AU2002302925A1 - Integrating a/d converter - Google Patents

Integrating a/d converter

Info

Publication number
AU2002302925A1
AU2002302925A1 AU2002302925A AU2002302925A AU2002302925A1 AU 2002302925 A1 AU2002302925 A1 AU 2002302925A1 AU 2002302925 A AU2002302925 A AU 2002302925A AU 2002302925 A AU2002302925 A AU 2002302925A AU 2002302925 A1 AU2002302925 A1 AU 2002302925A1
Authority
AU
Australia
Prior art keywords
resistance
during
input
signal
periodic
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.)
Abandoned
Application number
AU2002302925A
Inventor
Arthur Reichmuth
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.)
Mettler Toledo Schweiz GmbH
Original Assignee
Mettler Toledo Schweiz GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7688320&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2002302925(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mettler Toledo Schweiz GmbH filed Critical Mettler Toledo Schweiz GmbH
Publication of AU2002302925A1 publication Critical patent/AU2002302925A1/en
Abandoned 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
    • H03M1/50—Analogue/digital converters with intermediate conversion to time interval
    • H03M1/504—Analogue/digital converters with intermediate conversion to time interval using pulse width modulation
    • H03M1/506—Analogue/digital converters with intermediate conversion to time interval using pulse width modulation the pulse width modulator being of the charge-balancing type

Landscapes

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

Abstract

The integrating A/D converter comprises an operation amplifier (OA), whose output and whose inverted input are interconnected by a capacitor (C). Charges can be supplied to and drawn from said capacitor via a signal input (INP) and a reference resistance (R0) that is connected to a reference voltage (Uref) during periodic segments (T1, T2) of a working period (T0). Said charges can be balanced by the modification of the periodic segments (T1, T2) in such a way that the number of clock pulses of a clock pulse signal (TCK), which elapse during one of the periodic segments, constitutes a digitally representable measurement for the magnitude of the input signal (usig) that is applied to the signal input (INP). The non-inverting input of the operation amplifier (OA) is connected to the reference voltage (Uref) via a first resistance (R1) and to the ground potential (GND) via a second resistance (R2). The reference resistance (R0) can be connected to the reference voltage (Uref) by means of a switch (SL1) during the first periodic segment (T1) and to the ground potential (GND) during the second periodic segment (T2). Provided that the two resistances (R1, R2) have the same resistance value, the power loss in the reference resistance (R0) remains constant and is independent of the magnitude and the polarity of the applied input signal (usig), thus preventing errors during signal processing.
AU2002302925A 2001-06-18 2002-06-18 Integrating a/d converter Abandoned AU2002302925A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10128942.1 2001-06-18
DE10128942A DE10128942B4 (en) 2001-06-18 2001-06-18 Integrating A / D converter
PCT/IB2002/002240 WO2002103914A2 (en) 2001-06-18 2002-06-18 Integrating a/d converter

Publications (1)

Publication Number Publication Date
AU2002302925A1 true AU2002302925A1 (en) 2003-01-02

Family

ID=7688320

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2002302925A Abandoned AU2002302925A1 (en) 2001-06-18 2002-06-18 Integrating a/d converter

Country Status (6)

Country Link
EP (1) EP1400020B1 (en)
AT (1) ATE303673T1 (en)
AU (1) AU2002302925A1 (en)
DE (2) DE10128942B4 (en)
LU (1) LU90905B1 (en)
WO (1) WO2002103914A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7379001B2 (en) 2003-09-22 2008-05-27 Tc Electric A/S Self-oscillating A/D-converter
DE102004023145A1 (en) 2004-05-07 2005-11-24 Endress + Hauser Wetzer Gmbh + Co. Kg Device for analog / digital conversion of a measuring voltage
DE102012102081B3 (en) * 2012-03-13 2013-06-20 Sartorius Weighing Technology Gmbh Integrating A / D converter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6198023A (en) * 1984-10-19 1986-05-16 Matsushita Electric Ind Co Ltd A/d converting circuit
GB8514861D0 (en) * 1985-06-12 1985-07-17 Silicon Arrays Ltd Dual-slope integration systems
DE3642495A1 (en) * 1986-12-12 1988-06-23 Martin Hans Juergen Dipl Ing F Analogue/digital converter, particularly for electromechanical scales
KR920009206B1 (en) * 1990-01-25 1992-10-14 삼성전자 주식회사 Integration type audio/digital converter control circuit
DE4220408A1 (en) * 1991-06-20 1992-12-24 Mannesmann Ag Analogue=digital converter using charge balance principle - has integration element supplied with analogue voltage and reference voltage via low-pass filters
DE4405380A1 (en) * 1994-02-19 1995-08-31 Bizerba Gmbh & Co Kg Integrating analogue=to=digital converter e.g. for weighing appts.

Also Published As

Publication number Publication date
DE10128942B4 (en) 2007-01-11
WO2002103914A3 (en) 2003-06-05
LU90905B1 (en) 2003-10-13
ATE303673T1 (en) 2005-09-15
EP1400020A2 (en) 2004-03-24
DE50204100D1 (en) 2005-10-06
DE10128942A1 (en) 2003-01-02
WO2002103914A2 (en) 2002-12-27
EP1400020B1 (en) 2005-08-31

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase