KR970032019A - Power Switching Circuit of Arm Type High Frequency Modulator - Google Patents

Power Switching Circuit of Arm Type High Frequency Modulator Download PDF

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Publication number
KR970032019A
KR970032019A KR1019950043140A KR19950043140A KR970032019A KR 970032019 A KR970032019 A KR 970032019A KR 1019950043140 A KR1019950043140 A KR 1019950043140A KR 19950043140 A KR19950043140 A KR 19950043140A KR 970032019 A KR970032019 A KR 970032019A
Authority
KR
South Korea
Prior art keywords
amplifier
modulation
voltage
switching circuit
supplied
Prior art date
Application number
KR1019950043140A
Other languages
Korean (ko)
Other versions
KR100206371B1 (en
Inventor
이종진
Original Assignee
이형도
삼성전기 주식회사
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 이형도, 삼성전기 주식회사 filed Critical 이형도
Priority to KR1019950043140A priority Critical patent/KR100206371B1/en
Priority to GB9616733A priority patent/GB2307607B/en
Priority to DE19635228A priority patent/DE19635228C2/en
Publication of KR970032019A publication Critical patent/KR970032019A/en
Application granted granted Critical
Publication of KR100206371B1 publication Critical patent/KR100206371B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H04N5/7755—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver the recorder being connected to, or coupled with, the antenna of the television receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Transmitters (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Amplitude Modulation (AREA)

Abstract

본 발명은 팔방식용 고주파변조기(RF Modulator)의 전원스위칭회로에 관한 것으로, 특히 VTR시청시 에어방송채널의 RF신호를 차단함으로써, VTR시청화면을 양호히 개선토록하는 팔방식용 고주파변조기의 전원스위칭회로에 관한 것이다.The present invention relates to a power switching circuit of an arm modulated RF modulator, and more particularly to a power switching circuit of an arm modulated high frequency modulator to block an RF signal of an air broadcasting channel when watching a VTR. It is about.

본 발명에 의해서 1차 RF증폭부에는 항시 전원을 공급하는 조건을 만족시키면서 VTR시청시에 종래에 문제시되었던 에어방송채널의 RF신호의 유입을 완전히 차단하여 VTR시청화면이 양호히 개선되는 것이다.According to the present invention, the first RF amplifier unit satisfies the condition of supplying power at all times and completely blocks the inflow of the RF signal of the air broadcasting channel, which has been a problem at the time of VTR viewing, thereby improving the VTR viewing screen.

Description

팔방식용 고주파변조기의 전원스위칭회로Power Switching Circuit of Arm Type High Frequency Modulator

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

제2도는 본 발명에 따른 고주파변조기의 블럭구성도.2 is a block diagram of a high frequency modulator according to the present invention.

Claims (1)

