CN105071782A - Variable-bandwidth filter chip - Google Patents
Variable-bandwidth filter chip Download PDFInfo
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- CN105071782A CN105071782A CN201510450045.3A CN201510450045A CN105071782A CN 105071782 A CN105071782 A CN 105071782A CN 201510450045 A CN201510450045 A CN 201510450045A CN 105071782 A CN105071782 A CN 105071782A
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- bandwidth
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- bandwidth filter
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Abstract
The invention relates to the technical field of filters, and specifically relates to a variable-bandwidth filter chip. The packaging cost and requirement can be lowered, the complexity of a printed circuit board can be simplified, and the reliability can be improved. The variable-bandwidth filter chip comprises a variable-bandwidth filter and a bandwidth selection module which are integrated inside a chip body, wherein the variable-bandwidth filter is connected with the bandwidth selection module, the variable-bandwidth filter is connected with an input pin and an output pin of the chip body, the bandwidth selection module is connected with a control signal pin of the chip body, and the control signal pin inputs a control signal to realize bandwidth selection.
Description
Technical field
The present invention relates to wave filter technology field, be specially a kind of variable bandwidth filter chip.
Background technology
In the application of traditional variable bandwidth filter, the filter of different bandwidth exists with the form of discrete filters, and the form of bandwidth selection module discrete device equally is present in system.For two kinds of bandwidth tunable filters, as Fig. 1, the variable bandwidth filter that traditional discrete device exists, the package pins of filter is minimum is 6 pins, adds the cost of encapsulation, simultaneously, because filter and bandwidth selection module are all discrete devices, therefore too increase complexity and the cost of printed circuit board (PCB), if the quantity of bandwidth varying increases, corresponding cost can increase more obvious.In the prior art, if will change the corner frequency of filter, common way is the switching realizing between different frequency filter with two even more filters, and this way can increase power consumption and the area cost of filter greatly.
Summary of the invention
In order to solve the problem, the invention provides a kind of variable bandwidth filter chip, it can reduce packaging cost and requirement, simplifies printed circuit board (PCB) complexity, improves reliability.
Its technical scheme is such: a kind of variable bandwidth filter chip, it is characterized in that, it comprises the BREATHABLE BANDWIDTH filter and bandwidth selection module that are integrated in chip body inside, described BREATHABLE BANDWIDTH filter connects described bandwidth selection module, described BREATHABLE BANDWIDTH filter connects input pin and the output pin of described chip body, chip body control signal pin described in described bandwidth selection model calling, described control signal pin input control signal realizes bandwidth selection.
It is further characterized in that, the packing forms of described chip body is at least five pin package forms;
Described control signal number of pins is identical with the figure place of the bit of described control signal.
New School of the present invention is adopted to roar, traditional function i ntegration realizing variable bandwidth filter with discrete device to an independent chip internal, greatly reduce cost and the requirement of encapsulation, also simplify the complexity of printed circuit board (PCB), the cost reducing manufacturer improves reliability simultaneously simultaneously.
Accompanying drawing explanation
Fig. 1 is prior art schematic diagram;
Fig. 2 is schematic diagram of the present invention.
Embodiment
As shown in Figure 2, a kind of variable bandwidth filter chip, it comprises the BREATHABLE BANDWIDTH filter 1 and bandwidth selection module 2 that are integrated in chip body 3 inside, BREATHABLE BANDWIDTH filter 1 connects bandwidth selection module 2, BREATHABLE BANDWIDTH filter 1 connects input pin IN and the output pin OUT of chip body 3, bandwidth selection module 2 connects the control signal pin C of chip body 3, control signal pin C input control signal realizes bandwidth selection, chip body comprises power pin VDD and ground pin GND in addition.The packing forms of chip body 3 is at least five pin package forms, when chip body 3 only has two kinds of bandwidth selections, control signal pin C only includes one, namely control signal is a bit, 0 (low level) or 1 (high level) can be selected, now package pins is minimum is five pin package forms, when chip body 3 has two or more bandwidth selection, control signal is two or more bit, the now corresponding increase of control signal number of pins, the packing forms of chip body 3 is more than five pin package forms, control signal number of pins is identical with the figure place of the bit of control signal, more bandwidth selection requirement is realized by the number of bits adjusting control signal.
In the present invention, bandwidth selection module 2 is the bandwidth selection information transmission of outside to variable bandwidth filter 1, and variable bandwidth filter 1 changes the bandwidth of filters internal according to bandwidth selection information.
Claims (3)
1. a variable bandwidth filter chip, it is characterized in that, it comprises the BREATHABLE BANDWIDTH filter and bandwidth selection module that are integrated in chip body inside, described BREATHABLE BANDWIDTH filter connects described bandwidth selection module, described BREATHABLE BANDWIDTH filter connects input pin and the output pin of described chip body, chip body control signal pin described in described bandwidth selection model calling, described control signal pin input control signal realizes bandwidth selection.
2. a kind of variable bandwidth filter chip according to claim 1, is characterized in that, the packing forms of described chip body is at least five pin package forms.
3. a kind of variable bandwidth filter chip according to claim 1, is characterized in that, described control signal number of pins is identical with the figure place of the bit of described control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450045.3A CN105071782A (en) | 2015-07-29 | 2015-07-29 | Variable-bandwidth filter chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510450045.3A CN105071782A (en) | 2015-07-29 | 2015-07-29 | Variable-bandwidth filter chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105071782A true CN105071782A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510450045.3A Pending CN105071782A (en) | 2015-07-29 | 2015-07-29 | Variable-bandwidth filter chip |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277510A (en) * | 2007-03-30 | 2008-10-01 | 展讯通信（上海）有限公司 | Method and apparatus for wireless orientation based on mobile phone travelling speed |
| CN102353957A (en) * | 2011-09-15 | 2012-02-15 | 哈尔滨工程大学 | Method for processing multi-beam bathymetric data based on variable-bandwidth filter |
| US20130343547A1 (en) * | 2012-06-26 | 2013-12-26 | Ashwini Pahuja | Adaptive Bandwidth Management of IBOC Audio Signals During Blending |
| CN204810240U (en) * | 2015-07-29 | 2015-11-25 | 无锡思泰迪半导体有限公司 | Variable bandwidth filter chip |
-
2015
- 2015-07-29 CN CN201510450045.3A patent/CN105071782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277510A (en) * | 2007-03-30 | 2008-10-01 | 展讯通信（上海）有限公司 | Method and apparatus for wireless orientation based on mobile phone travelling speed |
| CN102353957A (en) * | 2011-09-15 | 2012-02-15 | 哈尔滨工程大学 | Method for processing multi-beam bathymetric data based on variable-bandwidth filter |
| US20130343547A1 (en) * | 2012-06-26 | 2013-12-26 | Ashwini Pahuja | Adaptive Bandwidth Management of IBOC Audio Signals During Blending |
| CN204810240U (en) * | 2015-07-29 | 2015-11-25 | 无锡思泰迪半导体有限公司 | Variable bandwidth filter chip |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |