JPS619925U - automatic frequency adjustment device - Google Patents
automatic frequency adjustment deviceInfo
- Publication number
- JPS619925U JPS619925U JP9166384U JP9166384U JPS619925U JP S619925 U JPS619925 U JP S619925U JP 9166384 U JP9166384 U JP 9166384U JP 9166384 U JP9166384 U JP 9166384U JP S619925 U JPS619925 U JP S619925U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- reference oscillator
- adjustment device
- output
- frequency adjustment
- 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 Receiver Circuits (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (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図は本考案に係る自動周波数調整装置の一実施例を
示すブロック図、第２図は同実施例で用いる切換手段の
一例を示す回路図、第３図は同じく可変基準発振器の一
例を示す等価回路図、第４図は同じく基準発振器の一例
を示す等価回路図、第５図は本考案の動作タイミングを
示すタイムチャート、第６図は前記可変基準発振器の出
力特性を説明するための説明図、第７図は従来の自動周
波数調整装置を示すブロック図である。
１・・・電子チューナ、２・・・前置分周器、３・・・
プログラマブル分周器、４・・・周波数位相比較器、５
・・・固定分周器、６・・・基準発振器、１１・・・切
換手段、１２・・・可変基準発振器、１８．１９・・・
アンドゲート、２０・・・インパータ、２１・・・オア
ゲート、２４・・・バリキャツプ、２６・・・水晶振動
子。FIG. 1 is a block diagram showing an embodiment of an automatic frequency adjustment device according to the present invention, FIG. 2 is a circuit diagram showing an example of a switching means used in the same embodiment, and FIG. 3 is a block diagram showing an example of a variable reference oscillator. 4 is an equivalent circuit diagram showing an example of the reference oscillator, FIG. 5 is a time chart showing the operation timing of the present invention, and FIG. 6 is an equivalent circuit diagram for explaining the output characteristics of the variable reference oscillator. The explanatory diagram, FIG. 7, is a block diagram showing a conventional automatic frequency adjustment device. 1...Electronic tuner, 2...Prescaler, 3...
Programmable frequency divider, 4... Frequency phase comparator, 5
...Fixed frequency divider, 6.Reference oscillator, 11..Switching means, 12..Variable reference oscillator, 18.19..
AND gate, 20... Imperter, 21... OR gate, 24... Varicap, 26... Crystal resonator.
Claims (1)
給され、両出力の周波数を比較する周波数位相比較器を
有し、この比較器の出力で前記局部発振出力の周波数を
設定することのできる自動周波数調整装置において、 前記チューナ出力の周波数が弁別される特性に応じた制
御電圧で発振周波数が制御可能な可変基準発振器と、こ
の可変基準発振器の出力と前記基準発振器の出力とを選
択的に前記周波数位相比較器に供給する切換手段とを具
備し、選局時には前記基準発振器の出力に基いて、選局
後には前記可変基準発振器の出力に基いてそれぞれ前記
局部発振周波数を設定するようにしたことを特徴とする
自動周波数調整装置。[Claims for Utility Model Registration] The local oscillation output of the tuner and the oscillation output of the reference oscillator are supplied, and a frequency phase comparator is provided to compare the frequencies of both outputs. An automatic frequency adjustment device capable of setting a frequency includes: a variable reference oscillator whose oscillation frequency can be controlled by a control voltage according to a characteristic by which the frequency of the tuner output is discriminated; and an output of the variable reference oscillator and the reference oscillator. and switching means for selectively supplying the output of the variable reference oscillator to the frequency phase comparator; An automatic frequency adjustment device characterized by setting an oscillation frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9166384U JPS619925U (en) | 1984-06-21 | 1984-06-21 | automatic frequency adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9166384U JPS619925U (en) | 1984-06-21 | 1984-06-21 | automatic frequency adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS619925U true JPS619925U (en) | 1986-01-21 |
Family
ID=30647755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9166384U Pending JPS619925U (en) | 1984-06-21 | 1984-06-21 | automatic frequency adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS619925U (en) |
-
1984
- 1984-06-21 JP JP9166384U patent/JPS619925U/en active Pending
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