News

• Accelerometers go mainstream 1/12/2007

  Now in their second decade of commercialisation, MEMS (microelectro- mechanical systems) technologies make possible devices as diverse as cardiac monitors, inkjet-printer dispensers, and optical multiplexers. But for many electronics ....

  BROADBAND-TRANSCEIVER-CHIP MAKER TARGETS WiMAX BASE-STATION SOCKETS 1/12/2007

  Lime Microsystems is a fabless semiconductor start-up based in the UK that has been developing transceiver technology for use with wireless standards such as WiMax. The company has announced a reference design for a MicroTCA-format card ....

  MEMS oscillator maker aims to oust quartz 1/12/2007

  Replacing quartz as the frequency reference in clock and timing oscillators is the ambition of SiTime, a company that is currently bringing its MEMS-based oscillators into volume production. It says that its technology ....

  7W LED-driver IC provides 350 mA 1/12/2007

  Targeting use in tunnel-lighting, automotive-lighting, and similar applications, the new Catalyst Semiconductor CAT4201 buck-regulator driver can deliver ....

  Battery monitor also enables constant-power-boost converter 1/12/2007

  Some microcontrollers permit operation below a supply voltage of 3V. This feature allows powering directly from a 3V alkaline or lithium battery without the voltage drop and leakage current of a regulator. It is important ....

  Circuit for measuring motor speed uses low-cost components 1/12/2007

  ThTiesx Dt esign Idea uses a microcontroller, a 16x2-key LCD, and a rotary encoder to measure and visualize the speed of a motor (Figure 1). You measure the rotor speed ....

  Autozeroed amplifier with halved noise needs few components 1/12/2007

  The Analog Devices (www.analog.com) AD8553 autozeroed instrumentation amplifier has a unique architecture in that its two gain-setting resistors have no common junction (Reference ....

  Use a TL431 shunt regulator to limit high ac input voltage 1/12/2007

  Most isolated, offline SMPSs (switched-mode power supplies), including flyback, forward, and resonant, must operate at input voltages of 90 to 260V rms. Some cases even use line-to-line voltages of 400V rms±10%, ....

  Selecting Op Amps 1/12/2007

  You would think that selecting operational amplifiers would be easy. After all, they have only three important pins: two ....

  Distributed linear regulators increase output current and spread the heat 1/11/2007

  Modern system boards include big, current hungry digital ICs along with a broad mix of other lower-current digital and analog circuitry. Such a system board can require as many as five or six power supplies, depending on ....

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