DRIVE CIRCUIT FOR PIEZOELECTRIC ELEMENT, STATE DETECTION METHOD AND IMAGE RECORDING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a drive circuit for driving a large-capacity load of a negative voltage drive at a high speed which enables detection of a state of a piezoelectric element at low costs while suppressing enlargement of the scale of the circuit, a state detection method and an image formation apparatus.SOLUTION: Vsupplied to an amplification AMP by SW1 is a voltage smaller than the maximum rating of the transistor FET1; the supply of the Vto a boost part BST by SW2 is cut-off; and the output potential Vof the boost part BST is detected in a state where an individual electrode 28 of a piezoelectric actuator 30 is pulled down through a resistance R6 to the V.