Patent ID: 6733099
Filing Date: 2004-05-11
Classification: B41J

Abstract:
A waveform generating circuit, comprising:at least one D/A converter that converts a digital signal into an analog voltage and outputs the analog voltage; a waveform generating portion into which an output voltage of the D/A converter is input, and which generates at least one of a voltage rising waveform and a voltage falling waveform in response to a value of that output voltage; and a switching means, whose input can be switched between the output voltage of the D/A converter and a predetermined voltage that is held constant, and which outputs one of those two output voltages to the waveform generating portion; wherein the switching means is configured such that when the digital signal for generating a voltage rising waveform or a voltage falling waveform with the waveform generating portion is input into the D/A converter, the input into the switching means is switched from the predetermined voltage to the output voltage of the D/A converter.