KR920001942A - Frequency Synthesis Tuning Circuit and Method of Television Tuner - Google Patents

Frequency Synthesis Tuning Circuit and Method of Television Tuner Download PDF

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Publication number
KR920001942A
KR920001942A KR1019900009401A KR900009401A KR920001942A KR 920001942 A KR920001942 A KR 920001942A KR 1019900009401 A KR1019900009401 A KR 1019900009401A KR 900009401 A KR900009401 A KR 900009401A KR 920001942 A KR920001942 A KR 920001942A
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South Korea
Prior art keywords
signal
frequency
uhf
vhf
predetermined
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KR1019900009401A
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Korean (ko)
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KR920009010B1 (en
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김철진
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강진구
삼성전자 주식회사
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Priority to KR1019900009401A priority Critical patent/KR920009010B1/en
Priority to JP3115030A priority patent/JPH0685706A/en
Publication of KR920001942A publication Critical patent/KR920001942A/en
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Publication of KR920009010B1 publication Critical patent/KR920009010B1/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
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

내용 없음No content

Description

텔리비젼 튜너의 주파수 합성 동조 회로 및 방식Frequency Synthesis Tuning Circuit and Method of Television Tuner

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

제2도는 본 발명에 따른 텔리비젼 튜너 회로도.2 is a television tuner circuit diagram according to the present invention.

Claims (5)

