Invention Grant
US08109587B2 Capacitive load driving circuit and liquid droplet jetting apparatus 有权
电容负载驱动电路和液滴喷射装置

Capacitive load driving circuit and liquid droplet jetting apparatus
Abstract:
A capacitive load driving circuit including: a filter including an inductor to which an analog driving signal is input, and a capacitor with a fixed capacitance where one electrode is connected the inductor and other electrode grounded; a plurality of capacitive loads connected in parallel to the capacitor, and driven in accordance with the analog driving signal; a conversion section converting a load voltage to a digital signal; a signal processing section generating a predetermined signal for driving the capacitive load, deriving a signal that represents a magnitude of an electric current flowing to the capacitive load from the digital signal and a digital driving signal, subtracting the signal from the predetermined signal, and outputting the subtracted signal as the digital driving signal; and a switching section generating the analog driving signal by performing switching based on the digital driving signal, and outputting the analog driving signal.
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