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Content tagged with Semiconductors posted in December 2004
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Implementing a 3-Phase Brushless Direct Current Motor Drive
News & Analysis  
12/2/2004   Post a comment
Brushless dc motors have a straight-line, speed-torque curve similar to that of their mechanically commutated counterparts. BLDC motor internals consist of a multi-pole permanent magnet rotor and a stator with multiple coils linked together using a triangle or star connection. Cypress engineers offer the sequencing codes for driving brushless motors with Hall Effect sensors and an analog controller.
Companies rally around IBM's Power architecture
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12/2/2004   Post a comment
Fifteen companies, including chip designers and manufacturers, unveiled an open standards initiative centering on the Power microprocessor architecture.
Designing external cabling for low EMI radiation
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12/2/2004   Post a comment
The advent of equalizer circuits that compensate for cable loss allows systems to send high-speed data over very long copper cables. The use of integrated circuits for equalization of cable loss has enabled a major reduction in the cost of interconnects for communications systems. For optimum performance, such systems must minimize any radiated emissions from the cables and connectors. A Maxim engineer offers this assessment of EMI reduction techniques, including coax, twisted pair cabling and e
Fairchild expects to meet guidance, appoints new exec
News & Analysis  
12/1/2004   Post a comment
Fairchild Semiconductor announced Wednesday (Dec. 1) that improving order rates will lift the company's fourth quarter sales to the higher end of its previous guidance of down 5 to 10 percent sequentially.
Digitally set DC/DCs boost portables
Product News  
12/1/2004   Post a comment
San Jose, Calif. - Summit Microelectronics bills its SMB120 nine-channel DC/DC converter/controller as the first power-with-power-management IC for portable applications that's digitally programmable.
Attenuators pin down handset and infrastructure applications
Product News  
12/1/2004   Post a comment
M/A-COM announces a series of PIN diode voltage variable attenuators optimized for lower loss and higher linearity than FET devices.
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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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