[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

KR950012039B1 - Slicer circuit which prevents static electricity and impulse noise - Google Patents

Slicer circuit which prevents static electricity and impulse noise Download PDF

Info

Publication number
KR950012039B1
KR950012039B1 KR1019900002540A KR900002540A KR950012039B1 KR 950012039 B1 KR950012039 B1 KR 950012039B1 KR 1019900002540 A KR1019900002540 A KR 1019900002540A KR 900002540 A KR900002540 A KR 900002540A KR 950012039 B1 KR950012039 B1 KR 950012039B1
Authority
KR
South Korea
Prior art keywords
circuit
high frequency
capacitor
zener diode
integrated circuit
Prior art date
Application number
KR1019900002540A
Other languages
Korean (ko)
Other versions
KR910016136A (en
Inventor
이종진
Original Assignee
삼성전기주식회사
서주인
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 삼성전기주식회사, 서주인 filed Critical 삼성전기주식회사
Priority to KR1019900002540A priority Critical patent/KR950012039B1/en
Publication of KR910016136A publication Critical patent/KR910016136A/en
Application granted granted Critical
Publication of KR950012039B1 publication Critical patent/KR950012039B1/en

Links

Images

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03GCONTROL OF AMPLIFICATION
    • H03G11/00Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/06Limiters of angle-modulated signals; such limiters combined with discriminators
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03GCONTROL OF AMPLIFICATION
    • H03G11/00Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The device prevents the RF integrated circuit from the electromagnetic wave and the impact noise by adopting slicer circuit. The slicer circuit is composed of: a capacitor which protects the RF modulation integrated circuit and peripherals from the environmental conditions; a zener diode which prevents the high frequency voltage caused by the breakdown effect due to the increament of the reverse voltage; and a ferromagnetic ferrite core which protects the circuits from the high frequency components.

Description

정전기 및 충격성 노이즈 방지용 슬라이서 회로Slicer circuit for preventing static and impact noise

제1도는 종래의 회로도.1 is a conventional circuit diagram.

제2도는 본 발명의 슬라이서 회로도.2 is a slicer circuit diagram of the present invention.

제3도는 본 발명의 슬라이서 회로에 의한 입출력 파형도 및 그 특성도.3 is an input / output waveform diagram and its characteristic diagram by the slicer circuit of the present invention.

*도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of drawing

1 : 비디오 또는 오디오 신호 입력단 2 : 페라이트 코어1: Video or audio signal input 2: Ferrite core

10 : RF 변조집적회로 20 : 슬라이서 회로10: RF modulation integrated circuit 20: slicer circuit

D : 제너다이오드 C1-C3: 캐패시터D: Zener Diodes C 1- C 3 : Capacitors

본 발명은 회로의 주변조건, 예를 들면 정전기 및 충격성 노이즈 등에 미치는 악영향을 방지하기위한 슬라이서(Slicer)회로에 관한 것으로, 특히 각종 가전제품에서 비디오 신호 입력단으로 유입되는 정전기 및 충격성 노이즈에 의해서 RF 변조기용 집적회로가 파괴되는 것을 방지하기 위한 슬라이서 회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slicer circuit for preventing adverse effects on the circuit's ambient conditions, for example, static electricity and impact noise. In particular, RF modulation is performed by electrostatic and impact noise introduced into a video signal input terminal in various home appliances. The present invention relates to a slicer circuit for preventing an integrated circuit from being destroyed.

일반적으로, RF 신호수신기에 있어서 조작자나 듣는 사람이 수신하고자 하는 RF 신호의 반송주파수나 중심주파수에 가장 가깝게 수신기를 동조시킬 때 가장 좋은 음질 및 화질의 출력신호가 된다.In general, when an operator or a listener tunes a receiver closest to a carrier frequency or a center frequency of an RF signal to be received in an RF signal receiver, an output signal having the best sound quality and image quality is obtained.

