JPS59108322U - frequency modulation circuit - Google Patents
frequency modulation circuitInfo
- Publication number
- JPS59108322U JPS59108322U JP139983U JP139983U JPS59108322U JP S59108322 U JPS59108322 U JP S59108322U JP 139983 U JP139983 U JP 139983U JP 139983 U JP139983 U JP 139983U JP S59108322 U JPS59108322 U JP S59108322U
- Authority
- JP
- Japan
- Prior art keywords
- variable capacitance
- capacitance diode
- frequency
- circuit
- oscillation circuit
- 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
- Oscillators With Electromechanical Resonators (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) [Summary] 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回路図、第２図は
本考案の周波数変調回路を示す回路図、第３図は第２図
の回路を利用したＰＬＬ回路を示すブロック図、第４図
は変形例の変調回路の一部を示す回路図、第５図は変形
例のバーｌ−シー発振回路を示す回路図である。
１・・・制御電圧入力端子、２・・・信号入力端子、３
・・・直流周波数制御電圧供給回路、４・・・信号供給
回路、Ｅ・・・直流周波数制御電圧源、ｅ・・・情報信
号源、ＶＣ・・・可変容量ダイオード、Ｒ１１・・・抵
抗、Ｃ□１・・・コンデンサ、Ｑ・・・トランジスタ。FIG. 1 is a circuit diagram showing a conventional frequency modulation circuit, FIG. 2 is a circuit diagram showing a frequency modulation circuit of the present invention, FIG. 3 is a block diagram showing a PLL circuit using the circuit in FIG. 2, and FIG. The figure is a circuit diagram showing a part of a modulation circuit of a modified example, and FIG. 5 is a circuit diagram showing a Versi oscillation circuit of a modified example. 1... Control voltage input terminal, 2... Signal input terminal, 3
... DC frequency control voltage supply circuit, 4 ... Signal supply circuit, E ... DC frequency control voltage source, e ... Information signal source, VC ... Variable capacitance diode, R11 ... Resistor, C□1...Capacitor, Q...Transistor.
Claims (3)
て発振周波数が変化する発振回路と、前記発振回路の出
力周波数の中心周波数を決定するために前記可変容量ダ
イオードＶＣを逆バイアスする方向の直流周波数制御電
圧を前記可変容量ダイオードＶＣの一端に供給する直流
周波数制御電圧供給回路３と、 前記可変容量ダイオードＶＣの他端と接地又は共通ライ
ンとの間に接続されたコンデンサＣ１１と、 前記コンデンサＣ１、に並列に接続された抵抗Ｒ１１と
、 信号波の電圧変化に対応させて前記可変容量ダイオード
ＶＣの容量を変化させるために前記可変容量ダイオード
ＶＣと前記コンデンサＣ１□との間に前記信号波を供給
する信号供給回路４と、から成ることを特徴とする周波
数変調回路。(1) An oscillation circuit whose oscillation frequency changes in response to a change in the capacitance value of a variable capacitance diode VC, and a direction in which the variable capacitance diode VC is reverse biased to determine the center frequency of the output frequency of the oscillation circuit. a DC frequency control voltage supply circuit 3 that supplies a DC frequency control voltage to one end of the variable capacitance diode VC; a capacitor C11 connected between the other end of the variable capacitance diode VC and ground or a common line; A resistor R11 is connected in parallel to C1, and the signal wave is connected between the variable capacitance diode VC and the capacitor C1□ in order to change the capacitance of the variable capacitance diode VC in accordance with the voltage change of the signal wave. A frequency modulation circuit characterized by comprising: a signal supply circuit 4 that supplies a signal.
。 実用新案登録請求の範囲第１項記載の周波数変調回路。(2) The oscillation circuit is a Colpitts type oscillation circuit.
. A frequency modulation circuit according to claim 1 of the utility model registration claim.
新案登録請求の範囲第１項記載の周波数変調回路。(3) The frequency modulation circuit according to claim 1, wherein the oscillation circuit is a Hartley type oscillation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP139983U JPS59108322U (en) | 1983-01-10 | 1983-01-10 | frequency modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP139983U JPS59108322U (en) | 1983-01-10 | 1983-01-10 | frequency modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59108322U true JPS59108322U (en) | 1984-07-21 |
Family
ID=30133128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP139983U Pending JPS59108322U (en) | 1983-01-10 | 1983-01-10 | frequency modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59108322U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516824B2 (en) * | 1976-12-31 | 1980-05-07 |
-
1983
- 1983-01-10 JP JP139983U patent/JPS59108322U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5516824B2 (en) * | 1976-12-31 | 1980-05-07 |
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