JPS554133A - Variable divider circuit - Google Patents

Variable divider circuit

Info

Publication number
JPS554133A
JPS554133A JP7687778A JP7687778A JPS554133A JP S554133 A JPS554133 A JP S554133A JP 7687778 A JP7687778 A JP 7687778A JP 7687778 A JP7687778 A JP 7687778A JP S554133 A JPS554133 A JP S554133A
Authority
JP
Japan
Prior art keywords
circuit
output
divider
terminal
monostable multivibrator
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
JP7687778A
Other languages
Japanese (ja)
Inventor
Masahiro Watanabe
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 JP7687778A priority Critical patent/JPS554133A/en
Publication of JPS554133A publication Critical patent/JPS554133A/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
    • H03K23/64—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
    • H03K23/662—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 adding or suppressing pulses

Landscapes

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

Abstract

PURPOSE:To improve greatly the S/N ratio of the output of a PLL synthesizer by controlling the operation of a phase inverter circuit at every single-counting cycle of a variable divider by using a NOR circuit, monostable multivibrator, AND circuit, FF, and OR-ELSE circuit. CONSTITUTION:To variable divider 1, an integer part of N/2 is set as a dividing ratio and a signal inputted to this divider 1 is phase-inverted by phase inverter circuit 2 and then supplied to monostable multivibrator 4 via NOR circuit 3. The output of this monostable multivibrator 4 is applied to terminal PE of divider 1 and also to one terminal of AND circuit 5, whose output is sent to terminal CL of FF6; and output Q of FF6 and the input signal are both OR-ELSE circuit 7, the output of which is applied to circuit 1. Now, the S/N ratio of a used PLL synthesizer can greatly be improved, by controlling the operation of circuit 2 at every single-counting cycle of the divider.
JP7687778A 1978-06-23 1978-06-23 Variable divider circuit Pending JPS554133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7687778A JPS554133A (en) 1978-06-23 1978-06-23 Variable divider circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7687778A JPS554133A (en) 1978-06-23 1978-06-23 Variable divider circuit

Publications (1)

Publication Number Publication Date
JPS554133A true JPS554133A (en) 1980-01-12

Family

ID=13617855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7687778A Pending JPS554133A (en) 1978-06-23 1978-06-23 Variable divider circuit

Country Status (1)

Country Link
JP (1) JPS554133A (en)

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