Memristor based frequency-adjustable sine wave oscillating circuit

Abstract

The invention belongs to the technical field of oscillating circuits and particularly relates to a memristor based frequency-adjustable sine wave oscillating circuit. The technical scheme includes that the memristor based frequency-adjustable sine wave oscillating circuit is formed by a common-emitter cascade amplifying circuit (1), a frequency selective network (3) and a control module (2), wherein the frequency selective network (3) is connected with the common-emitter cascade amplifying circuit (1) and the control module (2). An input end V1i and an output end V1o of the common-emitter cascade amplifying circuit (1) are respectively connected with the frequency selective network (3), and an output end V1o of the common-emitter cascade amplifying circuit (1) is connected with an input end Vw of a peripheral circuit. The memristor based frequency-adjustable sine wave oscillating circuit has the advantages of easiness in oscillation starting, high stability and easiness in realizing automatic control.

Description

technical field [0001] The invention belongs to the technical field of oscillation circuits. In particular, it relates to a memristor-based frequency-adjustable sine wave oscillation circuit. Background technique [0002] The current whose size and direction change with the cycle is called an oscillating current, and a circuit that can generate an oscillating current is called an oscillating circuit. There are many types of oscillating circuits. According to the waveform of the signal, they can be divided into sine wave and non-sinusoidal oscillating circuits. Usually, the sine wave oscillating circuit composed of inductors and capacitors in the frequency selection network is called LC sine wave oscillating circuit. From a structural point of view, the sine wave oscillating circuit is a positive feedback amplifier circuit with a frequency selection network without an input signal. To make the sine wave oscillating circuit produce continuous oscillation, the conditions of am...

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Problems solved by technology

[0003] Because the amplitude balance condition requires high matching of component parameters, the traditional LC sine wave oscillation circuit is not easy to start oscillation

In order to realize the adjustable oscillation frequency, variable capacitors are generally used to replace the capacitance in the frequency selection network, and the oscillation frequency of the circuit is changed by adjusting the capacitance value of the variable capacitor. Because the stability of the mechanical variable capacitor is not high, and it is not easy to To achieve automatic control, these deficiencies largely affect the stability of the oscillation circuit when adjusting the oscillation frequency

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