JPS59140541U - PLL synthesizer - Google Patents
PLL synthesizerInfo
- Publication number
- JPS59140541U JPS59140541U JP3417883U JP3417883U JPS59140541U JP S59140541 U JPS59140541 U JP S59140541U JP 3417883 U JP3417883 U JP 3417883U JP 3417883 U JP3417883 U JP 3417883U JP S59140541 U JPS59140541 U JP S59140541U
- Authority
- JP
- Japan
- Prior art keywords
- output signal
- voltage controlled
- controlled oscillator
- oscillator
- divides
- 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
- 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図は本考案の一実施例を示す構成図、第２図は位相
比較器の出力波形の一例を示す図である。
１・・・バイナリ−コード入力端子、２・・・可変分周
器、３・・・電圧制御発振器（ＶＣＯ）、４・・・Ｄ−
Ａ変換 器、５・・・位相比較器、５１・・・位相
比較回路、５２・・・チャージポンプ、６・・・出力端
子、７・・・ループフィルタ、８・・・リーク抵抗、９
・・・基準発振器。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of an output waveform of a phase comparator. 1... Binary code input terminal, 2... Variable frequency divider, 3... Voltage controlled oscillator (VCO), 4... D-
A converter, 5... Phase comparator, 51... Phase comparison circuit, 52... Charge pump, 6... Output terminal, 7... Loop filter, 8... Leak resistance, 9
...Reference oscillator.
Claims (1)
変設定され、電圧制御発振器の出力信号を分周する可変
分周器と、基準発振器と、可変分周器の出力信号の位相
と基準発振器の出力信号の位相とを比較する位相比較器
と、位相比較器の出力信号を電圧側御発振器に制御信号
として伝達するループフィルタと、一端がループフィル
タの一部に接続されたリーク抵抗と、前記デジタルデー
タが入力され出力端がリーク抵抗の他端に接続されたＤ
−Ａ変換器とを界備し、電圧制御発振器の回者発振周波
数においてリーク抵抗に流れる電流がほぼ一定となるよ
うにしたことを特徴とするＰＬＬシンセサイザー。A voltage controlled oscillator, a variable frequency divider whose frequency division number is variably set based on digital data and divides the output signal of the voltage controlled oscillator, a reference oscillator, and a variable frequency divider that divides the output signal of the voltage controlled oscillator, and a phase comparator that compares the phase of the output signal; a loop filter that transmits the output signal of the phase comparator to the voltage side control oscillator as a control signal; a leak resistor whose one end is connected to a part of the loop filter; D where digital data is input and the output end is connected to the other end of the leak resistance
- A converter, and a PLL synthesizer characterized in that the current flowing through the leakage resistor is substantially constant at the generator oscillation frequency of the voltage controlled oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3417883U JPS59140541U (en) | 1983-03-11 | 1983-03-11 | PLL synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3417883U JPS59140541U (en) | 1983-03-11 | 1983-03-11 | PLL synthesizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59140541U true JPS59140541U (en) | 1984-09-19 |
Family
ID=30164950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3417883U Pending JPS59140541U (en) | 1983-03-11 | 1983-03-11 | PLL synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59140541U (en) |
-
1983
- 1983-03-11 JP JP3417883U patent/JPS59140541U/en active Pending
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