KR930002042B1 - 전자동조 튜너용 전압 중첩회로 - Google Patents

전자동조 튜너용 전압 중첩회로 Download PDF

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Publication number
KR930002042B1
KR930002042B1 KR1019890002304A KR890002304A KR930002042B1 KR 930002042 B1 KR930002042 B1 KR 930002042B1 KR 1019890002304 A KR1019890002304 A KR 1019890002304A KR 890002304 A KR890002304 A KR 890002304A KR 930002042 B1 KR930002042 B1 KR 930002042B1
Authority
KR
South Korea
Prior art keywords
voltage
tuning
transistor
aft
collector
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
KR1019890002304A
Other languages
English (en)
Korean (ko)
Other versions
KR890013886A (ko
Inventor
미츠히로 바바
Original Assignee
가부시기가이샤 도시바
아오이 죠이치
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 가부시기가이샤 도시바, 아오이 죠이치 filed Critical 가부시기가이샤 도시바
Publication of KR890013886A publication Critical patent/KR890013886A/ko
Application granted granted Critical
Publication of KR930002042B1 publication Critical patent/KR930002042B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • 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
    • H03J5/0254—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 transfered to a D/A converter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H03J7/08—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant using varactors, i.e. voltage variable reactive diodes
    • H03J7/10—Modification of automatic frequency control sensitivity or linearising automatic frequency control operation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
KR1019890002304A 1988-02-26 1989-02-25 전자동조 튜너용 전압 중첩회로 Expired - Fee Related KR930002042B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP25522 1988-02-26
JP1988025522U JPH0724813Y2 (ja) 1988-02-26 1988-02-26 電子同調チューナの電圧重畳回路

Publications (2)

Publication Number Publication Date
KR890013886A KR890013886A (ko) 1989-09-26
KR930002042B1 true KR930002042B1 (ko) 1993-03-22

Family

ID=12168390

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890002304A Expired - Fee Related KR930002042B1 (ko) 1988-02-26 1989-02-25 전자동조 튜너용 전압 중첩회로

Country Status (5)

Country Link
US (1) US4891708A (enExample)
JP (1) JPH0724813Y2 (enExample)
KR (1) KR930002042B1 (enExample)
DE (1) DE3905860A1 (enExample)
GB (1) GB2216352B (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294830A (en) * 1993-08-13 1996-05-08 Nec Corp Frequency synthesizer
KR0138330B1 (ko) * 1994-02-07 1998-05-15 김광호 방송수신기의 디지탈 전압튜닝방법
JP3631037B2 (ja) * 1999-03-18 2005-03-23 アルプス電気株式会社 テレビジョンチューナー
US6396550B1 (en) * 1999-11-05 2002-05-28 Samsung Electronics Co., Ltd. Method and device for precision tuning, and method and device for matching vestigial sideband signal in television

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591858A (en) * 1968-05-31 1971-07-06 Beckman Instruments Inc Pulse rate to analog converter
US3858000A (en) * 1972-12-04 1974-12-31 Warwick Electronics Inc Extended range afc system
JPS53108219A (en) * 1977-03-03 1978-09-20 Toshiba Corp Channel selection device
US4344187A (en) * 1979-10-18 1982-08-10 Nippon Gakki Seizo Kabushiki Kaisha Radio receiver with system for maintaining optimum tuning
JPS57182934U (enExample) * 1981-05-15 1982-11-19
US4450587A (en) * 1981-11-27 1984-05-22 Rca Corporation Tuning arrangement for providing relatively uniform automatic fine tuning sensitivity
JPS59215113A (ja) * 1983-05-23 1984-12-05 Victor Co Of Japan Ltd テレビジヨン信号受信装置のａｆｃ回路
US4748684A (en) * 1986-06-03 1988-05-31 Information Resources, Inc. Fast tuning control for a television system
US4814887A (en) * 1988-05-23 1989-03-21 General Instrument Corporation Automatic frequency control

Also Published As

Publication number Publication date
JPH01129919U (enExample) 1989-09-05
DE3905860C2 (enExample) 1992-08-27
GB2216352B (en) 1992-01-22
US4891708A (en) 1990-01-02
DE3905860A1 (de) 1989-09-07
JPH0724813Y2 (ja) 1995-06-05
KR890013886A (ko) 1989-09-26
GB2216352A (en) 1989-10-04
GB8904032D0 (en) 1989-04-05

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