CPC H01J 37/302 (2013.01) [H01J 37/147 (2013.01); H03M 1/0604 (2013.01)] | 20 Claims |
1. A waveform generating device comprising:
a first DA converter converting input data from digital to analog and provide an output;
a controller outputting a first signal having a command value based on the input data, and a second signal having a command value differing by a constant value from the command value of the first signal;
a second DA converter converting the first signal from digital to analog and provide an output;
a third DA converter converting the second signal from digital to analog and provide an output; and
a combiner combining the output of the first DA converter, the output of the second DA converter, and the output of the third DA converter,
wherein when a value of a predetermined first high-order bit of the input data is inverted, the controller changes the command value of the first signal such that a value of the first high-order bit or a second high-order bit different from the first high-order bit is inverted.
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