JPS6481524A - Frequency division circuit - Google Patents

Frequency division circuit

Info

Publication number
JPS6481524A
JPS6481524A JP23981487A JP23981487A JPS6481524A JP S6481524 A JPS6481524 A JP S6481524A JP 23981487 A JP23981487 A JP 23981487A JP 23981487 A JP23981487 A JP 23981487A JP S6481524 A JPS6481524 A JP S6481524A
Authority
JP
Japan
Prior art keywords
inversion
frequency division
frequency
clock signal
hold mode
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.)
Pending
Application number
JP23981487A
Other languages
Japanese (ja)
Inventor
Minoru Nagata
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP23981487A priority Critical patent/JPS6481524A/en
Publication of JPS6481524A publication Critical patent/JPS6481524A/en
Pending legal-status Critical Current

Links

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To attain accurate frequency division even when the frequency of a clock signal gets higher by starting the inversion while a D latch circuit is still in the hold mode. CONSTITUTION:When a half period of the clock signal is shorter than the time required to invert D latch circuits 21-24, for example, the D latch circuit 23 starts the inversion already at a period being substantially in the hold mode. Even if the through-mode for the inversion passes and the hold mode comes again, the inversion is continued. Thus, when the frequency of the clock signal is high and the half period is shorter than the time required for the inversion of the D latch circuits 21-24, a sufficient inversion time is given to the D latch circuits 21-24. As a result, accurate frequency division is applied and the upper limit of the frequency division enable frequency is increased.
JP23981487A 1987-09-24 1987-09-24 Frequency division circuit Pending JPS6481524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23981487A JPS6481524A (en) 1987-09-24 1987-09-24 Frequency division circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23981487A JPS6481524A (en) 1987-09-24 1987-09-24 Frequency division circuit

Publications (1)

Publication Number Publication Date
JPS6481524A true JPS6481524A (en) 1989-03-27

Family

ID=17050246

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23981487A Pending JPS6481524A (en) 1987-09-24 1987-09-24 Frequency division circuit

Country Status (1)

Country Link
JP (1) JPS6481524A (en)

Similar Documents

Publication Publication Date Title
EP0300757A3 (en) Time measurement apparatus
GB8625074D0 (en) Oscillators & processor circuits
DE3871425D1 (en) INTEGRATED CIRCUIT ARRANGEMENT FOR MONITORING AN INCORPORATED OSCILLATOR.
EP0263377A3 (en) High-speed pulse swallower
FR2360937A1 (en) EXTENSION AND HOLDING RHYTHM CIRCUIT
JPS6481524A (en) Frequency division circuit
EP0278718A3 (en) Time variant frequency correction technique
JPS5255361A (en) Variable frequency oscillator
JPS53139456A (en) Clock driver circuit
HK62596A (en) Crystal oscillator circuit
JPS55121511A (en) Variation system for output voltage of power unit
JPS57194378A (en) Test circuit of electronic clock
JPS5291352A (en) 2-phase clock circuit
JPS5534518A (en) Lsi parameter setting system
JPS56140722A (en) Noise eliminating circuit
JPS5373047A (en) Generation circuit for timing signal
FR2433263A1 (en) Control circuit for flip=flop - has inverter with two NOR circuits, OR circuits and flip=flop using time signal (BE 8.2.80)
JPS5768929A (en) Flip-flop circuit
JPS553216A (en) Gate circuit
JPS5511624A (en) Holding device of multiple selection signal
JPS55106389A (en) Crystal watch
JPS6449425A (en) Frequency dividing circuit
JPS5423572A (en) Electronic wristwatch with alarm
JPS5258348A (en) Sampling circuit
JPS5635065A (en) Measuring unit of threshold value