FR2049691A5 - - Google Patents

Info

Publication number
FR2049691A5
FR2049691A5 FR7017770A FR7017770A FR2049691A5 FR 2049691 A5 FR2049691 A5 FR 2049691A5 FR 7017770 A FR7017770 A FR 7017770A FR 7017770 A FR7017770 A FR 7017770A FR 2049691 A5 FR2049691 A5 FR 2049691A5
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
FR7017770A
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.)
Unisys Group Services Ltd
Sperry Corp
Original Assignee
Sperry Rand Ltd
Sperry Rand Corp
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 Sperry Rand Ltd, Sperry Rand Corp filed Critical Sperry Rand Ltd
Application granted granted Critical
Publication of FR2049691A5 publication Critical patent/FR2049691A5/fr
Expired 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/24—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems
    • G01S1/245—Details of receivers cooperating therewith, e.g. determining positive zero crossing of third cycle in LORAN-C
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/06—Frequency selective two-port networks including resistors
    • H03H7/07—Bridged T-filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Networks Using Active Elements (AREA)
  • Noise Elimination (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
FR7017770A 1969-05-16 1970-05-15 Expired FR2049691A5 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82536369A 1969-05-16 1969-05-16

Publications (1)

Publication Number Publication Date
FR2049691A5 true FR2049691A5 (fr) 1971-03-26

Family

ID=25243829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7017770A Expired FR2049691A5 (fr) 1969-05-16 1970-05-15

Country Status (5)

Country Link
US (1) US3562675A (fr)
JP (1) JPS501856B1 (fr)
DE (1) DE2023197A1 (fr)
FR (1) FR2049691A5 (fr)
GB (1) GB1264945A (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783397A (en) * 1968-09-27 1974-01-01 Itt Selection and processing system for signals, including frequency discriminator
US3696252A (en) * 1970-11-20 1972-10-03 Motorola Inc Active filter for selecting and controlling signals
GB1425019A (en) * 1972-11-30 1976-02-18 Bookdeal Electronics Ltd Electronic phase-sensitive detector circuit arrangements
US4016471A (en) * 1973-05-11 1977-04-05 Canon Kabushiki Kaisha Level detection system having a band-pass characteristic and a servo system including the same
CA1000617A (en) * 1973-05-17 1976-11-30 Ray M. Dolby Compressors, expanders and noise reduction systems
US3944937A (en) * 1973-12-06 1976-03-16 Matsushita Electric Industrial Co., Ltd. Broad-band signal transmitting device using transformer
FR2336005A1 (fr) * 1975-12-18 1977-07-15 Ibm France Filtre numerique auto-adaptatif
US4091236A (en) * 1976-09-07 1978-05-23 The University Of Akron Automatically tunable notch filter and method for suppression of acoustical feedback
GB1585488A (en) * 1977-05-11 1981-03-04 Gen Electric Apparatus for monitoring high alternating voltages
JPS622038B2 (fr) * 1979-12-26 1987-01-17 Daiyamondo Shamurotsuku Tekunorojiizu Sa
GB2071452B (en) * 1980-02-11 1984-04-04 Decca Ltd Adjustable and selective electrical filters and methods oftuning them
US4549312A (en) * 1980-02-29 1985-10-22 Digital Marine Electronics Corporation Radio receiver with automatic interference and distortion compensation
CA1202702A (fr) * 1982-09-03 1986-04-01 Gordon R. Lang Dispositif et methode de reduction des instabilites de phase
GB2304241B (en) * 1983-08-09 1997-06-18 British Aerospace Electromagnetic interference protection
JPS60214617A (ja) * 1984-04-11 1985-10-26 Hitachi Ltd フイルタ集積回路
US4954785A (en) * 1989-04-12 1990-09-04 Sundstrand Corporation Auto tracking notch filter using switched capacitors to measure harmonic distortion and noise contained in a signal source
US5331299A (en) * 1990-02-23 1994-07-19 Massachusetts Institute Of Technology Adaptive tracking notch filter system
US5438304A (en) * 1990-12-19 1995-08-01 Jennings; Peter R. Automatically tuned notch filter for providing bandpass and band reject signals

Also Published As

Publication number Publication date
DE2023197A1 (de) 1971-01-07
JPS501856B1 (fr) 1975-01-22
US3562675A (en) 1971-02-09
GB1264945A (fr) 1972-02-23

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Legal Events

Date Code Title Description
ST Notification of lapse