Overcoming the agility limitations of conventional frequency
synthesizers in multi-band OFDM ultra wideband is a key research
goal in digital technology. This volume outlines a frequency plan
that can generate all the required frequencies from a single fixed
frequency, able to implement center frequencies with no more than
two levels of SSB mixing. It recognizes the need for future
synthesizers to bypass on-chip inductors and operate at low
voltages to enable the increased integration and efficiency of
networked appliances. The author examines in depth the architecture
of the dividers that generate the necessary frequencies from a
single base frequency and are capable of establishing a fractional
division ratio.
Presenting the first CMOS inductorless single PLL 14-band
frequency synthesizer for MB-OFDMUWB makes this volume a key
addition to the literature, and with the synthesizer capable of
arbitrary band-hopping in less than two nanoseconds, it operates
well within the desired range on a 1.2-volt power supply. The
author's close analysis of the operation, stability, and phase
noise of injection-locked regenerative frequency dividers will
provide researchers and technicians with much food for
developmental thought.
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