JPS6349633U

JPS6349633U -

Info

Publication number: JPS6349633U
Application number: JP14265586U
Authority: JP
Priority date: 1986-09-19
Filing date: 1986-09-19
Publication date: 1988-04-04

Description

[Brief explanation of the drawing]

第１図は本考案の原理を示す図、第２図は本考
案の動作を説明するための波形図、第３図は本考
案によるキヤプスタンサーボ系の実施例である。Ｄ……ドラムサーボ系、Ｃ……キヤプスタンサ
ーボ系、１１……回転ドラム、１２……ドラム位
相発生器、１３……第１の分周器、１４……選択
手段、１５……位相比較回路、１６……第１の加
算器、１７……ドラム駆動回路、２１……ドラム
速度発生器、２２……第２の分周器、２３……選
択手段、２４……第１の周波数―電圧変換回路、
３１……キヤプスタン、３２……キヤプスタン速
度発生器、３３……第３の分周器、３４……選択
手段、３５……第２の周波数―電圧変換回路、３
６……第２の加算器、３７……キヤプスタン駆動
回路。 FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a waveform diagram for explaining the operation of the present invention, and FIG. 3 is an embodiment of the capstan servo system according to the present invention. D...Drum servo system, C...Capstan servo system, 11...Rotating drum, 12...Drum phase generator, 13...First frequency divider, 14...Selection means, 15...Phase Comparison circuit, 16...first adder, 17...drum drive circuit, 21...drum speed generator, 22...second frequency divider, 23...selection means, 24...first frequency -Voltage conversion circuit,
31... Capstan, 32... Capstan speed generator, 33... Third frequency divider, 34... Selection means, 35... Second frequency-voltage conversion circuit, 3
6... second adder, 37... capstan drive circuit.

Claims

[Scope of claim for utility model registration] Rotating drum 1 equipped with a rotating recording/reproducing head
1, a drum phase generator 12 that detects the rotational phase of this rotating drum, a first frequency divider 13 that divides the output of this phase generator, and the output of this frequency divider and the drum phase generator. a selection means 14 for selecting the output of the drum reference signal; and a phase comparison circuit 15 for comparing the phase of the signal supplied from the selection means with the drum reference signal.
a drum speed generator 21 that detects the rotational speed of the rotating drum; a second frequency divider 22 that divides the output of this speed generator; and a frequency divider 22 that divides the output of this frequency divider and the drum speed generator. a first frequency-voltage conversion circuit 24 that converts the frequency of the signal supplied from the selection means into a voltage; and a first frequency-voltage conversion circuit 24 that selects the output of the frequency-voltage conversion circuit and the phase comparison circuit 15. a drum servo system D consisting of a first adder 16 that adds the output of the adder; and a drum drive circuit 17 that drives the rotating drum under the control of the output of this adder; and detects the rotational speed of the capstan 31. a capstan speed generator 32; a third frequency divider 33 for dividing the output of this speed generator; a selection means 34 for selecting between the output of this frequency divider and the output of the capstan speed generator; a second frequency for converting the frequency of the signal supplied from the selection means into voltage;
A voltage conversion circuit 35, a second adder 36 that adds the output of this frequency-voltage conversion circuit and an error signal ER, and a capstan drive circuit 37 that drives the capstan under the control of the output of this adder. 1. A magnetic recording/reproducing device comprising a capstan servo system C.