Single chip microcomputer F330-based electrically tunable filter with frequency of 25-2,500 MHZ

Abstract

The invention provides a single chip microcomputer F330-based electrically tunable filter with the frequency of 25-2,500 MHZ. The electrically tunable filter comprises a control power supply, a firstvariable capacitance diode group, a second variable capacitance diode group, a third variable capacitance diode group, a first filter unit, a second filter unit and a third filter unit; the first variable capacitance diode group is connected with the first filter unit, the second variable capacitance diode group is connected with the second filter unit, the third variable capacitance diode group is connected with the third filter unit, and the first filter unit, the second filter unit and the third filter unit are connected with a waveband control circuit; and the first filter unit and the first variable capacitance diode group form a resonant circuit, the second filter unit and the second variable capacitance diode group form a resonant circuit, the third filter unit and the third variable capacitance diode group form a resonant circuit, and then the electrically tunable filter with the frequency of 25-2,500 MHZ is formed.

Description

technical field [0001] The present invention relates to the technical field of short-wave communication, and more specifically, relates to a 25-2500 MHZ electronically adjustable filter based on a single-chip microcomputer F330. Background technique [0002] The electronically tuned filter is a new type of radio frequency bandpass filter, which is an indispensable key device in modern digital communication and frequency modulation technology, especially the preferred device for improving the anti-interference ability of military software radio communication systems. [0003] Due to the advantages of small size, wide operating frequency band, fast tuning speed, and flexible design, electronically tuned filters have been widely used and developed in the field of radio frequency and reception in communication systems in recent years. However, most of the electric tuning filters at present, due to the characteristics of the tuning components and the limitation of the tuning volt...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a 25-2500MHZ electronically adjustable filter based on a single-chip microcomputer F330 that overcomes the above problems or at least partially solves the above-mentioned problems, and solves the problems of large volume and narrow frequency tuning range of the electronically adjustable filter in the prior art

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