Simplifying BLDC commutation and feedback system Design How-To 3/31/2009 Post a comment In a Brushless DC (BLDC) motor system, an electronic mechanism
is required to commutate the system. Unlike a Brush DC motor system,
the permanent magnet is located at the Rotor and the windings are
located at the Stator. As a result of this setup arrangement, the
windings are required to energize in sequence, to enable smooth
commutation. For the electronic system to determine which windings to
energize, Hall sensor feedback is used to get the current location of
the windings with respect to the
Mobile operators seal, extend network sharing deals News & Analysis 3/23/2009 Post a comment In a wide-ranging cost cutting deal that will have major implications for their equipment suppliers, and further down the chain for many component suppliers, Vodafone and Telefonica have confirmed they will pool their mobile networks in the U.K and said that the deal covers several other European countries.
Making Automotive DC-motor driving simple and safe Design How-To 3/5/2009 Post a comment An increasing number of high-power DC motors are used in many automotive applications. Being smaller and lighter than previous versions, they have to draw higher currents in order to offer a suitable torque. The article describes a highly integrated MOSFET H-bridge for this purpose.
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