JPS54143056A - Variable frequency divider circuit - Google Patents

Variable frequency divider circuit

Info

Publication number
JPS54143056A
JPS54143056A JP5167878A JP5167878A JPS54143056A JP S54143056 A JPS54143056 A JP S54143056A JP 5167878 A JP5167878 A JP 5167878A JP 5167878 A JP5167878 A JP 5167878A JP S54143056 A JPS54143056 A JP S54143056A
Authority
JP
Japan
Prior art keywords
frequency
circuit
frequency divider
frequency division
output
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
JP5167878A
Other languages
Japanese (ja)
Other versions
JPS6041892B2 (en
Inventor
Taaki Ichise
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
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP53051678A priority Critical patent/JPS6041892B2/en
Publication of JPS54143056A publication Critical patent/JPS54143056A/en
Publication of JPS6041892B2 publication Critical patent/JPS6041892B2/en
Expired 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
    • H03K23/667—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 switching the base during a counting cycle

Abstract

PURPOSE:To obtain a high integration after maintaining a high-speed operation by constituting the input-side high-speed operation circuit by high-speed logical gates and constituting the divided low frequency circuit by I<2>L logical gates. CONSTITUTION:Pre-scaler circuit 1 which is constituted by high-speed logical gates such as ECL performs the frequency division of input signal fin by factor P or P+ or -1. After divided by auxiliary frequency divider 2, the output is subjected to frequency division by factor M in variable frequency divider 3 by external data M. Meanwhile, the frequency division output of circuit 1 is inputted to auxiliary variable frequency divider 4 and is subjected to frequency division by factor q by external data q. Then, frequency dividers 2 and 3 are constituted by I<2>L, and circuit 4 is constituted by ECL, etc. Latch circuit 5 which was integrated simultaneously with these circuits is set by the output of frequency divider 3 and is reset by the output of frequency divider 4 and issues a reset signal and a control signal to frequency divider 4 and circuit 1 respectively. Therefore, in respect to fin, P frequency division operation is repeated MN-q times after P 1 frequency division operation is repeated q times. As a result, the total number of frequency divisions for fin becomes PN M+ or -q, and variable set is possible by data M and q.
JP53051678A 1978-04-28 1978-04-28 variable frequency divider circuit Expired JPS6041892B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53051678A JPS6041892B2 (en) 1978-04-28 1978-04-28 variable frequency divider circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53051678A JPS6041892B2 (en) 1978-04-28 1978-04-28 variable frequency divider circuit

Publications (2)

Publication Number Publication Date
JPS54143056A true JPS54143056A (en) 1979-11-07
JPS6041892B2 JPS6041892B2 (en) 1985-09-19

Family

ID=12893531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53051678A Expired JPS6041892B2 (en) 1978-04-28 1978-04-28 variable frequency divider circuit

Country Status (1)

Country Link
JP (1) JPS6041892B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201342A (en) * 1981-03-20 1982-12-09 Esu Ro Kuuotsuku Pulse delay compensating device
JPS58209230A (en) * 1982-05-31 1983-12-06 Toshiba Corp Programmable counter
JPS62206925A (en) * 1986-03-05 1987-09-11 Mitsubishi Electric Corp Frequency synthesizer
JP2020136824A (en) * 2019-02-15 2020-08-31 キヤノン株式会社 Fractional frequency divider and frequency synthesizer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201342A (en) * 1981-03-20 1982-12-09 Esu Ro Kuuotsuku Pulse delay compensating device
JPS58209230A (en) * 1982-05-31 1983-12-06 Toshiba Corp Programmable counter
JPS62206925A (en) * 1986-03-05 1987-09-11 Mitsubishi Electric Corp Frequency synthesizer
JP2020136824A (en) * 2019-02-15 2020-08-31 キヤノン株式会社 Fractional frequency divider and frequency synthesizer

Also Published As

Publication number Publication date
JPS6041892B2 (en) 1985-09-19

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