Almudena Suarez's Analysis and Design of Autonomous Microwave Circuits (Wiley PDF

By Almudena Suarez

ISBN-10: 0470050748

ISBN-13: 9780470050743

Provides simulation options that considerably raise designers' keep watch over over the oscillationin self sufficient circuits
This ebook allows a legitimate knowing of the free-running oscillation mechanism, the start-up from the noise point, and the institution of the steady-state oscillation. It offers with the operation rules and major features of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers.
Analysis and layout of self sustaining Microwave Circuits provides:
An exploration of the most nonlinear-analysis tools, with emphasis on harmonic stability and envelope brief methods
Techniques for the effective simulation of the most typical independent regime
A presentation and comparability of the most stability-analysis equipment within the frequency domain
A targeted exam of the instabilization mechanisms that delimit the operation bands of independent circuits
Coverage of recommendations used to put off universal different types of undesired habit, akin to spurious oscillations, hysteresis, and chaos
A thorough presentation of the oscillator part noise
A comparability of the most methodologies of phase-noise analysis
Techniques for self sustaining circuit optimization, according to harmonic balance
A attention of alternative layout targets: presetting the oscillation frequency and output energy, expanding potency, enhancing the temporary period, and implementing operation bands
Analysis and layout of independent Microwave Circuits is a helpful source for microwave designers, oscillator designers, and graduate scholars in RF microwave layout.

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Additional resources for Analysis and Design of Autonomous Microwave Circuits (Wiley Series in Microwave and Optical Engineering)

Sample text

The second equation, Im[YT ] = 0, implies the existence of a resonance at the oscillation frequency. The next objective is to obtain the nonlinear admittance function YN (V , ω), which constitutes the model of the active element in the approximate oscillator analysis. The model is based on use of the describing function. For a sinusoidal describing function [16], the input signal is represented by a sinusoid. Considering the nonlinearity i(t) = i(v(t)), the describing function will provide an admittance model YN (V ), depending on the voltage amplitude V .

2268 × 10−16 . Its positive sign indicates a stable solution. 23) will be positive for an angle αvω , defined as αvω = ang(∂YT o /∂ω) − ang(∂YT o /∂V ), between 0 and π. Thus, the sign of σo can be determined graphically by tracing ∂YT o /∂V and ∂YT o /∂f in a polar plot (Fig. 11). 12 Oscillatory solution: reaction of the voltage amplitude at the drain node to an instantaneous perturbation applied at tp = 30 ns. The oscillatory solution is stable, so the amplitude recovers its initial value after an exponential transient.

Even if the oscillation is stable, which implies that σo < 0, the phase perturbation φ(t) = c2 , with c2 determined by the initial value, will remain in the steady-state solution. 27) has a great conceptual interest. It enables the stability analysis of the steady-state oscillation, limited to two poles. Because one of the poles is necessarily zero, due to the autonomy of the free-running oscillator solution, the other pole must be real. In the case of an oscillator circuit with a single-resonant circuit, such as in Fig.

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Analysis and Design of Autonomous Microwave Circuits (Wiley Series in Microwave and Optical Engineering) by Almudena Suarez


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