Avago Technologies General IP/Broadcom Assigned Five Patents

Devices for spin torque oscillator control and monitoring
Avago Technologies General IP/Broadcom Ltd., (Singapore), PTE. Ltd., Singapore, has been assigned a patent (9,881,637) developed by Wilson, Ross, Menlo Park, CA, Krebs, Andrew, Eagan, MN, Bhaumik, Jaydip, , Greg, Longmont, CO, and O’Brien, Scott, Mendota Heights, MS, for a “methods and devices for spin torque oscillator control and monitoring.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “An apparatus for microwave-assisted magnetic recording includes a magnetic write head operable to write data to a magnetic storage medium. The apparatus includes a spin-torque microwave oscillator coupled to the magnetic write head and operable to provide microwave radiation to the magnetic storage medium. The apparatus includes a driver circuit in communication with the magnetic write head. The driver circuit is operable to dynamically modulate bias current provided to the spin-torque microwave oscillator in sympathy with data being written to the magnetic storage medium by the magnetic write head.”

The patent application was filed on February 17, 2017 (15/435,527).

Reading magnetic media
Avago Technologies General IP, (Singapore), PTE. Ltd., Singapore, has been assigned a patent (9,875,770) developed by Singleton, Jefferson Elliott, Longmont, CO, Mathew, George, San Jose, CA, Worrell, Kurt J., Berthoud, CO, and Dziak, Scott, Fort Collins, CO, for a “devices and methods for reading magnetic media.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “An apparatus for reading data from a magnetic storage medium includes a plurality of magnetic read heads each configured to read a track of the magnetic storage medium and generate an analog data signal corresponding to the read track. The apparatus includes a converter to generate digital data samples from the analog data signals, and a plurality of equalizers to apply a plurality of coefficients to the digital data samples to generate a plurality of equalized signals. The plurality of coefficients are associated with different locations within the track. The apparatus includes a plurality of detectors to compute metrics and detect data bits for the plurality of equalized signals, and at least one selector to select one of the plurality of equalized signals that has a best metric from the computed metrics and to output the selected equalized signal.”

The patent application was filed on April 24, 2017 (15/495,124).

Peripheral component interconnect express controllers
configured with non-volatile memory express interfaces
Avago Technologies General IP, (Singapore), PTE. Ltd., Singapore, has been assigned a patent (9,841,902) developed by Baderdinni, Anant, Norcross, GA, and Simionescu, Horia Cristian, Milpitas, CA, for a “peripheral component interconnect express controllers configured with non-volatile memory express interfaces.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Systems and methods presented herein provide for SSD data storage via PCIe controllers configured with NVMe interfaces. In one embodiment, a PCIe controller includes a plurality of buffers, a Dynamic Random Access Memory, (DRAM) device, and an I/O processor operable to partition the DRAM device into a plurality of logical blocks. The controller also includes virtual function logic communicatively coupled to the logical blocks of the DRAM device and to the buffers. The virtual function logic is coupled to a host system through the I/O processor to process an I/O request from the host system to a logical block of the DRAM device, to retrieve data from the logical block to at least one of the buffers, and to transfer the data from the buffer to the host system.”

The patent application was filed on November 20, 2014 (14/548,828).

Multi-track data readers with iterative inter-track interference cancellation
Avago Technologies General IP, (Singapore), PTE. Ltd., Singapore, has been assigned a patent (9,786,316) developed by Mathew, George, San Jose, CA, Park, Jongseung, Allentown, PA, Rauschmayer, Richard, Longmont, CO, and Wilson, Bruce A., San Jose, CA, for a “multi-track data readers with iterative inter-track interference cancellation.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “An apparatus for two-dimensional magnetic recording includes an array reader comprising a number of read sensors configured to read data from at least one track on a storage medium, a number of two-dimensional equalizer circuits each comprising inputs for receiving signals derived from each of the read sensors, each comprising an equalized output, and a number of iterative inter-track interference cancellation circuits, each operable to cancel inter-track interference in a different one of the equalized outputs from the two-dimensional equalizer circuits.”

The patent application was filed on December 2, 2015 (14/957,349).

Magnetic recording system with ternary pattern dependent write signaling
Avago Technologies General IP, (Singapore), PTE. Ltd., Singapore, has been assigned a patent (9,754,610) developed by Wilson, Bruce A., San Jose, CA, Wilson, Ross S., Menlo Park, CA, and Windler, Peter J., Fort Collins, CO, for a “magnetic recording system with ternary pattern dependent write signaling.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A storage system includes a magnetic write head, a magnetic storage medium, a write data circuit having a write data output and a magnet length signal output, and a preamplifier that receives the write data and a magnet length signal from the write data circuit, and sets at least one write current characteristic through the magnetic write head based at least in part on the magnet length signal. The write data circuit processes write data to be recorded on the magnetic storage medium by the magnetic write head. The magnet length signal output communicates magnet lengths in the write data.”

The patent application was filed on December 21, 2015 (14/977,595).