JPS55117721A - Level detector - Google Patents

Level detector

Info

Publication number
JPS55117721A
JPS55117721A JP2364879A JP2364879A JPS55117721A JP S55117721 A JPS55117721 A JP S55117721A JP 2364879 A JP2364879 A JP 2364879A JP 2364879 A JP2364879 A JP 2364879A JP S55117721 A JPS55117721 A JP S55117721A
Authority
JP
Japan
Prior art keywords
level
reproduced
decision
mark
input signal
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
JP2364879A
Other languages
Japanese (ja)
Other versions
JPS6161186B2 (en
Inventor
Hironori Mochizuki
Soichi Onishi
Kensaku Komai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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 by Sharp Corp filed Critical Sharp Corp
Priority to JP2364879A priority Critical patent/JPS55117721A/en
Priority to DE3007409A priority patent/DE3007409C2/en
Priority to US06/125,093 priority patent/US4512027A/en
Publication of JPS55117721A publication Critical patent/JPS55117721A/en
Publication of JPS6161186B2 publication Critical patent/JPS6161186B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Landscapes

  • Cash Registers Or Receiving Machines (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To give a decision on the amplitude level of an input signal by measuring the time width of a rectangular-wave pulse signal obtained by rectifying and integrating the input signal. CONSTITUTION:Reproduced data, inputted to input terminal 4 of electronic apparatus 3, is amplified by amplifier 7, rectified and integrated by integrator 8 at the next stage, and shaped into a rectangular wave by waveform shaping circuit 9. Then, measuring circuit 10 at the next stage measures pulse time width T of the rectangular waveform. Next, decision circuit 11 makes a decision on whether measured pulse time width T is greater or less than the preset time; and mark ''H'' when it is at an excessive level or mark ''M'' when at an adequate level is displayed by display part 16. Further, when the reproduced level is lower than a fixed value, reproduced-level detection circuit 17 detects that to display mark ''L'' on display part 16. Thus, the amplitude level of the reproduced input signal can be decided.
JP2364879A 1979-02-28 1979-02-28 Level detector Granted JPS55117721A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2364879A JPS55117721A (en) 1979-02-28 1979-02-28 Level detector
DE3007409A DE3007409C2 (en) 1979-02-28 1980-02-27 Circuit arrangement for level checking
US06/125,093 US4512027A (en) 1979-02-28 1980-02-27 Electronic calculating device with faculties of detecting reproduction level of data applied thereto

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2364879A JPS55117721A (en) 1979-02-28 1979-02-28 Level detector

Publications (2)

Publication Number Publication Date
JPS55117721A true JPS55117721A (en) 1980-09-10
JPS6161186B2 JPS6161186B2 (en) 1986-12-24

Family

ID=12116361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2364879A Granted JPS55117721A (en) 1979-02-28 1979-02-28 Level detector

Country Status (1)

Country Link
JP (1) JPS55117721A (en)

Also Published As

Publication number Publication date
JPS6161186B2 (en) 1986-12-24

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