[go: up one dir, main page]

WO2008031683A1 - Circuit comprenant un convertisseur de signal commandable - Google Patents

Circuit comprenant un convertisseur de signal commandable Download PDF

Info

Publication number
WO2008031683A1
WO2008031683A1 PCT/EP2007/058437 EP2007058437W WO2008031683A1 WO 2008031683 A1 WO2008031683 A1 WO 2008031683A1 EP 2007058437 W EP2007058437 W EP 2007058437W WO 2008031683 A1 WO2008031683 A1 WO 2008031683A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
circuit
converter
input signal
signal converter
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.)
Ceased
Application number
PCT/EP2007/058437
Other languages
German (de)
English (en)
Inventor
Oliver Schatz
Leopold Beer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2008031683A1 publication Critical patent/WO2008031683A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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

Definitions

  • the invention is based on a circuit having an input signal, a signal converter and an output signal, wherein the output signal by means of the
  • Signal converter from the input signal can be displayed.
  • Micro-electro-mechanical components in particular micromechanical sensors, often consist of a measuring element and an evaluation circuit.
  • the evaluation circuit prepares the measured variable received by the measuring element, in which it is transformed, for example, from a capacitance change into a voltage signal, amplified and converted in an analogue-digital manner.
  • the evaluation circuit finally outputs a defined output signal.
  • the energy requirement of the processing and thus large parts of the evaluation circuit is far greater than the energy required to maintain the function of the measuring element alone.
  • the evaluation circuit is always in operation, even if the input variable does not change over time. The energy requirement of the evaluation circuit is thus a determining and avoidable share of the total energy requirements of a sensor that can reduce the duration of operational readiness in battery-powered devices.
  • the invention is based on a circuit having an input signal, a signal converter and an output signal, wherein the output signal can be displayed by means of the signal converter from the input signal.
  • the essence of the invention is that the circuit has a rating unit, by means of which the signal converter is controllable in dependence on a change of the input signal.
  • the operation of the circuit can be adjusted by the input signal according to its requirements.
  • Assessment unit is controllable such that when a change in the input signal of the signal converter is turned on or even with a constant input signal of the signal converter is turned off.
  • the evaluation unit is only operated when the input signal changes.
  • energy for the operation of the circuit can be saved.
  • circuit has a clocking.
  • this provides a measure of time in which all the essential components of the circuit operate, in particular in which the input signal is evaluated for a change and accordingly the signal converter is influenced.
  • the circuit has a memory in which the output signal is storable.
  • the last output signal thus formed is always available, even if the signal converter is switched off, for example, or the circuit is in a different state in that no current output signal is currently being formed.
  • the output signal stored in the memory always represents a current signal corresponding to the input signal
  • An advantageous embodiment provides that the input signal is an analog signal, the output signal is a digital signal and the signal converter is an analog-to-digital converter.
  • An advantageous embodiment provides that the input signal, the signal of a micromechanical sensor, in particular a micromechanical sensor with capacitive measuring means, is.
  • measured values of micromechanical sensors with such a circuit can be read out in a particularly energy-saving manner.
  • Figure 1 shows a first embodiment of a circuit according to the invention with a controllable signal converter
  • FIG. 2 shows a second exemplary embodiment of a circuit according to the invention with a controllable signal converter.
  • FIG. 1 shows a first exemplary embodiment of a circuit according to the invention with a controllable signal converter. Shown is a circuit having an input signal 10, a rating unit 20, a signal converter 30 and a
  • Output signal 40 The input signal 10 is fed to the evaluation unit 20 and evaluated there for a signal change. This assessment may for example be based on a change over time of the input signal 10 itself, or on a change from a reference value. The decision as to whether there is a signal change may be subject to a threshold value 15 for a minimum of a change or else to a tolerance. The threshold 15 may be programmable. It can be set internally or set externally or can be fed.
  • the evaluation unit 20 outputs either the signal change YES or the signal change NO in this example. The signal YES or NO is supplied to the signal converter 30. If the signal YES is active, the signal converter 30 is switched on or left in the switched-on state.
  • the signal converter 30 is switched off or left in the off state.
  • the input signal 10 is supplied directly or indirectly to the signal converter 30. Indirect delivery of the input signal 10 may mean, for example, that the input signal 10 is still amplified or processed in some way. in the - A -
  • Signal converter 30 the input signal 10 is converted into an output signal 40.
  • This example is an analog-to-digital conversion of the signal. Under conversion can be understood in an alternative embodiment of the invention but also a different kind of signal processing of the input signal 10 to the output signal 40.
  • the signal converter 30 is in the on state at an output the
  • FIG. 2 shows a second exemplary embodiment of a circuit according to the invention with a controllable signal converter.
  • This alternative embodiment of the invention provides that the input signal 10 in parallel signal paths of both the evaluation unit
  • the output signal 40 is stored in a memory 50, so that it is also available when the signal converter 30 is in the off state or just for any other reason no output signal 40 provides.
  • Embodiment can also be realized in a development of the first embodiment.
  • the inventive circuit according to the embodiments described above, but not limited to this, is particularly suitable as part of an evaluation circuit for micromechanical sensors.
  • the input signal 10 corresponds to a sensor element near a measuring element. Changes in this sensor signal can be detected and depending on the evaluation or certain parts thereof switched on and off.
  • the evaluation circuit is thus operated, for example, only when a signal change has taken place and consumes only then energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

