KR960016572A - Transmission frequency stabilization circuit for cable television - Google Patents

Transmission frequency stabilization circuit for cable television Download PDF

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Publication number
KR960016572A
KR960016572A KR1019940028010A KR19940028010A KR960016572A KR 960016572 A KR960016572 A KR 960016572A KR 1019940028010 A KR1019940028010 A KR 1019940028010A KR 19940028010 A KR19940028010 A KR 19940028010A KR 960016572 A KR960016572 A KR 960016572A
Authority
KR
South Korea
Prior art keywords
transmission
receiving
data
outputting
attenuator
Prior art date
Application number
KR1019940028010A
Other languages
Korean (ko)
Other versions
KR0131966B1 (en
Inventor
김종운
Original Assignee
이종수
엘지전자부품 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 이종수, 엘지전자부품 주식회사 filed Critical 이종수
Priority to KR1019940028010A priority Critical patent/KR0131966B1/en
Publication of KR960016572A publication Critical patent/KR960016572A/en
Application granted granted Critical
Publication of KR0131966B1 publication Critical patent/KR0131966B1/en

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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
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable

Abstract

본원 발명은 입력된 송신데이타를 직접 송시주파수에 변조를 걸어서 송신주파수를 안정화시키는 케이블 텔레비전용 송신주파수 안정화회로에 관한 것으로서, 마이컴으로 부터 입력되는 수신제어데이타(DATA,RX ENABLE,CLOCK)에 따라 동조 및 발진을 수행하여 원하는 채널을 수신하는 수신부와, 송신데이타(TXDATA)의 레벨을 감쇠시켜 출력하는 감쇠기와, 상기 마이컴으로 부터 출력되는 송신제어데이타(DATA, RX ENABLE,CLOCK)를 입력받는 동시에 상기 감쇠기의 출력신호를 입력받아 동조 및 발진을 수행하여 원하는 채널을 송신하는 송신수와, 상기 송신부 및 감쇠기에 연결되어 송신하는 경우에만 온(ON)시키는 송신스위치와, 상기 송신수부의 출력을 원하는 레벨로 증폭하는 송신증폭기로 구성되어 전원 및 온도변화에 안정하고 각기 다른 채널로 쌍방향통신이 가능한 것을 특징으로 한다.The present invention relates to a transmission frequency stabilization circuit for cable television that modulates an input transmission data directly to a transmission frequency to stabilize the transmission frequency, and tunes according to reception control data (DATA, RX ENABLE, CLOCK) input from a microcomputer. And a receiving unit receiving oscillation and receiving a desired channel, an attenuator for attenuating and outputting a level of the transmission data TXDATA, and transmission control data DATA, RX ENABLE, and CLOCK output from the microcomputer. The number of transmissions for receiving the output signal of the attenuator and performing tuning and oscillation to transmit a desired channel, a transmission switch that is ON only when connected to the transmission unit and the attenuator, and a desired level for the output of the transmission unit. It is composed of a transmission amplifier which amplifies the signal. It is stable to power and temperature change, and two-way communication is possible through different channels. And that the feature.

Description

케이블 텔레비젼용 송신주파수 안정화회로Transmission frequency stabilization circuit for cable television

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

제2도는 본원 발명에 의한 블럭도.2 is a block diagram according to the present invention.

Claims (3)

마이컴으로 부터 입력되는 수신제어데이타(DATA,RX ENABLE,CLOCK)에 따라 동조 및 발진을 수행하여 원하는 채널을 수신하는 수신부와, 송신데이타(TX DATA)의 레벨을 감쇠시켜 출력하는 감쇠기와, 상기 마이컴으로 부터 출력되는 송신제어데이타(DATA, TX ENABLE,CLOCK)를 입력받는 동시에 상기 감쇠기의 출력신호를 입력받아 동조 및 발진을 수행하여 원하는 채널을 송신하는 송신수부와, 상기 송신부 및 감쇠기에연결되어 송신하는 경우에만 온시키는 송신스위치와, 상기 송신수부의 출력을 원하는 레벨로 증폭하는 송신증폭기로 구성된 것을 특징으로 하는 케이블 텔레비젼용 송신주파수 안정화회로.A receiver for receiving a desired channel by performing tuning and oscillation according to reception control data (DATA, RX ENABLE, CLOCK) input from a microcomputer, an attenuator for attenuating and outputting a level of TX data, and the microcomputer A transmission unit for receiving a control signal (DATA, TX ENABLE, CLOCK) outputted from the transmitter and simultaneously receiving and outputting the output signal of the attenuator to perform tuning and oscillation to transmit a desired channel, and is connected to the transmitter and the attenuator and transmitted And a transmission switch for turning on only when the controller is turned on, and a transmission amplifier for amplifying the output of the transmission receiver to a desired level. 제1항에 있어서, 수신부는 수신제어신호에 따라 수신동조전압(Vtrx)를 출력하는 수신PLL과, 상기 수신 PLL의 수신동조전압에 따라 상기 수신PLL 및 수신복조부로 수신주파수(frx)를 발진하는 수신발진부로 구성된 것을 특징으로 하는 케이블 텔레비젼용 송신주파수 안정화회로.2. The receiver of claim 1, wherein the receiving unit oscillates a receiving frequency frx to the receiving PLL and the receiving demodulating unit according to the receiving PLL outputting the receiving tuning voltage Vtrx according to the receiving control signal. A transmission frequency stabilization circuit for a cable television, comprising: a reception oscillation unit. 제1항에 있어서, 송신부는 송신제어신호에 따라 송신동조전압(Vttx)을 출력하는 송신PLL과, 상기 송신 PLL의 송신동조전압에 따라 상기 송신PLL로 송신주파수 (ftx)를 피드백하는 동시에 상기 송신증폭기로 송신주파수(ftx)를 출력하는 송신발진부로 구성된 것을 특징으로 하는 케이블 텔레비젼용 송신주파수 안정화회로.The transmitter of claim 1, wherein the transmitter feeds back a transmission PLL outputting a transmission tuning voltage Vttx in accordance with a transmission control signal, and feeds back a transmission frequency ftx to the transmission PLL in accordance with the transmission tuning voltage of the transmission PLL. A transmission frequency stabilization circuit for a cable television, comprising: a transmission oscillation unit for outputting a transmission frequency ftx to an amplifier. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940028010A 1994-10-28 1994-10-28 Transmission frequency stabilization circuit of cable television KR0131966B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940028010A KR0131966B1 (en) 1994-10-28 1994-10-28 Transmission frequency stabilization circuit of cable television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940028010A KR0131966B1 (en) 1994-10-28 1994-10-28 Transmission frequency stabilization circuit of cable television

Publications (2)

Publication Number Publication Date
KR960016572A true KR960016572A (en) 1996-05-22
KR0131966B1 KR0131966B1 (en) 1998-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940028010A KR0131966B1 (en) 1994-10-28 1994-10-28 Transmission frequency stabilization circuit of cable television

Country Status (1)

Country Link
KR (1) KR0131966B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000072609A (en) * 2000-09-15 2000-12-05 이민석 Pressure sontroller shoes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000072609A (en) * 2000-09-15 2000-12-05 이민석 Pressure sontroller shoes

Also Published As

Publication number Publication date
KR0131966B1 (en) 1998-04-16

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