses a predetermined key for using the low noise amplifier; and in response to the absence of the key press. A fifth process of turning off the low noise amplifier, and the type of flag set in response to the key being pressed; And a sixth process, the flag is gangsinho flag if turning off the low noise amplifier and a receive sensitivity improved when a weak electric field characterized in that the flag is about flag signal constituted by any process of claim 7, turning on the low noise amplifier. 텔레비젼 장치에 있어서 약전계일때의 수신감도를 개선하는 장치에 있어서, 텔레비젼신호를 수신하는 안테나와, 잡음필터특성으로 증폭하여 수신된 텔레비젼신호의 약전계 시의 수신감도를 개선하는 저잡음 증폭기와, 상기 텔레비젼신호를 소정 채널로 동조하는 튜너와, 상기 텔레비젼신호를 중간주파대역으로 복조 및 자동이득제어신호를 발생하는 복조부와, 상기 자동이득제어신호 전압레벨을 미리 설정된 동작임계전압에 비교하여 상기 저잡음 증폭기의 동작을 온오프 제어하는 마이콤으로 구성함을 특징으로 하는 장치.An apparatus for improving reception sensitivity in a weak electric field in a television apparatus, comprising: an antenna for receiving a television signal, a low noise amplifier for amplifying with a noise filter characteristic and improving reception sensitivity in a weak electric field of a received television signal; A tuner for tuning a television signal to a predetermined channel, a demodulator for demodulating the television signal into an intermediate frequency band and generating an automatic gain control signal, and comparing the automatic gain control signal voltage level with a predetermined operating threshold voltage to achieve low noise Apparatus comprising a microcomputer for controlling the operation of the amplifier on and off. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026187A 1995-08-23 1995-08-23 Gain control apparatus and method in the case of weak receiving antenna in a tv KR0153882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950026187A KR0153882B1 (en) 1995-08-23 1995-08-23 Gain control apparatus and method in the case of weak receiving antenna in a tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950026187A KR0153882B1 (en) 1995-08-23 1995-08-23 Gain control apparatus and method in the case of weak receiving antenna in a tv

Publications (2)

Publication Number Publication Date
KR970014171A true KR970014171A (en) 1997-03-29
KR0153882B1 KR0153882B1 (en) 1998-11-16

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030004791A (en) * 2001-07-06 2003-01-15 삼성전기주식회사 Lna built-in tuner with self control function of lna

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