Liquid jet and printing apparatus for preventing the change of voltage in the drive signal
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United States of America Patent
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Jan 24, 2012
Issued Date -
Apr 15, 2010
app pub date -
Dec 14, 2009
filing date -
Dec 14, 2009
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A liquid jet apparatus according to the present invention includes a plurality of nozzles, an actuator provided for each nozzle and connected to the respective nozzle, and a drive unit for applying a drive signal to the actuator. The drive unit includes a drive waveform generator that generates a drive waveform signal for controlling the drive of the actuator, a modulator for performing a pulse modulation of the drive waveform signal to produce a modulated signal, a digital power amplifier for power amplifying the modulated signal to produce an amplified signal, a low-pass filter for smoothing the amplified signal and supplying the drive signal to the actuator, and a modulation signal correcting unit that corrects the modulated signal according to a power supply voltage of the digital power amplifier.
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