Liquid discharging apparatus, head unit, capacitive load driving circuit, and integrated circuit device for capacitive load driving

摘要

There is provided a liquid discharging apparatus including: a modulation portion which generates a modulation signal pulse-modulated from a source signal; a ground terminal which electrically connects the modulation portion to a ground potential; a transistor which generates an amplification modulation signal amplified from the modulation signal; a low pass filter which demodulates the amplification modulation signal and generates a driving signal; a feedback circuit which generates a feedback signal based on the driving signal, and sends back the feedback signal to the modulation portion via a feedback terminal; and a piezoelectric element which is displaced as the driving signal is applied, in which the modulation portion, the ground terminal, and the feedback terminal are formed on the same semiconductor substrate, and in which, in a plan view, the ground terminal and the feedback terminal are disposed being adjacent to each other.

主权项

1. A capacitive load driving circuit comprising:
a modulation portion which generates a modulation signal pulse-modulated from a source signal; a ground terminal which electrically connects the modulation portion to a ground potential; a transistor which generates an amplification modulation signal amplified from the modulation signal; a low pass filter which demodulates the amplification modulation signal, generates a driving signal, and outputs the driving signal to a capacitive load; a feedback circuit which generates a feedback signal based on the driving signal, and sends back the feedback signal to the modulation portion; and a feedback terminal which electrically connects the modulation portion and the feedback circuit to each other, wherein: the modulation portion, the ground terminal, and the feedback terminal are formed on the same semiconductor substrate, the semiconductor substrate includes a power source terminal that electrically connects the modulation portion to a power source potential, and in a plan view, the ground terminal is disposed directly adjacent to the feedback terminal and the power source terminal is disposed directly adjacent to the ground terminal or the feedback terminal.