1st Edition
by William F. Egan (Author)
The latest frequency synthesis techniques, including sigma-delta, Diophantine, and all-digital
Sigma-delta
is a frequency synthesis technique that has risen in popularity over
the past decade due to its intensely digital nature and its ability to
promote miniaturization. A continuation of the popular Frequency
Synthesis by Phase Lock, Second Edition, this timely resource provides a
broad introduction to sigma-delta by pairing practical simulation
results with cutting-edge research. Advanced Frequency Synthesis by
Phase Lock discusses both sigma-delta and fractional-n—the still-in-use
forerunner to sigma-delta—employing Simulink® models and detailed
simulations of results to promote a deeper understanding.
After a
brief introduction, the book shows how spurs are produced at the
synthesizer output by the basic process and different methods for
overcoming them. It investigates how various defects in sigma-delta
synthesis contribute to spurs or noise in the synthesized signal.
Synthesizer configurations are analyzed, and it is revealed how to trade
off the various noise sources by choosing loop parameters. Other
sigma-delta synthesis architectures are then reviewed.
The
Simulink simulation models that provided data for the preceding
discussions are described, providing guidance in making use of such
models for further exploration. Next, another method for achieving wide
loop bandwidth simultaneously with fine resolution—the Diophantine
Frequency Synthesizer—is introduced. Operation at extreme bandwidths is
also covered, further describing the analysis of synthesizers that push
their bandwidths close to the sampling-frequency limit. Lastly, the book
reviews a newly important technology that is poised to become widely
used in high-production consumer electronics—all-digital frequency
synthesis.
Detailed appendices provide in-depth discussion on
various stages of development, and many related resources are available
for download, including Simulink models, MATLAB® scripts, spreadsheets,
and executable programs. All these features make this authoritative
reference ideal for electrical engineers who want to achieve an
understanding of sigma-delta frequency synthesis and an awareness of the
latest developments in the field.
