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Filter capable of adjusting frequency response

A technique for adjusting frequency and frequency response, applied in the field of frequency response, which can solve problems such as design limitations of notch filters

Inactive Publication Date: 2013-01-30
RICHWAVE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art notch filter 100 cannot only change the frequency position of the pole frequency fp or the zero frequency fz, so that the pole frequency fp and the zero frequency fz are respectively located at the required frequency positions
Therefore, the design of the prior art notch filter 100 still has considerable limitations.

Method used

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  • Filter capable of adjusting frequency response
  • Filter capable of adjusting frequency response
  • Filter capable of adjusting frequency response

Examples

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Embodiment Construction

[0035] Please refer to image 3 , image 3 is a schematic diagram of the first embodiment of the filter 300 of the present invention. Such as image 3 As shown, the filter 300 includes a first variable capacitor Cv1, a second variable capacitor Cv2, and an inductor L. As shown in FIG. A first terminal of the first variable capacitor Cv1 is electrically connected to a signal input terminal IN. The first terminal of the second variable capacitor Cv2 is electrically connected to the second terminal of the first variable capacitor Cv1 , and the second terminal of the second variable capacitor Cv2 is electrically connected to a ground terminal. The first terminal of the inductor L is electrically connected to the second terminal of the first variable capacitor Cv1, and the second terminal of the inductor L is electrically connected to the ground terminal. Through the above configuration, since the capacitance value of the first variable capacitor Cv1 is adjustable, the filter 3...

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PUM

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Abstract

The invention discloses a filter capable of adjusting frequency response and a method for adjusting filter frequency response. The filter includes a first varactor with a first end electrically connected to a signal input end, a second varactor with a first end electrically connected to a second end of the first varactor, and a second end electrically connected to ground, and an inductor with a first end electrically connected to the second end of the first varactor, and a second end electrically connected to ground. The filter is capable of adjusting its frequency response by changing capacitance of the first varactor and / or the second varactor.

Description

technical field [0001] The invention relates to a filter, in particular to a filter with adjustable frequency response and a method for adjusting the frequency response of the filter. Background technique [0002] Please refer to figure 1 , figure 1 is a schematic diagram of a prior art notch filter 100 . Such as figure 1 As shown, the notch filter 100 includes a fixed capacitor C, a variable capacitor Cv, and an inductor L. As shown in FIG. The first terminal of the fixed capacitor C is electrically connected to a signal input terminal IN. The first terminal of the variable capacitor Cv is electrically connected to the second terminal of the fixed capacitor C, and the second terminal of the variable capacitor Cv is electrically connected to a ground terminal. The first terminal of the inductor L is electrically connected to the second terminal of the fixed capacitor C, and the second terminal of the inductor L is electrically connected to the ground terminal. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/01
CPCH03H7/01H03H2210/025H03H7/1791H03H2210/036H03H7/0153
Inventor 吴信达
Owner RICHWAVE TECH CORP
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