Two-wire Interface for Digital Microphones

Wouter Groothedde (Inventor), Eric A.M. Klumperink (Inventor), Bram Nauta (Inventor), Rudolphe Gustave Hubertus Eschauzier (Inventor), Nico van Rijn (Inventor)

Research output: PatentProfessional

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Abstract

A two-wire interface for a digital microphone circuit includes a power line and a ground line. The interface utilizes the ground line as a "voltage active line" to transmit both clock and data signals between the digital microphone circuit and a receiving circuit. The digital microphone circuit detects the clock signal on the voltage active line and uses the detected clock signal to operate an ADC to provide digital data. The digital data is used to selectively drive current back to the receiving circuit over the voltage active line. The receiving circuit detects the transmitted data by monitoring the voltage associated with a line termination. The impedance associated with the line termination is switched by the receiver circuit to modulate the clock signal on the voltage active line.
Original languageUndefined
Patent numberUS20030465514
Priority date18/06/03
Publication statusPublished - 18 Jun 2003

Keywords

  • EWI-14452
  • METIS-224247
  • IR-68230

Cite this

Groothedde, W., Klumperink, E. A. M., Nauta, B., Eschauzier, R. G. H., & van Rijn, N. (2003). Two-wire Interface for Digital Microphones. (Patent No. US20030465514).
Groothedde, Wouter (Inventor) ; Klumperink, Eric A.M. (Inventor) ; Nauta, Bram (Inventor) ; Eschauzier, Rudolphe Gustave Hubertus (Inventor) ; van Rijn, Nico (Inventor). / Two-wire Interface for Digital Microphones. Patent No.: US20030465514.
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title = "Two-wire Interface for Digital Microphones",
abstract = "A two-wire interface for a digital microphone circuit includes a power line and a ground line. The interface utilizes the ground line as a {"}voltage active line{"} to transmit both clock and data signals between the digital microphone circuit and a receiving circuit. The digital microphone circuit detects the clock signal on the voltage active line and uses the detected clock signal to operate an ADC to provide digital data. The digital data is used to selectively drive current back to the receiving circuit over the voltage active line. The receiving circuit detects the transmitted data by monitoring the voltage associated with a line termination. The impedance associated with the line termination is switched by the receiver circuit to modulate the clock signal on the voltage active line.",
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Groothedde, W, Klumperink, EAM, Nauta, B, Eschauzier, RGH & van Rijn, N 2003, Two-wire Interface for Digital Microphones, Patent No. US20030465514.

Two-wire Interface for Digital Microphones. / Groothedde, Wouter (Inventor); Klumperink, Eric A.M. (Inventor); Nauta, Bram (Inventor); Eschauzier, Rudolphe Gustave Hubertus (Inventor); van Rijn, Nico (Inventor).

Patent No.: US20030465514.

Research output: PatentProfessional

TY - PAT

T1 - Two-wire Interface for Digital Microphones

AU - Groothedde, Wouter

AU - Klumperink, Eric A.M.

AU - Nauta, Bram

AU - Eschauzier, Rudolphe Gustave Hubertus

AU - van Rijn, Nico

PY - 2003/6/18

Y1 - 2003/6/18

N2 - A two-wire interface for a digital microphone circuit includes a power line and a ground line. The interface utilizes the ground line as a "voltage active line" to transmit both clock and data signals between the digital microphone circuit and a receiving circuit. The digital microphone circuit detects the clock signal on the voltage active line and uses the detected clock signal to operate an ADC to provide digital data. The digital data is used to selectively drive current back to the receiving circuit over the voltage active line. The receiving circuit detects the transmitted data by monitoring the voltage associated with a line termination. The impedance associated with the line termination is switched by the receiver circuit to modulate the clock signal on the voltage active line.

AB - A two-wire interface for a digital microphone circuit includes a power line and a ground line. The interface utilizes the ground line as a "voltage active line" to transmit both clock and data signals between the digital microphone circuit and a receiving circuit. The digital microphone circuit detects the clock signal on the voltage active line and uses the detected clock signal to operate an ADC to provide digital data. The digital data is used to selectively drive current back to the receiving circuit over the voltage active line. The receiving circuit detects the transmitted data by monitoring the voltage associated with a line termination. The impedance associated with the line termination is switched by the receiver circuit to modulate the clock signal on the voltage active line.

KW - EWI-14452

KW - METIS-224247

KW - IR-68230

M3 - Patent

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Groothedde W, Klumperink EAM, Nauta B, Eschauzier RGH, van Rijn N, inventors. Two-wire Interface for Digital Microphones. US20030465514. 2003 Jun 18.