JPS55150619A - Nonlinear coder - Google Patents

Nonlinear coder

Info

Publication number
JPS55150619A
JPS55150619A JP5761279A JP5761279A JPS55150619A JP S55150619 A JPS55150619 A JP S55150619A JP 5761279 A JP5761279 A JP 5761279A JP 5761279 A JP5761279 A JP 5761279A JP S55150619 A JPS55150619 A JP S55150619A
Authority
JP
Japan
Prior art keywords
signal
nonlinear
amplifier
converter
constitution
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
JP5761279A
Other languages
Japanese (ja)
Inventor
Masahiro Yamashita
Takashi Matsuda
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 JP5761279A priority Critical patent/JPS55150619A/en
Publication of JPS55150619A publication Critical patent/JPS55150619A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To simplify constitution by coding an input analogue signal in a linear A/D converter after amplifying this signal is a variable gain amplifier and by making the signal nonlinear in the stage of the variable gain amplifier. CONSTITUTION:It is supposed that the value obtained by amplifying input analogue signal Ain with a minimum gain by variable gain amplifier 41 and converting this signal to a three-bit digital signal by A/D converter 42 is (011). Control gate circuit 43 where this digital signal is input indicates to amplifier 41 that this signal belongs to prescribed (10) out of nonlinear classifications, and stores (10) in upper bit stage 44-1 of register 44. Amplifier 41 is set to a gain so that signal Ain of the (10) level may be magnified up to the maximum dynamic range of converter 42, and this signal is held in a sample hole circuit and so on and is digitized with a current level scale and is stored in lower bit stage 44-2 of register 44 as it is and is coded to a nonlinear code. Thus, constitution can be simplified.
JP5761279A 1979-05-12 1979-05-12 Nonlinear coder Pending JPS55150619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5761279A JPS55150619A (en) 1979-05-12 1979-05-12 Nonlinear coder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5761279A JPS55150619A (en) 1979-05-12 1979-05-12 Nonlinear coder

Publications (1)

Publication Number Publication Date
JPS55150619A true JPS55150619A (en) 1980-11-22

Family

ID=13060679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5761279A Pending JPS55150619A (en) 1979-05-12 1979-05-12 Nonlinear coder

Country Status (1)

Country Link
JP (1) JPS55150619A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62178017A (en) * 1986-01-31 1987-08-05 Sony Corp Gain control circuit
WO2006055014A1 (en) * 2004-11-01 2006-05-26 Medtronic, Inc. Data compression method for implantable medical devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62178017A (en) * 1986-01-31 1987-08-05 Sony Corp Gain control circuit
WO2006055014A1 (en) * 2004-11-01 2006-05-26 Medtronic, Inc. Data compression method for implantable medical devices
US7288066B2 (en) 2004-11-01 2007-10-30 Medtronic, Inc. Data compression method for implantable medical devices

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