안테나(ANT)로 유입된 RF신호를 부스터전압(B1+)이 인가에 의해서 1차증폭하는 1차 RF증폭부(11)와, 상기 1차 RF증폭부(11)에서 증폭된 RF신호를 VTR내부튜너와 2차 RF증폭부(13)로 각각 분배하는 분배부(12)와, 상기 분배부(12)로부터의 RF신호를 부스터전압(B1+)의 인가에 의해서 2차로 증폭하는 2차 RF증폭부(13)와, 변조전압(B2+)의 인가에 의해서 오디오/비디오 캐리어신호(Ain, Vin)를 변조하는 RF변조부(15)와, 상기 2차 RF증폭부(13)의 출력신호 또는 RF변조부915)의 출력신호를 TV세트로 출력하는 믹서(14)를 포함하는 고주파변조기에 있어서, 상기 변조시만 공급되는 변조전압(B2+)이 공급되는 동안에 부스터전압(B1+)의 공급을 차단하도록 세트를 구성하고, 상기 변조시만 공급되는 변조전압(B2+)이 공급되는 동안에 부스터전압(B1+)의 공급을 차단하도록 세트(SET)를 구성하고, 상기 부스터전압(B1+) 단자를 애노드단자에 접속하고, 그 캐쏘드단자를 1차 RF증폭부(11)에 접속한 제1다이오드(D1)를 구성하고, 상기 변조전압(B2+)이 RF변조부(15)로 공급되는 라인에 애노드단자를 접속하고, 그 캐쏘드단자를 상기 제1다이오드(D1)의 캐쏘드단자에 접속한 제2다이오드(D2)를 구성함을 특징으로 팔방식용 고주파변조기의 전원스위칭회로.The RF signal amplified by the primary RF amplifier 11 and the primary RF amplifier 11 for primary amplification by applying the booster voltage B1 + to the RF signal introduced into the antenna ANT inside the VTR. A distributor 12 for distributing to the tuner and the secondary RF amplifier 13, and a secondary RF amplifier for amplifying the RF signal from the distributor 12 secondly by applying a booster voltage B1 +. 13, an RF modulator 15 for modulating the audio / video carrier signals Ain and Vin by application of a modulation voltage B2 +, and an output signal or RF modulation of the secondary RF amplifier 13; A high frequency modulator including a mixer 14 for outputting the output signal of the unit 915 to a TV set, wherein the set is to cut off the supply of the booster voltage B1 + while the modulation voltage B2 + supplied only during the modulation is supplied. Configure the set (SET) to cut off the supply of the booster voltage (B1 +) while the modulation voltage (B2 +) supplied only during the modulation is supplied, The booster voltage B1 + terminal is connected to the anode terminal, and the cathode diode is connected to the primary RF amplifier 11 to constitute a first diode D1, and the modulation voltage B2 + is an RF modulator. An anode terminal is connected to a line supplied to (15), and a second diode (D2) connecting the cathode terminal to the cathode terminal of the first diode (D1) is configured. Power switching circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950043140A 1995-11-23 1995-11-23 Power switchting circuit of rf modulator KR100206371B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1019950043140A KR100206371B1 (en) 1995-11-23 1995-11-23 Power switchting circuit of rf modulator
GB9616733A GB2307607B (en) 1995-11-23 1996-08-09 Power switching circuit of radio frequency modulator for PAL system
DE19635228A DE19635228C2 (en) 1995-11-23 1996-08-30 High frequency modulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950043140A KR100206371B1 (en) 1995-11-23 1995-11-23 Power switchting circuit of rf modulator

Publications (2)

Publication Number Publication Date
KR970032019A true KR970032019A (en) 1997-06-26
KR100206371B1 KR100206371B1 (en) 1999-07-01

Family

ID=19435333

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950043140A KR100206371B1 (en) 1995-11-23 1995-11-23 Power switchting circuit of rf modulator

Country Status (3)

Country Link
KR (1) KR100206371B1 (en)
DE (1) DE19635228C2 (en)
GB (1) GB2307607B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100286814B1 (en) * 1999-03-22 2001-04-16 이형도 Rf modulating device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100234947B1 (en) * 1997-06-05 1999-12-15 이형도 Multi-tap high frequency modulator
JPH1169272A (en) * 1997-08-19 1999-03-09 Alps Electric Co Ltd Television signal transmitter and video equipment using the television signal transmitter
GB2361595B (en) * 2000-03-30 2004-07-21 Samsung Electro Mech Switching circuit of radio frequency module in cable set-top box
KR100649631B1 (en) * 2004-08-16 2006-11-24 엘지이노텍 주식회사 Power shut-down device for RF modulator in tuner within which RF modulator is installed

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1025552A (en) * 1971-07-16 1978-01-31 Kosaku Uchida System for coupling magnetic recording and reproducing machine with television receiver
KR960008728B1 (en) * 1992-09-30 1996-06-29 Samsung Electro Mech High frequency switching circuit of vcr
JPH06318162A (en) * 1993-05-07 1994-11-15 Fujitsu Ltd Memory device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100286814B1 (en) * 1999-03-22 2001-04-16 이형도 Rf modulating device

Also Published As

Publication number Publication date
DE19635228A1 (en) 1997-05-28
DE19635228C2 (en) 1998-08-20
KR100206371B1 (en) 1999-07-01
GB9616733D0 (en) 1996-09-25
GB2307607B (en) 2000-02-23
GB2307607A (en) 1997-05-28

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