Broadcom Corporation

Avago Technologies General IP (singapore) Pte. Ltd.

Spin Memory, Inc.

Magic Technologies, Inc.

Alliance Fiber Optic Products, Inc.

Alliance Fiber Optics Products, Inc.

Minh Quang Tran

Zhupei Shi

Wael William Diab

Chao-Hung Chang

James Jiahua Yu

Peter C Chang

Yuqiao Liu

Sesha Thalpasai Panguluri

James Jacob Yu

Lejan Pu

PoKang Wang

Perng-Fei Yuh

Tongxin Lu

Jerry Lee

Lee Zhang

Jay Dehkordi

A system and method for testing a magnetic memory cell in a bit cell array to determine whether the electrical resistance values of the memory cell are within acceptable parameters. The system and method allows for the determination of the electrical resistance of the memory cell without parasitic resistance associated with that memory cell in order to accurately determine the electrical resistance of the memory cell.

Measurement of MTJ in a compact memory array

System, method and apparatus for one-pair power over Ethernet in an automotive application. In one embodiment, a power sourcing equipment transmits a forward path current to a powered device via a single conductor pair and receives a return path current from the powered device via a chassis of an automotive vehicle.

System, method and apparatus for one-pair power over ethernet in an automotive application

Systems and methods for realizing current drivers without current or voltage feedback for devices that require accurate current drive with zero standby current has been disclosed. In a preferred embodiment of the invention this current driver is applied for write circuits for MRAMs. A fast and accurate reference current is generated by diode voltage divided by resistor without any feedback. The diode current is not fed back from the reference current. The diode current is generated from a regulated voltage. Temperature compensation of the write current is inherently built in the diode current reference. Fine-tuning of the temperature coefficient is achieved by mixing poly and diffusion resistors. A switch inserted in the current driver can turn on the driver fast and without a need for standby current. Leading boost in the current driver can fast charge the large coupling capacitance of word and bit lines and speed up write timing.

Fast and accurate current driver with zero standby current and features for boost and temperature compensation for MRAM write circuit

A system and method for enabling power applications over a single conductor pair. In one embodiment, data transformers are coupled to a single conductor pair using one or more direct current (DC) blocking elements that preserve an alternating current path. Power is injected onto the single conductor pair after the DC blocking elements and power is extracted from the single conductor pair before the DC blocking elements. Saturation of the data transformers by the injection of power onto the single pair is thereby prevented.

Capacitor coupled Ethernet

A controllable attenuator includes a pair of collimators respectively connected to input and output fibers. A pair of reflection devices are respectively positioned behind the pair of collimators opposite to the corresponding input and output fibers. A U-like light path is defined among the pair of collimators and the pair of reflection devices. A neutral density filter is moveably positioned between the pair of reflection devices wherein a moving direction of the filter is preferably parallel to a longitudinal direction of the pair of collimators. An ND filter position indicator such as a potentiometer, is used to dynamically monitor attenuation setting.

Controllably variable optical attenuator

A variable optical attenuator ( ) comprises a dual fiber collimator ( ) and a reflection component ( ) separated by a linear moveable ND filter ( ). The collimator ( ) includes a ferrule ( ) with dual fibers ( ) therein, and a GRIN lens ( ) spaced from the ferrule ( ) with a distance in compliance with the distance between the reflection component ( ) and the GRIN lens ( ).

Dual fiber variable optical attenuator

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San Jose, CA, United States of America

Minh Quang Tran