JPS5489469A - Frequency divider circuit - Google Patents

Frequency divider circuit

Info

Publication number
JPS5489469A
JPS5489469A JP15764377A JP15764377A JPS5489469A JP S5489469 A JPS5489469 A JP S5489469A JP 15764377 A JP15764377 A JP 15764377A JP 15764377 A JP15764377 A JP 15764377A JP S5489469 A JPS5489469 A JP S5489469A
Authority
JP
Japan
Prior art keywords
clock
frequency divider
output
terminal
divider circuit
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
JP15764377A
Other languages
Japanese (ja)
Inventor
Tatsuo Wada
Toshiomi Yabu
Koichi Yamada
Tadashi Yoshino
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15764377A priority Critical patent/JPS5489469A/en
Publication of JPS5489469A publication Critical patent/JPS5489469A/en
Pending 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
    • H03K23/58—Gating or clocking signals not applied to all stages, i.e. asynchronous counters
    • H03K23/588—Combination of a synchronous and an asynchronous counter

Landscapes

  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To obtain a sure-operation frequency divider by resetting FF in each stage required for counting n-1 by a sufficiently resettable pulse in a 1/n frequency divider circuit dependent upon an asynchronous counter. CONSTITUTION:Clock pulse A of frequency f0 is inputted to terminal 7 of asynchronous counter 12; and for example, in case of n=7, when counter 12 constituted by T-FF 8, 9 and 10 counts 6, output E of NAND gate 11 becomes L. Then, D-FF where clock inversion A anti-phase to clock A and output E of gate 11 are inputted to the CL terminal and the D terminal respectively resets FF 8, 9 and 10 during one cycle of clock inversion A. As a result, a period corresponding to seven clocks A can be obtained at output D of FF 10, and a required frequency division is performed, and further, a reset pulse corresponding to one cycle of clock A is obtained to make operation sure.
JP15764377A 1977-12-27 1977-12-27 Frequency divider circuit Pending JPS5489469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15764377A JPS5489469A (en) 1977-12-27 1977-12-27 Frequency divider circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15764377A JPS5489469A (en) 1977-12-27 1977-12-27 Frequency divider circuit

Publications (1)

Publication Number Publication Date
JPS5489469A true JPS5489469A (en) 1979-07-16

Family

ID=15654198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15764377A Pending JPS5489469A (en) 1977-12-27 1977-12-27 Frequency divider circuit

Country Status (1)

Country Link
JP (1) JPS5489469A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04118355U (en) * 1991-04-04 1992-10-22 住友ベークライト株式会社 Can body connection tray

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224458A (en) * 1975-08-20 1977-02-23 Matsushita Electric Ind Co Ltd Counter circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224458A (en) * 1975-08-20 1977-02-23 Matsushita Electric Ind Co Ltd Counter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04118355U (en) * 1991-04-04 1992-10-22 住友ベークライト株式会社 Can body connection tray

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