JPH0420729U - - Google Patents
Info
- Publication number
- JPH0420729U JPH0420729U JP6185790U JP6185790U JPH0420729U JP H0420729 U JPH0420729 U JP H0420729U JP 6185790 U JP6185790 U JP 6185790U JP 6185790 U JP6185790 U JP 6185790U JP H0420729 U JPH0420729 U JP H0420729U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- multiplier
- division ratio
- multipliers
- output
- 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
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
第１図は、本考案の一実施例を示すブロツク図
。第２図は、本考案を説明するための説明図。第
３図は、本考案の要部を説明するためのブロツク
図。第４図は、従来例を示すブロツク図である。
１……基準発振器、２……可変分周器、３……
第一周波数逓倍器、４……第二周波数逓倍器、５
……出力切換回路、６……同期モータ、７……切
換基準分周比設定装置、８……ロジツクコンパレ
ータ、９……線速度設定装置、１０……分周比演
算装置、１１……記録位置検出装置、２０……位
相比較器、２１……低時定数のローパスフイルタ
（ＬＰＦ（Ｌ））、２２……高時定数のローパス
フイルタ（ＬＰＦ（Ｕ））、２３……１／Ｎ分周
器、２４……電圧制御発振器（ＶＣＯ）、２５…
…ローパスフイルタ切換回路、２６……抵抗・コ
ンデンサ切換回路。
FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is an explanatory diagram for explaining the present invention. FIG. 3 is a block diagram for explaining the main parts of the present invention. FIG. 4 is a block diagram showing a conventional example. 1... Reference oscillator, 2... Variable frequency divider, 3...
First frequency multiplier, 4...Second frequency multiplier, 5
... Output switching circuit, 6 ... Synchronous motor, 7 ... Switching reference division ratio setting device, 8 ... Logic comparator, 9 ... Linear speed setting device, 10 ... Frequency division ratio calculation device, 11 ... Recording position detection device, 20... Phase comparator, 21... Low time constant low pass filter (LPF (L)), 22... High time constant low pass filter (LPF (U)), 23... 1/N Frequency divider, 24... Voltage controlled oscillator (VCO), 25...
...Low pass filter switching circuit, 26...Resistor/capacitor switching circuit.
Claims (1)
を任意の分周比で分周する可変分周器と、該可変
分周器の出力を入力とするアナログ型フエーズロ
ツクドループで構成した２つの周波数逓倍器と、
この２つの周波数逓倍器の出力を切換える切換回
路とで構成された広帯域周波数逓倍器において、
前記の２つの周波数逓倍器のうち周波数の低い第
一の周波数逓倍器と、該第一の周波数逓倍器の上
限近傍の周波数を下限近傍の周波数として共用す
る第二の周波数逓倍器と前記第一、第二の周波数
逓倍器の共用する周波数で分周比を設定する切換
基準分周比設定装置と、該切換基準分周比設定装
置の分周比と前記可変分周器の任意の分周比を比
較するロジツクコンパレータと、該ロジツクコン
パレータの出力によつて前記第一、第二の周波数
逓倍器の出力を切換える切換回路とによつて構成
されていることを特徴とする広帯域周波数逓倍器
。 Two frequency multipliers consisting of a reference frequency oscillator, a variable frequency divider that divides the output of the reference frequency oscillator at an arbitrary frequency division ratio, and an analog phase-locked loop that receives the output of the variable frequency divider as input. The vessel and
In a wideband frequency multiplier configured with a switching circuit that switches the outputs of these two frequency multipliers,
A first frequency multiplier having a lower frequency among the two frequency multipliers, a second frequency multiplier that shares a frequency near the upper limit of the first frequency multiplier as a frequency near the lower limit, and the first frequency multiplier. , a switching reference frequency division ratio setting device that sets a frequency division ratio at a frequency shared by the second frequency multiplier, and a frequency division ratio of the switching reference frequency division ratio setting device and an arbitrary frequency division of the variable frequency divider. A wideband frequency multiplier comprising: a logic comparator that compares the ratio; and a switching circuit that switches the outputs of the first and second frequency multipliers based on the output of the logic comparator. vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6185790U JPH0420729U (en) | 1990-06-12 | 1990-06-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6185790U JPH0420729U (en) | 1990-06-12 | 1990-06-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0420729U true JPH0420729U (en) | 1992-02-21 |
Family
ID=31590482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6185790U Pending JPH0420729U (en) | 1990-06-12 | 1990-06-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420729U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5149180A (en) * | 1974-10-25 | 1976-04-28 | Daicel Ltd | MAKUBUNRITOKUSEINOKAIFUKUHOHO |
-
1990
- 1990-06-12 JP JP6185790U patent/JPH0420729U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5149180A (en) * | 1974-10-25 | 1976-04-28 | Daicel Ltd | MAKUBUNRITOKUSEINOKAIFUKUHOHO |
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