Memristor-based bandwidth adjustable filter circuit and operation method thereof

A technology of low-pass filter circuit and memristor, which is applied in the direction of electrical components, impedance networks, networks using active components, etc., can solve the problem that filter circuits cannot realize bandwidth adjustment, and achieve simple structure, high integration, and The effect of fast erasing and writing speed

Active Publication Date: 2017-01-04
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to provide a memristor-based bandwidth-adjustable filter circuit, aiming to solve the technical problem that the filter circuit in the prior art cannot realize bandwidth-adjustable

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  • Memristor-based bandwidth adjustable filter circuit and operation method thereof
  • Memristor-based bandwidth adjustable filter circuit and operation method thereof
  • Memristor-based bandwidth adjustable filter circuit and operation method thereof

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The present invention provides a memristor-based low-pass filter circuit with adjustable bandwidth, including: a resistive variable element M, a capacitor C1, an operational amplifier A, a first NMOS transistor, a second NMOS transistor, a third PMOS transistor, a first Four PMOS tubes, the fifth NMOS tube, the sixth NMOS tube, the seventh PMOS tube, and the eighth PMOS tube; one end of the resistive element M is used as a signal input terminal Vin connected to an external circuit, and the other end is connected to an operational amplifier. The positive input terminal is connected; one end o...

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Abstract

The invention discloses a memristor-based bandwidth adjustable low-pass filter circuit and an operation method thereof. The circuit is composed of a first-order active low-pass filter circuit including a memristor and a programming circuit including a memristor. The threshold voltage characteristics of the memristor are utilized, the working modes of the memristor are divided into an analog working mode and a programming working mode, and the bandwidth of the filter circuit is changed by changing the resistance value of the memristor. The programming circuit is composed of the memristor, four NMOS tubes and four PMOS tubes. The first-order active filter circuit is composed of the memristor, a capacitor and an operational amplifier. The invention also discloses a memristor-based bandwidth adjustable high-pass filter circuit and an operation method thereof. The circuit has the advantages that the active filter circuit is low in input impedance and high in output impedance, and the programming circuit has the advantages of being small in volume occupation, high in degree of integration, low in power consumption and easy to operate so that the circuit is suitable for signal filtering processing.

Description

technical field [0001] The invention belongs to the technical field of analog circuits, and more specifically relates to a memristor-based filter circuit with adjustable bandwidth and an operation method thereof. Background technique [0002] Filter circuit is an electronic device that can pass useful frequency signals while suppressing unwanted frequency signals. It is commonly used in engineering for signal processing, data transmission, and interference suppression. Analog filters are often composed of passive components, resistors, capacitors, and integrated operational amplifiers to form active filter circuits, which have the advantages of no inductor, small size, and light weight. Analog filters are essential in many communications and signal path applications. Compared with traditional filter circuits, small geometric size, low power dissipation, and simple programmability will be the direction of development, and memristors are a powerful choice to realize the expec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/12
CPCH03H11/1217H03H11/1221
Inventor 孙华军宋夷斌陆家豪缪向水
Owner HUAZHONG UNIV OF SCI & TECH
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