公开(公告)号：US20250061935A1

公开(公告)日：2025-02-20

申请号：US18796915

申请日：2024-08-07

Applicant: Rambus Inc.

Inventor： Dongyun LEE ,  Mark D. KELLAM ,  Joohee KIM

IPC: G11C11/4076 ,  G11C11/4074 ,  G11C11/419

Abstract: An interposer interconnecting a first integrated circuit and a second integrated circuit includes active circuitry. The “active” interposer converts high-speed signals into lower-speed, but more parallelized, signals for transmission across the active interposer. The parallelized signals may be buffered or amplified at intervals while crossing the active interposer. The high-speed to low-speed, and back, conversions may be performed by an appropriately configured and controlled multiplexer/demultiplexer circuitry The supply voltages for some interposer circuits may be different than the supply voltages for the interfaces with the first and second integrated circuit. One or more of the interconnected integrated circuits may supply, and/or calibrate the supply voltages for the interposer circuitry. Timing signals provided by one or more of the interconnected integrated circuits may also be calibrated using circuitry on the active interposer.

公开(公告)号：US20240370361A1

公开(公告)日：2024-11-07

申请号：US18687116

申请日：2022-08-23

Applicant: Rambus Inc.

Inventor： Joohee KIM ,  Dongyun LEE ,  Steven C. WOO

IPC: G06F12/02

Abstract: Multiple (e.g., four) memory devices on a module are connected to a common pair of differential data strobe signal conductors. The common pair of differential data strobe conductors are also coupled to a memory controller to time the transmission of data to the multiple memory devices and to time the reception of data from the memory devices. The controller calibrates two or more different data transmission delays relative to its transmission of a write data strobe signal on the common pair of differential data strobe conductors. The controller also calibrates to account for two or more different data reception delays (skew) relative to its reception of a read data strobe signal on the common pair of differential data strobe conductors.