예를들어 방송신호를 수신할 때 선택국이나 채널의 중심주파수에 조금이라도 빗나가게 주파수 동조를 시키게 되면 TV나 오디오 출력단에 원치않는 상당한 노이즈가 발생하게 된다.For example, when receiving a broadcast signal, frequency tuning that slightly deviates from the center frequency of the selected station or channel will result in unwanted unwanted noise on the TV or audio output.

그리고, 최근의 VRT이나 TV에는 소정채널의 RF파(VHF 또는 UHF)를 바이오 신호로 진폭 변조하는 진폭변조회로가 내장되어 있다.Recently, VRTs and TVs have built-in amplitude modulation circuits for amplitude-modulating RF waves (VHF or UHF) of predetermined channels into bio signals.

이러한 변조회로는 변조회로의 비대칭성이나, 클램핑 회로에서이 직류오프셀 또는 공급전원, 온도의 순간변화, 각종 충격성 노이즈 및 정전기등에 의해 그 동작이 저해를 받는다.Such a modulation circuit is hampered by the asymmetry of the modulation circuit, the DC off-cell or the power supply in the clamping circuit, the instantaneous change in temperature, various impact noises and static electricity.

이와같은 각종 저해요소들이 제1도의 종래 비디오 입력단에 그대로 입력되어 RF 변조집적회로(10)에 유입되므로 이 RF 변조집적회로(10)가 오동작을 하거나 심한 경우 파괴되는 등의 문제점이 있었다.Since such various inhibitory elements are directly input to the conventional video input terminal of FIG. 1 and flow into the RF modulation integrated circuit 10, the RF modulation integrated circuit 10 may malfunction or be destroyed in severe cases.

본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로, 비디오 신호나 오디오 신호 입력단으로 유입되는 충격성 노이즈 및 정전기로 부터 RF 변조집적회로 및 그 주변회로를 보호하여 안정화시키는 라이서 회로를 제공함에 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a riser circuit that protects and stabilizes an RF modulation integrated circuit and its peripheral circuits from shock noise and static electricity flowing into a video signal or audio signal input terminal.

상기한 본 발명의 목적을 달성하기 위해, 기술적 수단은, RF 변조집적회로와 그 주변회로를 보호하고 안정화 시키기 위하여 고유전율계의 캐패시터와 제너다이오드의 아발란쉬브레이크다운(Avalanche Breakdown)효과를 이용했고, 정전기나 제너다이오드를 통과하면서 주위의 타부품으로 유도되는 것을 방지하기 위하여 페라리트 코어(Ferrite Core)를 구비함을 특징으로 한다.In order to achieve the above object of the present invention, the technical means, using the Avalanche Breakdown effect of the capacitor and Zener diode of the high dielectric constant to protect and stabilize the RF modulation integrated circuit and its peripheral circuits It is characterized in that it is provided with a ferrite core (Ferrite Core) to prevent the static electricity or zener diode to be guided to other parts around.

이하 첨부된 도면을 참조하여 본 발명의 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

제2도는 본 발명이 슬라이서 회로 구성도로서, 오디오 신호 또는 비디오 신호 입력단(1)에 고유전율계의 캐패시터(C3)와 전해 캐패시터(C1)가 연결되고, 상기 캐패시터(C3)에 아발란쉬 브레이크 다운 제너다이오드(D)와 페라이트 코어(2)가 직렬로 연결된 슬라이서 회로(20)를 구성하며, 상기 캐패시터(C1)에 저항(R1-R3)을 통하여 RF 변조집적 회로(19)가 연결된다.2 is a schematic diagram of a slicer circuit according to an embodiment of the present invention, in which an audio signal or a video signal input terminal 1 is connected with a capacitor C3 and an electrolytic capacitor C1 of a high dielectric constant, and an avalanche brake is applied to the capacitor C3. The down zener diode D and the ferrite core 2 constitute a slicer circuit 20 connected in series, and an RF modulation integrated circuit 19 is connected to the capacitor C1 through resistors R1-R3.

