| 摘要 |
A driver circuit of an image display apparatus comprises driver circuit with a class A/B push-pull stage (T 3 , T 5 ). The driver circuit contains an n-type pull transistor (T 3 ), an n-type control transistor (T 2 ) with a main current channel terminal coupled to a control electrode of the pull transistor (T 2 ) and a voltage source (V) applying a predetermined voltage over a series connection of the control electrode-main current channel terminals of the control transistor (T 2 ) and the pull transistor (T 3 ). The current from the control transistor (T 2 ) flows to a p-type push transistor (T 5 ) via a current mirror (T 4 , T 5 ). An input transistor (T 1 ) draws all of the current from the control transistor (T 2 ) via a node ( 142 ) between the control transistor (T 2 ) and the pull transistor (T 3 ) to control the ratio between the currents through these transistors (T 2 , T 3 ). The input of the driver circuit has a direct control over the current through the input transistor (T 1 ) that does not include a feedback through the control transistor (T 2 ). |
