Broadband chaotic oscillating circuit

Abstract

A broadband chaotic oscillation circuit comprises a radio frequency triode, a frequency selection network module, a bias module and an output module. Wherein the frequency selection network module isconnected with the base electrode of the radio frequency triode to form a Colpitts oscillator, the bias module is connected with the base electrode and the emitter electrode of the radio frequency triode, and the collector electrode of the radio frequency triode is a signal output node and is connected with the output module. The circuit is based on a Colpitts oscillating circuit, and utilizes double-resistor voltage division bias to supply power to a base electrode of a radio frequency triode. And the resonant network positioned at the base electrode and the emitter electrode is matched withthe radio frequency triode to realize generation of chaotic signals. The signal output node is located at the collector electrode, the load resistor of the output module and the inductor connected with the collector electrode in series form an RLC series resonance network, the resonance network does not affect the circuit state, the signal frequency spectrum can be improved by adjusting the resonance frequency, and then broadband signal output is achieved. The circuit has high load capacity, can generate continuous broadband chaotic signals, has flat signal frequency spectrums, and is suitablefor broadband radio frequency wireless communication.

Description

technical field [0001] The invention belongs to the technical field of radio frequency wireless communication, and in particular relates to a broadband chaotic oscillation circuit. Background technique [0002] Chaotic signals have inherent randomness, nonlinearity, and noise-like characteristics, and the spectrum has broadband characteristics. It is one of the effective ways to solve secure communication and broadband communication, and has broad application prospects. [0003] Chaotic signals are generally generated by oscillating circuits. In the past, chaotic oscillating circuits included Wien bridge oscillators and Chua's circuits. This type of circuit generally uses an operational amplifier as a basic component. However, due to the operating speed of the operational amplifier, the fundamental frequency of the chaotic signal generated by the circuit is generally low, at the KHz and MHz level. Therefore, it cannot meet the scene application with higher fundamental frequ...

AI Technical Summary

Problems solved by technology

However, due to the influence of the parasitic parameters of the nonlinear element itself, it is difficult to obtain a chaotic signal with a higher fundamental frequency

Also limited by the cut-off frequency and parasitic parameters of the nonlinear device itself, it becomes difficult to obtain continuous broadband chaotic signals

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