LC elliptic function electrically-tunable filter

An electronically tuned filter and elliptic function technology, which is applied to electrical components, impedance networks, multi-terminal pair networks, etc., can solve problems such as narrow operating frequency band, large volume, and complex structure, and achieve stable operation, small volume, and reduced overall The effect of machine volume

Inactive Publication Date: 2010-12-01
DFINE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve technical problems such as low rectangular coefficient, narrow operating frequency band, complex structure, and large volume existing in the existing electric tuning filter, so as to provide an LC elliptic function with high rectangular number, operating frequency bandwidth, and small volume ESC filter

Method used

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Embodiment Construction

[0022] The detailed structure of the present invention, application principle, function and effect, refer to the appended figure 1 , which will be described through the following embodiments.

[0023] refer to figure 1 As shown, in the LC elliptic function electric tuning filter of the present invention, the input terminal 1 is sequentially connected in series with a chip capacitor-2, a chip inductor-3 and a four-level loop, and the four-level loop is from the first level loop to the fourth level loop connected in series, the circuit structure of the latter three stages is the same as that of the first stage circuit 20, and the input chip capacitors of the second to fourth stage circuits are connected to the output chip capacitors of the upper stage circuit;

[0024] Three loops are sequentially connected in parallel between the output terminal of the chip inductor 13 and the ground point, one loop is grounded after the chip inductor 24 is connected in series with the chip ca...

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Abstract

The invention provides an LC elliptic function electrically-tunable filter which relates to the field of electronic communications and aims at solving the technical problems of low rectangular factors, narrow working frequency band, complex structure, large size, and the like in the traditional electrically-tunable filter. The LC elliptic function electrically-tunable filter comprises a chip capacitor, a chip inductor, a chip resistor, a variable capacitance diode, and the like. The invention is suitable for the design of the electrically-tunable filter.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to an electronically adjustable filter used in communication industry fields such as radio frequency modulation, receiver and transmitter frequency selection, switch filtering and the like. Background technique [0002] In order to process signals in a complex information environment, a communication system requires filters to separate signals, select useful signals, and suppress stray interference signals, which are the most important parts of the entire communication system. There are also many kinds of electrically tuned filters on the market, but these electrically tuned filters are all realized by the conventional Chebyshev method. This type of electrically tuned filter mainly has the following disadvantages: [0003] 1. The rectangularity coefficient is not high and the operating frequency band is narrow. The rectangularity of the electric adjustable filter seen on the ...

Claims

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Application Information

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IPC IPC(8): H03H7/09
Inventor 李承泽彭飞姚华
Owner DFINE TECH
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