JPS56119532A - Digital frequency dividing circuit - Google Patents

Digital frequency dividing circuit

Info

Publication number
JPS56119532A
JPS56119532A JP2247480A JP2247480A JPS56119532A JP S56119532 A JPS56119532 A JP S56119532A JP 2247480 A JP2247480 A JP 2247480A JP 2247480 A JP2247480 A JP 2247480A JP S56119532 A JPS56119532 A JP S56119532A
Authority
JP
Japan
Prior art keywords
terminal
pulses
output
dividing circuit
frequency dividing
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
JP2247480A
Other languages
Japanese (ja)
Other versions
JPS6211814B2 (en
Inventor
Tadashi Kihara
Chihiro Takei
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 JP2247480A priority Critical patent/JPS56119532A/en
Publication of JPS56119532A publication Critical patent/JPS56119532A/en
Publication of JPS6211814B2 publication Critical patent/JPS6211814B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • H03K23/665—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by presetting

Landscapes

  • Manipulation Of Pulses (AREA)
  • Pulse Circuits (AREA)

Abstract

PURPOSE:To divide the frequency in the division ratio of an arbitary rational number, by giving the output of the one-bit delay delayed by one clock and the output of the programmable divider to the preset terminal of the programmable divider. CONSTITUTION:The pulse train input from input terminal 1 is divided in programmable divider PD3 by 1/3, and the output is fed back immediately to terminal PE of PD3 through OR gate 6. Meanwhile, bit rate multiplier BM4 outputs five pulses out of 10 input pulses, and these pulses are delayed by one bit and are fed back to terminal PE of PD3. Consequently, the period when 10 pulses are inputted to terminal IN of BM4 becomes one period of this frequency dividing circuit. During this one period, the number of pulses inputted to input terminal is 4X5+3X (10-5)=35, and the number of pulses outputted from output terminal 2 is 10. Consequently, the frequency division ratio is 35/10=3.5. Thus, the frequency dividing circuit has an arbitary frequency division ratio.
JP2247480A 1980-02-25 1980-02-25 Digital frequency dividing circuit Granted JPS56119532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2247480A JPS56119532A (en) 1980-02-25 1980-02-25 Digital frequency dividing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2247480A JPS56119532A (en) 1980-02-25 1980-02-25 Digital frequency dividing circuit

Publications (2)

Publication Number Publication Date
JPS56119532A true JPS56119532A (en) 1981-09-19
JPS6211814B2 JPS6211814B2 (en) 1987-03-14

Family

ID=12083707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2247480A Granted JPS56119532A (en) 1980-02-25 1980-02-25 Digital frequency dividing circuit

Country Status (1)

Country Link
JP (1) JPS56119532A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162599U (en) * 1984-09-29 1986-04-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162599U (en) * 1984-09-29 1986-04-26

Also Published As

Publication number Publication date
JPS6211814B2 (en) 1987-03-14

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