L'invention concerne un circuit comprenant un signal (10) d'entrée, un convertisseur (30) de signal et un signal (40) de sortie. Selon l'invention, le signal (40) de sortie peut être représenté à partir du signal (10) d'entrée au moyen du convertisseur (30) de signal. L'objet de l'invention se caractérise en ce que le circuit présente une unité (20) d'évaluation au moyen de laquelle le convertisseur (30) de signal peut être commandé en fonction d'une modification du signal (10) d'entrée.
PCT/EP2007/058437 2006-09-13 2007-08-15 Circuit comprenant un convertisseur de signal commandable Ceased WO2008031683A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610043017 DE102006043017A1 (de) 2006-09-13 2006-09-13 Schaltung mit einem steuerbaren Signalwandler
DE102006043017.4 2006-09-13

Publications (1)

Publication Number Publication Date
WO2008031683A1 true WO2008031683A1 (fr) 2008-03-20

Family

ID=38669870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/058437 Ceased WO2008031683A1 (fr) 2006-09-13 2007-08-15 Circuit comprenant un convertisseur de signal commandable

Country Status (2)

Country Link
DE (1) DE102006043017A1 (fr)
WO (1) WO2008031683A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5710527A (en) * 1980-06-20 1982-01-20 Toshiba Corp Time axis restoring system for sampling series by adaptive type sampling system
US20030201927A1 (en) * 2002-04-24 2003-10-30 Takamoto Watanabe Analog-to-digital conversion method and device
DE10314789A1 (de) * 2003-04-01 2004-10-28 Infineon Technologies Ag Analog-Digital-Wandler
US6864817B1 (en) * 2003-12-30 2005-03-08 Freescale Semiconductor, Inc. Signaling dependent adaptive analog-to-digital converter (ADC) system and method of using same
US20060049972A1 (en) * 2002-07-31 2006-03-09 Augusto Carlos J R Asynchronous serial analog-to-digital converter methodology having dynamic adjustment of the bandwidth

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5710527A (en) * 1980-06-20 1982-01-20 Toshiba Corp Time axis restoring system for sampling series by adaptive type sampling system
US20030201927A1 (en) * 2002-04-24 2003-10-30 Takamoto Watanabe Analog-to-digital conversion method and device
US20060049972A1 (en) * 2002-07-31 2006-03-09 Augusto Carlos J R Asynchronous serial analog-to-digital converter methodology having dynamic adjustment of the bandwidth
DE10314789A1 (de) * 2003-04-01 2004-10-28 Infineon Technologies Ag Analog-Digital-Wandler
US6864817B1 (en) * 2003-12-30 2005-03-08 Freescale Semiconductor, Inc. Signaling dependent adaptive analog-to-digital converter (ADC) system and method of using same

Also Published As

Publication number Publication date
DE102006043017A1 (de) 2008-03-27

Similar Documents

Publication Publication Date Title
DE102009000471A1 (de) Messung des effektiven Serienwiderstandes eines Kondensators
DE102011017232A1 (de) Verfahren und Vorrichtung zum Verbessern des dynamischen Breichs eines Touchscreen-Controllers
DE102014222651A1 (de) Digitales Sensorsystem
DE102004013123A1 (de) Verfahren und Vorrichtung zur Korrektur eines Sensorsignals hinsichtlich der Temperatur
DE102014216998B4 (de) Kapazitiver Sensor, die zugehörige Auswerteschaltung und Aktor in einem Kraftfahrzeug
DE102014018497A1 (de) Verfahren zum Erzeugen eines Hupenbetätigungssignals unter Verwendung eines Kraftmessers, der in einem Lenkrad angeordnet ist, und Vorrichtung zur Durchführung dieses Verfahrens
EP2905901B1 (fr) Procédé et dispositif de détermination d'une capacité et/ou d'une modification de capacité d'un élément de construction capacitif
WO2021083736A1 (fr) Procédé de surveillance du fonctionnement d'une cellule de mesure de pression capacitive
EP3042167B1 (fr) Procédé pour le fonctionnement d'un détecteur infrarouge
DE102019126005B4 (de) Taktiler Kraft-Weg-Sensor für eine Ladeklappe in einem Elektrofahrzeug
DE102007001105B4 (de) Kapazitiver Sensor zur Erfassung einer physikalischen Größe
WO2008031683A1 (fr) Circuit comprenant un convertisseur de signal commandable
DE102006029120A1 (de) Schaltungsanordnung zur Erfassung der Kapazität bzw. einer Kapazitätsänderung eines kapazitiven Schaltungs- oder Bauelements
DE102011078694B4 (de) Verfahren zum Betreiben eines piezokeramischen Sensors und Schaltung zur Durchführung des Verfahrens
CH700376A2 (de) Kapazitiver Sensor und Verfahren zur kapazitiven Erfassung eines Objektabstandes.
EP4419926B1 (fr) Dispositif et procédé de détection d'un courant électrique avec fréquence d'échantillonnage optimisée
DE102016014124A1 (de) Verfahren zum Messen eines Kapazitätswertes
DE102020213559B4 (de) Bestimmung einer Information über eine Verbindung einer Schaltungskomponente
DE102013209252A1 (de) Vorrichtung zur Umfeldsensorik mit verbesserter Verstärkungsumschaltung
DE112022006306T5 (de) Elektrostatische eingabevorrichtung
DE102006041226B4 (de) Drucktastschalter
DE1944982A1 (de) Automatischer Messbereichwaehler fuer ein Messgeraet
WO2010043432A1 (fr) Dispositif et procédé de mesure d’une valeur de résistance
DE2155839A1 (de) Frequenz-spannungs-wandler, insbesondere fuer blockier- und schleuderschutzeinrichtungen von fahrzeugen
DE10117384B4 (de) Sensorvorrichtung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07788424

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 07788424

Country of ref document: EP

Kind code of ref document: A1