JPS54102957A - Programable divider - Google Patents

Programable divider

Info

Publication number
JPS54102957A
JPS54102957A JP977578A JP977578A JPS54102957A JP S54102957 A JPS54102957 A JP S54102957A JP 977578 A JP977578 A JP 977578A JP 977578 A JP977578 A JP 977578A JP S54102957 A JPS54102957 A JP S54102957A
Authority
JP
Japan
Prior art keywords
division
fixed
speed
division ratio
ratio data
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
JP977578A
Other languages
Japanese (ja)
Inventor
Tadashi Kojima
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 JP977578A priority Critical patent/JPS54102957A/en
Priority to US06/006,490 priority patent/US4357527A/en
Priority to GB7903316A priority patent/GB2016764B/en
Priority to DE2903700A priority patent/DE2903700C2/en
Publication of JPS54102957A publication Critical patent/JPS54102957A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/193—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
    • H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Numerical Control (AREA)

Abstract

PURPOSE:To ensire the high-speed and accurate operation by leading out the control signal to be the output, which is divided by the division ratio data of the fixed digit number set up by the binary code through the coaction of the high- and low-speed division steps in the form of the division output. CONSTITUTION:High-speed division step I consists of divider 13, 15 and 17 which divide the input pulse signals in sequence with the fixed division ratio in the vertical connection relation and pulse control circuit 12, 14 and 16 which draw out the fixed pulse from the input pulse signal or from the output of each divider in accordance with the division ratio data of a higher-order digit among the fixed division ratio data of the binary code and which are located among the fixed steps. While low- speed division step II comprises divider 21, 22, 23 and 24 which divide the output of step I according to the fixed division ratio data and frequency extender 25 and 26 which deliver the control signal to drive the pulse control circuit with every division cycle. Thus, the control signals are led out with the fixed digit number division ratio data of the binary code through coation of step I and II, ensuring a high-speed operation.
JP977578A 1978-01-31 1978-01-31 Programable divider Pending JPS54102957A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP977578A JPS54102957A (en) 1978-01-31 1978-01-31 Programable divider
US06/006,490 US4357527A (en) 1978-01-31 1979-01-25 Programmable divider
GB7903316A GB2016764B (en) 1978-01-31 1979-01-31 Programmable divider
DE2903700A DE2903700C2 (en) 1978-01-31 1979-01-31 Programmable divider

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP977578A JPS54102957A (en) 1978-01-31 1978-01-31 Programable divider

Publications (1)

Publication Number Publication Date
JPS54102957A true JPS54102957A (en) 1979-08-13

Family

ID=11729613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP977578A Pending JPS54102957A (en) 1978-01-31 1978-01-31 Programable divider

Country Status (1)

Country Link
JP (1) JPS54102957A (en)

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