KR970024921A - Video signal comparison detection circuit - Google Patents

Video signal comparison detection circuit Download PDF

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Publication number
KR970024921A
KR970024921A KR1019950033730A KR19950033730A KR970024921A KR 970024921 A KR970024921 A KR 970024921A KR 1019950033730 A KR1019950033730 A KR 1019950033730A KR 19950033730 A KR19950033730 A KR 19950033730A KR 970024921 A KR970024921 A KR 970024921A
Authority
KR
South Korea
Prior art keywords
video signal
output
circuit
detection circuit
mirror
Prior art date
Application number
KR1019950033730A
Other languages
Korean (ko)
Inventor
현윤종
Original Assignee
김광호
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950033730A priority Critical patent/KR970024921A/en
Publication of KR970024921A publication Critical patent/KR970024921A/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
    • H03K5/2409—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
    • H03K5/24—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude
    • H03K5/2472—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being amplitude using field effect transistors

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

본 발명은 저전압용 캠코더의 비디오 신호 비교 검출 회로로서, 그 구성은 제1 및 제2 아날로그 비디오 전류 신호를 각각 받아 각각에 대응하는 제1 및 제2 전류값을 갖는 신호를 출력하는 한쌍의 제1 미러 회로와, 상기 제1 및 제2 입력 신호에 대응하여 기준 전류값을 출력하는 한쌍의 제2 미러 회로와, 상기 제1 및 제2 전류와 상기 기준 전류간 차에에 대응하는 전류를 각각의 출력 전압으로 변환하여 출력하는 피크 검출 신호 출력단으로 구성된 2입력 비디오 신호 피크 검출 회로; 및 2입력 비디오 신호 피크 검출 회로의 각 출력을 받아 그 차에 대응하는 신호를 출력하는 비교 회로를 구성되며, 이들 회로들은 저전원 전압하에서 동작한다.The present invention provides a video signal comparison detection circuit of a low-voltage camcorder, the configuration of which is a pair of first receiving a first and a second analog video current signal, respectively, and outputting a signal having first and second current values corresponding thereto, respectively. A mirror circuit, a pair of second mirror circuits for outputting a reference current value corresponding to the first and second input signals, and a current corresponding to the difference between the first and second currents and the reference current, respectively. A two-input video signal peak detection circuit comprising a peak detection signal output stage for converting the output voltage to an output voltage; And a comparison circuit which receives each output of the two-input video signal peak detection circuit and outputs a signal corresponding to the difference, these circuits operating under a low power supply voltage.

Description

비디오 신호 비교 검출 회로Video signal comparison detection circuit

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

제1도는 본 발명에 따른 비디오 신호 비교 검출 회로의 구성을 도시한 회로도,1 is a circuit diagram showing the configuration of a video signal comparison detection circuit according to the present invention;

제2도는 제1도의 주요부분에 대한 신호 파형도.2 is a signal waveform diagram of the main part of FIG.

Claims (4)

제1 및 제2아날로그비디오 전류 신호를 각각 받아 각각에 대응하는 제1 및 제2전류값을 갖는 신호를 출력하는 한쌍의 제1 미러 회로와, 상기 제1 및 제2입력 신호에 대응하여 기준 전류값을 한쌍의 제2미러 회로와, 상기 제1 및 제2전류와 상기 기준 전류간 차에에 대응하는 전류를 각각의 출력 전압으로 변환하여 출력하는 피크 검출 신호 출력단으로 구성된 2입력 비디오신호 피크 검출회로; 및 상기 2입력 비디오 신호 피크 검출 회로의 각 출력을 받아 그 차에 대응하는 신호를 출력하는비교 회로를 포함하며, 상기 회로들은 저전원 전압하에서 동작되는 것을 특징으로 하는 비디오 신호 비교 검출 회로.A pair of first mirror circuits receiving the first and second analog video current signals, respectively, and outputting signals having first and second current values corresponding thereto, and a reference current corresponding to the first and second input signals; Two-input video signal peak detection comprising a pair of second mirror circuits and a peak detection signal output stage for converting and outputting a current corresponding to the difference between the first and second currents and the reference current into respective output voltages. Circuit; And a comparison circuit which receives each output of the two-input video signal peak detection circuit and outputs a signal corresponding to the difference, wherein the circuits are operated under a low power supply voltage. 제1항에 있어서, 상기 전원의 레벨은 3.5V인 것을 특징으로하는 비디오 신호 비교 검출 회로.The video signal comparison detection circuit according to claim 1, wherein the level of the power supply is 3.5V. 제1항에 있어서, 상기 피크 검출신호 출력단은 제1 및 제2트랜지스터로 구성되며, 상기 제1 미러 회로의 출력과 제2미러 회로의 출력은 동시에 상기 제1트랜지스터의 에미터에 접속되고 상기 제1트랜지스터의 콜렉터는 상기 제2트랜지스터의 베이스에 접속되며, 상기 제2트랜지스터의 에미터에는 접지간에 접속된 캐패시터를 더 포함하며, 이에 의해서 피크 검출 신호가 출력되는 것을 특징으로하는 비디오 신호 비교 검출 회로.The output of the first mirror circuit and the output of the second mirror circuit are simultaneously connected to the emitter of the first transistor and the first output of the first and second transistors. The collector of one transistor is connected to the base of the second transistor, and the emitter of the second transistor further includes a capacitor connected between grounds, whereby a peak detection signal is output, whereby the video signal comparison detection circuit . 제1항에 있어서, 상기 제1미러 회로는 바이폴라트랜지스터 및 이에 연결된 M0S트랜지스터로구성되며, 상기 제2미러는 바이폴라 트랜지스터로 구성된 것을 특징으로하는 비디오 신호 비교 검출회로.The video signal comparison detection circuit of claim 1, wherein the first mirror circuit comprises a bipolar transistor and a M0S transistor connected thereto, and the second mirror comprises a bipolar transistor. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950033730A 1995-10-02 1995-10-02 Video signal comparison detection circuit KR970024921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950033730A KR970024921A (en) 1995-10-02 1995-10-02 Video signal comparison detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950033730A KR970024921A (en) 1995-10-02 1995-10-02 Video signal comparison detection circuit

Publications (1)

Publication Number Publication Date
KR970024921A true KR970024921A (en) 1997-05-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950033730A KR970024921A (en) 1995-10-02 1995-10-02 Video signal comparison detection circuit

Country Status (1)

Country Link
KR (1) KR970024921A (en)

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