JPS6316726U - - Google Patents
Info
- Publication number
- JPS6316726U JPS6316726U JP11085586U JP11085586U JPS6316726U JP S6316726 U JPS6316726 U JP S6316726U JP 11085586 U JP11085586 U JP 11085586U JP 11085586 U JP11085586 U JP 11085586U JP S6316726 U JPS6316726 U JP S6316726U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency divider
- output
- reference frequency
- discrimination
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案の実施例を示すブロツク図、第
２図は第１図に示された実施例の動作を示すタイ
ミング図である。
１……可変分周回路、２……電圧制御発振回路
、３……基準分周回路、４……水晶発振回路、５
……位相比較回路、６……ローパスフイルタ、７
……弁別回路、１３……切換ゲート回路、１４…
…データ入力手段。
FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart showing the operation of the embodiment shown in FIG. 1... Variable frequency divider circuit, 2... Voltage controlled oscillation circuit, 3... Reference frequency divider circuit, 4... Crystal oscillation circuit, 5
...Phase comparison circuit, 6...Low pass filter, 7
...Discrimination circuit, 13...Switching gate circuit, 14...
...Data input means.
Claims (1)
する可変分周回路と、基準周波数を分周する基準
分周回路と、前記可変分周回路からの分周出力と
基準分周回路からの分周出力の位相差を検出する
位相比較回路とを備えたＰＬＬのアンロツク検出
回路に於いて、前記基準分周回路から取り出され
た周期の異なる複数の分周出力が印加された切換
ゲート手段と、該切換ゲート手段から出力された
分周出力を弁別パルスとし前記位相比較回路から
の位相差信号をパルス幅弁別する弁別回路と、外
部から印加されるデータを入力保持し前記切換ゲ
ート回路を制御するデータ入力手段とを備えて成
るＰＬＬのアンロツク検出回路。 A variable frequency divider circuit that divides the frequency output from the voltage controlled oscillator circuit, a reference frequency divider circuit that divides the reference frequency, and a frequency division output from the variable frequency divider circuit and a frequency divider from the reference frequency divider circuit. A PLL unlock detection circuit comprising a phase comparison circuit for detecting a phase difference between outputs, a switching gate means to which a plurality of divided outputs having different periods extracted from the reference frequency dividing circuit are applied; a discrimination circuit that uses the divided output output from the switching gate means as a discrimination pulse and discriminates the pulse width of the phase difference signal from the phase comparison circuit; and a discrimination circuit that inputs and holds externally applied data to control the switching gate circuit. 1. A PLL unlock detection circuit comprising input means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11085586U JPH0430830Y2 (en) | 1986-07-18 | 1986-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11085586U JPH0430830Y2 (en) | 1986-07-18 | 1986-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6316726U true JPS6316726U (en) | 1988-02-03 |
| JPH0430830Y2 JPH0430830Y2 (en) | 1992-07-24 |
Family
ID=30990243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11085586U Expired JPH0430830Y2 (en) | 1986-07-18 | 1986-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0430830Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63263919A (en) * | 1987-04-22 | 1988-10-31 | Hitachi Ltd | Pll circuit |
-
1986
- 1986-07-18 JP JP11085586U patent/JPH0430830Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63263919A (en) * | 1987-04-22 | 1988-10-31 | Hitachi Ltd | Pll circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0430830Y2 (en) | 1992-07-24 |
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