JPS56137720A - Receiving circuit for amplitude-modulated wave - Google Patents

Receiving circuit for amplitude-modulated wave

Info

Publication number
JPS56137720A
JPS56137720A JP4071580A JP4071580A JPS56137720A JP S56137720 A JPS56137720 A JP S56137720A JP 4071580 A JP4071580 A JP 4071580A JP 4071580 A JP4071580 A JP 4071580A JP S56137720 A JPS56137720 A JP S56137720A
Authority
JP
Japan
Prior art keywords
level
output
exceeds
agc
exercised
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
JP4071580A
Other languages
Japanese (ja)
Other versions
JPS6231854B2 (en
Inventor
Takemasa Hirashita
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.)
Anritsu Corp
Original Assignee
Anritsu 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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP4071580A priority Critical patent/JPS56137720A/en
Publication of JPS56137720A publication Critical patent/JPS56137720A/en
Publication of JPS6231854B2 publication Critical patent/JPS6231854B2/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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To reduce automatically the low-frequency output of a disturbing wave component, by decreasing the output level of a low-frequency amplifier on detecting an AGC voltage exceeding the level at which normal automatic gain control is exercised. CONSTITUTION:When a desired wave is received, AGC is exercised, so that AGC voltage V will never reach level L. When a disturbing wave is inputted, on the other hand, AGC is not exercised and if it exceeds input level D', output IO of intermediate frequency amplifier 6 exceeds level C'. If the input level exceeds M, however, AGC voltage exceeds detection level L, so that detecting circuit 13 outputs a signal on detecting that. The detection signal is inputted to low-frequency amplifier 8 via control circuit 15. The output of amplifier 8 is therefore reduced automatically and the output of an unnecessary disturbing wave component is reduced.
JP4071580A 1980-03-29 1980-03-29 Receiving circuit for amplitude-modulated wave Granted JPS56137720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4071580A JPS56137720A (en) 1980-03-29 1980-03-29 Receiving circuit for amplitude-modulated wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4071580A JPS56137720A (en) 1980-03-29 1980-03-29 Receiving circuit for amplitude-modulated wave

Publications (2)

Publication Number Publication Date
JPS56137720A true JPS56137720A (en) 1981-10-27
JPS6231854B2 JPS6231854B2 (en) 1987-07-10

Family

ID=12588273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4071580A Granted JPS56137720A (en) 1980-03-29 1980-03-29 Receiving circuit for amplitude-modulated wave

Country Status (1)

Country Link
JP (1) JPS56137720A (en)

Also Published As

Publication number Publication date
JPS6231854B2 (en) 1987-07-10

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