Patent ID: 8717071
Filing Date: 2014-05-06
Classification: B41J,H03K

Abstract:
1. A capacitive load drive circuit comprising: a stepped voltage drive circuit configured to cyclically charge a capacitive load to a selected high voltage during a high current ramp up and configured to discharge the capacitive load to a selected low voltage during a high current ramp down, comprising: a voltage supply circuit configured to supply to the capacitive load a variable voltage through sequentially electrically connected rails, with the rail voltage of the sequentially next rail higher than the rail voltage of the sequentially preceding rail, during the high current ramp up, the rails being configured to each be electrically connected to the capacitive load in reverse order during the high current ramp down; and a low current linear drive amplifier configured to be connected to the capacitive load during a low current ramp up, intermediate the high current ramp up and high current ramp down.