JPS54122943A - Synchronizing unit - Google Patents

Synchronizing unit

Info

Publication number
JPS54122943A
JPS54122943A JP2991278A JP2991278A JPS54122943A JP S54122943 A JPS54122943 A JP S54122943A JP 2991278 A JP2991278 A JP 2991278A JP 2991278 A JP2991278 A JP 2991278A JP S54122943 A JPS54122943 A JP S54122943A
Authority
JP
Japan
Prior art keywords
hazard
clock
period
time
inputted
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
JP2991278A
Other languages
Japanese (ja)
Other versions
JPS5731167B2 (en
Inventor
Takayuki Morioka
Takeshi Kato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2991278A priority Critical patent/JPS54122943A/en
Publication of JPS54122943A publication Critical patent/JPS54122943A/en
Publication of JPS5731167B2 publication Critical patent/JPS5731167B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Information Transfer Systems (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE: To reduce the useless time of sampling, by using the synchronizing signal having longer period than the hazard rectifying time before sampling and using the clock having desired period after sampling.
CONSTITUTION: Two clock having short and long period are inputted to FF10, 11, and the period of clock inputted to FF10 is about 3/2 period of hazard convergence time. When the asynchronous signal A and T1 input are duplicated at (a), hazard is caused to Q1. The detection circuit 13 opens the AND gate 15 after the hazard of Q1 is set and the signal without hazard is inputted to the data terminal D2 of FF11. If hazard has timing continuous to the time point (b), when the trigger input of FF11 uses the clock of the same period, it coincides at time point (c). In this case, if a clock faster than that to T1 is inputted to T2, FF11 is set at (d), and useless time can be reduced by the time difference between (d) and (c) in comparison with the clock with the same period to T1 and T2.
COPYRIGHT: (C)1979,JPO&Japio
JP2991278A 1978-03-17 1978-03-17 Synchronizing unit Granted JPS54122943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2991278A JPS54122943A (en) 1978-03-17 1978-03-17 Synchronizing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2991278A JPS54122943A (en) 1978-03-17 1978-03-17 Synchronizing unit

Publications (2)

Publication Number Publication Date
JPS54122943A true JPS54122943A (en) 1979-09-22
JPS5731167B2 JPS5731167B2 (en) 1982-07-02

Family

ID=12289192

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2991278A Granted JPS54122943A (en) 1978-03-17 1978-03-17 Synchronizing unit

Country Status (1)

Country Link
JP (1) JPS54122943A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202515A (en) * 1985-03-06 1986-09-08 Hitachi Ltd Synchronizing circuit for asynchronous signal
JPH03257650A (en) * 1990-03-08 1991-11-18 Matsushita Electric Ind Co Ltd Latch method for parallel digital signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202515A (en) * 1985-03-06 1986-09-08 Hitachi Ltd Synchronizing circuit for asynchronous signal
JPH03257650A (en) * 1990-03-08 1991-11-18 Matsushita Electric Ind Co Ltd Latch method for parallel digital signal

Also Published As

Publication number Publication date
JPS5731167B2 (en) 1982-07-02

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