Projeto de um demodulador sincrono de frequencia utilizando o fenomeno "injection-locking"

AUTOR(ES)
DATA DE PUBLICAÇÃO

1991

RESUMO

This work proposes a new frequency demodulation technique using the principle of injection locking oscillation, with application to Broadcast FM and TV signals. It is well know that the signal generated by a nonlinear oscillating system can be synchronized to an external source when appropriated frequency and power conditions are present. This ?Locking? is know as ?Injection locking? or ?Injection synchronization? Injection locking has been studied since the pioneering work done by Van der Pol in the twenties. In spite of that, the application of the principles has been limiter to microwave system, to perform tasks like amplifyling limiting and detecting FM or PM signals. We believe that ours is the first proposition using the principle of ?injection locking? outside the microwave field. In chapter I the usual techniques for frequency demodulation are briefly rewied and some relations useful for the evaluation of the circuit are emphazised. In chaper II a detailed presentation of this apllication is developed, using the usual tools of electrical engineering cicuit design, some relations are deduce, which provide, with the results of simulation, conditions for reliable designs. The analysis of the performance for the proposed demodulator, as well the I.C design and evaluation (experimental results) are presented chapters III and IV, respectively ... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

moduladores (eletronica) sincronização

ACESSO AO ARTIGO

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