CN102403984A - Combined quartz filter - Google Patents
Combined quartz filter Download PDFInfo
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- CN102403984A CN102403984A CN2010102796737A CN201010279673A CN102403984A CN 102403984 A CN102403984 A CN 102403984A CN 2010102796737 A CN2010102796737 A CN 2010102796737A CN 201010279673 A CN201010279673 A CN 201010279673A CN 102403984 A CN102403984 A CN 102403984A
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- quartz filter
- quartz
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- filter
- capacitor
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- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
The invention is applicable to the field of electronic technique and provides a combined quartz filter. The combined quartz filter comprises more than three quartz filters which are in series connection in sequence and more than two capacitors having adjusting effect on waveform amplitude. Each capacitor is in series connection between a connecting point of two quartz filters and the ground, and the ground end of each quartz filter is connected with the ground. A plurality of quartz filters are connected in series to form superposition of vibration, a plurality of capacitors are connected in parallel and coupled to produce the effect of adjusting the waveform amplitude, and the whole combined quartz filter has technical effects of high accuracy, narrow attenuation band and high attenuation.
Description
Technical field
The invention belongs to electronic technology field, relate in particular to a kind of combination quartz filter.
Background technology
Quartz filter just is meant the quartz-crystal filter made from quartz material, plays filtering, has the characteristics stable, that interference free performance is good, is widely used in the various electronic products.
But existing quartz filter exists that the frequency range error is big, stopband is wide, the problem of degree of decay difference, therefore can't satisfy the specification requirement of high accuracy, narrow resistance band, high decay.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of combination quartz filter, is intended to solve existing quartz filter and has that the frequency range error is big, stopband is wide, the problem of degree of decay difference.
The embodiment of the invention is to realize like this; A kind of combination quartz filter; Said combination quartz filter comprises the quartz filter more than three of serial connection successively; Said combination quartz filter also comprises the plural electric capacity of regulating the wave-shape amplitude effect that plays, said each capacitance series between the tie point and ground of two quartz filters, the ground end ground connection of said each quartz filter.
In the said structure; Said combination quartz filter comprises first quartz filter, second quartz filter, the 3rd quartz filter, the 4th quartz filter, capacitor C 1, capacitor C 2 and capacitor C 3; Said first quartz filter, second quartz filter, the 3rd quartz filter and the 4th quartz filter are connected in series successively; Said capacitor C 1 is serially connected between the tie point and ground of first quartz filter and second quartz filter; Said capacitor C 2 is serially connected between the tie point and ground of second quartz filter and the 3rd quartz filter; Said capacitor C 3 is serially connected between the tie point and ground of the 3rd quartz filter and the 4th quartz filter, and equal ground connection is held on the ground of said first quartz filter, second quartz filter, the 3rd quartz filter and the 4th quartz filter.
In embodiments of the present invention, employing is in series by a plurality of quartz filters and vibrates stack, and a plurality of electric capacity parallel coupled have formed the wave-shape amplitude effect of regulating, and whole combination quartz filter reaches a high accuracy, narrow resistance band, high technique effect of decaying.
Description of drawings
Fig. 1 is the structure chart of the combination quartz filter that provides of the embodiment of the invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The combination quartz filter comprises the quartz filter more than three of serial connection successively; The combination quartz filter also comprises the plural electric capacity of regulating the wave-shape amplitude effect that plays; Each capacitance series between the tie point and ground of two quartz filters, the ground end ground connection of each quartz filter.
Fig. 1 shows the structure of the combination quartz filter that the embodiment of the invention provides, and for the ease of explanation, only shows the part relevant with the embodiment of the invention.
As one embodiment of the invention; The combination quartz filter comprises the first quartz filter A1, the second quartz filter A2, the 3rd quartz filter A3, the 4th quartz filter A4, capacitor C 1, capacitor C 2 and capacitor C 3; The first quartz filter A1, the second quartz filter A2, the 3rd quartz filter A3 and the 4th quartz filter A4 are connected in series successively; Capacitor C 1 is serially connected between the tie point and ground of the first quartz filter A1 and the second quartz filter A2; Capacitor C 2 is serially connected between the tie point and ground of the second quartz filter A2 and the 3rd quartz filter A3; Capacitor C 3 is serially connected between the tie point and ground of the 3rd quartz filter A3 and the 4th quartz filter A4, and equal ground connection is held on the ground of the first quartz filter A1, the second quartz filter A2, the 3rd quartz filter A3 and the 4th quartz filter A4.
In embodiments of the present invention, employing is in series by a plurality of quartz filters and vibrates stack, and a plurality of electric capacity parallel coupled have formed the wave-shape amplitude effect of regulating, and whole combination quartz filter reaches a high accuracy, narrow resistance band, high technique effect of decaying.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. combination quartz filter; It is characterized in that; Said combination quartz filter comprises the quartz filter more than three of serial connection successively; Said combination quartz filter also comprises the plural electric capacity of regulating the wave-shape amplitude effect that plays, said each capacitance series between the tie point and ground of two quartz filters, the ground end ground connection of said each quartz filter.
2. combination quartz filter as claimed in claim 1; It is characterized in that; Said combination quartz filter comprises first quartz filter, second quartz filter, the 3rd quartz filter, the 4th quartz filter, capacitor C 1, capacitor C 2 and capacitor C 3; Said first quartz filter, second quartz filter, the 3rd quartz filter and the 4th quartz filter are connected in series successively; Said capacitor C 1 is serially connected between the tie point and ground of first quartz filter and second quartz filter; Said capacitor C 2 is serially connected between the tie point and ground of second quartz filter and the 3rd quartz filter, and said capacitor C 3 is serially connected between the tie point and ground of the 3rd quartz filter and the 4th quartz filter, and equal ground connection is held on the ground of said first quartz filter, second quartz filter, the 3rd quartz filter and the 4th quartz filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102796737A CN102403984A (en) | 2010-09-13 | 2010-09-13 | Combined quartz filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102796737A CN102403984A (en) | 2010-09-13 | 2010-09-13 | Combined quartz filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102403984A true CN102403984A (en) | 2012-04-04 |
Family
ID=45885842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102796737A Pending CN102403984A (en) | 2010-09-13 | 2010-09-13 | Combined quartz filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102403984A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474618A (en) * | 2020-05-20 | 2020-07-31 | 腾景科技股份有限公司 | Wide-band temperature tuning filter of air gap etalon structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418013A (en) * | 2001-11-01 | 2003-05-14 | 夏普公司 | Low-noise down converter to convert received signal into MF signal |
| CN1619952A (en) * | 2003-11-18 | 2005-05-25 | 电子科技大学 | Design of cross coupling in filter and its preparation method |
-
2010
- 2010-09-13 CN CN2010102796737A patent/CN102403984A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418013A (en) * | 2001-11-01 | 2003-05-14 | 夏普公司 | Low-noise down converter to convert received signal into MF signal |
| CN1619952A (en) * | 2003-11-18 | 2005-05-25 | 电子科技大学 | Design of cross coupling in filter and its preparation method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474618A (en) * | 2020-05-20 | 2020-07-31 | 腾景科技股份有限公司 | Wide-band temperature tuning filter of air gap etalon structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120404 |