이하 제3도를 참조하여 이들의 작용효과를 설명한다.Hereinafter, with reference to Figure 3 will be described the operation and effect thereof.

(a)도와 같은 슬라이서 회로(20)의 입력측(Vi)에 (b)도와 같은 충격성 펄스신호나 정전기 신호가 입력되면, 이 신호는 콘덴서(C3)에 입력되며, 이 콘덴서(C3)는 고주파 신호(상기 충격성 펄스신호나 정전기 신호)에 적합한 고유전율을 갖는 콘덴서이다.When an impulsive pulse signal or an electrostatic signal such as (b) is input to the input side Vi of the slicer circuit 20 as shown in (a), this signal is input to the capacitor C3, which is a high frequency signal. It is a capacitor having a high dielectric constant suitable for (impact pulse signal or electrostatic signal).

상기 콘덴서(C3)를 통과한 고주파 신호는 제너다이오드(D)에 인가되고, 이 제너다이오드 (D)에 의해서 제너 전압(Vz)이 상의 주파수 신호에 대해서는 컷팅된다.The high frequency signal passing through the capacitor C3 is applied to the zener diode D, and the zener diode D is cut for the frequency signal above the zener voltage Vz.

상기 제너다이오드(D)는 실리콘을 사용한 PN 접합다이오드로 역방향 특성에 있어서, 입력전압이 낮은 곳에서는 관계없이 극히 적은 일정한 표화전류가 흐르지만, 역방향 전압이 급격하게 증가하면 브레이크 다운현상을 일으켜 제너전압(VE)보다 높은 전압을 컷팅하게 된다.The zener diode (D) is a PN junction diode using silicon. In the reverse characteristics, very little constant current flows regardless of the low input voltage. However, if the reverse voltage increases rapidly, a zener voltage may occur. It will cut the voltage higher than (VE).

상기 제너다이오드(D)를 통과한 신호는 상당히 높은 고주파수를 갖고 있기 때문에 이 고주파수에 의하여 그 주변회로에 악영향을 미치게 된다.Since the signal passing through the zener diode D has a very high frequency, the high frequency adversely affects the peripheral circuit.

따라서, 철이 산화물을 주체로 하여 페리 자성을 나타내는 강자성 재료의 페라이트 코어(2)를 사용하여 상기 제너다이오드(D)를 통과한 고주파 신호를 감쇄시켜 준다.Therefore, the ferrite core 2 made of ferromagnetic material exhibiting ferri magnetism mainly using iron as a main material attenuates the high frequency signal passed through the zener diode D.

이와같이 동작되어 슬라이서 회로(20)의 출력파형은 (c)도와 같이 제너전압 상의 고주파 전압은 컷팅되고, 그 전달특성은 (d)도에 도시된 바와 같이 나타난다.In this way, the output waveform of the slicer circuit 20 is cut as shown in (c), and the high frequency voltage on the zener voltage is cut, and the transfer characteristics thereof are shown in (d).

상기한 출력파형(C)이 제2도의 전해 콘덴서(C1)이 제2도이 전해 콘덴서(C1)와 저항(R1-R3)을 통하여 RF 변조집적회로(10)에 인가된다.The above-described output waveform C is applied to the RF modulation integrated circuit 10 through the electrolytic capacitor C1 of FIG. 2 through the electrolytic capacitor C1 and resistors R1-R3 of FIG.

따라서, 입력단으로 유입된 충격성 노이즈 및 정전기로 부터 RF 변조집적회로를 보호하고 그 주변회로를 안정화시켜주는 뛰어난 효과가 있다.Therefore, there is an excellent effect of protecting the RF modulation integrated circuit from the impact noise and static electricity flowing into the input terminal and to stabilize the peripheral circuit.

그러므로, 입력단으로 유입된 충격성 노이즈 및 정전기로부터 RF 변조집적회로를 보호하고 그 주변회로를 안정화시켜주는 뛰어난 효과가 있다.Therefore, there is an excellent effect of protecting the RF modulation integrated circuit from the shock noise and static electricity introduced into the input stage and stabilizing the peripheral circuit.

