JPS56134812A - Logarithmic amplifying circuit - Google Patents

Logarithmic amplifying circuit

Info

Publication number
JPS56134812A
JPS56134812A JP3721980A JP3721980A JPS56134812A JP S56134812 A JPS56134812 A JP S56134812A JP 3721980 A JP3721980 A JP 3721980A JP 3721980 A JP3721980 A JP 3721980A JP S56134812 A JPS56134812 A JP S56134812A
Authority
JP
Japan
Prior art keywords
high frequency
amplifying circuit
amplifiers
amplifier
level signal
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.)
Pending
Application number
JP3721980A
Other languages
Japanese (ja)
Inventor
Yasumitsu Tani
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP3721980A priority Critical patent/JPS56134812A/en
Publication of JPS56134812A publication Critical patent/JPS56134812A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/001—Volume compression or expansion in amplifiers without controlling loop

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To prevent a high frequency amplifier from being saturated to suppress the low-level signal, by slicing the high frequency signal by a slicer so that the low-level signal of the high frequency signal is left as it is and by applying the sliced result to the high frequency amplifier. CONSTITUTION:High frequency amplifiers RFA11, RFA21, RFA31 and RFA41 are cascaded to form an amplifying circuit. Outputs of amplifiers RFA11, RFA21 and RFA31 are applied to the amplifying circuit consisting of slicer SL31 and amplifier RFA32, the amplifying circuit consisting of slicers SL21 and SL22 and amplifiers RFA22 and RFA23, and the amplifying circuit consisting of slicers SL11-SL13 and amplifiers RFA12-RFA14 respectively. As a result, the low-level signal is not suppressed, and only the high-level signal is suppressed, and each amplifier is not saturated to amplify the high frequency signal.
JP3721980A 1980-03-24 1980-03-24 Logarithmic amplifying circuit Pending JPS56134812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3721980A JPS56134812A (en) 1980-03-24 1980-03-24 Logarithmic amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3721980A JPS56134812A (en) 1980-03-24 1980-03-24 Logarithmic amplifying circuit

Publications (1)

Publication Number Publication Date
JPS56134812A true JPS56134812A (en) 1981-10-21

Family

ID=12491473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3721980A Pending JPS56134812A (en) 1980-03-24 1980-03-24 Logarithmic amplifying circuit

Country Status (1)

Country Link
JP (1) JPS56134812A (en)

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