Patent ID: 6876231
Filing Date: 2005-04-05
Classification: H03K

Abstract:
1. A driver circuit comprising: first and second diode bridges, wherein when switching an output voltage at an output terminal from a low level to a high level, a first transition current is let flow from a high voltage source to stray capacitance via a diode included in the first diode bridge, and a first balance current is let flow from the high voltage source to a low voltage source via a diode located so as to be opposed to the diode of the first diode bridge, and when switching the output voltage from the high level to the low level, a second transition current is let flow from the stray capacitance to the low voltage source via a diode included in the second diode bridge, and a second balance current is let flow from the high voltage source to the low voltage source via a diode located so as to be opposed to the diode of the second diode bridge, and the driver circuit comprises: a first current mirror circuit for letting flow the first transition current obtained by adding a product of a value of the first balance current and a predetermined multiplier to a first stationary current value, from the high voltage source to the first diode bridge; and a second current mirror circuit for letting flow the second transition current obtained by adding a product of a value of the second balance current and a predetermined multiplier to a second stationary current value, from the second diode bridge to the low voltage source.