JPS591211U - frequency modulation circuit - Google Patents
frequency modulation circuitInfo
- Publication number
- JPS591211U JPS591211U JP9533282U JP9533282U JPS591211U JP S591211 U JPS591211 U JP S591211U JP 9533282 U JP9533282 U JP 9533282U JP 9533282 U JP9533282 U JP 9533282U JP S591211 U JPS591211 U JP S591211U
- Authority
- JP
- Japan
- Prior art keywords
- variable capacitance
- capacitance diode
- voltage
- capacitor
- 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.)
- Granted
Links
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (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。(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図は本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・・・タンク回路、■Ｃ２ｏ・・・第一可変容量ダイ
オード、■Ｃ２ｂ・・・第二可変容量ダイオード、Ｃ２
３・・・第一コンデンサ、’Ｃ２ｂ’・・第二コンデン
サ、Ｃ２ｃ・・・第三コンデンサ、Ｃ２，・・・第四コ
ンデンサ、Ｅ２８．Ｅ２５・・・共に直流電圧源、Ｅｔ
２・・・可変直流電圧源。FIG. 1 is a circuit diagram showing an example of a conventional frequency modulation circuit, and FIG. 2 is a circuit diagram of a frequency modulation circuit showing an embodiment of the present invention. 2...tank circuit, ■C2o...first variable capacitance diode, ■C2b...second variable capacitance diode, C2
3...first capacitor, 'C2b'...second capacitor, C2c...third capacitor, C2,...fourth capacitor, E28. E25...Both are DC voltage sources, Et
2...Variable DC voltage source.
Claims (1)
変容量ダイオードへ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の直列回路に同調コイルを並
列に接続し、前記第一コンデンサおよび前記第二コンデ
ンサの容量を前記第一可変容量ダイオードの容量および
前記可変容量ダイオードの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、該タンク回路
の周波数を制御するための、前記第一可変容量ダイオー
ドの陰極に直流電圧Ｖ２ａ、前記第二可変容量ダイオー
ドの陽極に前記直流電圧■２８より低電位の直流電圧■
２５、前記第一可変容量ダイオードの陽極と前記第二可
変容量ダイオードの陰極に前記直流電圧Ｖ２ｂ乃至前記
直流電圧Ｖ２８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。A tuning coil is connected in parallel to a series circuit in the order of a first variable capacitance diode, a first capacitor, a second variable capacitance diode whose polarity is in the same direction as the first variable capacitance diode, and a second capacitor. A tank circuit for an oscillator in which the capacitance of a second capacitor is made sufficiently larger than both the capacitance of the first variable capacitance diode and the capacitance of the variable capacitance diode, and a tank circuit for controlling the frequency of the tank circuit. A DC voltage V2a is applied to the cathode of the first variable capacitance diode, and a DC voltage ■ lower in potential than the DC voltage ■28 is applied to the anode of the second variable capacitance diode.
25. Means for supplying an adjustable DC voltage Vt2 in the range of the DC voltage V2b to the DC voltage V28 to the anode of the first variable capacitance diode and the cathode of the second variable capacitance diode, and the first variable capacitance diode. and means for superimposing a frequency modulated voltage source on each of the second variable capacitance diodes via a capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533282U JPS591211U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9533282U JPS591211U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS591211U true JPS591211U (en) | 1984-01-06 |
| JPH0136338Y2 JPH0136338Y2 (en) | 1989-11-06 |
Family
ID=30227713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9533282U Granted JPS591211U (en) | 1982-06-24 | 1982-06-24 | frequency modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS591211U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62181017U (en) * | 1986-05-07 | 1987-11-17 | ||
| JPH03123338A (en) * | 1989-09-28 | 1991-05-27 | American Teleph & Telegr Co <Att> | Method of clarifying pattern in photo- resist layer in contact printing process |
-
1982
- 1982-06-24 JP JP9533282U patent/JPS591211U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62181017U (en) * | 1986-05-07 | 1987-11-17 | ||
| JPH03123338A (en) * | 1989-09-28 | 1991-05-27 | American Teleph & Telegr Co <Att> | Method of clarifying pattern in photo- resist layer in contact printing process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0136338Y2 (en) | 1989-11-06 |
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