JPS6020013U

JPS6020013U - Floppy disk inspection device

Info

Publication number: JPS6020013U
Application number: JP11299383U
Authority: JP
Inventors: 松崎　正
Original assignee: アルプス電気株式会社
Priority date: 1983-07-19
Filing date: 1983-07-19
Publication date: 1985-02-12

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

[Brief explanation of drawings]

第１図は本考案にいうモジュレーションの概念を説明す
る説明図、第２図は本考案の１実施例ブロック図を示す
。図中、１はデータ処理装置、４は整流回路部、　６はロ
ーパス−フィルタ、７はサンプル・ホールド回路、９は
Ａ／Ｄ変換器、１０はデータ・メモリ、１１はＰ／Ｂ検
出部、１２は演算部、１５はフロラ　　′ビイ・ディス
ク拳ドライブ・コントローラ、１６はリード／ライトヘ
ッドを表わす。FIG. 1 is an explanatory diagram for explaining the concept of modulation according to the present invention, and FIG. 2 is a block diagram of one embodiment of the present invention. In the figure, 1 is a data processing device, 4 is a rectifier circuit section, 6 is a low-pass filter, 7 is a sample and hold circuit, 9 is an A/D converter, 10 is a data memory, 11 is a P/B detection section, Reference numeral 12 represents an arithmetic unit, 15 represents a Flora'bee disk drive controller, and 16 represents a read/write head.

Claims

[Scope of utility model registration request]

' In a floppy disk inspection device that writes at the same signal level on concentric tracks of a floppy disk, reads out the signal with a read head, and measures characteristics related to modulation.
A data processing device that instructs the write head to write a signal of the same level to a predetermined track and then reads the written signal by the read head, and a rectifier circuit that detects the signal read out according to the instruction from the data processing device. , a port for filtering the output from the rectifier circuit, a -pass filter, a sample-hold circuit for sampling and holding the output of the low-pass filter, and a sample-hold circuit for sampling and holding the output of the low-pass filter.
A data memory that sequentially stores the digital signal of the held result, a peak/bottom detector that sequentially reads out the data stored in the data memory and extracts the maximum and minimum values, and a peak/bottom detector that sequentially reads out the data stored in the data memory and extracts the maximum and minimum values from the peak/bottom detector. What is claimed is: 1. A floppy disk inspection device comprising: a calculation unit that calculates a minimum value/maximum value ratio based on maximum value and minimum value signals, and outputs a signal from the calculation unit as numerical data.