JPS5972020U - frequency modulation circuit - Google Patents
frequency modulation circuitInfo
- Publication number
- JPS5972020U JPS5972020U JP9533382U JP9533382U JPS5972020U JP S5972020 U JPS5972020 U JP S5972020U JP 9533382 U JP9533382 U JP 9533382U JP 9533382 U JP9533382 U JP 9533382U JP S5972020 U JPS5972020 U JP S5972020U
- Authority
- JP
- Japan
- Prior art keywords
- capacitance diode
- variable capacitance
- capacitor
- voltage
- variable
- 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.)
- Granted
Links
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (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の一例を示す回路図。第
２図はこの考案の一実施例を示す周波数変調回路の回路
図である。
２・・・発振器用のタンク回路、ＶＣ２ａ・・・第一可
変容量ダイオード、ＶＣ２ｂ・・・第二可変容量ダイオ
ード、Ｌ２・・・同調コイル、Ｑ２ａ・・・第一コンデ
ンサ、Ｑ２ｂ−・・第二コンデンサ、Ｑ２Ｃ・・・第三
コンデンサ、Ｅ２ａ、 Ｅ２１３”・・共に直流電圧源
、Ｆｖ２・・・可変直流電圧源。FIG. 1 is a circuit diagram showing an example of a conventional frequency modulation circuit. FIG. 2 is a circuit diagram of a frequency modulation circuit showing an embodiment of this invention. 2...tank circuit for oscillator, VC2a...first variable capacitance diode, VC2b...second variable capacitance diode, L2...tuning coil, Q2a...first capacitor, Q2b-...th 2nd capacitor, Q2C...Third capacitor, E2a, E213''...Both DC voltage source, Fv2...Variable DC voltage source.
Claims (1)
変容量ダイオードと極性同一方向の第二可変容量ダイオ
ード、第二コンデンサの順に接続された閉回路の、前記
第一可変容量ダイオードもしくは前記第二可変容量ダイ
オードの両極に第三コンデンサと同調コイルの直列接続
回路を並列接続し、前記第一コンデンサの容量および前
記第二コンデンサの容量および前記第三コンデンサの容
量を前記第一可変容量ダイオードの基準容量、前記第二
可変容量ダイオードの基準容量のいづれと比べても十分
に大きくなした発振器用のタンク回路と、前記第一可変
容量ダイオードの陽極に直流電圧Ｖ２ａ、前記第二可変
容量ダイオードの陰極に直流電圧Ｖ２ｂ、前記第一可変
容量ダイオードの陰極および前記第二可変容量ダイオー
ドの陽極にそれぞれ前記直流電圧Ｖ２Ｊ”７至前記直流
電圧Ｖ２］、の範囲の調節可能な直流電圧Ｖｔ２を供給
する手段と、前記第一可変容量ダイオードと前記第二可
変容量ダイオードにそれぞれ容量を介して周波数変調電
圧源を重畳する手段とを具備する周波数変調回路。The first variable capacitance diode or the second variable capacitor in a closed circuit connected in this order of a first variable capacitance diode, a first capacitor, a second variable capacitance diode having the same polarity as the first variable capacitance diode, and a second capacitor. A series connection circuit of a third capacitor and a tuning coil is connected in parallel to both poles of the capacitance diode, and the capacitance of the first capacitor, the capacitance of the second capacitor, and the capacitance of the third capacitor are set as the reference capacitance of the first variable capacitance diode. , a tank circuit for an oscillator which is sufficiently larger than any of the reference capacitances of the second variable capacitance diode, a DC voltage V2a applied to the anode of the first variable capacitance diode, and a DC voltage V2a applied to the cathode of the second variable capacitance diode. DC voltage V2b, means for supplying an adjustable DC voltage Vt2 in the range from the DC voltage V2J''7 to the DC voltage V2] to the cathode of the first variable capacitance diode and the anode of the second variable capacitance diode, respectively; , means for superimposing a frequency modulated voltage source on the first variable capacitance diode and the second variable capacitance diode through capacitors, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533382U JPS5972020U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533382U JPS5972020U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5972020U true JPS5972020U (en) | 1984-05-16 |
| JPH0136339Y2 JPH0136339Y2 (en) | 1989-11-06 |
Family
ID=30227715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9533382U Granted JPS5972020U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5972020U (en) |
-
1982
- 1982-06-24 JP JP9533382U patent/JPS5972020U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0136339Y2 (en) | 1989-11-06 |
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