公开(公告)号：US11563427B2

公开(公告)日：2023-01-24

申请号：US17351421

申请日：2021-06-18

Applicant: Micron Technology, Inc.

Inventor： Maksim Kuzmenka ,  Elena Cabrera Bernal

IPC: H03K5/13 ,  G11C11/22 ,  G11C11/4076 ,  H03G3/30 ,  H03F3/45 ,  H03K5/00

Abstract: Methods, systems, and devices for delay adjustment circuits are described. Amplifiers (e.g., differential amplifiers) may act like variable capacitors (e.g., due to the Miller-effect) to control delays of signals between buffer (e.g., re-driver) stages. The gains of the amplifiers may be adjusted by adjusting the currents through the amplifiers, which may change the apparent capacitances seen by the signal line (due to the Miller-effect). The capacitance of each amplifier may be the intrinsic capacitance of input transistors that make up the amplifier, or may be a discrete capacitor. In some examples, two differential stages may be inserted on a four-phase clocking system (e.g., one on 0 and 180 phases, the other on 90 and 270 phases), and may be controlled differentially to control phase-to-phase delay.