GB1257520A - - Google Patents

Info

Publication number
GB1257520A
GB1257520A GB1257520DA GB1257520A GB 1257520 A GB1257520 A GB 1257520A GB 1257520D A GB1257520D A GB 1257520DA GB 1257520 A GB1257520 A GB 1257520A
Authority
GB
United Kingdom
Prior art keywords
control
attenuator
amplifier
signal
gain
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
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 filed Critical
Publication of GB1257520A publication Critical patent/GB1257520A/en
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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/534—Details of non-pulse systems
    • G01S7/5345—Gain control of receivers
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/529—Gain of receiver varied automatically during pulse-recurrence period
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/534—Details of non-pulse systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

1,257,520. Automatic gain control; sonar systems. THOMSON C.S.F. 4 Dec., 1969 [11 Dec., 1968], No. 59370/69. Headings H3Q, H4D and H4R. An automatic gain control for signal supplied by a sonar system comprises an attenuator 1 whose loss is controlled by signals derived from the output of the amplifier 2 via two control circuits. One control circuit includes a lowpass filter 5 following a rectifier 3, to provide a rising gain to compensate for the approximately exponential fall in signal level with distance along the reflecting surface, and hence with time, while the other control circuit includes a voltage selector 11 to pass only control signals exceeding a predetermined amplitude and thus provide a fast-acting compression of signal spikes likely to saturate the amplifier. The signals from the two control circuits are fed to control the impedance of a f.e.t. S in the attenuator 1 via a maximum voltage selector formed by the diodes D 3 and D 4 . Instead of controlling the loss in the attenuator the control signal may control the gain of amplifier 2.
GB1257520D 1968-12-11 1969-12-04 Expired GB1257520A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR177686 1968-12-11

Publications (1)

Publication Number Publication Date
GB1257520A true GB1257520A (en) 1971-12-22

Family

ID=8658165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257520D Expired GB1257520A (en) 1968-12-11 1969-12-04

Country Status (6)

Country Link
BE (1) BE742465A (en)
DE (1) DE1961916B2 (en)
DK (1) DK126279B (en)
GB (1) GB1257520A (en)
NL (1) NL6918282A (en)
SE (1) SE351299B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123231A (en) * 1982-06-17 1984-01-25 Ates Componenti Elettron Gain control of audio-amplifying systems
DE4103069A1 (en) * 1990-02-01 1991-08-08 Mitsubishi Electric Corp OBSTACLE SENSOR WORKING WITH ULTRASONIC WAVE
WO2013110389A1 (en) * 2012-01-24 2013-08-01 Robert Bosch Gmbh Environment detection device and related method for determining the position and/or motion of an object
EP2852057A1 (en) * 2013-09-20 2015-03-25 Nxp B.V. An audio and ultrasound signal processing circuit and an ultrasound signal processing circuit, and associated methods
EP2811316A3 (en) * 2013-06-07 2015-11-25 Robert Bosch Gmbh Device for environment sensor system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2151348C3 (en) * 1971-10-15 1981-03-12 Fried. Krupp Gmbh, 4300 Essen Circuit arrangement in an echo sounder for distinguishing between echo signals
JPS5912145B2 (en) * 1977-10-21 1984-03-21 古野電気株式会社 Radar and similar equipment
AU6425500A (en) 1999-06-22 2001-01-09 Hormann Kg Antriebstechnik Locking device and door-drive device comprising the same, for a door operated bya motor assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123231A (en) * 1982-06-17 1984-01-25 Ates Componenti Elettron Gain control of audio-amplifying systems
DE4103069A1 (en) * 1990-02-01 1991-08-08 Mitsubishi Electric Corp OBSTACLE SENSOR WORKING WITH ULTRASONIC WAVE
WO2013110389A1 (en) * 2012-01-24 2013-08-01 Robert Bosch Gmbh Environment detection device and related method for determining the position and/or motion of an object
EP2811316A3 (en) * 2013-06-07 2015-11-25 Robert Bosch Gmbh Device for environment sensor system
EP2852057A1 (en) * 2013-09-20 2015-03-25 Nxp B.V. An audio and ultrasound signal processing circuit and an ultrasound signal processing circuit, and associated methods
CN104469607A (en) * 2013-09-20 2015-03-25 恩智浦有限公司 An audio and ultrasound signal processing circuit and an ultrasound signal processing circuit, and associated methods
US9892631B2 (en) 2013-09-20 2018-02-13 Nxp B.V. Audio and ultrasound signal processing circuit and an ultrasound signal processing circuit, and associated methods
CN104469607B (en) * 2013-09-20 2019-05-10 恩智浦有限公司 Audio and ultrasonic signal processing circuit, ultrasonic signal processing circuit and correlation technique

Also Published As

Publication number Publication date
SE351299B (en) 1972-11-20
DE1961916B2 (en) 1973-09-27
NL6918282A (en) 1970-06-15
DE1961916A1 (en) 1970-07-09
DE1961916C3 (en) 1974-04-25
DK126279B (en) 1973-06-25
BE742465A (en) 1970-05-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee