Drive apparatus
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United States of America Patent
Stats
-
Jan 18, 2005
Grant Date -
May 8, 2003
app pub date -
Oct 31, 2002
filing date -
Nov 7, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to provide a drive apparatus where a rush-current is small when a voltage is applied to a capacitive load so that the drive apparatus is driven, the drive apparatus has a capacitive load 22, first drive circuits Q1, Q4 for applying a power source voltage E to the capacitive load 22, second drive circuits Q2, Q3 for applying the power source voltage E to the capacitive load 22 to an opposite direction to the first drive circuits Q1 and Q4, and a control circuit 32 for operating the first and second drive circuits Q1, Q4; Q2, Q3 alternately. Discharging circuits Q5, G1, G2, Q6 which are connected with inductive element G1 and G2 are provided to both ends of the capacitive load 22. The control circuit 32 operates the first and second drive circuits Q1, Q4; Q2, Q3 with an interval, and operates the discharging circuits Q5, G1, G2, Q6 during the interval.
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