How to acquire the input frequency from an unlocked state
A phase locked loop (PLL) by itself cannot become useful until
it has acquired the applied signal's frequency. Often, a PLL will
never reach frequency acquisition (capture) without explicit
assistive circuits. Curiously, few books on PLLs treat the topic of
frequency acquisition in any depth or detail. "Frequency
Acquisition Techniques for Phase Locked Loops" offers a no-nonsense
treatment that is equally useful for engineers, technicians, and
managers.
Since mathematical rigor for its own sake can degenerate into
intellectual "rigor mortis," the author introduces readers to the
basics and delivers useful information with clear language and
minimal mathematics. With most of the approaches having been
developed through years of experience, this completely practical
guide explores methods for achieving the locked state in a variety
of conditions as it examines: Performance limitations of
phase/frequency detector-based phase locked loopsThe
quadricorrelator method for both continuous and sampled
modesSawtooth ramp-and-sample phase detector and how its waveform
contains frequency error information that can be extractedThe
benefits of a self-sweeping, self-extinguishing topologySweep
methods using quadrature mixer-based lock detectionThe use of
digital implementations versus analog
"Frequency Acquisition Techniques for Phase Locked Loops" is an
important resource for RF/microwave engineers, in particular,
circuit designers; practicing electronics engineers involved in
frequency synthesis, phase locked loops, carrier or clock recovery
loops, radio-frequency integrated circuit design, and aerospace
electronics; and managers wanting to understand the technology of
phase locked loops and frequency acquisition assistance techniques
or jitter attenuating loops.Errata can be found by visiting the
Book Support Site at: http: //booksupport.wiley.com
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