JPH0316719U - - Google Patents

Info

Publication number
JPH0316719U
JPH0316719U JP7563989U JP7563989U JPH0316719U JP H0316719 U JPH0316719 U JP H0316719U JP 7563989 U JP7563989 U JP 7563989U JP 7563989 U JP7563989 U JP 7563989U JP H0316719 U JPH0316719 U JP H0316719U
Authority
JP
Japan
Prior art keywords
modulation
circuit
oscillation frequency
degree
characteristic
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
JP7563989U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP7563989U priority Critical patent/JPH0316719U/ja
Publication of JPH0316719U publication Critical patent/JPH0316719U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図乃至第２図はこの考案に係るＦＭ変調回
路の実施例を示し、第１図は回路図、第２図はＶ
ＣＯ回路の発振周波数と変調度の関係を示す特性
図である。第３図は従来例の回路図、第４図は従
来例のＶＣＯ回路の発振周波数と変調度の関係を
示す特性図である。 主な符号の説明、１……第１の変調回路、２…
…第２の変調回路、３……ＶＣＯ回路。 1 and 2 show an embodiment of the FM modulation circuit according to this invention, FIG. 1 is a circuit diagram, and FIG. 2 is a V
FIG. 3 is a characteristic diagram showing the relationship between the oscillation frequency and modulation degree of the CO circuit. FIG. 3 is a circuit diagram of a conventional example, and FIG. 4 is a characteristic diagram showing the relationship between oscillation frequency and modulation degree of a conventional VCO circuit. Explanation of main symbols, 1...first modulation circuit, 2...
...Second modulation circuit, 3...VCO circuit.

Claims (1)

【実用新案登録請求の範囲】 ＶＣＯ回路に可変リアクタンス素子を用いて構
成したＦＭ変調回路において、 ＶＣＯ回路の発振周波数に対して変調度が反比
例する特性を有した第１の変調回路にＶＣＯ回路
の発振周波数に対して変調度が比例する特性を有
した第２の変調回路を設け、この第１及び、第２
の変調回路を組合わせることによつて変調度のＶ
ＣＯ回路発振周波数変化を補償するように構成し
たことを特徴とするＦＭ変調回路。[Claims for Utility Model Registration] In an FM modulation circuit configured using a variable reactance element in a VCO circuit, the first modulation circuit has a characteristic that the degree of modulation is inversely proportional to the oscillation frequency of the VCO circuit. A second modulation circuit having a characteristic that the degree of modulation is proportional to the oscillation frequency is provided, and the first and second modulation circuits are
By combining the modulation circuits, the modulation depth V
An FM modulation circuit characterized in that it is configured to compensate for changes in CO circuit oscillation frequency.
JP7563989U 1989-06-29 1989-06-29 Pending JPH0316719U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7563989U JPH0316719U (en) 1989-06-29 1989-06-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7563989U JPH0316719U (en) 1989-06-29 1989-06-29

Publications (1)

Publication Number Publication Date
JPH0316719U true JPH0316719U (en) 1991-02-19

Family

ID=31616390

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7563989U Pending JPH0316719U (en) 1989-06-29 1989-06-29

Country Status (1)

Country Link
JP (1) JPH0316719U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007423A1 (en) * 1997-08-07 1999-02-18 Chikashi Kondo Needle protecting cap and needle disposal instrument
JP2005261618A (en) * 2004-03-18 2005-09-29 Kawasumi Lab Inc Accessory for disposing needle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528677A (en) * 1978-08-22 1980-02-29 Nec Corp Frequency conversion circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5528677A (en) * 1978-08-22 1980-02-29 Nec Corp Frequency conversion circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999007423A1 (en) * 1997-08-07 1999-02-18 Chikashi Kondo Needle protecting cap and needle disposal instrument
JP2005261618A (en) * 2004-03-18 2005-09-29 Kawasumi Lab Inc Accessory for disposing needle
JP4495988B2 (en) * 2004-03-18 2010-07-07 川澄化学工業株式会社 Needle disposal aid

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