FR2363115A1 - Oscillateur a commande numerique - Google Patents

Oscillateur a commande numerique

Info

Publication number
FR2363115A1
FR2363115A1 FR7725544A FR7725544A FR2363115A1 FR 2363115 A1 FR2363115 A1 FR 2363115A1 FR 7725544 A FR7725544 A FR 7725544A FR 7725544 A FR7725544 A FR 7725544A FR 2363115 A1 FR2363115 A1 FR 2363115A1
Authority
FR
France
Prior art keywords
tau
time
periods
memory
digital control
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.)
Granted
Application number
FR7725544A
Other languages
English (en)
Other versions
FR2363115B1 (fr
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.)
Thales Nederland BV
Original Assignee
Thales Nederland BV
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 Thales Nederland BV filed Critical Thales Nederland BV
Publication of FR2363115A1 publication Critical patent/FR2363115A1/fr
Application granted granted Critical
Publication of FR2363115B1 publication Critical patent/FR2363115B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/50—Systems of measurement, based on relative movement of the target
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/904—Doppler compensation systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

Oscillateur à commande numérique. L'oscillateur comprend une mémoire emmagasinant les demi-périodes Ti (i = 1, 2... n) de fréquences correspondantes fi = 1/2Ti à produire et une chaîne à couplage rétroactif connectée à la mémoire et dans laquelle, d'une part, les demi-périodes reprises de la mémoire sont toutes, sur la base d'une répartition dans le temps, chaque fois réduites d'une valeur de temps fixe tau et, d'autre part, également sur la base d'une répartition dans le temps, aussitôt que les valeurs résiduelles ainsi obtenues Ai,l = Ti - k i,l tau sont inférieures à tau , ces valeurs résiduelles sont augmentées des demi-périodes correspondantes Ti et chaque valeur ainsi augmentée est de façon répétée réduite du temps fixe tau . L'invention est applicable à un émetteur/récepteur sonar.
FR7725544A 1976-08-26 1977-08-22 Oscillateur a commande numerique Granted FR2363115A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7609475,A NL184861C (nl) 1976-08-26 1976-08-26 Digitaal bestuurde oscillator.

Publications (2)

Publication Number Publication Date
FR2363115A1 true FR2363115A1 (fr) 1978-03-24
FR2363115B1 FR2363115B1 (fr) 1983-02-18

Family

ID=19826798

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7725544A Granted FR2363115A1 (fr) 1976-08-26 1977-08-22 Oscillateur a commande numerique

Country Status (12)

Country Link
US (1) US4169256A (fr)
JP (1) JPS5912147B2 (fr)
AU (1) AU505292B2 (fr)
BE (1) BE858023A (fr)
CA (1) CA1078473A (fr)
DE (1) DE2738020A1 (fr)
FR (1) FR2363115A1 (fr)
GB (1) GB1582187A (fr)
IT (1) IT1080117B (fr)
NL (1) NL184861C (fr)
NO (1) NO148047C (fr)
SE (2) SE7709474L (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305151A (en) * 1979-05-31 1981-12-08 Sperry Corporation Digital discriminator for determining frequency error of an oscillator
FR2525774B1 (fr) * 1982-04-23 1986-02-07 Thomson Csf Dispositif de filtrage adaptatif de signaux recus par un sonar actif pour la rejection de la reverberation
JPH01162341U (fr) * 1988-04-28 1989-11-13
US7733149B2 (en) * 2008-06-11 2010-06-08 Pmc-Sierra, Inc. Variable-length digitally-controlled delay chain with interpolation-based tuning

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675146A (en) * 1971-03-08 1972-07-04 J Michael Langham Digital variable frequency oscillator
FR2172566A5 (fr) * 1972-02-18 1973-09-28 Thomson Csf
US3798564A (en) * 1971-03-08 1974-03-19 J Langham Digital frequency multiplier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370266A (en) * 1965-09-13 1968-02-20 Hughes Aircraft Co Frequency synthesizing system
US3810038A (en) * 1972-11-14 1974-05-07 Itt System for deriving from a single stable oscillator a plurality of different selectable local oscillator signal
SE372393B (fr) * 1973-11-22 1974-12-16 Ericsson Telefon Ab L M

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675146A (en) * 1971-03-08 1972-07-04 J Michael Langham Digital variable frequency oscillator
US3798564A (en) * 1971-03-08 1974-03-19 J Langham Digital frequency multiplier
FR2172566A5 (fr) * 1972-02-18 1973-09-28 Thomson Csf

Also Published As

Publication number Publication date
DE2738020A1 (de) 1978-03-09
NL184861B (nl) 1989-06-16
BE858023A (nl) 1977-12-16
NO148047C (no) 1983-08-10
NL7609475A (nl) 1978-02-28
SE421728B (sv) 1982-01-25
DE2738020C2 (fr) 1987-03-12
JPS5327452A (en) 1978-03-14
AU2812177A (en) 1979-03-01
NO148047B (no) 1983-04-18
IT1080117B (it) 1985-05-16
US4169256A (en) 1979-09-25
NO772833L (no) 1978-02-28
SE7709474L (sv) 1978-02-27
FR2363115B1 (fr) 1983-02-18
AU505292B2 (en) 1979-11-15
NL184861C (nl) 1989-11-16
JPS5912147B2 (ja) 1984-03-21
GB1582187A (en) 1980-12-31
CA1078473A (fr) 1980-05-27

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Legal Events

Date Code Title Description
CA Change of address
CD Change of name or company name
TP Transmission of property
ST Notification of lapse