GB1550798A - High-pass filters - Google Patents

High-pass filters

Info

Publication number
GB1550798A
GB1550798A GB1014078A GB1014078A GB1550798A GB 1550798 A GB1550798 A GB 1550798A GB 1014078 A GB1014078 A GB 1014078A GB 1014078 A GB1014078 A GB 1014078A GB 1550798 A GB1550798 A GB 1550798A
Authority
GB
United Kingdom
Prior art keywords
pass filters
filters
pass
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
GB1014078A
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.)
Western Geophysical Company of America
Original Assignee
Western Geophysical Company of America
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
Priority claimed from US05/576,943 external-priority patent/US3996553A/en
Priority claimed from US05/664,617 external-priority patent/US4072923A/en
Priority claimed from US05/664,615 external-priority patent/US4005273A/en
Priority claimed from US05/664,614 external-priority patent/US4031506A/en
Priority claimed from US05/664,616 external-priority patent/US4031504A/en
Priority claimed from US05/664,618 external-priority patent/US4092629A/en
Priority claimed from US05/665,151 external-priority patent/US4023140A/en
Application filed by Western Geophysical Company of America filed Critical Western Geophysical Company of America
Publication of GB1550798A publication Critical patent/GB1550798A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/22—Transmitting seismic signals to recording or processing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/24—Recording seismic data
    • G01V1/245—Amplitude control for seismic recording
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/008—Networks using time-varying elements, e.g. N-path filters with variable switch closing time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
GB1014078A 1975-05-12 1976-05-05 High-pass filters Expired GB1550798A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US05/576,943 US3996553A (en) 1975-05-12 1975-05-12 Seismic data telemetering system
US66515076A 1976-03-08 1976-03-08
US05/664,617 US4072923A (en) 1976-03-08 1976-03-08 Multichannel seismic telemeter system and array former
US05/664,615 US4005273A (en) 1976-03-08 1976-03-08 Multiplexer offset removal circuit
US05/664,614 US4031506A (en) 1976-03-08 1976-03-08 Multiplexer commutated high pass filter
US05/664,616 US4031504A (en) 1976-03-08 1976-03-08 Gain ranging amplifier system
US05/664,618 US4092629A (en) 1976-03-08 1976-03-08 Decentralized seismic data processing system
US05/665,151 US4023140A (en) 1975-05-12 1976-03-08 Seismic data telemetering system

Publications (1)

Publication Number Publication Date
GB1550798A true GB1550798A (en) 1979-08-22

Family

ID=27575486

Family Applications (5)

Application Number Title Priority Date Filing Date
GB1849976A Expired GB1550701A (en) 1975-05-12 1976-05-05 Seismic data processing system and method
GB946278A Expired GB1550797A (en) 1975-05-12 1976-05-05 Seismic data collection
GB1732978A Expired GB1550799A (en) 1975-05-12 1976-05-05 Gain ramging amplifier system
GB1014078A Expired GB1550798A (en) 1975-05-12 1976-05-05 High-pass filters
GB2867078A Expired GB1550800A (en) 1975-05-12 1976-05-05 Seismic data processing systems

Family Applications Before (3)

Application Number Title Priority Date Filing Date
GB1849976A Expired GB1550701A (en) 1975-05-12 1976-05-05 Seismic data processing system and method
GB946278A Expired GB1550797A (en) 1975-05-12 1976-05-05 Seismic data collection
GB1732978A Expired GB1550799A (en) 1975-05-12 1976-05-05 Gain ramging amplifier system

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2867078A Expired GB1550800A (en) 1975-05-12 1976-05-05 Seismic data processing systems

Country Status (10)

Country Link
BE (1) BE841638A (en)
CH (1) CH617017A5 (en)
CY (1) CY1053A (en)
DE (1) DE2620513C2 (en)
FR (3) FR2356162A1 (en)
GB (5) GB1550701A (en)
HK (1) HK22180A (en)
KE (1) KE3039A (en)
MY (1) MY8100051A (en)
ZM (1) ZM5776A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter
EP2757390A1 (en) * 2013-01-21 2014-07-23 Sercel Acquisition device provided with means for detecting a disconnection of a set of at least one analog seismic sensor

