Download PDF by Almudena Suarez: Analysis And Design Of Autonomous Microwave Circuits

By Almudena Suarez

ISBN-10: 0470050748

ISBN-13: 9780470050743

Offers simulation ideas that considerably raise designers' regulate over the oscillationin independent circuits

This e-book enables a valid figuring out of the free-running oscillation mechanism, the start-up from the noise point, and the institution of the steady-state oscillation. It bargains with the operation ideas and major features of free-running and injection-locked oscillators, coupled oscillators, and parametric frequency dividers.

Analysis and layout of self sufficient Microwave Circuits provides:

  • An exploration of the most nonlinear-analysis equipment, with emphasis on harmonic stability and envelope temporary methods

  • Techniques for the effective simulation of the commonest self sufficient regimes

  • A presentation and comparability of the most stability-analysis equipment within the frequency domain

  • A distinctive exam of the instabilization mechanisms that delimit the operation bands of independent circuits

  • Coverage of thoughts used to put off universal sorts of undesired habit, akin to spurious oscillations, hysteresis, and chaos

  • A thorough presentation of the oscillator section noise

  • A comparability of the most methodologies of phase-noise analysis

  • Techniques for self sufficient circuit optimization, in response to harmonic balance

  • A attention of other layout targets: presetting the oscillation frequency and output energy, expanding potency, editing the brief period, and enforcing operation bands

Analysis and layout of independent Microwave Circuits is a important source for microwave designers, oscillator designers, and graduate scholars in RF microwave design.

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Additional info for Analysis And Design Of Autonomous Microwave Circuits

Sample text

Evolution of the oscillatory solution to its steady-state regime has to be determined through numerical integration. 10) are shown in Fig. 2, where the node voltage amplitude |v(t)| and the associated evolution of the damping term µ(v) = [a + G + 3bv 2 (t)]/C are represented. For small-signal |v(t)|, the damping term is nearly constant and negative, with the value µ(0) = (a + G)/C. This negative damping term is responsible for the initial exponential growth of the oscillation amplitude as e−[µ(0)]/2t .

The voltage auxiliary generator, connected in parallel at the transistor output node, is used for various analysis techniques presented in this chapter. 2 nH calculated originally will be considered instead of the high-Q load. This will allow a more general analysis of the oscillator dynamics, without the simplifications allowed by high-frequency selectivity. The circuit fulfills the oscillation startup conditions ZTr (I ∼ = 0, ωo )) < 0, ZTi (I ∼ = 0, ωo ) = 0, and ∂(ZTi (I ∼ = 0, ωo )/∂ω > 0 at the frequency fo = 5 GHz.

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 . 14) where T = 2π/ωo . Clearly, YN depends on the amplitude V of the voltage introduced but not on its phase φ, in agreement with previous discussions. To see this more clearly, a phase shift φ will be considered. This phase shift can be represented as φ = −ωo τ.

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Analysis And Design Of Autonomous Microwave Circuits by Almudena Suarez


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