KR970060668A - Wideband frequency modulation circuit using crystal - Google Patents

Wideband frequency modulation circuit using crystal Download PDF

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Publication number
KR970060668A
KR970060668A KR1019960000687A KR19960000687A KR970060668A KR 970060668 A KR970060668 A KR 970060668A KR 1019960000687 A KR1019960000687 A KR 1019960000687A KR 19960000687 A KR19960000687 A KR 19960000687A KR 970060668 A KR970060668 A KR 970060668A
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KR
South Korea
Prior art keywords
frequency
band
multiplier
pass filter
crystal
Prior art date
Application number
KR1019960000687A
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Korean (ko)
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KR0178107B1 (en
Inventor
송준화
Original Assignee
이용규
나우정밀 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 이용규, 나우정밀 주식회사 filed Critical 이용규
Priority to KR1019960000687A priority Critical patent/KR0178107B1/en
Publication of KR970060668A publication Critical patent/KR970060668A/en
Application granted granted Critical
Publication of KR0178107B1 publication Critical patent/KR0178107B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/06—Means for changing frequency deviation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/22—Angle modulation by means of variable impedance by means of a variable reactive element the element being a semiconductor diode, e.g. varicap diode
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0037—Functional aspects of modulators
    • H03C2200/005—Modulation sensitivity
    • H03C2200/0054—Filtering of the input modulating signal for obtaining a constant sensitivity of frequency modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C2200/00—Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0037—Functional aspects of modulators
    • H03C2200/0087—Measures to address temperature induced variations of modulation
    • H03C2200/0095—Measures to address temperature induced variations of modulation by compensating temperature induced variations

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  • Oscillators With Electromechanical Resonators (AREA)

Abstract

본 발명은 크리스탈을 이용하여 광대역 주파수를 변조하는 회로에 관한 것으로서, 더욱 구체적으로는 높은 변조도를 얻을 수 있으며, 또한 온도변화에 따른 편차가 최소화되도록 구성된 크리스탈을 이용한 광대역 주파수변조회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for modulating a wideband frequency using a crystal, and more particularly, to a broadband frequency modulation circuit using a crystal configured to obtain a high degree of modulation and minimize a variation with temperature change.

본 발명의 크리스탈을 이용한 광대역 주파수변조회로는, 변조회로에서 출력되는 신호를 체배시키기 위한 제1체배기와, 상기 제1체배기로부터 출력되는 신호중의 특정 주파수 대역만을 통과시키기 위한 제1대역통과필터와, 소정의 주파수신호를 발생시키기 위한 크리스탈발진기와 상기 크리스탈발진기로부터 출력되는 주파수신호를 체배시키기 위한 제2체배기와, 상기 제2체배기로부터 출력되는 주파수신호중의 특정 주파수대역만을 통과시키기 위한 제2대역통과필터와, 상기 제1대역통과필터로부터 출력되는 주파수신호와 상기 제2대역통과필터로부터 출력되는 주파수신호를 혼합시키기 위한 믹서를 포함한다.A wideband frequency modulation circuit using a crystal of the present invention includes a first multiplier for multiplying a signal output from a modulation circuit, a first band pass filter for passing only a specific frequency band among signals output from the first multiplier, A second multiplier for multiplying a frequency signal output from the crystal oscillator, a second band-pass filter for passing only a specific frequency band among the frequency signals output from the second multiplier, And a mixer for mixing a frequency signal output from the first band pass filter and a frequency signal output from the second band pass filter.

Description

크리스탈을 이용한 광대역 주파수변조회로Wideband frequency modulation circuit using crystal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명에 따른 크리스탈을 이용한 광대역 주파수변호회로의 개략적인 블럭도이다.FIG. 2 is a schematic block diagram of a broadband frequency counter using a crystal according to the present invention.

Claims (2)

소정의 발진 주파수신호를 변조하기 위한 것으로서, 발진회로로서 배리캡 다이오드(10)와 크리스탈발진기(12)를 포함하는 주파수의 변조 회로에 있어서, 상기 크리스탈 발진회로(10, 12)로부터 출력되는 데이타를 포함하는 변조된 신호를 2배, 3배의 정수배로 높이기 위한 제1체배기(20); 상기 제1체배기(20)로부터 출력되는 체배된 신호중의 소정의 변조도를 가진 특정주파수(f2)대역만을 통과시키기 위한 제1대역통과필터(22); 소정의 발진용 주파수를 발생시키기 위한 크리스털 발진기(24); 상기 크리스탈 발진기(24)로부터 출력되는 주파수를 체배시키기 위한 제2체배기(26); 상기 제2체배기(26)로부터 출력되는 신호중의 특정주파수(f1)대역만을 통과시키기 위한 제2대역통과필터(28); 및 상기 제1대역통과필터(22)로부터 출력되는 주파수(f2)와 상기 제2대역통과 필터(28)로부터 출력되는 주파수(f1)를 혼합하기 위한 믹서(30)를 포함하는 것을 특징으로 하는 광대역 주파수변조회로.A modulation circuit for frequency modulation including a crystal oscillator (12) and a varicap diode (10) as an oscillation circuit, for modulating a predetermined oscillation frequency signal, characterized in that data output from the crystal oscillation circuits A first multiplier (20) for increasing the modulated signal to be multiplied by an integer multiple of 2 and 3; A first band-pass filter (22) for passing only a specific frequency (f2) band having a predetermined modulation degree among the multiplied signals output from the first multiplier (20); A crystal oscillator (24) for generating a predetermined oscillation frequency; A second multiplier 26 for multiplying a frequency output from the crystal oscillator 24; A second band-pass filter (28) for passing only a specific frequency (f1) band of signals output from the second multiplier (26); And a mixer (30) for mixing the frequency (f2) output from the first band pass filter (22) and the frequency (f1) output from the second band pass filter (28) Frequency modulation circuit. 제1항에 있어서, 상기 믹서(30)에서 출력되는 송신 주파수가 f1-f2 또는 f2-f1의 주파수인 것을 특징으로 하는 광대역 주파수변조회로.The broadband frequency modulation circuit according to claim 1, wherein the transmission frequency output from the mixer (30) is a frequency of f1-f2 or f2-f1.
KR1019960000687A 1996-01-16 1996-01-16 Wideband frequency moudlating circuit using crystal KR0178107B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960000687A KR0178107B1 (en) 1996-01-16 1996-01-16 Wideband frequency moudlating circuit using crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960000687A KR0178107B1 (en) 1996-01-16 1996-01-16 Wideband frequency moudlating circuit using crystal

Publications (2)

Publication Number Publication Date
KR970060668A true KR970060668A (en) 1997-08-12
KR0178107B1 KR0178107B1 (en) 1999-04-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100404929B1 (en) * 2001-05-09 2003-11-07 정하철 Imaging apparatus of the eye and the face

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100404929B1 (en) * 2001-05-09 2003-11-07 정하철 Imaging apparatus of the eye and the face

Also Published As

Publication number Publication date
KR0178107B1 (en) 1999-04-01

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