텔리비젼 튜너회로에 있어서, 안테나(ANT)와, 소정 기능키 및 채널선택키를 가지며 그 키가 입력되면 그 키에 상응하는 데이타를 출력하는 키보드(102)와, 상기 키보드(102)로 부터 상기 데이타를 입력받아 그 키에 대응하는 기능이 수행될 수 있도록 각부를 제어하는 마이콤(103)과, 상기 마이콤(103)에 제어되어 VHF로우선택신호(B1)와 VHF하이 선택신호(B2) 및 UHF선택신호(B3)를 출력함으로서 벤드를 선택하는 벤드선택기(104)와, 상기 벤드선택기(104)로 부터 상기 VHF로우선택신호 (B1) 또는 상기 VHF하이선택신호(B2)와 소정 튜닝전압(VT)을 입력받아 상기 안테나 (ANT)로부터 VHF벤드의 신호가 입력될시 소정 채널을 선국한뒤 증폭하여 출력하는 VHF고주파 증폭기(101)와, 상기 벤드선택기(104)로부터 UHF선택신호(B3)가 입력되고 상기 튜닝전압 발생기(112)로 부터 튜닝전압(VT)이 공급될시 UHF대역의 소정 채널을 선국하고 그 선국된 신호를 증폭하여 출력하는 UHF고주파 증폭기(114)와, 상기 벤드선택기(104)로부터 VHF로우선택신호(B1)나 VHF하이 선택신호(B2)중 어느 하나가 입력되고 소정 VHF국부발진신호가 입력될시 상기 VHF고주파증폭기(101)의 출력 입력하여 상기 VHF국부발진신호와 혼합함으로서 중간주파수 신호를 생성시킨뒤 출력하는 VHF혼합기(106)와, 상기 UHF국부발진신호와 UHF벤드선택신호(B3)가 입력될시 상기 UHF고주파증폭기(114)의 출력을 입력하여 상기 UHF국부발진신호와 혼합하므로서 중간주파수신호를 생성한뒤 출력하는 UHF혼합기(116)와, 상기 튜닝전압(VT)을 입력하여 그 값에 따라 상기 UHF국부발진 신호를 생성하여 출력하는 국부발진기(201)와, 상기 UHF국부발진신호를 입력한 뒤 분주하므로서 VHF국부발진 신호를 생성하여 출력하는 제2분주기(202)와, 상기 제2분주기(202)의 출력을 입력하여 분주하며 소정 분주비 제어신호가 입력될시 그 값에 따라 분주비를 천이하는 분기(108)와, 상기 마이콤(103)으로 부터 제1기준값(A)을 입력받은 뒤 상기 분주기의 출력이 입력될시 다운카운트하여 그 값이 영(0)이 되면 천이되는 값을 상기 분주기(108)에 분주비제어신호로 출력하는 제어카운터(109)와, 상기 마이콤(103)으로 부터 제2기준값(Np)을 입력받고 상기 분주기(108)의 출력을 받아 상기 제1기준값을 디크리먼트하여 출력하며 카운트값이 영이 될때까지 반복하는 프로그래머블 카운터(110)와, 상기 프로그래머블 카운터(110)의 출력을 받아 기준주파수 신호 (fr)와 위상을 비교한 뒤 그 오차를 전압의 크기로 출력하는 위상비교기(111)와, 상기 위상비교기(111)의 출력을 로우패스필터링한뒤 직류 증폭한 후 튜닝전압(VT)을 발생시켜 출력하는 튜닝전압 발생기(112)로 구성됨을 특징으로 하는 텔리비젼의 주파수 합성 동조회로.In a television tuner circuit, a keyboard (102) having an antenna (ANT), a predetermined function key and a channel selection key and outputting data corresponding to the key when the key is input, and the data from the keyboard 102 The microcomputer 103 controls each unit so that a function corresponding to the key can be performed and the microcomputer 103 is controlled by the microcomputer 103 to select the VHF low selection signal B1 and the VHF high selection signal B2 and UHF. A bend selector 104 for selecting a bend by outputting a signal B3, the VHF low select signal B1 or the VHF high select signal B2 and a predetermined tuning voltage VT from the bend selector 104; When the VHF bend signal is input from the antenna ANT, the VHF high frequency amplifier 101 for amplifying and outputting a predetermined channel and the UHF selection signal B3 are input from the bend selector 104. And tuning voltage (VT) from the tuning voltage generator 112. When supplied, the UHF high frequency amplifier 114 tunes a predetermined channel of the UHF band and amplifies and outputs the selected signal, and the VHF low selection signal B1 or the VHF high selection signal B2 from the bend selector 104. VHF mixer 106 outputs the VHF high frequency amplifier 101 and mixes the VHF local oscillation signal to generate an intermediate frequency signal when the predetermined VHF local oscillation signal is input. When the UHF local oscillation signal and the UHF bend selection signal B3 are input, the output of the UHF high frequency amplifier 114 is input and mixed with the UHF local oscillation signal to generate an intermediate frequency signal and then output the UHF mixer ( 116, a local oscillator 201 that inputs the tuning voltage VT and generates and outputs the UHF local oscillation signal according to the value, and inputs and divides the UHF local oscillation signal to divide the VHF local oscillation signal. Generating A second divider 202 for outputting and a branch 108 for inputting and dividing the output of the second divider 202 and shifting the division ratio according to a value when a predetermined division ratio control signal is input; After receiving the first reference value A from the microcomputer 103 and down counting when the output of the frequency divider is input, the value that is shifted when the value becomes zero is divided into the frequency divider 108. The control counter 109 outputs a non-control signal and the second reference value Np from the microcomputer 103, receives the output of the divider 108, and decrements and outputs the first reference value. The programmable counter 110 repeats until the count value becomes zero, and the phase comparator 111 which receives the output of the programmable counter 110 and compares the phase with the reference frequency signal fr and outputs the error in the magnitude of the voltage. ) And low pass filtering the output of the phase comparator 111 A frequency synthesis tuning of telribijyeon characterized in that after amplification consisting of a tuning voltage generator (112) for output to generate the tuning voltage (VT). 