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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-
Jan 31, 2017
Grant Date -
Aug 4, 2016
app pub date -
Jan 19, 2016
filing date -
Feb 3, 2015
priority date (Note) -
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status (Latency 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; a switching element that generates an amplification modulation signal obtained by amplifying the modulation signal; a low-pass filter that generates a driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; a selection portion that is configured to include a transistor and selects whether or not the driving signal is applied to the piezoelectric element; and a detection portion that detects lowering of a power source voltage supplied to the selection portion. The detection portion performs control for lowering a voltage of the driving signal if lowering of the power source voltage is detected.
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