Transistor Driver Inner Feedback Loop
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
A previous article [*] describes a transistor bridge driver with balance control for driving an inductive load. In the present article, an additional inner feedback loop with low gain and high bandwidth is additionally employed to reduce transient crossover distortion in the load current. The earlier article describes a linear transistor bridge driver circuit with a second feedback path to ensure that the bridge transistors turn on equally despite component variations. A first feedback path senses the voltage across resistors in opposite arms of the bridge to provide current feedback to the input. The second feedback path uses voltage feedback from the load to ensure that the driving pair of transistors turn on equally.