Invention Grant
US09399341B2 Liquid ejecting apparatus, head unit, integrated circuit device for driving capacitive load, and capacitive load driving circuit 有权
液体喷射装置,头单元,用于驱动电容性负载的集成电路装置和容性负载驱动电路

Liquid ejecting apparatus, head unit, integrated circuit device for driving capacitive load, and capacitive load driving circuit
Abstract:
A liquid ejecting apparatus according to the invention includes: a modulation unit that generates a modulated signal which is obtained by pulse-modulating an original signal; a transistor that generates an amplified and modulated signal which is obtained by amplifying the modulated signal; a switching circuit; a low pass filter that generates a drive signal by demodulating the amplified and modulated signal; a feedback circuit that generates a feedback signal and feeds back the feedback signal to the modulation unit; a feedback terminal that electrically connects the modulation unit to the feedback circuit; a piezoelectric element that is displaced by the drive signal; a cavity; and a nozzle, in which a distance between the feedback terminal and a closest point to the feedback terminal in the modulation unit is shorter than a distance between the feedback terminal and a closest point to the feedback terminal in the switching circuit.
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