A driving circuit for driving a capacitive load 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, and a coil that smooths the amplification modulation signal to generate a drive signal.

A liquid ejecting head includes a flow channel forming substrate that is provided with a space constituting a pressure generating chamber which communicates with nozzle openings, a vibration plate that is stacked on one surface of the flow channel forming substrate and seals the space, and a piezoelectric element that includes a first electrode, a piezoelectric layer, and a second electrode sequentially stacked on a surface of the vibration plate opposite to the flow channel forming substrate, in which the first electrode is formed, in which at least a width of a first direction along the opposite surface is narrower than the space in a region corresponding to the space, the piezoelectric layer is stacked so as to overlap the first electrode and at least a part of the vibration plate in the region corresponding to the space, the second electrode is stacked so as to overlap the piezoelectric layer in the region corresponding to the space, and as a thickness of a stacked direction of the piezoelectric element is a thickness of the piezoelectric layer, a first thickness (D1) of the piezoelectric layer of a part positioned on the first electrode and a second thickness (D2) of the piezoelectric layer of a part positioned on the vibration plate satisfy a relationship of the first thickness (D1)>the second thickness (D2).

A liquid discharging head includes a discharge port, an electric wiring substrate, a first resin, a support member, and an element substrate having first and second surfaces, an energy generating element, and a terminal. The discharge port is provided on the first surface, and the terminal is provided on the second surface. When viewed from a direction perpendicular to the second surface, the element substrate includes a first region in which the discharge port is provided and a second region provided along one side of the element substrate and having a thickness thinner than that of the first region. The terminal is provided in the second region. The first resin covers a connection portion between the terminal and an electric wiring substrate. A second resin is disposed to be in contact with the first resin and the support member in a region overlapping the second region.