Invention Grant
US09481166B2 Piezoelectric element drive circuit and state detection method, and image recording device 有权
压电元件驱动电路和状态检测方法,以及图像记录装置

Piezoelectric element drive circuit and state detection method, and image recording device
Abstract:
Provided are a piezoelectric element drive circuit and state detection method, and an image recording device which realize state detection of a piezoelectric element inexpensively and with a suppressed circuit scale in a drive circuit for rapidly driving a large-capacity load that uses negative voltage drive. An output potential (VOUT) of a boost unit (BST) is detected in a state in which VS_AMP supplied to an amplification unit (AMP) is set to a voltage lower than a maximum rating of a transistor (FET1) by SW1, supply of VS_FET to the boost unit (BST) is blocked by SW2, and an individual electrode (28) of a piezoactuator (30) is pulled down to VS_FET via a resistor (R6).
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