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Weak signal detection is very important in the downhole acoustic telemetry system. This paper introduces the Duffing oscillator weak signal detection method for the downhole acoustic telemetry systems. First, by solving the Duffing equation, analyzed the dynamics characteristic of Duffing oscillator and weak signal detection principle; and then on this basis, built Duffing oscillator circuit based...
This paper presents a random bit source circuit for information security SoC platform application. A new type of oscillator, taking the form of combinational logic circuit and using complex feedback networks, is applied in the circuit. A series of MATLAB/Simulink models based on the circuit structure are established for the random bit source. To improve the accuracy, models for the two dominant noise...
In this paper an approach to behavioral modeling of microwave oscillators is described. The presented model takes into account start-up, steady state behavior and phase noise. To describe the nonlinearities, an artificial neural network (ANN) is employed. The dynamic behavior of the oscillator is described by a system of differential equations that are solved in VHDL-AMS. As opposed to input-output...
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