JPS59101910A - 周波数変調器 - Google Patents

周波数変調器

Info

Publication number
JPS59101910A
JPS59101910A JP57211890A JP21189082A JPS59101910A JP S59101910 A JPS59101910 A JP S59101910A JP 57211890 A JP57211890 A JP 57211890A JP 21189082 A JP21189082 A JP 21189082A JP S59101910 A JPS59101910 A JP S59101910A
Authority
JP
Japan
Prior art keywords
characteristic
output
signal
inputted
terminal
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP57211890A
Other languages
English (en)
Inventor
Masateru Chiba
千葉　政輝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP57211890A priority Critical patent/JPS59101910A/ja
Publication of JPS59101910A publication Critical patent/JPS59101910A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/02—Details
    • H03C3/09—Modifications of modulator for regulating the mean frequency
    • H03C3/0908—Modifications of modulator for regulating the mean frequency using a phase locked loop
    • H03C3/095—Modifications of modulator for regulating the mean frequency using a phase locked loop applying frequency modulation to the loop in front of the voltage controlled oscillator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1203—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier being a single transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1231—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the amplifier comprising one or more bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1237—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator
    • H03B5/124—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance
    • H03B5/1243—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device comprising means for varying the frequency of the generator the means comprising a voltage dependent capacitance the means comprising voltage variable capacitance diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/12—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device
    • H03B5/1296—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being semiconductor device the feedback circuit comprising a transformer
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2200/00—Indexing scheme relating to details of oscillators covered by H03B
    • H03B2200/0002—Types of oscillators
    • H03B2200/0008—Colpitts oscillator
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 発明の技術分野 本発明は、フェーズドロックルー１（以）’ＰＬＬと略
す）を用いた周波１変８１１６に関し、フェーズドロッ
クルーフ内の電圧制御発掘器の構成を簡略できるように
したものである。
従来技術及びそのｒｇＪ題点 従来からＰＬＬを用いた周波数変調器が用いられている
かその構成は第１図の様に構成されている。すなわち基
準信号と電圧制御発振器出力を分周した出力を位相検出
器ＰＤに入力する。位相検出器ＰＤからは内入力の位相
差に応じた信号を出ル 力し、如１−プフィルタＬＦＬを介して電圧制御発振器
ＶＣＯの端子Ｔ１に入力する。電圧制紳発振６ｖｃｏの
端子Ｔ！には変調信号が入力し、端子ＴＩ＋Ｔ！に入力
した信号により可変容量ダイオードＶＤＩとＶＤｔの容
量を制御して電圧制御発掘器ＶＣＯの発振周波数を制御
する。ここで可変谷蓋ダイオードＭＤＩはＰＬＬを構成
するためのものであり、可変容量ダイオード■込は外部
変調のためのものである０この様に従来においては、Ｐ
ＬＬ用の可変容短ダイオードと外部変調用の？ｉ］笈容
髪ダイオードを別々に設けているため、周波数変調器が
高価になっていた。
発明の目的及び構成 本発明は、この様な欠点を除去し、単一の可変容量ダイ
オードを用いて周波数変調を行なう周波り変調器を提供
することを目的とし、この様な目的は、本発明によれ一
：、位相比較器、ループフィルタ、電圧制御発振器、分
局器を有し、該位相比較器から、基準４ｍ号と該電圧制
御発振器出力を該分局器により分周した信号の位相差に
応じた信号を出力し、該出力を該ループフィルタを介し
て該電圧制御発振器に入力するとともに該ルーズフィル
タ出力に笈シ、ジ信号をル貿する様にしたことを特徴と
する周披数変眺器によって達成される。
発明の実施例 以下本発明を実施例に基づいて説明する。第２図は、本
発明の実施例を示す図で、図中Ｔ３は端子、Ｃ８はコン
テンプ、Ｒ１は抵抗であり、第１図と同一部材には同−
杓号を付与している。
本発明においては、変調信号ｉｉ、端子Ｔ８から入力さ
れ、コンテンサＣＩ抵’ｂｔＲ＋よシなる補正回路を介
し、ルーフ−フィルタＬＦＬの血流主力と１畳され、端
子Ｔ１から電圧制御発振器ｖＣＯに入力する。
ここで補正回路は、第３図の曲＆２に示す如き特性を持
ち、一方ループフィルタＬＦＬは組３図の曲線ｌに示す
様な喘性を持っている。
従って、電圧制御発振６ＶＣＯに入力する信号は所足の
帯域内で平担な特性を持つ様になる。従って、変調信号
周波数対周波数偏移特性が平担となる。
発明の効果 以上の如く、本発明によれ幻、ルーズフィルタ出力と変
軸信号とを重畳して電圧制御発振器に入力するので、市
価な可変容量ダイオードを削減することができる。又−
穀に電圧制御発振器は、外乱、酬展性を考慮し、強個な
ケースに収容され、入出力端子とにハーメチック端子等
が用いられるが、本発明によれは、制御入力が１つ秋る
ので端子数が減少し、その分製作が容易となる０
【図面の簡単な説明】
第１図は従来の周波数変駒器を示す図、第２図は本発明
の一実施例を示す図、第３図はループフィルタと、補正
回路の特性を示す図である。 図中■ＣＯは電圧制御発振器、ＬＦＬはループフィルタ
、ＰＤは位相比較器である０ 代理人　弁理士　　松　岡　　宏四部

Claims (1)

    【特許請求の範囲】
  1. 位相比較器、ローパスフィルタ、電圧制御発掘器、分局
    器を崩し、該位相比較器から基準４８号と該電圧制御発
    振器出力を該分局器により分周した信号の位相差に応じ
    た信号を出力し、該出力を該ローパスフィルタを介して
    該電圧制御発振器に入力するとともに該ローパスフィル
    タ出力に変調信号を１畳する株にしたことを％似とする
    周波数変調器。
JP57211890A 1982-12-02 1982-12-02 周波数変調器 Pending JPS59101910A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57211890A JPS59101910A (ja) 1982-12-02 1982-12-02 周波数変調器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57211890A JPS59101910A (ja) 1982-12-02 1982-12-02 周波数変調器

Publications (1)

Publication Number Publication Date
JPS59101910A true JPS59101910A (ja) 1984-06-12

Family

ID=16613328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57211890A Pending JPS59101910A (ja) 1982-12-02 1982-12-02 周波数変調器

Country Status (1)

Country Link
JP (1) JPS59101910A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619790A1 (en) * 1999-03-17 2006-01-25 Tropian, Inc. Direct digital frequency synthesis enabling spur elimination

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293261A (en) * 1976-01-30 1977-08-05 Toyo Communication Equip Frequency modulating system
JPS5743615B2 (ja) * 1976-03-22 1982-09-16

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293261A (en) * 1976-01-30 1977-08-05 Toyo Communication Equip Frequency modulating system
JPS5743615B2 (ja) * 1976-03-22 1982-09-16

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1619790A1 (en) * 1999-03-17 2006-01-25 Tropian, Inc. Direct digital frequency synthesis enabling spur elimination

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