JPS6072011U - PLL synchronous detection circuit - Google Patents
PLL synchronous detection circuitInfo
- Publication number
- JPS6072011U JPS6072011U JP16338383U JP16338383U JPS6072011U JP S6072011 U JPS6072011 U JP S6072011U JP 16338383 U JP16338383 U JP 16338383U JP 16338383 U JP16338383 U JP 16338383U JP S6072011 U JPS6072011 U JP S6072011U
- Authority
- JP
- Japan
- Prior art keywords
- mixer
- detection circuit
- synchronous detection
- controlled oscillator
- voltage controlled
- 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
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ＰＬＬ同期検波回路の基本的構成図、第
２図はＰＬＬ同期検波回路の一部を構成する９０″移相
器の一構成例、第３図は本考案に係るＰＬＬ同期検波回
路の一構成図である。
１・・・第１のミキサ、２・・・第２のミキサ、ｌ・・
・９００移相器、４・・・電圧制御発振器、５・・・低
域通過フィルタ、６・・・映像中間周波信号、７・・・
復調映像信号、８・・・１８０°移相器、３０−・・Ｐ
ＬＬ同期検波回路。Fig. 1 is a basic configuration diagram of a conventional PLL synchronous detection circuit, Fig. 2 is an example of the configuration of a 90'' phase shifter that constitutes a part of the PLL synchronous detection circuit, and Fig. 3 is a PLL synchronous detection circuit according to the present invention. It is a configuration diagram of a detection circuit. 1... First mixer, 2... Second mixer, l...
・900 phase shifter, 4... Voltage controlled oscillator, 5... Low pass filter, 6... Video intermediate frequency signal, 7...
Demodulated video signal, 8...180° phase shifter, 30-...P
LL synchronous detection circuit.
Claims (1)
サと、前記第２のミキサに順次接続される低周波通過フ
ィルタ、電圧制御発振器と、この電圧制御発振器の出力
を１８０°移相し前記第２のミキサの第２の入力として
供給する手段と、前記電圧制御発振器と容量結合しその
出力を９０°移相し前記第１のミキサの第２の入力とし
て供給する９０°移相器とを有し前記第１のミキサより
復調された映像信号出力を得ることを特徴とするＰＬＬ
同期検波回路。A first and second mixer having a video intermediate frequency signal as a first input, a low frequency pass filter and a voltage controlled oscillator connected in sequence to the second mixer, and an output of the voltage controlled oscillator shifted by 180 degrees. means for phase-shifting the output of the voltage controlled oscillator by 90 degrees and supplying it as a second input of the first mixer; A PLL characterized in that it has a phase shifter and obtains a demodulated video signal output from the first mixer.
Synchronous detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338383U JPS6072011U (en) | 1983-10-24 | 1983-10-24 | PLL synchronous detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16338383U JPS6072011U (en) | 1983-10-24 | 1983-10-24 | PLL synchronous detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6072011U true JPS6072011U (en) | 1985-05-21 |
Family
ID=30358515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16338383U Pending JPS6072011U (en) | 1983-10-24 | 1983-10-24 | PLL synchronous detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6072011U (en) |
-
1983
- 1983-10-24 JP JP16338383U patent/JPS6072011U/en active Pending
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