FR2326800B1 - - Google Patents

Info

Publication number
FR2326800B1
FR2326800B1 FR7628665A FR7628665A FR2326800B1 FR 2326800 B1 FR2326800 B1 FR 2326800B1 FR 7628665 A FR7628665 A FR 7628665A FR 7628665 A FR7628665 A FR 7628665A FR 2326800 B1 FR2326800 B1 FR 2326800B1
Authority
FR
France
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
FR7628665A
Other versions
FR2326800A1 (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.)
Chevron USA Inc
Original Assignee
Chevron Research and Technology Co
Chevron Research Co
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 Chevron Research and Technology Co, Chevron Research Co filed Critical Chevron Research and Technology Co
Publication of FR2326800A1 publication Critical patent/FR2326800A1/fr
Application granted granted Critical
Publication of FR2326800B1 publication Critical patent/FR2326800B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V13/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices covered by groups G01V1/00 – G01V11/00
    • 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
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2101/00—Indexing scheme relating to the type of digital function generated
    • G06F2101/04—Trigonometric functions

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Geophysics (AREA)
  • Acoustics & Sound (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Geophysics And Detection Of Objects (AREA)
FR7628665A 1975-10-01 1976-09-23 Processeur numerique pour synthetiser selectivement des formes d'onde sinusoidale, c'est-a-dire approprie a la verification de geophones ou combinaisons de geophones d'un systeme d'acquisition de donnees geophysiques Granted FR2326800A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/618,550 US4039806A (en) 1975-10-01 1975-10-01 Synthesizer for testing elements of a geophysical data acquisition system

Publications (2)

Publication Number Publication Date
FR2326800A1 FR2326800A1 (fr) 1977-04-29
FR2326800B1 true FR2326800B1 (fr) 1982-03-26

Family

ID=24478181

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7628665A Granted FR2326800A1 (fr) 1975-10-01 1976-09-23 Processeur numerique pour synthetiser selectivement des formes d'onde sinusoidale, c'est-a-dire approprie a la verification de geophones ou combinaisons de geophones d'un systeme d'acquisition de donnees geophysiques

Country Status (6)

Country Link
US (1) US4039806A (fr)
JP (1) JPS5244147A (fr)
CA (1) CA1083719A (fr)
DE (1) DE2644885A1 (fr)
FR (1) FR2326800A1 (fr)
GB (1) GB1557698A (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4142245A (en) * 1977-08-22 1979-02-27 Texas Instruments Incorporated Multi-frequency digital wave synthesizer for providing analog output signals
US4192007A (en) * 1978-05-30 1980-03-04 Lorain Products Corporation Programmable ringing generator
US4276619A (en) * 1979-03-07 1981-06-30 Exxon Production Research Company Impedance and common mode rejection testing of a multi-channel seismic data gathering apparatus
US4298969A (en) * 1979-09-26 1981-11-03 Exxon Production Research Company Method and apparatus for testing the impedances of geophone channels
US4315219A (en) * 1980-04-07 1982-02-09 Canadian Patents & Development Limited Amplitude controlled digital oscillator
US4409984A (en) * 1981-02-25 1983-10-18 General Electric Company FM-Digital converter
US4417218A (en) * 1981-06-19 1983-11-22 The United States Of America As Represented By The Secretary Of The Navy Linearizing circuit for a high frequency voltage controlled oscillator
US4409587A (en) * 1982-01-27 1983-10-11 The United States Of America As Represented By The Secretary Of The Air Force Altimeter code converter
DE3216547C1 (de) * 1982-05-04 1983-10-06 Krautkraemer Gmbh Verfahren und Schaltungsvorrichtung zum Erzeugen und Veraendern einer vorbestimmten Anzahl voneinander unabhaengiger Gleichspannungen
US4525795A (en) * 1982-07-16 1985-06-25 At&T Bell Laboratories Digital signal generator
US4560961A (en) * 1983-01-26 1985-12-24 Republic Electronics, Inc. Method and means for generating pulse compression pulses
US4516084A (en) * 1983-02-18 1985-05-07 Rca Corporation Frequency synthesizer using an arithmetic frequency synthesizer and plural phase locked loops
US4584658A (en) * 1983-06-14 1986-04-22 Westinghouse Electric Corp. Stable sine wave generator
US4758971A (en) * 1984-04-27 1988-07-19 Delta Electronics, Inc. Digital signal generator
US4752902A (en) * 1985-07-08 1988-06-21 Sciteq Electronics, Inc. Digital frequency synthesizer
US4737720A (en) * 1986-01-06 1988-04-12 General Electric Company DTMF generation using pre-summed tables
US4932004A (en) * 1986-02-21 1990-06-05 Honeywell Inc. Fiber optic seismic system
US4943779A (en) * 1988-05-19 1990-07-24 Worcester Polytechnic Institute Digital sweep generator
US5039872A (en) * 1989-09-28 1991-08-13 The United States Of America As Represented By The Secretary Of Commerce Digitally synthesized audio frequency voltage source
US5081603A (en) * 1990-04-02 1992-01-14 Easton Corporation Amplitude-control system for a signal generator
US5095279A (en) * 1990-04-26 1992-03-10 Macrovision Corporation Variable frequency sine wave carrier signal generator
US5202846A (en) * 1990-12-19 1993-04-13 Hughes Aircraft Company Prime number spur reduction for digital synthesis
US5247469A (en) * 1991-05-23 1993-09-21 Proxim, Inc. Digital frequency synthesizer and method with vernier interpolation
US5237324A (en) * 1991-09-04 1993-08-17 Advanced Micro Devices, Inc. System and method for producing baseband analog modulation signals
GB9813513D0 (en) * 1998-06-24 1998-08-19 British Gas Plc Synthesising a sine wave
US9057801B2 (en) * 2012-01-11 2015-06-16 Kjt Enterprises, Inc. Geophysical data acquisition system
CN103454698B (zh) * 2013-09-11 2015-12-09 东华理工大学 直流电法勘探中三维电阻率采集系统在线故障检测系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657657A (en) * 1970-08-03 1972-04-18 William T Jefferson Digital sine wave generator
US3735269A (en) * 1971-10-29 1973-05-22 Rockland Systems Corp Digital frequency synthesizer
US3763364A (en) * 1971-11-26 1973-10-02 North American Rockwell Apparatus for storing and reading out periodic waveforms
US3877023A (en) * 1973-05-21 1975-04-08 Texas Instruments Inc Antiglitch digital to analog converter system

Also Published As

Publication number Publication date
CA1083719A (fr) 1980-08-12
DE2644885C2 (fr) 1990-03-08
DE2644885A1 (de) 1977-04-14
GB1557698A (en) 1979-12-12
FR2326800A1 (fr) 1977-04-29
US4039806A (en) 1977-08-02
JPS5244147A (en) 1977-04-06

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Legal Events

Date Code Title Description
ST Notification of lapse