Liquid discharging apparatus, head unit, and control method of liquid discharging apparatus
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United States of America Patent
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Oct 13, 2015
Grant Date -
Sep 3, 2015
app pub date -
Feb 19, 2015
filing date -
Mar 3, 2014
priority date (Note) -
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Abstract
Provided is a liquid discharging apparatus which includes a modulation circuit which generates a modulation signal which is obtained by pulse-modulating a source signal, a transistor which generates an amplified modulation signal by amplifying the modulation signal, a low pass filter which generates a drive signal by smoothening the amplified modulation signal, a piezoelectric element which is displaced by receiving the drive signal, and a multilayer circuit substrate on which the modulation circuit, the transistor, and the low pass filter are mounted. Furthermore, the multilayer circuit substrate has a multilayer configuration constituted of three or more layers which include at least one layer other than two surface layers. In addition, a feedback wiring pattern through which the modulation signal, the amplified modulation signal, or the drive signal is fed back to the modulation circuit is provided in the one layer.
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