KR950004906A - Noise reduction circuit for weak signal reception - Google Patents

Noise reduction circuit for weak signal reception Download PDF

Info

Publication number
KR950004906A
KR950004906A KR1019930013846A KR930013846A KR950004906A KR 950004906 A KR950004906 A KR 950004906A KR 1019930013846 A KR1019930013846 A KR 1019930013846A KR 930013846 A KR930013846 A KR 930013846A KR 950004906 A KR950004906 A KR 950004906A
Authority
KR
South Korea
Prior art keywords
signal
noise reduction
reduction circuit
tuner
signal output
Prior art date
Application number
KR1019930013846A
Other languages
Korean (ko)
Other versions
KR0123078B1 (en
Inventor
박주덕
Original Assignee
배순훈
대우전자 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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930013846A priority Critical patent/KR0123078B1/en
Publication of KR950004906A publication Critical patent/KR950004906A/en
Application granted granted Critical
Publication of KR0123078B1 publication Critical patent/KR0123078B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Noise Elimination (AREA)

Abstract

본 발명은 약신호 수신시 노이즈 감소회로에 관한 것이다.The present invention relates to a noise reduction circuit when receiving a weak signal.

이와 같은 본 발명은 노이즈 성분의 첨예한 신호가 순간적으로 수신될 때에 노이즈를 감소하는 노이즈 감소회로로서, 수신 안테나에서 포착하는 전파중에서 요구하는 채널의 전파를 선국하며, 선택된 신호를 일정하게 증폭하고 요구하는 선택도 특성을 얻기 위해 중간 주파수로 변환하는 튜너(10)와, 상기 튜너(10)로부터 출력되는 중간 주파수 신호를 증폭하며, 이득을 제어하여 상기 튜너(10)로부터 출력되는 신호의 세기를 일정하도록 하기 위해 상기 튜너(10)로 궤환하는 중간 주파수(IF) 증폭수단(20)과, 상기 IF 증폭수단(20)으로부터 출력되는 신호가 기설정 이상의 전압 레벨인 경우에 기설정 이하의 전압 레벨로 감소시키는 노이즈 감소회로(30)와, 상기 IF 증폭수단(20)으로부터 출력된 신호 및 노이즈 감소회로(30)를 통과한 신호를 외부로부터 입력되는 제어신호에 따라 양자 신호중에서 하나를 선택하며, 색신호 및 휘도신호로 복원하는 영상신호 처리수단(40)을 포함하는 약신호 수신시 노이즈 감소회로로 구성된다. 따라서 본 발명은 미약한 신호가 수신되는 중에 순간적으로 노이즈 성분의 첨예한 신호가 수신하더라도 사용자로 하여금 눈의 피로도를 감소해 주고 보다 고화질의 영상화면을 시청할 수 있도록 한 것이다.The present invention is a noise reduction circuit that reduces noise when a sharp signal of a noise component is momentarily received, and tunes a radio wave of a required channel among radio waves captured by a reception antenna, and amplifies and requests a selected signal constantly. A tuner 10 converting to an intermediate frequency and an intermediate frequency signal output from the tuner 10 to obtain a selectivity characteristic, and controlling the gain to control the gain to maintain a constant intensity of the signal output from the tuner 10. In order that the intermediate frequency (IF) amplifying means 20, which is fed back to the tuner 10, and the signal output from the IF amplifying means 20 are at or above a predetermined voltage level, A noise reduction circuit 30 for reducing the signal, a signal output from the IF amplifying means 20 and a signal passing through the noise reduction circuit 30 are inputted from the outside; Select one of the quantum signals in accordance with the control signal, and is at about the signal received including a color signal and the luminance signal video signal processing means 40 to restore the configuration to a noise reduction circuit. Accordingly, the present invention allows the user to reduce eye fatigue and to view a higher quality video screen even when a sharp signal of a noise component is instantaneously received while a weak signal is received.

Description

약신호 수신시 노이즈 감소회로Noise reduction circuit for weak signal reception

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

도면은 본 발명에 따른 약신호 수신시 노이즈 감소회로를 도시한 블럭도.Figure is a block diagram showing a noise reduction circuit when receiving a weak signal in accordance with the present invention.

Claims (2)

노이즈 성분의 첨예한 신호가 순간적으로 수신될 때에 노이즈를 감소하는 노이즈 감소회로로서, 수신 안테나에 포착하는 전파중에서 요구하는 채널의 전파를 선국하며, 선택된 신호를 안정하게 증폭하고 요구하는 선택도 특성을 얻기 위해 중간 주파수로 변환하는 튜너(10)와; 상기 튜너(10)로부터 출력되는 중간 주파수 신호를 증폭하며, 이득을 제어하여 상기 튜너(10)로 출력되는 신호의 세기를 일정하도록 하기 위해 상기 튜너(10)로 궤환하는 중간 주파수(IF) 증폭수단(20)과; 상기 IF 증폭수단(20)으로부터 출력되는 신호가 기설정 이상 전압 레벨의 노이즈 성분인 경우에 기설정 이하의 전압 레벨로 감소시키는 노이즈 감소회로(30)와; 상기 IF 증폭수단(20)로부터 출력된 신호 및 노이즈 감소 회로(30)를 통과한 신호를 외부로부터 입력되는 제어신호에 따라 양자 신호중에서 하나를 선택하며, 또한 색신호 및 휘도신호로 복원하는 영상신호 처리수단(40)을 포함하는 약신호 수신시 노이즈 감소회로.A noise reduction circuit that reduces noise when a sharp signal of a noise component is instantaneously received, and tunes a radio wave of a desired channel among radio waves captured by a receiving antenna, stably amplifies the selected signal, and selects selectivity characteristics. A tuner 10 for converting to an intermediate frequency to obtain; An intermediate frequency (IF) amplifying means for amplifying the intermediate frequency signal output from the tuner 10 and feeding back to the tuner 10 to control the gain so that the intensity of the signal output to the tuner 10 is constant. 20; A noise reduction circuit (30) which reduces the signal output from the IF amplifying means (20) to a voltage level equal to or less than a preset value when the signal output from the IF amplification means (20) is a noise component of a preset voltage level; Image signal processing for selecting one of the quantum signals according to a control signal input from the signal output from the IF amplifying means 20 and the signal passing through the noise reduction circuit 30 from the outside, and further restored to a color signal and a luminance signal Noise reduction circuitry upon receiving weak signal comprising means (40). 제 1 항에 있어서, 상기 노이즈 감소회로(30)는 상기 IF 증폭수단(20)으로부터 출력되는 신호가 기설정 이상의 전압 레벨인 경우에 동작하는 제너다이오드(ZD1)와, 상기 제너다이오드(ZD1)의 에노우드측에 연결된 스위칭용 N형 TR(Q1)과, 상기 TR(Q1)의 에미터에 연결된 바이어스 저항(R4)과, 상기 TR(Q1)의 컬렉터로 출력하는 노이즈 성분의 첨예한 신호를 감소하기 위해 병렬로 연결된 전압 분배용 저항(R5) 및 R6)으로 구성됨을 특징으로 하는 약신호 수신시 노이즈 감소회로.The noise reduction circuit 30 of claim 1, wherein the noise reduction circuit 30 is formed of a zener diode ZD1 and a zener diode ZD1 operated when the signal output from the IF amplifying means 20 is at a voltage level higher than or equal to a predetermined level. Switching N-type TR (Q1) connected to the anode side, bias resistor (R4) connected to the emitter of the TR (Q1), and the sharp signal of the noise component output to the collector of the TR (Q1) is reduced In order to receive the weak signal noise reduction circuit, characterized in that consisting of a voltage distribution resistor (R5) and R6) connected in parallel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930013846A 1993-07-21 1993-07-21 Circuit for decreasing noise signal when a television weak signal KR0123078B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930013846A KR0123078B1 (en) 1993-07-21 1993-07-21 Circuit for decreasing noise signal when a television weak signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930013846A KR0123078B1 (en) 1993-07-21 1993-07-21 Circuit for decreasing noise signal when a television weak signal

Publications (2)

Publication Number Publication Date
KR950004906A true KR950004906A (en) 1995-02-18
KR0123078B1 KR0123078B1 (en) 1997-11-17

Family

ID=19359754

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930013846A KR0123078B1 (en) 1993-07-21 1993-07-21 Circuit for decreasing noise signal when a television weak signal

Country Status (1)

Country Link
KR (1) KR0123078B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100464141B1 (en) * 2002-05-10 2005-01-06 주식회사 엘바이오 Biosensor
KR100564683B1 (en) * 2001-07-30 2006-03-30 마쯔시다덴기산교 가부시키가이샤 Method and apparatus for detecting physicochemical changes emitted by cell
KR20230031516A (en) * 2021-08-27 2023-03-07 고려대학교 산학협력단 Enzyme based electrode, manufacturing, and the application thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100652961B1 (en) * 2005-07-27 2006-12-01 삼성전자주식회사 Broadcasting receive apparatus for improving channel converting speed and method therof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100564683B1 (en) * 2001-07-30 2006-03-30 마쯔시다덴기산교 가부시키가이샤 Method and apparatus for detecting physicochemical changes emitted by cell
KR100464141B1 (en) * 2002-05-10 2005-01-06 주식회사 엘바이오 Biosensor
KR20230031516A (en) * 2021-08-27 2023-03-07 고려대학교 산학협력단 Enzyme based electrode, manufacturing, and the application thereof

Also Published As

Publication number Publication date
KR0123078B1 (en) 1997-11-17

Similar Documents

Publication Publication Date Title
KR100382192B1 (en) Agc circuit arrangement for a tuner
US5339452A (en) Switching diversity reception system
KR920022884A (en) Audio level equalizers for television acoustic RF signals, broadcast FM RF signals and national weather service FM RF signals
US4630117A (en) Automatic gain control system
KR950004906A (en) Noise reduction circuit for weak signal reception
US20050032495A1 (en) Automatic gain control for a tuner
US4766497A (en) IF circuit with reduced sound attenuation for cable signals
CA1090464A (en) Automatic chroma level system
KR100211620B1 (en) First if filter with fixed second half-if trap for use in an radio in a television
US3454721A (en) Transistorized agc system
US4031547A (en) Noise reducing circuit for video signals
US5325184A (en) Method of and apparatus for regulating color in a received video signal
KR100925430B1 (en) RF switch
JPH0211070B2 (en)
KR100856328B1 (en) Television tuner with signal path switching function
US3487165A (en) Video peaking control network
US5303410A (en) Signal strength meter circuit for radio receiver
KR100992954B1 (en) Tuner having RF AGC delay circuit
KR0130024B1 (en) High frequency input signal intensity adjustment circuit of tuner
KR970005703Y1 (en) Circuits for compensating distortion of character when character converts
KR960011410B1 (en) High freq. input signal control circuit for tuner
JPH04156011A (en) Reception equipment
KR930000649Y1 (en) Beat generating and saturation generating removing circuit of tv set
JPS57180216A (en) Agc circuit for television receiver
KR950030650A (en) Automatic Gain Control of HTV Receiver

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20060705

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee