CN104022755A - Novel anti-alias filter - Google Patents
Novel anti-alias filter Download PDFInfo
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- CN104022755A CN104022755A CN201410189628.0A CN201410189628A CN104022755A CN 104022755 A CN104022755 A CN 104022755A CN 201410189628 A CN201410189628 A CN 201410189628A CN 104022755 A CN104022755 A CN 104022755A
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- frequency
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Abstract
A novel anti-alias filter eliminates frequency aliasing caused when frequency smaller than the Nyquist frequency is adopted, and enables a filtered signal to get close to an original signal. The anti-alias filter comprises a zero setting circuit, a gain adjusting circuit and a six-order active low-pass filter. The novel anti-alias filter eliminates frequency aliasing caused by input detuning at the input end of an operational amplifier under the working condition with high-voltage magnification times, and enables the filtered signal to get close to the original signal.
Description
Technical field:
The present invention relates to a kind of novel antialiasing filter, this filter is eliminated under high voltage multiplication factor under condition of work the frequency aliasing causing of lacking of proper care of the input due to operational amplifier input, makes filtered signal approach original signal.This filter comprises a zeroing circuit, adjusts gain circuitry and six rank active low-pass filters for one.
Background technology:
Filter is a kind of electric component of harmonic wave to effect on power system that be used for reducing or eliminating, and obtains pure direct current by inputing or outputing through filtration.On filter, marine permanent electronic filter generally has two ports, an input signal, an output signal, utilize this characteristic can gating by a square wave group or the compound ripple of making an uproar of filter, and obtain the sine wave of a characteristic frequency.The circuit that frequency beyond frequency to characteristic frequency or this frequency is carried out effective filtering, is exactly filter, and its function obtains exactly a characteristic frequency or eliminates a characteristic frequency.
Summary of the invention:
This new architecture, in order to solve the deficiencies in the prior art, meets client's requirement, and a kind of novel antialiasing filter is provided.
Technical problem to be solved by this invention realizes by the following technical solutions.
A novel antialiasing filter, is characterized in that: eliminate because proportion is less than the frequency aliasing that Lai Kuisi distinct frequence causes, make filtered signal approach original signal.Frequency overlapped-resistable filter comprises a zeroing circuit, adjusts gain circuitry and six rank active low-pass filter compositions for one.
Described zeroing circuit, makes original signal be output as zero in the time of zero input, and the adjusting range of offset voltage is ± V simultaneously
d ×(R4/R3).
Described tune gain circuitry, is the adjustable amplifying circuit of voltage gain, can amplify the voltage signal after zeroing.
Six described rank active low-pass filters, in series by three step low-pass active filters, by the radio-frequency component of filtered signal, make system there is the response of open width degree, and be greater than after cut-off frequency, amplitude-frequency response declines rapidly.
Compared with the prior art, beneficial effect of the present invention is embodied in:
This filter is eliminated under high voltage multiplication factor under condition of work the frequency aliasing causing of lacking of proper care of the input due to operational amplifier input, makes filtered signal approach original signal.
Brief description of the drawings:
Fig. 1 is circuit diagram of the present invention;
Embodiment:
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
A novel antialiasing filter, eliminates because proportion is less than the frequency aliasing that Lai Kuisi distinct frequence causes, makes filtered signal approach original signal.Frequency overlapped-resistable filter comprises a zeroing circuit, adjusts gain circuitry and six rank active low-pass filter compositions for one.
Described zeroing circuit, makes original signal be output as zero in the time of zero input, and the adjusting range of offset voltage is ± V simultaneously
d ×(R4/R3).
Described tune gain circuitry, is the adjustable amplifying circuit of voltage gain, can amplify the voltage signal after zeroing.
Six described rank active low-pass filters, in series by three step low-pass active filters, by the radio-frequency component of filtered signal, make system there is the response of open width degree, and be greater than after cut-off frequency, amplitude-frequency response declines rapidly.
More than show and described general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (4)
1. a novel antialiasing filter, is characterized in that: eliminate because proportion is less than the frequency aliasing that Lai Kuisi distinct frequence causes, make filtered signal approach original signal.Frequency overlapped-resistable filter comprises a zeroing circuit, adjusts gain circuitry and six rank active low-pass filter compositions for one.
2. according to a kind of novel antialiasing filter described in the requirement of claim 1, it is characterized in that: described zeroing circuit, make original signal be output as zero in the time of zero input, the adjusting range of offset voltage is ± V simultaneously
d ×(R4/R3).
3. according to a kind of novel antialiasing filter described in the requirement of claim 1, it is characterized in that: described tune gain circuitry is the adjustable amplifying circuit of voltage gain, can amplify the voltage signal after zeroing.
4. according to a kind of novel antialiasing filter described in the requirement of claim 1, it is characterized in that: six described rank active low-pass filters, in series by three step low-pass active filters, by the radio-frequency component of filtered signal, make system there is the response of open width degree, and be greater than after cut-off frequency, amplitude-frequency response declines rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189628.0A CN104022755A (en) | 2014-05-06 | 2014-05-06 | Novel anti-alias filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189628.0A CN104022755A (en) | 2014-05-06 | 2014-05-06 | Novel anti-alias filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104022755A true CN104022755A (en) | 2014-09-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410189628.0A Pending CN104022755A (en) | 2014-05-06 | 2014-05-06 | Novel anti-alias filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104022755A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1681199A (en) * | 2004-02-12 | 2005-10-12 | 因芬尼昂技术股份公司 | Method and device for amplifying a reception signal |
| US7034731B2 (en) * | 2003-12-10 | 2006-04-25 | Matsushita Electric Industrial Co., Ltd. | A/D converter apparatus and D/A converter apparatus including a digital filter |
| CN101762743A (en) * | 2009-12-31 | 2010-06-30 | 上海宝钢安大电能质量有限公司 | Three phase electrical measurement method based on positive-sequence component computation |
-
2014
- 2014-05-06 CN CN201410189628.0A patent/CN104022755A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7034731B2 (en) * | 2003-12-10 | 2006-04-25 | Matsushita Electric Industrial Co., Ltd. | A/D converter apparatus and D/A converter apparatus including a digital filter |
| CN1681199A (en) * | 2004-02-12 | 2005-10-12 | 因芬尼昂技术股份公司 | Method and device for amplifying a reception signal |
| CN101762743A (en) * | 2009-12-31 | 2010-06-30 | 上海宝钢安大电能质量有限公司 | Three phase electrical measurement method based on positive-sequence component computation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160315 Address after: 230000 Hefei province high tech Zone, Yulan Road, No. 767, industrial park, building No. 10, north of the floor, floor, floor, 2 Applicant after: ANHUI CANBANG ELECTRIC CO., LTD. Address before: 125 602, room 230000, West Village, Anju village, Chencun South Road, Shushan District, Hefei, Anhui Applicant before: Liu Yejun Applicant before: Zhang Quansen |
|
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140903 |