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D/A converter for a digital signal after non-linear A/D conversion, audio signal processing circuit and liquid crystal display device including the same

  • US 7,369,074 B2
  • Filed: 11/29/2004
  • Issued: 05/06/2008
  • Est. Priority Date: 12/11/2003
  • Status: Expired due to Fees
First Claim
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1. A D/A converter comprising:

  • a first reference voltage;

    a second reference voltage;

    a plurality of resistors connected in series between the first reference voltage and the second reference voltage; and

    a plurality of switching elements;

    wherein the plurality of switching elements are controlled by an input digital data,wherein the plurality of switching elements extract a potential from selected one of connecting portions between the plurality of resistors,wherein the input digital data is a non-linear conversion digital signal,wherein the non-linear conversion digital signal is non-linear with respect to an original analog signal,wherein the potential is a linear conversion analog signal,wherein a resistance value of each of the plurality of resistors is set so that the non-linear conversion digital signal is directly converted to the linear conversion analog signal, andwherein the linear conversion analog signal is linear with respect to the original analog signal.

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