JPS5593509A - Signal detection circuit - Google Patents

Signal detection circuit

Info

Publication number
JPS5593509A
JPS5593509A JP16158878A JP16158878A JPS5593509A JP S5593509 A JPS5593509 A JP S5593509A JP 16158878 A JP16158878 A JP 16158878A JP 16158878 A JP16158878 A JP 16158878A JP S5593509 A JPS5593509 A JP S5593509A
Authority
JP
Japan
Prior art keywords
signal
amplitude
differentiated
peak
detector
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
JP16158878A
Other languages
Japanese (ja)
Other versions
JPS6227444B2 (en
Inventor
Hideaki Uchikura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP16158878A priority Critical patent/JPS5593509A/en
Publication of JPS5593509A publication Critical patent/JPS5593509A/en
Publication of JPS6227444B2 publication Critical patent/JPS6227444B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To reduce the signal detection error rate dependent upon the amplitude discrimination system by improving amplitude fluctuation of a reproducing signal, which is differentiated for peak detection, by an LPF.
CONSTITUTION: Correction frequency modulation signal 14 reproduced from a magnetic tape and passing through transducer 4 and the first LPF6 is differentiated by differentiator 7 so that the peak may be detected by zero crossing detector 8, and the frequency characteristic is inverted, and the signal increases the amplitude according as the signal has a higher recording frequency, and therefore, the amplitude is changed in steps according to data patterns. This differentiated signal has the signal waveform of a high frequency attenuated by slice level generator 10 and the second LPF9 provided between level detector 11 and differentiator 7 and is so improved that peak amplitude fluctuation may be uniform. Consequently, the differentiated output which has amplitude fluctuation improved by the slice level, which is not affected by data patterns, is detected by detector 11 surely, so that the signal detection error generation rate can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP16158878A 1978-12-29 1978-12-29 Signal detection circuit Granted JPS5593509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16158878A JPS5593509A (en) 1978-12-29 1978-12-29 Signal detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16158878A JPS5593509A (en) 1978-12-29 1978-12-29 Signal detection circuit

Publications (2)

Publication Number Publication Date
JPS5593509A true JPS5593509A (en) 1980-07-16
JPS6227444B2 JPS6227444B2 (en) 1987-06-15

Family

ID=15737975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16158878A Granted JPS5593509A (en) 1978-12-29 1978-12-29 Signal detection circuit

Country Status (1)

Country Link
JP (1) JPS5593509A (en)

Also Published As

Publication number Publication date
JPS6227444B2 (en) 1987-06-15

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