Patent ID: 11878518
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A liquid discharging apparatus comprising:
a drive signal output circuit outputting a drive signal that displaces between a first potential and a second potential that is lower than the first potential; and
a discharging portion including a piezoelectric element that is driven based on the drive signal and discharging liquid by a drive of the piezoelectric element, wherein
the drive signal output circuit includes
a modulation circuit that outputs a modulation signal obtained by modulating a base drive signal that is a base of the drive signal,
an amplification circuit that outputs an amplified modulation signal obtained by amplifying the modulation signal, and
a demodulation circuit that includes a first capacitor, a second capacitor, and an inductor and outputs the drive signal obtained by demodulating the amplified modulation signal,

the first potential is 25 V or higher,
one end of the first capacitor and one end of the second capacitor are coupled to one end of the inductor,
the first capacitor and the second capacitor are coupled to each other in parallel,
the first capacitor includes a first laminated portion in which a resin thin film layer and a first metal thin film layer are laminated,
the second capacitor includes a second laminated portion in which a ceramic thin film layer and a second metal thin film layer are laminated, and
an electrostatic capacitance of the first capacitor is larger than an electrostatic capacitance of the second capacitor.