发明名称 |
Capacitive load driving circuit, ink jet printer, and fluid ejecting apparatus |
摘要 |
<p>A capacitive load driving circuit includes: a drive waveform signal generator that generates a drive waveform signal; a subtractor that outputs a differential signal between the drive waveform signal and a feedback signal; a modulator that pulse-modulates the differential signal and outputs a modulated signal; a digital power amplifier that amplifies the power of the modulated signal and outputs a power-amplified modulated signal; a smoothing filter that is constructed by connecting an inductor and a capacitive load with a wire, smoothes the power-amplified modulated signal, and outputs a drive signal of the capacitive load; a compensator that causes a phase to precede the drive signal; and an attenuator that attenuates signal amplitude in a band at least including a modulation frequency of the modulated signal, wherein a signal output from a connecting point between the inductor and the wire is made to pass through the compensator and the attenuator and is then used as a feedback signal to the subtractor.</p> |
申请公布号 |
EP2371544(B1) |
申请公布日期 |
2015.09.02 |
申请号 |
EP20110159971 |
申请日期 |
2011.03.28 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
YOSHINO, HIROYUKI;OSHIMA, ATSUSHI;TABATA, KUNIO;MIYAZAKI, SHINICHI;IDE, NORITAKA |
分类号 |
B41J2/045 |
主分类号 |
B41J2/045 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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