WO1990003694A3 - Process and device for converting an analog input signal - Google Patents

Process and device for converting an analog input signal Download PDF

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Publication number
WO1990003694A3
WO1990003694A3 PCT/EP1989/001128 EP8901128W WO9003694A3 WO 1990003694 A3 WO1990003694 A3 WO 1990003694A3 EP 8901128 W EP8901128 W EP 8901128W WO 9003694 A3 WO9003694 A3 WO 9003694A3
Authority
WO
WIPO (PCT)
Prior art keywords
input signal
value
exponential
converting
analog input
Prior art date
Application number
PCT/EP1989/001128
Other languages
German (de)
French (fr)
Other versions
WO1990003694A2 (en
Inventor
C David Bustance
Paul Lidbetter
Stephen Douglas
David Kempson
Original Assignee
Siemens Ag Oesterreich
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 Siemens Ag Oesterreich filed Critical Siemens Ag Oesterreich
Publication of WO1990003694A2 publication Critical patent/WO1990003694A2/en
Publication of WO1990003694A3 publication Critical patent/WO1990003694A3/en

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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
    • H03M1/186—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedforward mode, i.e. by determining the range to be selected directly from the input signal
    • H03M1/187—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging in feedforward mode, i.e. by determining the range to be selected directly from the input signal using an auxiliary analogue/digital converter

Abstract

An input signal (ES) is converted to a 20-bit output value (AW) in exponential form. To this end, a first multiplying digital/analog converter (MDAC1) is used, by means of an exponential value (EW), as a digitally controlled amplifier of a scanning signal (AS) derived from the input signal (ES). The exponential value (EW) is produced during scanning of the input signal (ES) and used to continuously control the amplification stage. The exponential value (EW) is an approximation to the scanning signal (AS) and forms the exponent of the output value (AW). It is fed to an output memory (OL) together with the mantissa value (MW) derived from the scanning signal (AS).
PCT/EP1989/001128 1988-09-29 1989-09-26 Process and device for converting an analog input signal WO1990003694A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP88309067A EP0365717A1 (en) 1988-09-29 1988-09-29 Method and apparatus for the conversion of an analogous input signal
EP88309067.2 1988-09-29

Publications (2)

Publication Number Publication Date
WO1990003694A2 WO1990003694A2 (en) 1990-04-05
WO1990003694A3 true WO1990003694A3 (en) 1990-09-07

Family

ID=8200231

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/001128 WO1990003694A2 (en) 1988-09-29 1989-09-26 Process and device for converting an analog input signal

Country Status (2)

Country Link
EP (1) EP0365717A1 (en)
WO (1) WO1990003694A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006058963A1 (en) * 2006-12-14 2008-06-19 Straussmann, Jürgen, Dipl.-Ing. Digital coding method and device for carrying out the method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051522A1 (en) * 1980-10-23 1982-05-12 Etablissement public dit: INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE Mutant of hemorrhagic septicemia virus, vaccine containing it and process for its preparation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051522A1 (en) * 1980-10-23 1982-05-12 Etablissement public dit: INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE Mutant of hemorrhagic septicemia virus, vaccine containing it and process for its preparation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electronic Design, Band 32, Nr. 18, 6. September 1984, R. BURRIER et al.: "Floating-Point Converter uses Hardware to get a 20-Bit Dynamic Range", seiten 175-186 siehe seite 176, rechte spalte - seite 178, rechte spalte, zeile 6; figur 1 in der anmeldung erwahnt *

Also Published As

Publication number Publication date
WO1990003694A2 (en) 1990-04-05
EP0365717A1 (en) 1990-05-02

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