JPS5868711U - Control circuit for variable frequency oscillator - Google Patents
Control circuit for variable frequency oscillatorInfo
- Publication number
- JPS5868711U JPS5868711U JP16185581U JP16185581U JPS5868711U JP S5868711 U JPS5868711 U JP S5868711U JP 16185581 U JP16185581 U JP 16185581U JP 16185581 U JP16185581 U JP 16185581U JP S5868711 U JPS5868711 U JP S5868711U
- Authority
- JP
- Japan
- Prior art keywords
- variable frequency
- frequency oscillator
- control circuit
- frequency
- modulation
- 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
- Television Signal Processing For Recording (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (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図は従来の可変周波数発振器の制御回路を示すブロ
ック図、第２図はこの考案の可変周波数“ 発振器のブ
ロック図、第３図はこの考案を利用し、たＶＴＲのコギ
ング補償ブロック図である。
図中、１伯まｖｃｏ、１２は位相比較器、１３はローパ
スフィルタ、１４は増幅器、１５は加算回路である。Figure 1 is a block diagram showing the control circuit of a conventional variable frequency oscillator, Figure 2 is a block diagram of the variable frequency oscillator of this invention, and Figure 3 is a block diagram of cogging compensation for a VTR using this invention. In the figure, 1 is a phase comparator, 12 is a phase comparator, 13 is a low-pass filter, 14 is an amplifier, and 15 is an adder circuit.
Claims (1)
発振器において、前記可変周波数発振器の中心周波数を
一定にするためのＡＰＣ回路内に前記変調周波数ｆｍよ
り小さいカットオフ周波数ｆｅをもった低域通過形のフ
ィルタを挿入し、前記変調周波数ｆｍの変調信号と前記
ＡＰＣ回路の出力信号で前記可変周波数発振器を制御す
ることを特徴とする可変周波数発振器の制御回路。In a variable frequency oscillator that is FM modulated at a constant modulation frequency of 1 m or more, a low-pass type having a cutoff frequency fe smaller than the modulation frequency fm in an APC circuit for keeping the center frequency of the variable frequency oscillator constant. A control circuit for a variable frequency oscillator, characterized in that the variable frequency oscillator is controlled by a modulation signal of the modulation frequency fm and an output signal of the APC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16185581U JPS5868711U (en) | 1981-10-31 | 1981-10-31 | Control circuit for variable frequency oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16185581U JPS5868711U (en) | 1981-10-31 | 1981-10-31 | Control circuit for variable frequency oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5868711U true JPS5868711U (en) | 1983-05-10 |
Family
ID=29954190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16185581U Pending JPS5868711U (en) | 1981-10-31 | 1981-10-31 | Control circuit for variable frequency oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868711U (en) |
-
1981
- 1981-10-31 JP JP16185581U patent/JPS5868711U/en active Pending
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