KR960003106A - Phase locked loop circuit for satellite broadcasting receiver - Google Patents

Phase locked loop circuit for satellite broadcasting receiver Download PDF

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Publication number
KR960003106A
KR960003106A KR1019940015365A KR19940015365A KR960003106A KR 960003106 A KR960003106 A KR 960003106A KR 1019940015365 A KR1019940015365 A KR 1019940015365A KR 19940015365 A KR19940015365 A KR 19940015365A KR 960003106 A KR960003106 A KR 960003106A
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KR
South Korea
Prior art keywords
frequency
oscillation frequency
phase
locked loop
generating
Prior art date
Application number
KR1019940015365A
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Korean (ko)
Inventor
장재선
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.)
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Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019940015365A priority Critical patent/KR960003106A/en
Publication of KR960003106A publication Critical patent/KR960003106A/en

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Abstract

본 발명은 Ku-Band 이상의 주파수 대역에서 안정된 발진주파수를 발생할 수 있는 위성방송 수신기용 위상 고정루프회로에 관한 것으로,이를 위하여 기준주파수(fr)를 발생시키기 위한 수정발진기와,기준주파수(fr)와 소정의 분주비로 분주된 발진주파수(fo)의 위상차를 검출하기 위한 위상검출기와,위상검출기에서 출력되는 위상차신호로 부터 소정의 직류전압을 발생하기 위한 루프필터와,루프필터로 부터 공급되는 직류전압의 크기에 따라 가변되는 발진주파수(fo)를 발생시키기 위한 전압제어 유전체공진 발진기와,이 전압제어 유전체공진 발진기에서 출력되는 발진주파수(fo)를 동일한 전력으로 분배하기 위한 커플러와,이 커플러로 부터의 발진주파수(fo)를 소정의 분주비로 분주하여 위상검출기에 제공하기 위한 분주수단을 구비하며,수정발진기에서 발생되는 기준주파수(fr)와 전압제어 유전체공진 발진기에서 발생되는 발진주파수(fo)사이에 주파수차를 최소화 시킴으로서,최종적으로 PLL 회로에서 출력되는 발진주파수(fo)의 위상잡음을 최소화 한 것이다.The present invention relates to a phase locked loop circuit for a satellite broadcasting receiver capable of generating a stable oscillation frequency in a frequency band above Ku-Band, and for this purpose, a crystal oscillator for generating a reference frequency (fr), a reference frequency (fr) and A phase detector for detecting a phase difference of the oscillation frequency fo divided by a predetermined division ratio, a loop filter for generating a predetermined DC voltage from a phase difference signal output from the phase detector, and a DC voltage supplied from the loop filter A voltage controlled dielectric resonator oscillator for generating an oscillation frequency fo which varies according to the size of the oscillator, a coupler for distributing the oscillation frequency fo output from the voltage controlled dielectric resonance oscillator with the same power, and from this coupler And dividing means for dividing the oscillation frequency (fo) at a predetermined frequency division ratio and providing it to the phase detector. By minimizing the frequency difference between the generated reference frequency fr and the oscillation frequency fo generated in the voltage controlled dielectric resonance oscillator, the phase noise of the oscillation frequency fo output from the PLL circuit is finally minimized.

Description

위성방송 수신기용 위상 고정루프회로Phase locked loop circuit for satellite broadcasting receiver

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

제2도는 본 발명의 바람직한 실시예에 따른 위상방송 수신기용 위상 고정루프회로에 대한 블럭도.2 is a block diagram of a phase locked loop circuit for a phase broadcast receiver according to a preferred embodiment of the present invention.

Claims (3)

Ku-Band 이상의 주파수 대역에서 사용하는 위성방송 수신기의 위상 고정루프회로에 있어서, 기준주파수(fr)을 발생시키기 위한 수정발진기와;상기 수정발진기에서 출력되는 기준주파수(fr)와 소정의 분주비로 분주된 발진주파수(fo)의 위상차를 검출하기 위한 위상검출기와;상기 위상검출기에서 출력되는 위상차신호를 저역 필터링하여 소정의 직류전압을 발생하기 위한 루프필터와;상기 루프필터로 부터 공급되는 직류전압의 크기에 따라 가변되는 상기 발진주파수(fo)를 발생시키기 위한 전압제어 유전체공진 발진기와;상기 전압제어 유전체공진 발진기에서 출력되는 발진주파수(fo)를 동일한 전력으로 분배하기 위한 커플러와;상기 커플러로 부터의 상기 발진주파수(fo)를 소정의 분주비로 분주하여 위상검출기에 제공하기 위한 분주수단으로 이루어진 위성방송 수신기용 위상 고정루프회로.A phase locked loop circuit of a satellite broadcasting receiver for use in a frequency band of Ku-Band or higher, comprising: a crystal oscillator for generating a reference frequency fr; frequency division with a reference frequency fr output from the crystal oscillator and a predetermined division ratio A phase detector for detecting a phase difference of the oscillation frequency fo; a loop filter for low-pass filtering the phase difference signal output from the phase detector to generate a predetermined DC voltage; and a DC filter supplied from the loop filter. A voltage controlled dielectric resonator oscillator for generating the oscillation frequency fo which varies according to size; a coupler for distributing the oscillation frequency fo output from the voltage controlled dielectric resonator oscillator with the same power; and from the coupler A frequency division means for dividing the oscillation frequency fo at a predetermined frequency division ratio and providing it to a phase detector; A phase locked loop circuit for sex broadcast receiver. 제1항에 있어서,상기 분주수단은 서로 직열로 연결되는 복수의 분주기로 구성되는 것을 특징으로 하는 위성방송 수신기용 위상 고정루프회로.The phase locked loop circuit of claim 1, wherein the frequency divider comprises a plurality of frequency dividers connected in series with each other. 제2항에 있어서,상기 각 분주기는 1/260 분주기인 것을 특징으로 하는 위성방송 수신기용 위상 고정루프.The phase locked loop of claim 2, wherein each of the dividers is a 1/260 divider. ※ 참고사항: 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the original application.
KR1019940015365A 1994-06-30 1994-06-30 Phase locked loop circuit for satellite broadcasting receiver KR960003106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940015365A KR960003106A (en) 1994-06-30 1994-06-30 Phase locked loop circuit for satellite broadcasting receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940015365A KR960003106A (en) 1994-06-30 1994-06-30 Phase locked loop circuit for satellite broadcasting receiver

Publications (1)

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KR960003106A true KR960003106A (en) 1996-01-26

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KR1019940015365A KR960003106A (en) 1994-06-30 1994-06-30 Phase locked loop circuit for satellite broadcasting receiver

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100834722B1 (en) * 2006-09-01 2008-06-05 (주)태광이엔시 The Local Oscillator using Dielectric Resonator and Frequency Synthesizer with it
US11692716B2 (en) 2020-05-15 2023-07-04 Electrolux Home Products, Inc. Housing for household appliance with external panel having integrated reinforcement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100834722B1 (en) * 2006-09-01 2008-06-05 (주)태광이엔시 The Local Oscillator using Dielectric Resonator and Frequency Synthesizer with it
US11692716B2 (en) 2020-05-15 2023-07-04 Electrolux Home Products, Inc. Housing for household appliance with external panel having integrated reinforcement

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