JPS60167427U - Noise removal circuit - Google Patents
Noise removal circuitInfo
- Publication number
- JPS60167427U JPS60167427U JP5372084U JP5372084U JPS60167427U JP S60167427 U JPS60167427 U JP S60167427U JP 5372084 U JP5372084 U JP 5372084U JP 5372084 U JP5372084 U JP 5372084U JP S60167427 U JPS60167427 U JP S60167427U
- Authority
- JP
- Japan
- Prior art keywords
- output
- phase
- low
- pass filter
- locked loop
- 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)
- Filters And Equalizers (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図は従来の雑音除去回路を示す回路図、第２図はこ
の考案による雑音除去回路の一実施例を示す回路図であ
る。
１・・７入力端、２・・・リミッタ、３・・・位相ロッ
クループ回路、４・・・位相比較器、５・・・低域フィ
ルタ、６・・・電圧制御発振器、７・・・出力端。FIG. 1 is a circuit diagram showing a conventional noise removal circuit, and FIG. 2 is a circuit diagram showing an embodiment of the noise removal circuit according to this invention. 1...7 input end, 2...limiter, 3...phase locked loop circuit, 4...phase comparator, 5...low pass filter, 6...voltage controlled oscillator, 7... Output end.
Claims (1)
１に供給される入力信号の周波数と前記出力端７から出
力される出力信号の周波数との位相差を検出しその位相
差に応じたパルス幅のパルスを出力する位相比較器４と
、該位相比較器４からの出力パルスを平滑して直流電圧
を出力する低域フィルタ５と、該低域フィルタ５からの
出力電圧によ、つて発振周波数が制御されその発振出力
が前記出力端７に接続された電圧制御発振器６とか、
らなる位相ロックループ回路３を備え、該位相ロック
ループ回路３の低域フィルタ５はその遮断周波数が十分
低く設定されてなることを特徴とする雑音除去回路。The phase difference between the frequency of the input signal inserted between the input terminal 1 and the output terminal 7 and supplied to the input terminal 1 and the frequency of the output signal output from the output terminal 7 is detected and the phase difference is detected. A phase comparator 4 that outputs a pulse with a pulse width corresponding to the phase difference, a low-pass filter 5 that smoothes the output pulse from the phase comparator 4 and outputs a DC voltage, and an output voltage from the low-pass filter 5. a voltage controlled oscillator 6 whose oscillation frequency is controlled and whose oscillation output is connected to the output terminal 7;
1. A noise removal circuit comprising a phase-locked loop circuit 3 comprising a phase-locked loop circuit 3, wherein a low-pass filter 5 of the phase-locked loop circuit 3 has a cutoff frequency set sufficiently low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5372084U JPS60167427U (en) | 1984-04-12 | 1984-04-12 | Noise removal circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5372084U JPS60167427U (en) | 1984-04-12 | 1984-04-12 | Noise removal circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60167427U true JPS60167427U (en) | 1985-11-07 |
Family
ID=30574846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5372084U Pending JPS60167427U (en) | 1984-04-12 | 1984-04-12 | Noise removal circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60167427U (en) |
-
1984
- 1984-04-12 JP JP5372084U patent/JPS60167427U/en active Pending
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