JPS59121732U - Pilot signal generation circuit for tracking - Google Patents
Pilot signal generation circuit for trackingInfo
- Publication number
- JPS59121732U JPS59121732U JP1238483U JP1238483U JPS59121732U JP S59121732 U JPS59121732 U JP S59121732U JP 1238483 U JP1238483 U JP 1238483U JP 1238483 U JP1238483 U JP 1238483U JP S59121732 U JPS59121732 U JP S59121732U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- pilot signal
- output
- signal
- outputs
- 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
- Adjustment Of The Magnetic Head Position Track Following On Tapes (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図は本考案によるトラッキング用パイロット信号発
生回路の一実施例を示す回路図、第２図ａ−ｆは第１図
に示すスイッチ制御回路の動作を説明するための波形図
である。
１・・・パルス発生回路、１ａ・・・電圧制御発振回路
、１ｂ・・・位相差検出回路、２・・・分周回路、３・
・・スイッチ制御回路、４・・・第１スイッチ回路、５
・・・２重積分回路、６・・・第２スイッチ回路、７ａ
〜７ｄ・・・可変利得増幅回路。FIG. 1 is a circuit diagram showing an embodiment of a tracking pilot signal generating circuit according to the present invention, and FIGS. 2 a to 2 f are waveform diagrams for explaining the operation of the switch control circuit shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Pulse generation circuit, 1a... Voltage controlled oscillation circuit, 1b... Phase difference detection circuit, 2... Frequency division circuit, 3.
...Switch control circuit, 4...First switch circuit, 5
...Double integration circuit, 6...Second switch circuit, 7a
~7d...Variable gain amplifier circuit.
Claims (1)
予め定められた周波数の互いに異なる複数種の出力信号
を発生する分周回路と、ビデオヘッドの切換に同期して
予め定められた順に前記分周回路の出力を選択して出力
する第１スイッチ回路と、この第１スイッチ回路の出力
信号を正弦波のパイロット信号に変換して出力する２重
積分回路と、この２重積分回路から発生されるパイロッ
ト信号を前記ビデオヘッドの切換に同期して複数の出力
端に分配することによりパイロット信号をその周波数別
に出力する第２スイッチ回路と、この第２スイッチ回路
の各出力端から発生される出力信号をそれぞれ予め定め
られた振幅に制御した後にパイロット信号として共通に
出力する複数の可変利得増幅回路とを備えたトラッキン
グ用パイロット信号発生回路。A frequency dividing circuit divides the clock signal supplied from the pulse generating circuit and generates a plurality of different types of output signals having predetermined frequencies; A first switch circuit that selects and outputs the output of the circuit, a double integrator circuit that converts the output signal of the first switch circuit into a sine wave pilot signal and outputs it, and a signal generated from the double integrator circuit. a second switch circuit that outputs the pilot signal according to its frequency by distributing the pilot signal to a plurality of output terminals in synchronization with switching of the video head; and an output generated from each output terminal of the second switch circuit. A tracking pilot signal generation circuit comprising a plurality of variable gain amplifier circuits that control each signal to a predetermined amplitude and then output the same as a pilot signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1238483U JPS59121732U (en) | 1983-01-31 | 1983-01-31 | Pilot signal generation circuit for tracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1238483U JPS59121732U (en) | 1983-01-31 | 1983-01-31 | Pilot signal generation circuit for tracking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59121732U true JPS59121732U (en) | 1984-08-16 |
Family
ID=30143786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1238483U Pending JPS59121732U (en) | 1983-01-31 | 1983-01-31 | Pilot signal generation circuit for tracking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59121732U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4932622A (en) * | 1972-07-20 | 1974-03-25 | ||
| JPS4947308A (en) * | 1972-09-12 | 1974-05-08 | ||
| JPS5760707A (en) * | 1980-09-29 | 1982-04-12 | Nec Corp | Oscillating circuit |
| JPS5743612B2 (en) * | 1976-10-22 | 1982-09-16 |
-
1983
- 1983-01-31 JP JP1238483U patent/JPS59121732U/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4932622A (en) * | 1972-07-20 | 1974-03-25 | ||
| JPS4947308A (en) * | 1972-09-12 | 1974-05-08 | ||
| JPS5743612B2 (en) * | 1976-10-22 | 1982-09-16 | ||
| JPS5760707A (en) * | 1980-09-29 | 1982-04-12 | Nec Corp | Oscillating circuit |
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