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Signal generating apparatus and test apparatus

  • US 8,094,053 B2
  • Filed: 12/10/2009
  • Issued: 01/10/2012
  • Est. Priority Date: 12/10/2009
  • Status: Active Grant
First Claim
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1. A signal generating apparatus comprising:

  • a DA converter that outputs an output signal corresponding to input data supplied thereto;

    a comparing section that compares (i) a level of a signal output from an analog circuit that propagates the output signal to output a signal corresponding to the input data to (ii) a level of the signal output by the DA converter; and

    a measuring section that measures a waveform of the signal output by the analog circuit based on a comparison result of the comparing section, whereinthe DA converter outputs a voltage corresponding to data supplied thereto,the signal generating apparatus further comprises a sample/hold section that samples a voltage output by the DA converter and holds the sampled voltage, andthe measuring section (i) provides the DA converter with setting data to cause the DA converter to output a setting voltage corresponding to the setting data, (ii) causes the sample/hold section to sample the setting voltage, (iii) provides the analog circuit with the setting voltage held by the sample/hold section, and (iv) measures a settling waveform of the voltage of the signal output from the analog circuit, from when the setting voltage is provided to when the voltage stabilizes.

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