LIQUID DISCHARGING APPARATUS, HEAD UNIT, CAPACITIVE LOAD DRIVING CIRCUIT, AND INTEGRATED CIRCUIT DEVICE FOR CAPACITIVE LOAD DRIVING

摘要

There is provided a driving circuit for a capacitive load including: a modulation portion which generates a modulation signal pulse-modulated from a source signal; a gate driver which generates an amplification control signal based on the modulation signal; a boosting circuit which boosts and supplies a voltage to the gate driver; a transistor which generates an amplification modulation signal amplified from the modulation signal based on the amplification control signal; a low pass filter which demodulates the amplification modulation signal and generates a driving signal; and in which a wiring impedance between the ground terminal and the gate driver is smaller than a wiring impedance between the ground terminal and the boosting circuit.

主权项

1. A driving circuit for driving a capacitive load, comprising:
a modulator which generates a modulation signal pulse-modulated from a source signal; a gate driver which generates an amplification control signal based on the modulation signal; a boosting circuit which boosts and supplies a voltage to the gate driver; a transistor which generates an amplification modulation signal amplified from the modulation signal based on the amplification control signal; and a low pass filter which demodulates the amplification modulation signal, generates a driving signal, and outputs the driving signal to the capacitive load, wherein the gate driver and the boosting circuit are electrically connected to a common ground terminal, and wherein a wiring impedance between the ground terminal and the gate driver is smaller than a wiring impedance between the ground terminal and the boosting circuit.