GB1151505A - Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements - Google Patents

Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements

Info

Publication number
GB1151505A
GB1151505A GB3477465A GB3477465A GB1151505A GB 1151505 A GB1151505 A GB 1151505A GB 3477465 A GB3477465 A GB 3477465A GB 3477465 A GB3477465 A GB 3477465A GB 1151505 A GB1151505 A GB 1151505A
Authority
GB
United Kingdom
Prior art keywords
frequency divider
divider circuit
improvements relating
circuit arrangements
variable 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.)
Expired
Application number
GB3477465A
Inventor
David John Martin
Richard David Young
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB3477465A priority Critical patent/GB1151505A/en
Priority to NL6610964A priority patent/NL6610964A/xx
Priority to NO16425666A priority patent/NO120431B/no
Priority to DK411966A priority patent/DK117576C/en
Priority to DE1966P0040182 priority patent/DE1298557B/en
Publication of GB1151505A publication Critical patent/GB1151505A/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
    • H03K23/662—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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/60—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers
    • G06F7/68—Methods or arrangements for performing computations using a digital non-denominational number representation, i.e. number representation without radix; Computing devices using combinations of denominational and non-denominational quantity representations, e.g. using difunction pulse trains, STEELE computers, phase computers using pulse rate multipliers or dividers pulse rate multipliers or dividers per se
    • 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
    • H03L7/197—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—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 numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Manipulation Of Pulses (AREA)
  • Complex Calculations (AREA)

Abstract

1151505 Electronic counters PLESSEY CO Ltd 8 Aug 1966 [13 Aug 1965] 34774/65 Headings G4D D7X D6Y D6C1 and D6C2 The dividing ratio of a frequency-divider can vary by one from one cycle to another whereby over a given number of cycles the effective ratio includes a fraction. The several denominations 1-5 of a decimal counter are set to count to predetermined digits, the attainment of its digit by the highest denomination 5 operating a reset stage 6 for the next denomination 4 and so on down to the lowest reset stage 6 which additionally issues an output pulse. The output of one of the reset stages 6 is also fed to a pre-set binary-coded decimal counter 9 which is arranged to issue from 0-9 pulses, each of which inhibits gate 8 so that the input from 7 is effectively reduced. The dividing ratio is thereby increased by this decimal fraction.
GB3477465A 1965-08-13 1965-08-13 Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements Expired GB1151505A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB3477465A GB1151505A (en) 1965-08-13 1965-08-13 Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements
NL6610964A NL6610964A (en) 1965-08-13 1966-08-04
NO16425666A NO120431B (en) 1965-08-13 1966-08-10
DK411966A DK117576C (en) 1965-08-13 1966-08-10 Frequency components with variable frequency ratio.
DE1966P0040182 DE1298557B (en) 1965-08-13 1966-08-12 Circuit arrangement for a variable electronic frequency divider

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3477465A GB1151505A (en) 1965-08-13 1965-08-13 Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements

Publications (1)

Publication Number Publication Date
GB1151505A true GB1151505A (en) 1969-05-07

Family

ID=10369785

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3477465A Expired GB1151505A (en) 1965-08-13 1965-08-13 Improvements relating to Variable Ratio Frequency Divider Circuit Arrangements

Country Status (5)

Country Link
DE (1) DE1298557B (en)
DK (1) DK117576C (en)
GB (1) GB1151505A (en)
NL (1) NL6610964A (en)
NO (1) NO120431B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213636A2 (en) * 1985-09-03 1987-03-11 Nec Corporation Frequency synthesizer of a phase-locked type with a sampling circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT354620B (en) * 1977-12-27 1980-01-25 Rodler Ing Hans ARRANGEMENT FOR TREATMENT WITH INTERFERENCE CURRENTS
DE2900612C2 (en) * 1979-01-09 1983-02-24 Hans 8228 Freilassing Rodler Device for interference current therapy

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL263301A (en) * 1960-04-12
DE1167074B (en) * 1960-10-11 1964-04-02 Licentia Gmbh Decadal counter with presetting or preselection
NL293848A (en) * 1962-06-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0213636A2 (en) * 1985-09-03 1987-03-11 Nec Corporation Frequency synthesizer of a phase-locked type with a sampling circuit
EP0213636A3 (en) * 1985-09-03 1988-10-19 Nec Corporation Frequency synthesizer of a phase-locked type with a sampling circuit

Also Published As

Publication number Publication date
NL6610964A (en) 1967-02-14
DK117576C (en) 1970-10-05
DK117576B (en) 1970-05-11
DE1298557B (en) 1969-07-03
NO120431B (en) 1970-10-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees