Liquid discharging apparatus, head unit, capacitive load driving circuit, and control method of capacitive load driving circuit
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United States of America Patent
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Oct 25, 2016
Grant Date -
Aug 18, 2016
app pub date -
Jan 20, 2016
filing date -
Jan 20, 2016
priority date (Note) -
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Abstract
A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; an amplifier that includes a first gate driver generating a first amplification control signal based on the modulation signal, a second gate driver generating a second amplification control signal based on the modulation signal, a first transistor operating based on the first amplification control signal, a second transistor connected to the first transistor on a low-potential side in series and operating based on the second amplification control signal; an operation control portion that controls operations of the first gate driver and the second gate driver; a low-pass filter that generates a driving signal by demodulating an amplification modulation signal generated based on operations of the first transistor and the second transistor; and a piezoelectric element that is displaced by applying the driving signal.
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