GB1550798A - High-pass filters - Google Patents
High-pass filtersInfo
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Geology (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Oceanography (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
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 | |
US05/664,616 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 |
US05/664,614 US4031506A (en) | 1976-03-08 | 1976-03-08 | Multiplexer commutated high pass filter |
US05/665,151 US4023140A (en) | 1975-05-12 | 1976-03-08 | Seismic data telemetering system |
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 |
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 |
---|---|---|---|
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 |
GB1732978A Expired GB1550799A (en) | 1975-05-12 | 1976-05-05 | Gain ramging amplifier system |
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 |
Family Applications After (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2867078A Expired GB1550800A (en) | 1975-05-12 | 1976-05-05 | Seismic data processing systems |
GB1732978A Expired GB1550799A (en) | 1975-05-12 | 1976-05-05 | Gain ramging amplifier system |
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 |
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) | GB1550798A (en) |
HK (1) | HK22180A (en) |
KE (1) | KE3039A (en) |
MY (1) | MY8100051A (en) |
ZM (1) | ZM5776A1 (en) |
Cited By (2)
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 (18)
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 |
DE3248114C2 (en) * | 1982-12-24 | 1987-04-30 | Krautkrämer GmbH, 5040 Brühl | Method and device for digitizing and storing ultrasound information |
GB2137750A (en) * | 1983-03-31 | 1984-10-10 | Teledyne Exploration Co | Modular Seismic Cable Section |
GB2145226A (en) * | 1983-08-18 | 1985-03-20 | Mobil Oil Corp | 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 |
GB2162637B (en) * | 1984-08-03 | 1987-12-16 | Britoil Plc | Seismic streamer section |
GB2162638A (en) * | 1984-08-03 | 1986-02-05 | Britoil Plc | Vibration isolation section for a seismic streamer |
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 |
US8077740B2 (en) | 2007-02-01 | 2011-12-13 | INOVA, Ltd. | Apparatus and method for reducing noise in seismic data |
US8830790B2 (en) | 2007-05-17 | 2014-09-09 | Octio Geophysical As | Apparatus and method for collecting geophysical information |
CN113655520B (en) * | 2021-01-20 | 2024-05-03 | 长江勘测规划设计研究有限责任公司 | Multichannel double-frequency surface wave automatic acquisition station and acquisition system |
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)
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 |
-
1976
- 1976-05-05 GB GB1014078A patent/GB1550798A/en not_active Expired
- 1976-05-05 GB GB2867078A patent/GB1550800A/en not_active Expired
- 1976-05-05 GB GB1732978A patent/GB1550799A/en not_active Expired
- 1976-05-05 GB GB1849976A patent/GB1550701A/en not_active Expired
- 1976-05-05 CY CY105376A patent/CY1053A/en unknown
- 1976-05-05 GB GB946278A patent/GB1550797A/en not_active Expired
- 1976-05-07 DE DE19762620513 patent/DE2620513C2/en not_active Expired
- 1976-05-10 ZM ZM5776A patent/ZM5776A1/en unknown
- 1976-05-10 BE BE1007361A patent/BE841638A/en not_active IP Right Cessation
- 1976-05-11 CH CH591676A patent/CH617017A5/en not_active IP Right Cessation
- 1976-05-12 FR FR7614268A patent/FR2356162A1/en active Granted
-
1977
- 1977-04-13 FR FR7711092A patent/FR2344178A1/en active Granted
-
1978
- 1978-03-10 FR FR7807019A patent/FR2377046A1/en active Granted
-
1980
- 1980-04-05 KE KE303980A patent/KE3039A/en unknown
- 1980-04-24 HK HK22180A patent/HK22180A/en unknown
-
1981
- 1981-12-30 MY MY8100051A patent/MY8100051A/en unknown
Cited By (3)
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 |
---|---|
FR2356162B1 (en) | 1983-03-18 |
MY8100051A (en) | 1981-12-31 |
GB1550797A (en) | 1979-08-22 |
FR2344178B1 (en) | 1982-04-30 |
CY1053A (en) | 1980-08-01 |
KE3039A (en) | 1980-04-25 |
FR2377046B1 (en) | 1982-12-17 |
CH617017A5 (en) | 1980-04-30 |
GB1550701A (en) | 1979-08-15 |
GB1550799A (en) | 1979-08-22 |
DE2620513C2 (en) | 1984-11-22 |
FR2344178A1 (en) | 1977-10-07 |
HK22180A (en) | 1980-05-02 |
DE2620513A1 (en) | 1977-02-17 |
FR2377046A1 (en) | 1978-08-04 |
GB1550800A (en) | 1979-08-22 |
FR2356162A1 (en) | 1978-01-20 |
ZM5776A1 (en) | 1977-04-21 |
BE841638A (en) | 1976-11-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1547591A (en) | Filter devices | |
YU232676A (en) | Filter unit | |
GB1541051A (en) | Oil filter | |
JPS5223868A (en) | Dust filter | |
GB1550176A (en) | Auxiliary filters | |
JPS51111969A (en) | Filter instrument | |
JPS51143959A (en) | Liquid filter | |
JPS51111965A (en) | Liquid filter | |
JPS5283026A (en) | Combblike filter | |
GB1550798A (en) | High-pass filters | |
JPS526175A (en) | Filter | |
JPS51143961A (en) | Filter | |
JPS5267237A (en) | Piezooelectric filter | |
GB1555252A (en) | Cigarette filters | |
GB1552338A (en) | Filtering apparatus | |
HK85384A (en) | Tobacco-smoke filter | |
GB1552378A (en) | Filters | |
JPS521992A (en) | Filter unit | |
HK87379A (en) | Filter device | |
PH12346A (en) | Filter | |
AU1160276A (en) | Electro-mechanical filter | |
GB1553108A (en) | Filtering devices | |
GB1550883A (en) | Band-pass filters | |
JPS5271767A (en) | Filter | |
GB1541616A (en) | Filter elecments |
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 |