Hewlett-packard Development Company, L.P.

Avago Technologies International Sales Pte. Limited

Steven Affleck

Reid James Riedlinger

Jerome Beckmann

Brandon Yelton

A computer memory system, delay calibration circuit, and method of operating a delay calibration circuit are provided. The disclosed method includes providing a delay-line ring oscillator on silicon of a chip, providing at least one counter on the silicon of the chip, and measuring a chip-specific delay for performing an operation with the chip by synchronizing the at least one counter and operation of the delay-line ring oscillator with a timing trigger.

Automatic delay-line calibration using a replica array

In a preferred embodiment, the invention provides a circuit and method for improving the soft error rate in a dual-port read SRAM cell. A write-only transfer device is connected to a cross-coupled latch, a first wordline, and a first bitline. A first read-only transfer device is connected to a second bitline, a second wordline, and a first pull-down device. A second read-only transfer device is connected to the first bitline, the first wordline, and a second pull-down device. A clear memory transfer device is connected to the cross-coupled latch, a third bitline, and a third pull-down device. This configuration allows a reduction in the size of a dual-port SRAM cell with little or no reduction in the read access time of the cell. The reduction in size also reduces SER by reducing the cross-sectional, p/n junction area exposed to radiation.

Growing community of inventors

Fort Collins, CO, United States of America

Steven Affleck