JPS5781731A - Frequency dividing circuit - Google Patents

Frequency dividing circuit

Info

Publication number
JPS5781731A
JPS5781731A JP55159284A JP15928480A JPS5781731A JP S5781731 A JPS5781731 A JP S5781731A JP 55159284 A JP55159284 A JP 55159284A JP 15928480 A JP15928480 A JP 15928480A JP S5781731 A JPS5781731 A JP S5781731A
Authority
JP
Japan
Prior art keywords
circuit
output
register
stages
ratio
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
JP55159284A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Takagi
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 JP55159284A priority Critical patent/JPS5781731A/en
Publication of JPS5781731A publication Critical patent/JPS5781731A/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
    • H03K23/40—Gating or clocking signals applied to all stages, i.e. synchronous counters
    • H03K23/50—Gating or clocking signals applied to all stages, i.e. synchronous counters using bi-stable regenerative trigger circuits
    • H03K23/54—Ring counters, i.e. feedback shift register counters

Landscapes

  • Electrophonic Musical Instruments (AREA)

Abstract

PURPOSE:To increase the high-pitched tone range of an electronic musical instrument and at the same time to obtain a divided output of an accurate 50% duty, by increasing the clock frequency with use of a feedback register of the maximum period. CONSTITUTION:A clock signal of 4.0048MHz is applied to an input terminal 11 and turned into a forward/backward phase signal through an inverter 12 to drive a shift register 13 of 9 stages. At the same time, the outputs of the 4th and 9th stages of the register 13 are applied to an exclusive OR circuit 14, and the output of the circuit 14 is fed back to the first stage. Thus a feedback register of the maximum period is obtained. The register 13 has a division ratio of 2<9>-1= 511 and applies a clock signal and a specific output among the stage outputs to an AND circuit 15. Then the register 13 is set at an early state with the output of the circuit 15 to obtain a prescribed ratio of division. The output of the circuit 15 is applied to a 1/2 dividing circuit 19 to obtain an output signal having a 50% duty ratio.
JP55159284A 1980-11-11 1980-11-11 Frequency dividing circuit Pending JPS5781731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55159284A JPS5781731A (en) 1980-11-11 1980-11-11 Frequency dividing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55159284A JPS5781731A (en) 1980-11-11 1980-11-11 Frequency dividing circuit

Publications (1)

Publication Number Publication Date
JPS5781731A true JPS5781731A (en) 1982-05-21

Family

ID=15690424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55159284A Pending JPS5781731A (en) 1980-11-11 1980-11-11 Frequency dividing circuit

Country Status (1)

Country Link
JP (1) JPS5781731A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4992970A (en) * 1972-10-31 1974-09-04
JPS5267559A (en) * 1975-12-02 1977-06-04 Toshiba Corp Counter
JPS52131450A (en) * 1976-04-28 1977-11-04 Sharp Corp Up-down counter
JPS5344165A (en) * 1976-10-04 1978-04-20 Toshiba Corp Programable counter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4992970A (en) * 1972-10-31 1974-09-04
JPS5267559A (en) * 1975-12-02 1977-06-04 Toshiba Corp Counter
JPS52131450A (en) * 1976-04-28 1977-11-04 Sharp Corp Up-down counter
JPS5344165A (en) * 1976-10-04 1978-04-20 Toshiba Corp Programable counter

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