Claims (1)

회로의 주변조건으로부터 RF 변조집적회로와 그 주변회로를 보호하고 안정화시키기 위하여 고유전율계의 캐패시터와 상기 캐패시터를 통해 급격하게 흐르는 고주파전압에 의하여 역방향전압이 급격히 증가하여 브레이크다운 현상으로 상기 고주파전압을 컷팅해주는 제너다이오드와 상기 제너다이오드를 통과한 고주파에 의한 주변회로의 악영향을 방지하기 위하여 강자성 재료의 페라이트코어를 구비하여 안정된 출력신호를 얻도록 하는 슬라이서회로.In order to protect and stabilize the RF modulation integrated circuit and its peripheral circuits from the surrounding conditions of the circuit, the reverse voltage is rapidly increased by the high frequency voltage flowing rapidly through the capacitor of the high dielectric constant meter and the capacitor and breaks down the high frequency voltage. A slicer circuit having a ferrite core made of ferromagnetic material to obtain a stable output signal in order to prevent adverse effects of a Zener diode for cutting and a peripheral circuit caused by a high frequency passing through the Zener diode.
KR1019900002540A 1990-02-27 1990-02-27 Slicer circuit which prevents static electricity and impulse noise KR950012039B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900002540A KR950012039B1 (en) 1990-02-27 1990-02-27 Slicer circuit which prevents static electricity and impulse noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900002540A KR950012039B1 (en) 1990-02-27 1990-02-27 Slicer circuit which prevents static electricity and impulse noise

Publications (2)

Publication Number Publication Date
KR910016136A KR910016136A (en) 1991-09-30
KR950012039B1 true KR950012039B1 (en) 1995-10-13

Family

ID=19296490

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900002540A KR950012039B1 (en) 1990-02-27 1990-02-27 Slicer circuit which prevents static electricity and impulse noise

Country Status (1)

Country Link
KR (1) KR950012039B1 (en)

Also Published As

Publication number Publication date
KR910016136A (en) 1991-09-30

Similar Documents

Publication Publication Date Title
US5390345A (en) Method for preventing desensitization and radio interference of radio receivers
US4601062A (en) Tracking image frequency trap
KR920022884A (en) Audio level equalizers for television acoustic RF signals, broadcast FM RF signals and national weather service FM RF signals
KR950012039B1 (en) Slicer circuit which prevents static electricity and impulse noise
US4894720A (en) Circuit for selectively outputting high frequency signals
US4694500A (en) Control voltage generating circuit for activating a noise reduction circuit in an FM stereo receiver
US3939428A (en) Receiver with automatic pass band control
KR930004134B1 (en) Doubly-balanced mixer termination
US3243708A (en) Vehicular radio receiver for both amplitude and frequency modulation reception
US4313218A (en) Extended AGC for a radio receiver
RU2147391C1 (en) Local oscillator noise suppression circuit
KR830000204B1 (en) Intercarrier voice system
CN101049023B (en) Data receiving circuit with current mirror and data slicer
US2894132A (en) Second detector circuit
US5426394A (en) Sound intermediate frequency amplifier for a broadcast receiver
EP0736966B1 (en) FM demodulator
FI83006B (en) BANDAVHAENGIGT INKOPPLINGSBAR VHF-BLANDARKOPPLINGSANORDNING.
JP3299859B2 (en) RF modulator
US3458818A (en) Circuit arrangement for the automatic gain control of an electric signal
US4352207A (en) Noise suppression circuit
KR890007396Y1 (en) Electronic tuner
KR960011410B1 (en) High freq. input signal control circuit for tuner
JP3693810B2 (en) Electronic tuner
US3458820A (en) Receiving apparatus
KR0116286Y1 (en) Electronic switch circuit in high frequency modulator

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 19990930

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee