By Daniel B. Talbot
How to procure the enter frequency from an unlocked state
A section locked loop (PLL) on its own can't develop into important till it has obtained the utilized signal's frequency. usually, a PLL won't ever succeed in frequency acquisition (capture) with no particular assistive circuits. interestingly, few books on PLLs deal with the subject of frequency acquisition in any intensity or element. Frequency Acquisition strategies for section Locked Loops bargains a no-nonsense remedy that's both worthy for engineers, technicians, and managers.
Since mathematical rigor for its personal sake can degenerate into highbrow "rigor mortis," the writer introduces readers to the fundamentals and supplies valuable info with transparent language and minimum arithmetic. With many of the ways having been built via years of expertise, this thoroughly useful consultant explores equipment for attaining the locked nation in quite a few stipulations because it examines:
- Performance barriers of phase/frequency detector–based part locked loops
- The quadricorrelator procedure for either non-stop and sampled modes
- Sawtooth ramp-and-sample section detector and the way its waveform comprises frequency mistakes details that may be extracted
- The advantages of a self-sweeping, self-extinguishing topology
- Sweep equipment utilizing quadrature mixer-based lock detection
- The use of electronic implementations as opposed to analog
Frequency Acquisition strategies for part Locked Loops is a crucial source for RF/microwave engineers, particularly, circuit designers; practising electronics engineers all in favour of frequency synthesis, part locked loops, provider or clock restoration loops, radio-frequency built-in circuit layout, and aerospace electronics; and executives eager to comprehend the expertise of section locked loops and frequency acquisition counsel recommendations or jitter attenuating loops.
Errata are available by means of traveling the e-book aid web site at: http://booksupport.wiley.com
Content:
Chapter 1 creation (pages 1–2):
Chapter 2 A overview of PLL basics (pages 3–15):
Chapter three Simulating the PLL Linear Operation Mode (pages 17–20):
Chapter four Sideband Suppression Filtering (pages 21–23):
Chapter five execs and Cons of Sampled facts part Detection (pages 25–32):
Chapter 6 section Compression (pages 33–34):
Chapter 7 difficult proscribing of a sign Plus Noise (pages 35–37):
Chapter eight part Noise and different Spurious Interferers (pages 39–46):
Chapter nine Impulse Modulation and Noise Aliasing (pages 47–51):
Chapter 10 Time and section Jitter, Heterodyning, and Multiplication (pages 53–56):
Chapter eleven service restoration purposes and Acquisition (pages 57–72):
Chapter 12 Notes on Sweep tools (pages 73–83):
Chapter thirteen Nonsweep Acquisition tools (pages 85–103):
Chapter 14 AM Rejection in Frequency Detection Schemes (pages 105–118):
Chapter 15 Interfacing the Frequency Discriminator to the PLL (pages 119–124):
Chapter sixteen genuine Frequency Discriminator Implementations (pages 125–143):
Chapter 17 Clock restoration utilizing a PLL (pages 145–164):
Chapter 18 Frequency Synthesis functions (pages 165–194):
Chapter 19 Injection Pulling of a number of VCO's as in a Serdes (pages 195–197):
Chapter 20 electronic PLL instance (pages 199–202):
Chapter 21 end (pages 203–204):
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Extra resources for Frequency Acquisition Techniques for Phase Locked Loops
Sample text
It is apparent that the noise is converted to jitter on the signal edges, since the limiter strips away any amplitude modulation. We can explain this very graphically Frequency Acquisition Techniques for Phase Locked Loops, Daniel B. Talbot. Ó 2012 by the Institute of Electrical and Electronics Engineers, Inc. Published 2012 by John Wiley & Sons, Inc. 1 Two sinusoid amplitudes plus same noise into and out of a hard limiter (comparator). using vectors. 2 shows a main signal of unity amplitude with a secondary signal vector of amplitude b superimposed on it.
4 C. , if it is edge triggered). A J/K flip may be a more elegant implementation, but the simplicity of the edge-triggered S/R flip-flop lends itself to the explanation of the approach. 6. V1 is a train of positive-going impulses that trigger the SET input of an S/R flip-flop. V2 is a train of similar impulses but shifted in phase from V1. If the reset impulse occurs soon after the “set” impulse, the flip-flop will assume the “set” state for less duration than when the reset impulses occur later, so the average duty factor will be close to zero.
This ensemble can be decomposed into an AM signal vector ensemble and a PM signal vector ensemble as shown. The hard limiter strips away the in-phase vector pair of the AM ensemble’s counterrotating doublet but leaves the PM vector pair superimposed on the signal’s principal vector. Notice that each vector in the pair now contributes b=2 in units of voltage. Each secondary PM vector now represents exactly 6 dBc less than represented by the original unlimited secondary vector. Thus, hard limiting of a signal accompanied by a single spurious artifact causes a pair of PM sidebands to be created, one at vc À vsb and one at vc þ vsb , where vc ¼ frequency of the main signal and vsb ¼ frequency of the artifact.