Liquid ejecting apparatus and head unit
AssigneeSeiko Epson Corporation
InventorsToru KASHIMURA, Hiroshi SUGITA
Life of this patent
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Abstract
A liquid ejecting apparatus includes a signal modulation section that causes an original drive signal to be pulse-modulated to generate a modulation signal, a signal amplification section that amplifies the modulation signal to generate an amplification modulation signal, a coil that smooths the amplification modulation signal to generate a drive signal, a piezoelectric element that deforms when the drive signal is applied thereto, a cavity that expands or contracts due to a deformation of the piezoelectric element, and a nozzle that communicates with the cavity and ejects a liquid in accordance with an increase/decrease of a pressure inside the cavity. A core material of the coil is made of a Mn—Zn-based ferrite.
Claims5
A driving circuit for driving a capacitive load comprising:
- a signal modulation section that causes an original drive signal to be pulse-modulated to generate a modulation signal;
- a signal amplification section that amplifies the modulation signal to generate an amplification modulation signal;
- a coil that smooths the amplification modulation signal to generate a drive signal;
- a capacitive load that drives by the drive signal, wherein
- a core material of the coil is made of a Mn—Zn-based ferrite, and
- a resistance component including a core material loss and a wire material loss is lower than 200 mΩ in the coil during a 4 MHz-operation.
Dependencies are inferred from the claim text.