JPS6473913A - Synchronizing signal detection system - Google Patents

Synchronizing signal detection system

Info

Publication number
JPS6473913A
JPS6473913A JP23174887A JP23174887A JPS6473913A JP S6473913 A JPS6473913 A JP S6473913A JP 23174887 A JP23174887 A JP 23174887A JP 23174887 A JP23174887 A JP 23174887A JP S6473913 A JPS6473913 A JP S6473913A
Authority
JP
Japan
Prior art keywords
synchronizing signal
edge pulse
interval
edge
detected
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
JP23174887A
Other languages
Japanese (ja)
Other versions
JPH07109981B2 (en
Inventor
Fumihiko Yokogawa
Hiroyuki Hirano
Keiji Kanehara
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP23174887A priority Critical patent/JPH07109981B2/en
Priority to US07/162,625 priority patent/US4872155A/en
Publication of JPS6473913A publication Critical patent/JPS6473913A/en
Priority to US07/367,771 priority patent/US4982110A/en
Publication of JPH07109981B2 publication Critical patent/JPH07109981B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To detect correctly a synchronizing signal by masking the intermediate period of two edge pulses at the stable detection of a synchronizing signal in comparing the interval of the two edge pulses of an input signal with a reference interval so as to detect the synchronizing signal. CONSTITUTION:The edge pulse of the input signal is detected to detect the interval of each edge pulse. When the interval between a 1st edge pulse and a 2nd edge pulse is equal to the preset prescribed reference interval, a detection signal for the synchronizing signal is outputted. When the synchronizing signal is detected stably, the intermediate edge pulse between the 1st edge pulse and the 2nd edge pulse is masked. The edge pulse at the initializing (the synchronizing signal is not stably detected) is not masked. Thus, the erroneous detection of the data as the synchronizing signal is prevented and even if an edge pulse due to a defect of a disk takes place in the middle of the reference interval, the synchronizing signal is detected stably.
JP23174887A 1987-03-13 1987-09-16 Sync signal detection circuit Expired - Fee Related JPH07109981B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP23174887A JPH07109981B2 (en) 1987-09-16 1987-09-16 Sync signal detection circuit
US07/162,625 US4872155A (en) 1987-03-13 1988-03-01 Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock
US07/367,771 US4982110A (en) 1987-03-13 1989-06-19 Clock generator circuit and a synchronizing signal detection method in a sampled format system and a phase comparator circuit suited for generation of the clock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23174887A JPH07109981B2 (en) 1987-09-16 1987-09-16 Sync signal detection circuit

Publications (2)

Publication Number Publication Date
JPS6473913A true JPS6473913A (en) 1989-03-20
JPH07109981B2 JPH07109981B2 (en) 1995-11-22

Family

ID=16928420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23174887A Expired - Fee Related JPH07109981B2 (en) 1987-03-13 1987-09-16 Sync signal detection circuit

Country Status (1)

Country Link
JP (1) JPH07109981B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047658A (en) * 1990-06-01 1991-09-10 Ncr Corporation High frequency asynchronous data synchronizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5047658A (en) * 1990-06-01 1991-09-10 Ncr Corporation High frequency asynchronous data synchronizer

Also Published As

Publication number Publication date
JPH07109981B2 (en) 1995-11-22

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees