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JPS56169409A - Logarithmic amplifier - Google Patents

Logarithmic amplifier

Info

Publication number
JPS56169409A
JPS56169409A JP7315180A JP7315180A JPS56169409A JP S56169409 A JPS56169409 A JP S56169409A JP 7315180 A JP7315180 A JP 7315180A JP 7315180 A JP7315180 A JP 7315180A JP S56169409 A JPS56169409 A JP S56169409A
Authority
JP
Japan
Prior art keywords
signal
logarithmic
amplifier
input
delay
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
JP7315180A
Other languages
Japanese (ja)
Inventor
Toshio Shirasaka
Mutsuo Hashiguchi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7315180A priority Critical patent/JPS56169409A/en
Publication of JPS56169409A publication Critical patent/JPS56169409A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude
    • H03G11/08—Limiting rate of change of amplitude

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

PURPOSE:To obtain a wide dynamic range and to reduce the distortion, by providing a signal amplifier and a logarithmic compressor to add a logarithmic compressor output signal at an adder, and providing a phase compensating means among input signals to the adder among the input terminals of the adder from the signal amplifier. CONSTITUTION:An echo signal having a wide dynamic range as an input signal SI is inputted to a logarithmic amplifier 20. Delay lines are used for the 1st-3rd delay elements 17-19 and 6dB of attenuation is made to take matching to the atenuation of the signal. Further, the amplification corresponding to the 1st amplifier 8-the 4th amplifier 11 is made. Moreover, the delay time of a delay element 19 is set so that the signal phase fed to the logarithmic compressor 15 and the signal phase fed to a logarithmic compressor 14 and obtained through the delay element 19 for the output of the amplifier 10 can be coincided. Similarly, the delay elements 17, 18 set a delay time so that the input and the signal phase of the logarithmic compressor 15 are coincided at the input of logarithmic compressors 12, 13. The outputs of the logarithmic compressors 12-15 thus obtained are added 16 and outputted.
JP7315180A 1980-05-31 1980-05-31 Logarithmic amplifier Pending JPS56169409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7315180A JPS56169409A (en) 1980-05-31 1980-05-31 Logarithmic amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7315180A JPS56169409A (en) 1980-05-31 1980-05-31 Logarithmic amplifier

Publications (1)

Publication Number Publication Date
JPS56169409A true JPS56169409A (en) 1981-12-26

Family

ID=13509889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7315180A Pending JPS56169409A (en) 1980-05-31 1980-05-31 Logarithmic amplifier

Country Status (1)

Country Link
JP (1) JPS56169409A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822045A (en) * 1981-07-30 1983-02-09 株式会社島津製作所 Ultrasonic diagnostic apparatus
JPS60134670A (en) * 1983-11-28 1985-07-17 アールシーエー　トムソン　ライセンシング　コーポレイシヨン video signal processing equipment
JPS62137006U (en) * 1986-02-20 1987-08-28
JPH05160657A (en) * 1991-06-03 1993-06-25 Internatl Business Mach Corp <Ibm> Signal converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822045A (en) * 1981-07-30 1983-02-09 株式会社島津製作所 Ultrasonic diagnostic apparatus
JPS60134670A (en) * 1983-11-28 1985-07-17 アールシーエー　トムソン　ライセンシング　コーポレイシヨン video signal processing equipment
JPS62137006U (en) * 1986-02-20 1987-08-28
JPH05160657A (en) * 1991-06-03 1993-06-25 Internatl Business Mach Corp <Ibm> Signal converter

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