Patent ID: 8487663
Filing Date: 2013-07-16
Classification: H03K

Abstract:
1. A driver circuit suitable for outputting a signal onto a line affected by conducted EMI, the driver circuit comprising: a slope control circuit receiving an input signal and outputting a slope controlled version of the input signal; an operational amplifier, having two inputs and an output, the output of the slope control circuit being connected to a first one of said inputs of the operational amplifier; and an output transistor, receiving at its input the output of the operational amplifier-whereby the output transistor is arranged to output the slope controlled version to the line; whereby the second input of the operational amplifier is connected over a feedback path with the output of the output transistor whereby the output signal of the slope control circuit and the output of the operational amplifier are signals having a rising edge and a falling edge, both edges being slope controlled and whereby the feedback path contains a clipping circuit for reducing an amount of the conducted EMI in the feedback to the amplifier.