KR880002321A - 필터회로의 시정수 자동조정회로 - Google Patents

필터회로의 시정수 자동조정회로 Download PDF

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Publication number
KR880002321A
KR880002321A KR1019870007714A KR870007714A KR880002321A KR 880002321 A KR880002321 A KR 880002321A KR 1019870007714 A KR1019870007714 A KR 1019870007714A KR 870007714 A KR870007714 A KR 870007714A KR 880002321 A KR880002321 A KR 880002321A
Authority
KR
South Korea
Prior art keywords
time constant
circuit
filter circuit
filter
adjustment circuit
Prior art date
Application number
KR1019870007714A
Other languages
English (en)
Other versions
KR900002955B1 (ko
Inventor
미츠모 가와노
Original Assignee
아오이 죠이치
가부시키가이샤 도시바
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 아오이 죠이치, 가부시키가이샤 도시바 filed Critical 아오이 죠이치
Publication of KR880002321A publication Critical patent/KR880002321A/ko
Application granted granted Critical
Publication of KR900002955B1 publication Critical patent/KR900002955B1/ko

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • 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
    • H03L7/0805—Details of the phase-locked loop the loop being adapted to provide an additional control signal for use outside the loop
    • 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
    • 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
    • H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop

Abstract

내용 없음

Description

필터회로의 시정수 자동조정회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명에 따른 필터회로의 시정수자동조정회로에 대한 1실시예를 나타내는 블럭회로도.
제 2 도는 본 발명을 비디오테이프레코더의 색신호처리 회로에 사용되는 대역통과필터에 적용시킨 경우의 회로구성을 나타내는 블럭회로도.
제 3 도는 본 발명을 전류변환수단을 이용한 저역통과필터에 적용시킨 경우의 회로구성을 나타내는 회로도.

Claims (4)

  1. 발진신호(fc)를 생성해 내는 발진기(OSC)와, 상기 발진신호(fc)를 기준주파수신호(fs)와 위상 또는 주파수비교하여 그 차이를 검출하므로써 피제어필터회로의 시정수를 자동조정해 주는 제어신호전압(Vc)을 발생해 내는 검출회로(14)를 구비한 것을 특징으로 하는 필터회로의 시정수자동조정회로.
  2. 제 1 항에 있어서, 발진기(OSC)는 시정수가변대역통과필터회로(11)와 이 시정수가변대역통과필터(11)에 정궤환신호를 인가해 주는 리미터증폭기(13)로 구성된 것을 특징으로 하는 필터회로의 시정수자동조정회로.
  3. 제 2 항에 있어서, 시정수가변대역통과필터(11)는 피제어필터회로와 동일형식의 필터회로에 의해 구성되고, 그 시정수가 제어신호전압(Vc)에 의해 자동조정되는 것을 특징으로 하는 필터회로의 시정수자동조정회로.
  4. 제 1 항에 있어서, 검출회로(14)는 위상비교기(142)와 주파수편이변별기(143) 및 이들의 출력신호를 가산하게 되는 가산기(144)로 구성된 것을 특징으로 하는 필터회로의 시정수자동조정회로.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870007714A 1986-07-18 1987-07-16 필터회로의 시정수 자동조정회로 KR900002955B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP169234 1986-07-18
JP61169234A JPH0787332B2 (ja) 1986-07-18 1986-07-18 フイルタ回路の時定数自動調整回路
JP86-169234 1986-07-18

Publications (2)

Publication Number Publication Date
KR880002321A true KR880002321A (ko) 1988-04-30
KR900002955B1 KR900002955B1 (ko) 1990-05-03

Family

ID=15882718

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870007714A KR900002955B1 (ko) 1986-07-18 1987-07-16 필터회로의 시정수 자동조정회로

Country Status (5)

Country Link
US (1) US4818903A (ko)
JP (1) JPH0787332B2 (ko)
KR (1) KR900002955B1 (ko)
DE (1) DE3723778A1 (ko)
GB (1) GB2194402B (ko)

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Also Published As

Publication number Publication date
DE3723778A1 (de) 1988-01-28
DE3723778C2 (ko) 1992-03-26
KR900002955B1 (ko) 1990-05-03
US4818903A (en) 1989-04-04
GB8716902D0 (en) 1987-08-26
JPS6326111A (ja) 1988-02-03
JPH0787332B2 (ja) 1995-09-20
GB2194402A (en) 1988-03-02
GB2194402B (en) 1991-03-06

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