GB2239748B - Direct frequency synthesiser - Google Patents

Direct frequency synthesiser

Info

Publication number
GB2239748B
GB2239748B GB9000317A GB9000317A GB2239748B GB 2239748 B GB2239748 B GB 2239748B GB 9000317 A GB9000317 A GB 9000317A GB 9000317 A GB9000317 A GB 9000317A GB 2239748 B GB2239748 B GB 2239748B
Authority
GB
United Kingdom
Prior art keywords
direct frequency
frequency synthesiser
synthesiser
direct
frequency
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 - Fee Related
Application number
GB9000317A
Other versions
GB9000317D0 (en
GB2239748A (en
Inventor
Peter Henry Saul
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 Semiconductors Ltd
Plessey Co Ltd
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
Plessey Semiconductors Ltd
Plessey Co Ltd
Marconi 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 GEC Marconi Ltd, Plessey Semiconductors Ltd, Plessey Co Ltd, Marconi Co Ltd filed Critical GEC Marconi Ltd
Priority to GB9000317A priority Critical patent/GB2239748B/en
Publication of GB9000317D0 publication Critical patent/GB9000317D0/en
Publication of GB2239748A publication Critical patent/GB2239748A/en
Priority to GB9311017A priority patent/GB2265511B/en
Application granted granted Critical
Publication of GB2239748B publication Critical patent/GB2239748B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B1/00—Details
    • H03B1/04—Reducing undesired oscillations, e.g. harmonics
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • 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
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
    • G06F7/548—Trigonometric functions; Co-ordinate transformations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06J—HYBRID COMPUTING ARRANGEMENTS
    • G06J1/00—Hybrid computing arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Software Systems (AREA)
  • Fuzzy Systems (AREA)
  • Evolutionary Computation (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB9000317A 1990-01-06 1990-01-06 Direct frequency synthesiser Expired - Fee Related GB2239748B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9000317A GB2239748B (en) 1990-01-06 1990-01-06 Direct frequency synthesiser
GB9311017A GB2265511B (en) 1990-01-06 1993-05-28 Direct frequency synthesiser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9000317A GB2239748B (en) 1990-01-06 1990-01-06 Direct frequency synthesiser

Publications (3)

Publication Number Publication Date
GB9000317D0 GB9000317D0 (en) 1990-03-07
GB2239748A GB2239748A (en) 1991-07-10
GB2239748B true GB2239748B (en) 1993-12-15

Family

ID=10668938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9000317A Expired - Fee Related GB2239748B (en) 1990-01-06 1990-01-06 Direct frequency synthesiser

Country Status (1)

Country Link
GB (1) GB2239748B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469479A (en) * 1992-02-27 1995-11-21 Texas Instruments Incorporated Digital chirp synthesizer
FR2705175B1 (en) * 1993-05-12 1995-07-07 Alcatel Telspace DEVICE FOR REDUCING INTERFERING LINES OF THE OUTPUT SIGNAL OF A DIGITAL FREQUENCY SYNTHESIZER.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217127A (en) * 1988-04-07 1989-10-18 Plessey Co Plc Direct frequency synthesiser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217127A (en) * 1988-04-07 1989-10-18 Plessey Co Plc Direct frequency synthesiser

Also Published As

Publication number Publication date
GB9000317D0 (en) 1990-03-07
GB2239748A (en) 1991-07-10

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Legal Events

Date Code Title Description
730A Proceeding under section 30 patents act 1977
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040106