KR970019619A - Screen interference prevention circuit of 2-wire door vision - Google Patents

Screen interference prevention circuit of 2-wire door vision Download PDF

Info

Publication number
KR970019619A
KR970019619A KR1019950030824A KR19950030824A KR970019619A KR 970019619 A KR970019619 A KR 970019619A KR 1019950030824 A KR1019950030824 A KR 1019950030824A KR 19950030824 A KR19950030824 A KR 19950030824A KR 970019619 A KR970019619 A KR 970019619A
Authority
KR
South Korea
Prior art keywords
amplifier
door vision
vision
signal
voice signal
Prior art date
Application number
KR1019950030824A
Other languages
Korean (ko)
Inventor
최재진
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 KR1019950030824A priority Critical patent/KR970019619A/en
Publication of KR970019619A publication Critical patent/KR970019619A/en

Links

Landscapes

  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

본 발명은 도어비젼(DOOR VISION)에 관한 것으로, 특히 2선식 도어비전에서 음성 통화시 증폭이에서 전류를 과소비하여 부하가 변동하는 관계로 발생되는 모니터회로로 제공되는 전원의 변동을 방지하도록하는 2선식 도어비전의 화면간섭 방지회로에 관한 것이다.The present invention relates to a door vision (DOOR VISION), in particular, in a two-wire door vision to prevent the fluctuation of power provided to the monitor circuit generated due to the load fluctuations due to excessive consumption of current in the amplification during voice call 2 It relates to a screen interference prevention circuit of a wire door vision.

본 발명은 전원과 영상 및 음성을 통합하여 전송 및 공급하는 2선식 도어비젼에서, 음성통화가 이루어지는 순간에 음성증폭을 위한 증폭기에서 전류를 과소비하여 부하가 변동하는 관계로 발생되는 모니터회로로 제공되는 전원의 변동을 효과적으로 방지하도록 하는 발명이다.The present invention provides a two-wire door vision that integrates and transmits and supplies power and video and audio, and is provided as a monitor circuit generated by a load fluctuation due to excessive consumption of current in an amplifier for amplifying voice at the moment of a voice call. The present invention effectively prevents fluctuations in power supply.

Description

2선식 도어비젼의 화면간섭 방지회로Screen interference prevention circuit of 2-wire door vision

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

제3도는 본 발명에 따른 도어비젼에 포함되는 실외기의 블록회로도.3 is a block circuit diagram of an outdoor unit included in a door vision according to the present invention.

Claims (1)

도어비젼의 통합라인을 통하여 전송되는 전원을 정류하여 각 불록에 공급하기 위한 브리지다이오드(21)와, 상기 브리지다이오드(21)를 통한 음성신호에 포함된 노이즈가 필터링된 음성신호를 출력하는 필터(22)와, 상기 필터(22)를 토한 음성신호를 소정의 레벨로 증폭하는 RF증폭부(23)와 상기 RF증폭부(23)로부터의 음성신호를 검파하는 검파부(24)와, 상기 검파부(24)로부터의 음성신호를 증폭하여 스피커(SP)로 출력하는 증폭부(25)와, 실외 마이크(MIC)로부터의 음성신호를 증폭하는 증폭부(26)와, 상기 증폭부(26)로부터의 음성신호에 의해 발진하는 발진부(27)와, 실외카메라(CA)로부터의 영상신호를 증폭하는 영상증폭부(28)와, 상기 영상증폭부(28)의 영상신호와 상기 발진부(27)의 음성신호를 혼합하여 도어비젼의 통합라인에 실어주는 믹서(29)를 포함하는 2선식 도어비젼의 화면간섭 방지회로에 있어서, 상기 브리지다이오드(21)에서 IR-LED로의 라인상에 임피던스에 의해 전력전달특성을 개선시키도록된 임피던스버퍼부(31)를 개재시키고, 상기 임피던스버퍼부(31)의 출력전압에 따라 상기 IR-LED로 제공되는 전류를 바이패스시키도록한 바이패스회로부를 구비함을 특징으로하는 2선식 도어비젼의 화면간섭 방지회로.A filter for rectifying the power transmitted through the integrated line of the door vision and supplying the blocks to each block, and a filter for outputting a voice signal filtered with noise contained in the voice signal through the bridge diode 21 ( 22), an RF amplifier 23 for amplifying the voice signal sputtering the filter 22 to a predetermined level, a detector 24 for detecting the voice signal from the RF amplifier 23, and the detection An amplifier 25 which amplifies the audio signal from the unit 24 and outputs it to the speaker SP, an amplifier 26 which amplifies the audio signal from the outdoor microphone MIC, and the amplifier 26 An oscillator 27 oscillating by an audio signal from the video signal, an image amplifier 28 for amplifying a video signal from an outdoor camera CA, an image signal of the video amplifier 28, and the oscillator 27 Two-wire type including a mixer 29 for mixing the voice signal of the car and put it on the integrated line of the door vision In the screen vision prevention circuit of the door vision, an impedance buffer unit 31 is provided on the line from the bridge diode 21 to the IR-LED to improve power transfer characteristics by impedance. And a bypass circuit unit configured to bypass the current provided to the IR-LED according to the output voltage of 31). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950030824A 1995-09-19 1995-09-19 Screen interference prevention circuit of 2-wire door vision KR970019619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950030824A KR970019619A (en) 1995-09-19 1995-09-19 Screen interference prevention circuit of 2-wire door vision

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950030824A KR970019619A (en) 1995-09-19 1995-09-19 Screen interference prevention circuit of 2-wire door vision

Publications (1)

Publication Number Publication Date
KR970019619A true KR970019619A (en) 1997-04-30

Family

ID=66615302

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950030824A KR970019619A (en) 1995-09-19 1995-09-19 Screen interference prevention circuit of 2-wire door vision

Country Status (1)

Country Link
KR (1) KR970019619A (en)

Similar Documents

Publication Publication Date Title
US20030016838A1 (en) Optical microphone systems and method of operating same
TW200419816A (en) Optical signal receiving circuit and optical signal receiving semiconductor device
KR970019619A (en) Screen interference prevention circuit of 2-wire door vision
JPH1062457A (en) Battery alarm circuit
KR100313358B1 (en) Aaaaa
JP4515431B2 (en) 4-wire video phone
KR100271666B1 (en) Voice sound outputing apparatus
KR960020292A (en) On-Board Ring Generator
KR100724593B1 (en) Video Phone of four lines way
KR890013937A (en) Still image transmission device
KR900007558Y1 (en) Apparatus for muting speakers's output signal
KR950002766Y1 (en) Echo noise preventing circuit of audio set
KR960003219A (en) Phone with Ringer Removed
KR970002691B1 (en) Message counting device
KR980007416A (en) Video phone with the features of a standard telephone
KR0138589B1 (en) Key-phone
KR970050925A (en) Tele-Val's automatic voice mute
JPS62227249A (en) Door phone circuit
KR960030653A (en) Howling prevention of camcorder
KR950005046A (en) 2-wire video door phone device
KR940005231Y1 (en) Paging system for cordless telephone
JPH08214347A (en) Telephone system
KR920020890A (en) Dial tone circuit of telephone
KR960028332A (en) TV's automatic volume control
FR2838255B1 (en) INTEGRATED CIRCUIT WITH SPECIFIC APPLICATION FOR LOW-PASS FILTERING DEVICE FOR DECOUPLING OF XDSL CHANNELS

Legal Events

Date Code Title Description
N231 Notification of change of applicant
WITN Withdrawal due to no request for examination