Method and apparatus for independent rise and fall waveform shaping

摘要

Embodiments are directed to apparatuses and methods of waveform equalization. More specifically, various embodiments provide independent rise and fall waveform shaping equalization. There are other embodiments as well.

主权项

1. An apparatus comprising:
a main driver configured to generate a main driver current from an input signal; a first adjustable delay block configured to generate a first delay signal from the input signal; a rising-edge equalization driver configured to generate from the delay signal and the input signal, a first corresponding current pulse reflecting a rising edge transition in the input signal; a second adjustable delay block configured to generate a second delay signal from the input signal; a falling-edge equalization driver configured to generate from the delay signal and the input signal, a second corresponding current pulse reflecting a falling edge transition in the input signal; and a final driver configured to combine the main driver current with the first corresponding current pulse and the second corresponding current pulse to generate an output having a waveform adjusted for the rising edge transition or the falling edge transition, wherein: the rising-edge equalization driver is configured to generate a positive current pulse when there is a rising edge in the input signal; the falling-edge equalization driver is configured to generate positive current pulse when there is a falling edge in the input signal; and the apparatus further comprises, a second rising-edge equalization driver configured to generate a negative current pulse when there is a rising edge in the input signal; a second falling-edge equalization driver configured to generate negative current pulse when there is a falling edge in the input signal.