KR950013215A - Automatic Tuning Device - Google Patents

Automatic Tuning Device Download PDF

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Publication number
KR950013215A
KR950013215A KR1019940026288A KR19940026288A KR950013215A KR 950013215 A KR950013215 A KR 950013215A KR 1019940026288 A KR1019940026288 A KR 1019940026288A KR 19940026288 A KR19940026288 A KR 19940026288A KR 950013215 A KR950013215 A KR 950013215A
Authority
KR
South Korea
Prior art keywords
reference range
automatic tuning
electric field
field strength
radio waves
Prior art date
Application number
KR1019940026288A
Other languages
Korean (ko)
Inventor
요시타카 스미토모
Original Assignee
하기와라 가즈토시
가부시키가이샤 자나비 인포매틱스
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 하기와라 가즈토시, 가부시키가이샤 자나비 인포매틱스 filed Critical 하기와라 가즈토시
Publication of KR950013215A publication Critical patent/KR950013215A/en

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Classifications

    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • 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
    • H04N5/63—Generation or supply of power specially adapted for television receivers

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)
  • Television Receiver Circuits (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

본 발명은 수신 채널을 자동적으로 선국할 수 있는 자동선국장치에 관한 것으로서, 입력회로부, 고주파증폭부, 믹서부, 전압제어발진부, IF처리부, 영상증폭부, 표시부, 음성검파부, 음성증폭부, AGC 회로부, CPU, 조작부를 구비하는 자동선국장치에 적용되며, CPU는 조작부에 의해 자동 선국이 지시되면 선국 대상 채널을 VHF-L, VHF-H 및 UHF의 3가지 종류로 분류하고, 각 분류된 채널의 종류마다 AGC 회로부에서의 AGC 전압에 따라서 수신 전파에 포함되는 수평 동기 신호의 수를 계측하고, 이 수가 소정의 기준 범위내에 들어가는 수신채널만을 선국함으로써 실제로 시청할 수 있는 채널만을 선국할 수 있는 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tuning device capable of automatically tuning a reception channel, comprising: an input circuit unit, a high frequency amplifier unit, a mixer unit, a voltage controlled oscillator unit, an IF processor unit, an image amplifier unit, a display unit, a voice detector, an audio amplifier unit, Applied to an automatic tuning device equipped with an AGC circuit part, a CPU, and an operation part, the CPU classifies the channel to be tuned into three types of VHF-L, VHF-H, and UHF when automatic tuning is instructed by the operation part. For each type of channel, the number of horizontal synchronization signals included in the received radio waves is measured according to the AGC voltage in the AGC circuit section, and only the channels that can actually be watched can be tuned by tuning only the reception channels that fall within the predetermined reference range. It features.

Description

자동선국장치Automatic Tuning Device

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

Claims (7)

특정 주파수의 수신 전파중에 포함되는 동기 신호수를 계측하고, 일정 시간내에 계측된 상기 동기 신호수가 소정의 기준 범위내인 경우에 상기 특정 주파수를 선국하는 선국제어수단을 구비한 자동선국장치에 있어서, 수신 전파의 전계 강도를 검출하는 전계강도 검출수단과, 상기 검출된 전계 강도에 기초하여 상기 기준 범위를 조정하는 기준범위 조정수단을 구비하는 것을 특징으로 하는 자동선국장치.An automatic tuning apparatus comprising a pre-international language means for measuring the number of synchronization signals included in reception radio waves of a specific frequency and tuning the specific frequency when the number of synchronization signals measured within a predetermined time is within a predetermined reference range. And an electric field strength detecting means for detecting electric field strength of radio waves, and a reference range adjusting means for adjusting the reference range based on the detected electric field strength. 제1항에 있어서, 수신 전파의 전계 강도의 변동을 억제하기 위한 AGC전압을 출력하는 AGC회로를 구비하고, 상기 전계강도검출수단은 상기 AGC전압에 기초하여 상기 기준 범위를 조정하는 것을 특징으로 하는 자동선국장치.An AGC circuit for outputting an AGC voltage for suppressing fluctuations in electric field strength of received radio waves, wherein the electric field strength detecting means adjusts the reference range based on the AGC voltage. Automatic tuning device. 제2항에 있어서, 수신 전파를 주파수에 따라서 2가지 이상으로 분류하는 분류수단을 구비하고, 상기 기준범위 조정수단은 상기 분류시마다 정해진 상기 AGC전압에 기초하여 상기 기준 범위를 조정하는 것을 특징으로 하는 자동선국장치.3. The apparatus according to claim 2, further comprising: classification means for classifying received radio waves into two or more according to frequency, wherein the reference range adjusting means adjusts the reference range based on the AGC voltage determined for each classification. Automatic tuning device. 제2항에 있어서, 상기 선국제어수단은 상기 AGC전압이 소정 전압 이상의 주파수를 선국하지 않도록 하는 것을 특징으로 하는 자동선국장치.3. The automatic tuning device according to claim 2, wherein the pre-international language means ensures that the AGC voltage does not tune to a frequency above a predetermined voltage. 제2항에 있어서, 상기 기준범위 조정수단은 상기 AGC전압이 큰 만큼 상기 기준범위를 넓게 하는 것을 특징으로 하는 자동선국장치.3. The automatic tuning device according to claim 2, wherein the reference range adjusting means widens the reference range as the AGC voltage is larger. 제2항에 있어서, 수신 전파를 저주파 신호로 변환하여 출력하는 믹서회로를구비하고, 상기 AGC회로는 상기 믹서회로의 출력에 기초하여 상기 AGC전압을 출력하고, 상기 선국제어수단은 상기 믹서회로의 출력에 기초하여 상기 동기신호수를 계측하는 것을 특징으로 하는 자동선국장치.The mixer circuit according to claim 2, further comprising a mixer circuit for converting and receiving a received radio wave into a low frequency signal, wherein the AGC circuit outputs the AGC voltage based on an output of the mixer circuit. And the number of said synchronous signals is measured based on the output. 제1항 내지 제6항중 어느 한 항에 있어서, 상기 전계강도 검출수단은 텔레비젼 방송 전파의 전계 강도를 검출하고, 상기 기준범위 조정수단은 텔레비젼 방송 전파중에 포함되는 수평 동기 신호수의 기준 범위를 조정하는 것을 특징으로 하는 자동선국장치.The electric field strength detecting means detects an electric field strength of television broadcast radio waves, and the reference range adjusting means adjusts a reference range of the number of horizontal synchronization signals included in the television broadcast radio waves. Automatic tuning device, characterized in that. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940026288A 1993-10-20 1994-10-14 Automatic Tuning Device KR950013215A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP93-56663 1993-10-20
JP1993056663U JP2602619Y2 (en) 1993-10-20 1993-10-20 TV receiver

Publications (1)

Publication Number Publication Date
KR950013215A true KR950013215A (en) 1995-05-17

Family

ID=13033644

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940026288A KR950013215A (en) 1993-10-20 1994-10-14 Automatic Tuning Device

Country Status (2)

Country Link
JP (1) JP2602619Y2 (en)
KR (1) KR950013215A (en)

Also Published As

Publication number Publication date
JPH0725662U (en) 1995-05-12
JP2602619Y2 (en) 2000-01-24

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Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 19990812

Effective date: 20001031