公开(公告)号：US20220028448A1

公开(公告)日：2022-01-27

申请号：US16940194

申请日：2020-07-27

Applicant: MICRON TECHNOLOGY, INC.

Inventor： M. Ataul Karim ,  Timothy M. Hollis

IPC: G11C11/4093 ,  G11C11/56 ,  H04L27/08

Abstract: Apparatuses, systems, and methods for high-pass filtering pre-emphasis circuits. A device may use a pre-emphasis driver to provide a multi-level signal based on multiple binary signals. The pre-emphasis driver includes a primary driver coupled in parallel with at least one equalizer path, each of which includes an equalizer driver and a filtering element. The filtering element may be an AC filtering element, such as a capacitor. The equalizer paths may contribute equalized signal(s) which have a high-pass filtering behavior. The pre-emphasis circuit may combine the primary signal from the primary driver and the equalized signals to generate an overall output multi-level signal. In some embodiments, the pre-emphasis driver may be a pulse amplitude modulated (PAM) driver, such as a PAM4 driver with four levels of the multi-level driver.