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US 8,894,170 B2Granted
Fluid ejection device and fluid ejection printer with a power amplifier stopping section
AssigneeSeiko Epson Corporation
InventorsKunio Tabata, Atsushi Oshima, Noritaka Ide, Shinichi Miyazaki, Hiroyuki Yoshino
Life of this patent
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Abstract
A fluid ejection device includes: a modulator adapted to pulse-modulate a drive waveform signal forming a basis of a drive signal of an actuator to obtain a modulated signal; a digital power amplifier circuit adapted to power-amplify the modulated signal to obtain a power-amplified modulated signal; a low pass filter adapted to smooth the power-amplified modulated signal to obtain the drive signal; and a power amplification stopping section operating when holding a voltage of the actuator constant.
Claims16
A fluid ejection device comprising:
- a modulator that modulates a drive waveform signal and outputs a modulated signal;
- a digital power amplifier that amplifies the modulated signal and outputs an amplified signal;
- a low pass filter that filters the amplified signal and outputs a drive signal;
- and
- a stopping section that stops an operation of the digital power amplifier when the drive waveform signal is constant.
2 more elements
Dependencies are inferred from the claim text.