JPS5698011A - Automatic gain controller of loran receiver - Google Patents

Automatic gain controller of loran receiver

Info

Publication number
JPS5698011A
JPS5698011A JP15505879A JP15505879A JPS5698011A JP S5698011 A JPS5698011 A JP S5698011A JP 15505879 A JP15505879 A JP 15505879A JP 15505879 A JP15505879 A JP 15505879A JP S5698011 A JPS5698011 A JP S5698011A
Authority
JP
Japan
Prior art keywords
value
attenuator
agc
agc value
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.)
Granted
Application number
JP15505879A
Other languages
Japanese (ja)
Other versions
JPS6239710B2 (en
Inventor
Minoru Handa
Mitsuhiro Inouchi
Masahiko Kimura
Hisatoku Hirasawa
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.)
Furuno Electric Co Ltd
Original Assignee
Furuno Electric Co Ltd
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 Furuno Electric Co Ltd filed Critical Furuno Electric Co Ltd
Priority to JP15505879A priority Critical patent/JPS5698011A/en
Publication of JPS5698011A publication Critical patent/JPS5698011A/en
Publication of JPS6239710B2 publication Critical patent/JPS6239710B2/ja
Granted legal-status Critical Current

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
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver

Landscapes

  • Position Fixing By Use Of Radio Waves (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To increase the dynamic range, by turning on and off the attenuator provided at the input terminal of the received signal in coupling to the AGC. CONSTITUTION:The AGC value is proportional to the gain of the amplifying circuit, and the gain is set to 100dB when the AGC value is 1,000. When the gain of the amplifying circuit reaches the upper limit value 80dB, the AGC value of 800 is detected by the attenuator on/off control circuit 13. Thus the attenuator 7 is turned off. In this case, the AGC value is corrected to the value with 300 reduced when the amount of attenuation of the attenuator 7 is 30dB. Then the AGC value increases as the signal is weakened. When the received signal becomes strong up to the limit of the dynamic range, the AGC value becomes to 400. In this instant, the circuit 13 turns on the attenuator 7, and at the same time the AGC value is corrected to the value with 300 increased.
JP15505879A 1979-11-29 1979-11-29 Automatic gain controller of loran receiver Granted JPS5698011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15505879A JPS5698011A (en) 1979-11-29 1979-11-29 Automatic gain controller of loran receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15505879A JPS5698011A (en) 1979-11-29 1979-11-29 Automatic gain controller of loran receiver

Publications (2)

Publication Number Publication Date
JPS5698011A true JPS5698011A (en) 1981-08-07
JPS6239710B2 JPS6239710B2 (en) 1987-08-25

Family

ID=15597741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15505879A Granted JPS5698011A (en) 1979-11-29 1979-11-29 Automatic gain controller of loran receiver

Country Status (1)

Country Link
JP (1) JPS5698011A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62173811U (en) * 1986-04-23 1987-11-05
WO1998010514A1 (en) * 1996-09-05 1998-03-12 Mitsubishi Denki Kabushiki Kaisha Gain controlling method and receiver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497856A (en) * 1972-03-29 1974-01-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497856A (en) * 1972-03-29 1974-01-24

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62173811U (en) * 1986-04-23 1987-11-05
WO1998010514A1 (en) * 1996-09-05 1998-03-12 Mitsubishi Denki Kabushiki Kaisha Gain controlling method and receiver

Also Published As

Publication number Publication date
JPS6239710B2 (en) 1987-08-25

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