Liquid discharge apparatus, head unit, capacitive load drive circuit, and integrated circuit device for capacitive load drive
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United States of America Patent
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Jan 9, 2018
Issued Date -
N/A
app pub date -
Dec 13, 2016
filing date -
Jan 28, 2015
priority date (Note) -
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Abstract
A driving circuit for driving a capacitive load includes an integrated circuit device that includes a modulation portion which generates a modulation signal by pulse-modulating a source signal; a feedback circuit; a transistor that generates an amplified modulation signal which is obtained by amplifying the modulation signal; a low-pass filter that generates a drive signal by demodulating the amplified modulation signal; and a piezoelectric element that is displaced by applying the drive signal, wherein the feedback circuit generates a feedback signal on the basis of the drive signal, and feeds back the feedback signal to the modulation portion through a feedback terminal, the modulation portion includes a first circuit block and a second circuit block, and the integrated circuit device is configured to separate the first circuit block from the second circuit block by a triple-well structure.
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