JPS59144909U - frequency modulation circuit - Google Patents
frequency modulation circuitInfo
- Publication number
- JPS59144909U JPS59144909U JP3981983U JP3981983U JPS59144909U JP S59144909 U JPS59144909 U JP S59144909U JP 3981983 U JP3981983 U JP 3981983U JP 3981983 U JP3981983 U JP 3981983U JP S59144909 U JPS59144909 U JP S59144909U
- Authority
- JP
- Japan
- Prior art keywords
- modulation circuit
- frequency modulation
- variable capacitance
- capacitance diode
- diode
- 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
Links
Landscapes
- Amplifiers (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。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の周波数変調回路を示す図、第２図は可変
容量ダイオードに信号を印加したときの容量変化を示す
特性図、第３図は本考案に係る周波数変調回路の一実施
例を示す回路図、第４図イはトランジスタＱ１のベース
電位とコレクタｔｉとの関係を示す特性図、第４図口は
トランジスタＱ１に信号が印加されたときのコレクタ出
力電圧の変化を示す特性図、第４図ハは可変容量ダイオ
ードＤ□に第４図口の信号が印加されたときの可変容量
ダイオードＤ１の容量変化を示す特性図である。第５図
は本考案の他の実施例を示す回路図、第６図イはトラン
ジスタＱ、／のベース電位とコレクタ電流との関係を示
す特性図、第６図口はトランジスタＱ１′に信号が印加
されたときのコレクタ出力電圧の変化を示す特性図、第
６図ハは可変容量ダイオードＤ□に第６図口の信号が印
加されたときの可変容量ダイオードＤ□の容量変化を示
す特性図である。
Ｄｌ・・・・・・可変容量ダイオード、Ｑ、、 Ｑ□′
・・・・・・低周波増幅用トランジスタ。Fig. 1 is a diagram showing a conventional frequency modulation circuit, Fig. 2 is a characteristic diagram showing capacitance changes when a signal is applied to a variable capacitance diode, and Fig. 3 is an example of a frequency modulation circuit according to the present invention. 4A is a characteristic diagram showing the relationship between the base potential of the transistor Q1 and the collector ti; FIG. FIG. 4C is a characteristic diagram showing the capacitance change of the variable capacitance diode D1 when the signal shown in FIG. 4 is applied to the variable capacitance diode D□. Fig. 5 is a circuit diagram showing another embodiment of the present invention, Fig. 6 A is a characteristic diagram showing the relationship between the base potential and collector current of transistor Q, and Fig. Figure 6 C is a characteristic diagram showing the change in the collector output voltage when the voltage is applied to the variable capacitance diode D□. It is. Dl...Variable capacitance diode, Q,, Q□'
・・・・・・Transistor for low frequency amplification.
Claims (1)
て、前記可変容量ダイオードで発生する歪と逆極性の歪
を前記可変容量ダイオードの入力側に設けた低周波増幅
用トランジスタで発生させ、前記可変容量ダイオードで
発生する歪を打消すように構成したことを特徴とする周
波数変調回路。In a frequency modulation circuit using a variable capacitance diode, a low frequency amplification transistor provided on the input side of the variable capacitance diode generates distortion of opposite polarity to the distortion generated by the variable capacitance diode, and A frequency modulation circuit characterized by being configured to cancel distortion generated by a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3981983U JPS59144909U (en) | 1983-03-18 | 1983-03-18 | frequency modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3981983U JPS59144909U (en) | 1983-03-18 | 1983-03-18 | frequency modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59144909U true JPS59144909U (en) | 1984-09-27 |
Family
ID=30170454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3981983U Pending JPS59144909U (en) | 1983-03-18 | 1983-03-18 | frequency modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59144909U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124850A (en) * | 1976-04-13 | 1977-10-20 | Mitsubishi Electric Corp | Frequency modulation circuit |
-
1983
- 1983-03-18 JP JP3981983U patent/JPS59144909U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52124850A (en) * | 1976-04-13 | 1977-10-20 | Mitsubishi Electric Corp | Frequency modulation circuit |
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