JPH028234U - - Google Patents

Info

Publication number
JPH028234U
JPH028234U JP8590488U JP8590488U JPH028234U JP H028234 U JPH028234 U JP H028234U JP 8590488 U JP8590488 U JP 8590488U JP 8590488 U JP8590488 U JP 8590488U JP H028234 U JPH028234 U JP H028234U
Authority
JP
Japan
Prior art keywords
circuit
signal
pll
sampling
switch
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
Application number
JP8590488U
Other languages
Japanese (ja)
Other versions
JPH0741217Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988085904U priority Critical patent/JPH0741217Y2/en
Publication of JPH028234U publication Critical patent/JPH028234U/ja
Application granted granted Critical
Publication of JPH0741217Y2 publication Critical patent/JPH0741217Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図及び第２図はこの考案に係るＰＬＬ回路
の実施例を示し、第１図はブロツク図、第２図は
他の実施例を示したブロツク図である。第３図は
従来のＰＬＬ回路のブロツク図である。 主な番号の説明、２：ＰＬＬ回路、３：位相比
較回路、４：ローパスフイルタ（ＬＰＦ）、５：
電圧制御発振回路（ＶＣＯ）、１０：データ検出
回路、１１，２１：スイツチ、１２：ＬＰＦ伝達
関数切換回路、１３：コンパレータ、１４，２４
：基準電圧発生回路、２０：サンプリングパルス
発生回路、２３：サンプルホールド回路。 1 and 2 show an embodiment of a PLL circuit according to this invention, with FIG. 1 being a block diagram and FIG. 2 being a block diagram showing another embodiment. FIG. 3 is a block diagram of a conventional PLL circuit. Explanation of main numbers, 2: PLL circuit, 3: Phase comparison circuit, 4: Low pass filter (LPF), 5:
Voltage controlled oscillator circuit (VCO), 10: Data detection circuit, 11, 21: Switch, 12: LPF transfer function switching circuit, 13: Comparator, 14, 24
: Reference voltage generation circuit, 20: Sampling pulse generation circuit, 23: Sample hold circuit.

Claims (1)

【実用新案登録請求の範囲】 １ 記録媒体に記録された再生信号の中から同期
クロツク信号を抽出するＰＬＬ回路において、 再生信号の有無を検出する検出回路と、この検
出回路の出力信号で制御するスイツチと、基準電
圧発生部とコンパレータより構成した上記ＰＬＬ
回路のローパスフイルタの伝達関係切換回路とを
設け、再生信号の無い時、上記スイツチを介して
入力するＶＣＯ制御電圧と上記基準電圧とを比較
する上記コンパレータの出力信号でローパスフイ
ルタの伝達関係の電圧を設定するように構成した
ことを特徴とするＰＬＬ回路。 ２ 再生信号が入力されない時にサンプリングパ
ルスを発生するサンプリングパルス発生回路と、
このサンプリングパルス発生回路の出力信号で制
御するスイツチと、基準電圧発生部を内蔵したサ
ンプリングホールド回路とを設け、再生信号の無
い時、上記スイツチを介して入力するＶＣＯ制御
電圧を上記サンプリングホールド回路にサンプル
ホールドし、このサンプリングホールド回路の出
力信号を上記ＰＬＬ回路のローパスフイルタの入
力側に帰還するように構成したことを特徴とする
請求項１記載のＰＬＬ回路。[Claims for Utility Model Registration] 1. In a PLL circuit that extracts a synchronous clock signal from a playback signal recorded on a recording medium, a detection circuit that detects the presence or absence of a playback signal, and control using the output signal of this detection circuit. The above PLL consists of a switch, a reference voltage generator, and a comparator.
A low-pass filter transmission relationship switching circuit is provided in the circuit, and when there is no reproduction signal, the output signal of the comparator compares the VCO control voltage input through the switch with the reference voltage, and the low-pass filter transmission relationship voltage is determined. A PLL circuit characterized in that it is configured to set. 2. A sampling pulse generation circuit that generates a sampling pulse when no reproduction signal is input;
A switch controlled by the output signal of this sampling pulse generation circuit and a sampling hold circuit with a built-in reference voltage generation section are provided, and when there is no reproduction signal, the VCO control voltage input via the switch is applied to the sampling hold circuit. 2. The PLL circuit according to claim 1, wherein the PLL circuit is configured to sample and hold and feed back the output signal of the sampling and hold circuit to the input side of a low-pass filter of the PLL circuit.
JP1988085904U 1988-06-30 1988-06-30 PLL circuit Expired - Lifetime JPH0741217Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988085904U JPH0741217Y2 (en) 1988-06-30 1988-06-30 PLL circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988085904U JPH0741217Y2 (en) 1988-06-30 1988-06-30 PLL circuit

Publications (2)

Publication Number Publication Date
JPH028234U true JPH028234U (en) 1990-01-19
JPH0741217Y2 JPH0741217Y2 (en) 1995-09-20

Family

ID=31310556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988085904U Expired - Lifetime JPH0741217Y2 (en) 1988-06-30 1988-06-30 PLL circuit

Country Status (1)

Country Link
JP (1) JPH0741217Y2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365449A (en) * 1976-11-22 1978-06-10 Teishichi Hayashi Device for warp feeding into circular knitting machine
JPS5432340U (en) * 1977-08-05 1979-03-02
JP2007114165A (en) * 2005-10-24 2007-05-10 Nippon Reliance Kk Device and method for detecting position of moving object

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176844A (en) * 1981-04-23 1982-10-30 Mitsubishi Electric Corp Phase synchronizing oscillator
JPS57195311A (en) * 1981-05-26 1982-12-01 Victor Co Of Japan Ltd Clock regenerating circuit
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPS6157122A (en) * 1984-08-28 1986-03-24 Nec Corp Pll circuit
JPS61189019A (en) * 1985-02-16 1986-08-22 Nec Corp Phase locked oscillating circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57176844A (en) * 1981-04-23 1982-10-30 Mitsubishi Electric Corp Phase synchronizing oscillator
JPS57195311A (en) * 1981-05-26 1982-12-01 Victor Co Of Japan Ltd Clock regenerating circuit
JPS58131820A (en) * 1982-01-29 1983-08-05 Nec Corp Phase locked loop circuit
JPS6157122A (en) * 1984-08-28 1986-03-24 Nec Corp Pll circuit
JPS61189019A (en) * 1985-02-16 1986-08-22 Nec Corp Phase locked oscillating circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365449A (en) * 1976-11-22 1978-06-10 Teishichi Hayashi Device for warp feeding into circular knitting machine
JPS5616215B2 (en) * 1976-11-22 1981-04-15
JPS5432340U (en) * 1977-08-05 1979-03-02
JPS5731180Y2 (en) * 1977-08-05 1982-07-08
JP2007114165A (en) * 2005-10-24 2007-05-10 Nippon Reliance Kk Device and method for detecting position of moving object

Also Published As

Publication number Publication date
JPH0741217Y2 (en) 1995-09-20

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