LIQUID EJECTING APPARATUS

摘要

A liquid ejecting apparatus which includes a modulation circuit which generates a modulated signal; a transistor which generates an amplified-modulated signal; a low pass filter which generates a driving signal; a thermistor; a control section which controls printing; and a multilayered circuit board on which the modulation circuit, the transistor, and the low pass filter are mounted, in which the modulation circuit generates the modulated signal by feeding back a signal based on any one of the modulated signal, the amplified-modulated signal, and the driving signal, the multilayered circuit board has a multilayer structure of three layers or more, a feedback wiring pattern which feeds back any one of the modulated signal, the amplified-modulated signal, and the driving signal to the modulation circuit, and a temperature wiring pattern which electrically connects the thermistor and the control section does not intersect the feedback wiring pattern when viewed planarly.

主权项

1. A liquid ejecting apparatus comprising:
a modulation circuit which generates a modulated signal obtained by performing pulse modulation with respect to a source signal; a transistor which generates an amplified-modulated signal by amplifying the modulated signal; a low pass filter which generates a driving signal by planarizing the amplified-modulated signal; a piezoelectric element which is displaced when being applied with the driving signal; a cavity of which an internal volume varies due to displacement of the piezoelectric element; a nozzle which is provided in order to cause liquid in the cavity to be ejected according to a change in the internal volume of the cavity; a thermistor which is provided in order to detect a temperature of the transistor; a control section which controls printing according to the temperature which is detected by the thermistor; and a multilayered circuit board on which the modulation circuit, the transistor, and the low pass filter are mounted, wherein the modulation circuit generates the modulated signal by feeding back a signal based on any one of the modulated signal, the amplified-modulated signal, and the driving signal, wherein the multilayered circuit board has a multilayer structure of three layers or more including at least one layer other than two surface layers, wherein a feedback wiring pattern which feeds back any one of the modulated signal, the amplified-modulated signal, and the driving signal to the modulation circuit is provided on the one layer, and wherein a temperature wiring pattern which electrically connects the thermistor and the control section does not intersect the feedback wiring pattern when viewed planarly.