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.
Designing external cabling for low EMI radiation News & Analysis 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
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.
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.
January 2016 Cartoon Caption ContestBob's punishment for missing his deadline was to be tied to his chair tantalizingly close to a disconnected cable, with one hand superglued to his desk and another to his chin, while the pages from his wall calendar were slowly torn away.122 comments