KR940013178A - Frequency selection circuit - Google Patents

Frequency selection circuit Download PDF

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Publication number
KR940013178A
KR940013178A KR1019920021866A KR920021866A KR940013178A KR 940013178 A KR940013178 A KR 940013178A KR 1019920021866 A KR1019920021866 A KR 1019920021866A KR 920021866 A KR920021866 A KR 920021866A KR 940013178 A KR940013178 A KR 940013178A
Authority
KR
South Korea
Prior art keywords
output
comparator
frequency
level
logic
Prior art date
Application number
KR1019920021866A
Other languages
Korean (ko)
Other versions
KR950010889B1 (en
Inventor
이상영
Original Assignee
정용문
삼성전자 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 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019920021866A priority Critical patent/KR950010889B1/en
Publication of KR940013178A publication Critical patent/KR940013178A/en
Application granted granted Critical
Publication of KR950010889B1 publication Critical patent/KR950010889B1/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
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components
    • H03K19/1733—Controllable logic circuits
    • H03K19/1737—Controllable logic circuits using multiplexers
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/036—Radio; TV

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Details Of Television Scanning (AREA)
  • Electronic Switches (AREA)

Abstract

이 발명은 모니터에서 해상도를 높이기 위해 추가되는 수평주파수를 트랜지스터를 이용하여 2원하는 주파수를 정확하게 선택하도록 된 주파수 선택회로에 관한 것으로서, 수평 및 수직주파수를 입력받아 출력로직이 변화되는 게이트회로와, 이 게이트회로에서 출력되는 수평주파수를 전압레벨로 변환시키는 주파수 전압변환기와, 주파수 전압변환기에서 출력되는 전압을 기준레벨과 비교하여 출력을 발생하는 비교기와, 이 비교기의 출력에 의해 스위칭되는 아날로그스위치와, 상기 비교기의 출력레벨에 의해 셀렉트단의 출력로직이 선택되는 4채널 아날로그 멀티플렉서를 구비한 기준의 회로에, 병렬2단의 비교기를 이용하여 상기 비교기의 출력측에 연결되어 상기 비교기의 출력레벨과 기준레벨을 각기 비교한 출력을 발생하고, 이 비교기들의 출력로직에 따라 스위치이되어 주파수를 셀렉트하도록 레벨을 결정하도록 트랜지스터들을 설치하였다.The present invention relates to a frequency selection circuit that accurately selects two desired frequencies by using a transistor as a horizontal frequency added to increase the resolution in a monitor, and includes a gate circuit in which output logic is changed by receiving horizontal and vertical frequencies. A frequency voltage converter for converting the horizontal frequency output from the gate circuit into a voltage level, a comparator for generating an output by comparing the voltage output from the frequency voltage converter with a reference level, an analog switch switched by the output of the comparator; A reference circuit having a four-channel analog multiplexer in which the output logic of the select stage is selected by the output level of the comparator is connected to the output side of the comparator using a parallel two-stage comparator, so that the output level and the reference level of the comparator are Produces outputs that compare Seuwichiyi is in accordance with the logic was provided a transistor to determine a level so as to select the frequency.

Description

주파수 선택회로Frequency selection circuit

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

제2도는 이 발명에 따른 주파수 선택회로도이다.2 is a frequency selection circuit diagram according to the present invention.

Claims (1)

수평 및 수직 주파수를 입력받아 출력로직이 변화되는 게이트회로와, 이 게이트회로에서 출력되는 수평주파수를 전압레벨로 변환시키는 주파수 전압변환기와, 주파수 전압변환기에서 출력되는 전압을 기준레벨과 비교하여 출력을 발생하는 비교기와, 이 비교기의 출력에 의해 스위칭되는 아날로그스위치와, 상기 비교기의 출력레벨에 의해 셀렉트단의 출력로직이 선택되는 4채널 아날로그 멀티플렉서를 구비한 회로에 있어서, 상기 비교기(U1)의 출력측에 연결되어 상기 비교기(U1)의 출력레벨과 기준 레벨을 각기 비교한 출력을 발생하는 병렬 2단의 비교기(U2), (U3)들과, 이 비교기(U2), (U3)들의 출력로직에 따라 스위칭되어 주파수를 셀렉트하는 트랜지스터(Q1), (Q2)들을 포함하여서 된 주파수 선택회로.A gate circuit that receives horizontal and vertical frequencies and whose output logic changes, a frequency voltage converter for converting the horizontal frequency output from the gate circuit to a voltage level, and compares the voltage output from the frequency voltage converter with a reference level. A circuit comprising a generated comparator, an analog switch switched by the output of the comparator, and a four-channel analog multiplexer in which the output logic of the select stage is selected by the output level of the comparator, the output side of the comparator U1. A parallel two-stage comparator U2, U3 connected to the output logic of the comparator U1 and a reference level, respectively, to the output logic of the comparators U2, U3. And a transistor (Q1) and (Q2) for switching accordingly to select a frequency. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920021866A 1992-11-20 1992-11-20 Frequency selecting circuit KR950010889B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920021866A KR950010889B1 (en) 1992-11-20 1992-11-20 Frequency selecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920021866A KR950010889B1 (en) 1992-11-20 1992-11-20 Frequency selecting circuit

Publications (2)

Publication Number Publication Date
KR940013178A true KR940013178A (en) 1994-06-25
KR950010889B1 KR950010889B1 (en) 1995-09-25

Family

ID=19343511

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920021866A KR950010889B1 (en) 1992-11-20 1992-11-20 Frequency selecting circuit

Country Status (1)

Country Link
KR (1) KR950010889B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100730006B1 (en) * 1998-08-07 2007-06-20 톰슨 콘슈머 일렉트로닉스, 인코포레이티드 Control of horizontal frequency selection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100730006B1 (en) * 1998-08-07 2007-06-20 톰슨 콘슈머 일렉트로닉스, 인코포레이티드 Control of horizontal frequency selection

Also Published As

Publication number Publication date
KR950010889B1 (en) 1995-09-25

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