Tom Riley
 Write for Microwaves & RF
2 results found for Tom Riley, displaying items 1 - 2

January 2007   [Systems & Subsystems]
Sigma-Delta Synthesizer Steps Across Multiple Standards
Frequency synthesizers are fundamental building blocks in wireless systems. Market pressures drive higher levels of integration in support of multiple wireless standards. But each wireless standard requires a specific crystal reference frequency and specific channel spacing. Integer-N frequency synthesizers can achieve the small step sizes required in support of multiple standards, but with high phase noise. Fortunately, a sigma-delta fractional-N frequency synthesizer can combine...

March 2003   [Components]
Sampling IF filters Fortify Bluetooth Designs
Bluetooth system architects strive to reduce cost, component count, and power consumption while maintaining high production yields for both chips and modules. Traditionally, the first three requirements are met by integrating off-chip components....