Signal generating apparatus and test apparatus
First Claim
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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Accused Products
Abstract
Provided is a signal generating apparatus comprising a DA converter that outputs an output signal corresponding to input data supplied thereto; a sample/hold unit that is provided between the DA converter and an output end of the signal generating apparatus, and that samples an output voltage of the DA converter and holds the sampled output voltage; 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 control section that, during a holding period, (iii) provides the DA converter with comparison data instead of the input data to cause the DA converter to output a comparison voltage corresponding to the comparison data, (iv) causes the comparing section to compare a voltage of the signal output by the analog circuit to the comparison voltage, and (v) adjusts the output voltage of the DA converter based on a comparison result of the comparing section.
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Citations
20 Claims
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1. A signal generating apparatus comprising:
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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, wherein the 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, and the 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A test apparatus that tests a device under test, comprising:
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a signal generating apparatus that generates a voltage provided to the device under test; and a drive section that supplies the device under test with the voltage generated by the signal generating apparatus, wherein the signal generating apparatus comprises; 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. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A signal generating apparatus comprising:
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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.
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Specification