제1항에 있어서, 발진증폭기(107)와 제2분주기(202)와 분주기(108)와 제어카운트(109)와 프로그래머블 카운터(110)와 위상 비교기(111)와 튜닝전압 발생기 (112)와 국부발진기(201)가 하나의 PLL부(203)로서 위상동기루프(PLL)임을 특징으로 하는 텔리비젼튜너의 주파수 합성동조 회로.The oscillator (107), the second divider (202), the divider (108), the control count (109), the programmable counter (110), the phase comparator (111), and the tuning voltage generator (112). And a local oscillator 201 is a phase-locked loop (PLL) as one PLL unit 203. 제1항에 있어서, 국부발진기(107)가 전압제어발진기(VCO)임을 특징으로 하는 텔리비젼튜너의 주파수 합성 동조회로.2. The frequency synthesized tuning circuit of a television tuner according to claim 1, wherein the local oscillator (107) is a voltage controlled oscillator (VCO). 텔리비젼 튜너의 동조방식에 있어서, 소정 UHF대역과 소정 VHF대역에서 소정 선택신호들(B1,B2,B3)로 상기 UHF대역과 상기 VHF대역을 선택하는 대역 선택 과정과, 소정 튜닝 전압(VT)으로 상기 VHF대역과 상기 UHF대역에서 소정 방송신호를 선국하는 방송 성국 과정과, 소정 UHF국부발진주파수와 소정 VHF국부발진주파수를 입력하여 상기 방송선국과정에서 선국한 방송신호와 혼합하므로서 중간주파수신호를 생성하여 출력하는 중간주파수 생성과정과, 소정 UHF국부발진주파수를 생성하여 상기 중간주파수생성과정에 UHF국부발진 주파수로 공급하며 상기 UHF국부발진주파수를 소정 분주비로 분주하여 상기 중간주파수 생성과정에 VHF국부 발진 주파수로 공급하는 국부발진주파수 생성과정으로 구성함을 특징으로 하는 텔리비젼 튜너의 주파수 합성 동조방식.In the tuning method of a television tuner, a band selection process of selecting the UHF band and the VHF band with predetermined selection signals B1, B2, and B3 in a predetermined UHF band and a predetermined VHF band, and a predetermined tuning voltage VT. A broadcast frequency tuning process for tuning a predetermined broadcast signal in the VHF band and the UHF band, and inputting a predetermined UHF local oscillation frequency and a predetermined VHF local oscillation frequency to generate an intermediate frequency signal by mixing with the broadcast signal tuned in the broadcasting tuning process. And generate a predetermined UHF local oscillation frequency and supply the UHF local oscillation frequency to the intermediate frequency generation process and divide the UHF local oscillation frequency at a predetermined division ratio to generate the VHF local oscillation process. A frequency synthesis tuning method of a television tuner, characterized in that it consists of a local oscillation frequency generation process supplied at a frequency. 제4항에 있어서, 분주비는, 두가지의 분주비를 가지며 서로 천이함을 특징으로 하는 텔리비젼 튜너의 주파수 합성 동조방식.5. The frequency synthesis tuning method of a television tuner according to claim 4, wherein the frequency division ratio has two frequency division ratios and shifts with each other. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900009401A 1990-06-25 1990-06-25 Syncronizing circuit and method for composing frequency in television tuner KR920009010B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019900009401A KR920009010B1 (en) 1990-06-25 1990-06-25 Syncronizing circuit and method for composing frequency in television tuner
JP3115030A JPH0685706A (en) 1990-06-25 1991-05-20 Circuit and method for wide-range tuning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900009401A KR920009010B1 (en) 1990-06-25 1990-06-25 Syncronizing circuit and method for composing frequency in television tuner

Publications (2)

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KR920001942A true KR920001942A (en) 1992-01-30
KR920009010B1 KR920009010B1 (en) 1992-10-12

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KR1019900009401A KR920009010B1 (en) 1990-06-25 1990-06-25 Syncronizing circuit and method for composing frequency in television tuner

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JP (1) JPH0685706A (en)
KR (1) KR920009010B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002118795A (en) * 2000-10-05 2002-04-19 Alps Electric Co Ltd Television signal reception tuner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5680936A (en) * 1979-12-04 1981-07-02 Sanyo Electric Co Ltd Multiband receiver

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Publication number Publication date
JPH0685706A (en) 1994-03-25
KR920009010B1 (en) 1992-10-12

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