Cover Story
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Internet Protocol: the
future route for telephony?
IP telephony promises free, feature-rich telephone services, but quality, reliability, and
security issues keep some industry experts doubting. To successfully implement the
technology, designers must consider chips, software, code longevity, and vendor support.
— George Ellis, Contributing Editor
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Design Features
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- Clock drivers ensure on-time arrival of high-speed signals
Programmable-skew PLL-based clock drivers can operate as true multifunction devices. Some
can divide, multiply, invert phases, and adjust phases while maintaining exceptionally low
output skew.
— Dan Andersen, Quality Semiconductor Inc
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- Measuring 16-bit settling times: the art of timely
accuracy
Accurately measuring the settling time of a 16-bit DAC and its output amplifier is an art
form. One measurement technique borrows from the design of a classic sampling oscilloscope
and provides reliable results. Three other measurement approaches produce results that
closely agree with each other.
— Jim Williams, Linear Technology
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Leading Edge
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Design Ideas
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Products
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Columnist
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- Analog Angle
Engineers, guerrillas, and roadrunners
—Ron Mancini
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How it works
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- Nice set of choppers!
CMOS circuitry, notorious for lousy analog performance, provides error-canceling chopper
techniques to deliver sterling analog performance.
—Bill Travis, Senior Technical Editor
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Departments
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- ednmag.comment
The case for diversity and political correctness
—Michael Markowitz, Editorial Director
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