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471088A1 (en) * 1979-12-07 1981-06-12 Inst Francais Du Petrole DEVICE FOR TRANSMITTING DATA BETWEEN DATA ACQUISITION DEVICES AND A RECORDING DEVICE
GB2074392B (en) * 1980-04-03 1984-06-06 Kokusai Denshin Denwa Co Ltd Method and apparatus for burying an underwater cable
FR2496902A1 (en) * 1980-12-24 1982-06-25 Saint Gaudens Atel Meca Reinforced sheathing for extended seismic probe segments - to increase sensitivity by minimising spurious noise
EP0101301A1 (en) * 1982-08-13 1984-02-22 Oxford Medical Systems Limited Apparatus and methods for multi-channel signal recording
FR2538194B1 (en) * 1982-12-16 1985-10-11 Inst Francais Du Petrole METHOD FOR REMOTE CONTROL OF SIGNAL ACQUISITION APPARATUS USING A NARROW BANDWIDTH TRANSMISSION CHANNEL AND DEVICE FOR IMPLEMENTING SAME
DE3248114A1 (en) * 1982-12-24 1984-07-05 Krautkrämer GmbH, 5000 Köln METHOD AND DEVICE FOR DIGITIZING AND STORING ULTRASONIC INFORMATION
GB2137750A (en) * 1983-03-31 1984-10-10 Teledyne Exploration Co Modular Seismic Cable Section
EP0134684A3 (en) * 1983-08-18 1986-01-15 Mobil Oil Corporation Low noise digital seismic streamer and method of marine seismic exploration
GB8332867D0 (en) * 1983-12-09 1984-02-08 Nat Nuclear Corp Ltd Apparatus for sensing
GB2162638A (en) * 1984-08-03 1986-02-05 Britoil Plc Vibration isolation section for a seismic streamer
GB2162637B (en) * 1984-08-03 1987-12-16 Britoil Plc Seismic streamer section
GB2164180B (en) * 1984-09-06 1988-03-30 Jones Automation Limited J Remote monitoring apparatus
FR2689647B1 (en) * 1992-04-01 1997-09-05 Inst Francais Du Petrole SYSTEM FOR ACQUIRING AND CENTRALIZING DATA OBTAINED BY A PERMANENT INSTALLATION FOR EXPLORING A GEOLOGICAL TRAINING.
EP1701459A1 (en) * 2005-03-09 2006-09-13 Institute of Electronics and Computer Science of Latvian University Method for data acquisition from multiple sources of analog signals
US7813222B2 (en) 2007-02-01 2010-10-12 Ion Geophysical Corporation Apparatus and method for compressing seismic data
BRPI0811766A2 (en) * 2007-05-17 2014-11-11 Octio Geophysical As APPARATUS AND METHOD FOR COLLECTING GEOPHYSICAL INFORMATION
CN112953387A (en) * 2021-02-26 2021-06-11 江苏上频高新科技有限公司 Crystal oscillator vibration compensation circuit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723309A (en) * 1950-03-10 1955-11-08 Int Standard Electric Corp Telephone system
DE1259968B (en) * 1962-07-28 1968-02-01 Telefunken Patent Method and arrangement for the automatic control of an amplifier
FR1433856A (en) * 1965-05-13 1966-04-01 Marconi Co Ltd Enhancements to automatic gain control devices
FR1472241A (en) * 1966-01-28 1967-03-10 Texaco Development Corp Amplifier device
US3518628A (en) * 1966-11-10 1970-06-30 Electronic Specialty Co Systems and methods for communicating with a plurality of remote units
FR1549197A (en) * 1967-03-13 1968-12-13
FR2185194A6 (en) * 1972-05-19 1973-12-28 Geophysique Cie Gle
US3881166A (en) * 1973-05-07 1975-04-29 Geophysical Systems Corp Data array network systems
FR2237552A5 (en) * 1973-07-10 1975-02-07 Sercel Rech Const Elect
US3887897A (en) * 1973-07-23 1975-06-03 Texas Instruments Inc System for changing seismic detection array lengths
US3988689A (en) * 1975-02-07 1976-10-26 National Semiconductor Corporation Offset corrected amplifier
US4024492A (en) * 1976-02-09 1977-05-17 Geosource Inc. Seismic array

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter
EP2757390A1 (en) * 2013-01-21 2014-07-23 Sercel Acquisition device provided with means for detecting a disconnection of a set of at least one analog seismic sensor
US9304219B2 (en) 2013-01-21 2016-04-05 Sercel Acquisition device provided with means for detecting a disconnection of a set of at least one analog seismic sensor

Also Published As

Publication number Publication date
FR2377046B1 (en) 1982-12-17
MY8100051A (en) 1981-12-31
CH617017A5 (en) 1980-04-30
HK22180A (en) 1980-05-02
DE2620513A1 (en) 1977-02-17
GB1550800A (en) 1979-08-22
ZM5776A1 (en) 1977-04-21
CY1053A (en) 1980-08-01
DE2620513C2 (en) 1984-11-22
KE3039A (en) 1980-04-25
FR2344178A1 (en) 1977-10-07
BE841638A (en) 1976-11-10
GB1550799A (en) 1979-08-22
GB1550797A (en) 1979-08-22
FR2356162B1 (en) 1983-03-18
FR2344178B1 (en) 1982-04-30
GB1550701A (en) 1979-08-15
FR2377046A1 (en) 1978-08-04
FR2356162A1 (en) 1978-01-20

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930505