Patent ID: 6229396
Filing Date: 2001-05-08
Classification: H03F,H04L

Abstract:
A line driver circuit for connection to a transformer having a center tapped primary coil, comprising:a first buffer with a controlled or synthesized output impedance having a first and second input and an output providing a first driver signal buffered from the first input for connection to a first end terminal of the center tapped primary coil;a second buffer with a controlled or synthesized output impedance having a first and second input and an output providing a second driver signal buffered from the first input for connection to a second end terminal of the center tapped primary coil;wherein the first driver signal induces a first flyback voltage effect in the second buffer through the transformer and wherein the second driver signal induces a second flyback voltage effect in the first buffer through the transformer;a first pre-driver having an input for receiving a driver input voltage signal, a first output for providing the first driver signal to the first input of the first buffer and a second output for providing a first compensation signal to the second input of the second buffer to compensate for the first flyback voltage effect induced by the first driver signal; anda second pre-driver having an input for receiving the driver input voltage signal, a first output for providing the second driver signal to the first input of the second buffer and a second output for providing a second compensation signal to the second input of the first buffer to compensate for the second flyback voltage effect induced by the second driver signal.