CN204068895U - For the active filter of mobile phone - Google Patents
For the active filter of mobile phone Download PDFInfo
- Publication number
- CN204068895U CN204068895U CN201420513035.0U CN201420513035U CN204068895U CN 204068895 U CN204068895 U CN 204068895U CN 201420513035 U CN201420513035 U CN 201420513035U CN 204068895 U CN204068895 U CN 204068895U
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- resistance
- amplifier
- electric capacity
- mobile phone
- output
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- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a kind of active filter for mobile phone, comprise the first amplifier to the 4th amplifier, first resistance is to the 8th resistance, first electric capacity and the second electric capacity, signal input part is connected with the first end of described first resistance, second end of described first resistance respectively with the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th resistance is connected with the inverting input of described first amplifier, the in-phase input end ground connection of described first amplifier, the output of described first amplifier respectively with the second end of described 3rd resistance, the first end of described 5th resistance is connected with secondary signal output, second end of described second resistance is connected with the first end of described 7th resistance and the output of described 4th amplifier respectively.The utility model is a kind of active filter for mobile phone, solves the problem that power consumption is comparatively large and operating state is stable not that traditional mobile phone filter also exists, has the value promoted the use of.
Description
Technical field
The utility model relates to a kind of filter, particularly relates to a kind of active filter for mobile phone.
Background technology
Filter is a kind of important composition device in mobile phone, and along with the development of electronic market, filter is also more and more by widespread production and use, and filter is mainly divided into active filter and passive filter.Main Function allows useful signal is zero-decrement as far as possible to be passed through, the reflection large as far as possible to unwanted signal.Filter generally has two ports, input signal, an output signal, utilizes this characteristic to be made an uproar ripple by a square wave group of filter or compound by gating, and obtains the sine wave of a characteristic frequency.The function of filter is exactly allow the signal of a certain component frequency to pass through smoothly, and the signal of other a part of frequency is then subject to larger suppression, and it is in fact a frequency selection circuit.In filter, the frequency range that signal can pass through, be called passband or passband; Otherwise signal is subject to very high attenuation or complete repressed frequency range is called stopband; Boundary frequency between passband and stopband is called cut-off frequency; The voltage gain of ideal filter in passband is constant, and the voltage gain in stopband is zero; The transition band of certain frequency scope is there is between the passband of practical filter and stopband.The problem that power dissipation ratio is comparatively large and operating state is stable is not there is for the conventional filter in mobile phone.
Utility model content
The purpose of this utility model is just to provide a kind of active filter for mobile phone to solve the problem.
In order to achieve the above object, the utility model have employed following technical scheme:
A kind of active filter for mobile phone, comprise the first amplifier to the 4th amplifier, first resistance is to the 8th resistance, first electric capacity and the second electric capacity, signal input part is connected with the first end of described first resistance, second end of described first resistance respectively with the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th resistance is connected with the inverting input of described first amplifier, the in-phase input end ground connection of described first amplifier, the output of described first amplifier respectively with the second end of described 3rd resistance, the first end of described 5th resistance is connected with secondary signal output, second end of described second resistance is connected with the first end of described 7th resistance and the output of described 4th amplifier respectively, the in-phase input end ground connection of described 4th amplifier, the inverting input of described 4th amplifier is connected with the second end of described 7th resistance and the first end of described 8th resistance respectively, second end of described 8th resistance respectively with the first end of described first electric capacity, the first end of described 6th resistance, the output of described second amplifier is connected with voltage input end, the inverting input of described second amplifier is connected with the second end of described 5th resistance and the second end of described first electric capacity respectively, the in-phase input end ground connection of described second amplifier, second end of described 6th resistance is connected with the first end of described second electric capacity and the inverting input of described 3rd amplifier respectively, the in-phase input end ground connection of described 3rd amplifier, the output of described 3rd amplifier respectively with the second end of described 4th resistance, second end of described second electric capacity is connected with the first signal output part.
The beneficial effects of the utility model are:
The utility model is a kind of active filter for mobile phone, solves the problem that power consumption is comparatively large and operating state is stable not that traditional mobile phone filter also exists, has the value promoted the use of.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of active filter for mobile phone of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, the utility model is a kind of active filter for mobile phone, comprise the first amplifier A1 to the 4th amplifier A4, first resistance R1 is to the 8th resistance R8, first electric capacity C1 and the second electric capacity C2, signal input part is connected with the first end of the first resistance R1, second end of the first resistance R1 respectively with the first end of the second resistance R2, the first end of the 3rd resistance R3, the first end of the 4th resistance R4 is connected with the inverting input of the first amplifier A1, the in-phase input end ground connection of the first amplifier A1, the output of the first amplifier A1 respectively with second end of the 3rd resistance R3, the first end of the 5th resistance R5 is connected with secondary signal output, second end of the second resistance R2 is connected with the first end of the 7th resistance R7 and the output of the 4th amplifier A4 respectively, the in-phase input end ground connection of the 4th amplifier A4, the inverting input of the 4th amplifier A4 is connected with second end of the 7th resistance R7 and the first end of the 8th resistance R8 respectively, second end of the 8th resistance R8 respectively with the first end of the first electric capacity C1, the first end of the 6th resistance R6, the output of the second amplifier A2 is connected with voltage input end, the inverting input of the second amplifier A2 is connected with second end of the 5th resistance R5 and second end of the first electric capacity C1 respectively, the in-phase input end ground connection of the second amplifier A2, second end of the 6th resistance R6 is connected with the first end of the second electric capacity C2 and the inverting input of the 3rd amplifier A3 respectively, the in-phase input end ground connection of the 3rd amplifier A3, the output of the 3rd amplifier A3 respectively with second end of the 4th resistance R4, second end of the second electric capacity C2 is connected with the first signal output part.
Claims (1)
1. the active filter for mobile phone, it is characterized in that: comprise the first amplifier to the 4th amplifier, first resistance is to the 8th resistance, first electric capacity and the second electric capacity, signal input part is connected with the first end of described first resistance, second end of described first resistance respectively with the first end of described second resistance, the first end of described 3rd resistance, the first end of described 4th resistance is connected with the inverting input of described first amplifier, the in-phase input end ground connection of described first amplifier, the output of described first amplifier respectively with the second end of described 3rd resistance, the first end of described 5th resistance is connected with secondary signal output, second end of described second resistance is connected with the first end of described 7th resistance and the output of described 4th amplifier respectively, the in-phase input end ground connection of described 4th amplifier, the inverting input of described 4th amplifier is connected with the second end of described 7th resistance and the first end of described 8th resistance respectively, second end of described 8th resistance respectively with the first end of described first electric capacity, the first end of described 6th resistance, the output of described second amplifier is connected with voltage input end, the inverting input of described second amplifier is connected with the second end of described 5th resistance and the second end of described first electric capacity respectively, the in-phase input end ground connection of described second amplifier, second end of described 6th resistance is connected with the first end of described second electric capacity and the inverting input of described 3rd amplifier respectively, the in-phase input end ground connection of described 3rd amplifier, the output of described 3rd amplifier respectively with the second end of described 4th resistance, second end of described second electric capacity is connected with the first signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513035.0U CN204068895U (en) | 2014-09-04 | 2014-09-04 | For the active filter of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420513035.0U CN204068895U (en) | 2014-09-04 | 2014-09-04 | For the active filter of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204068895U true CN204068895U (en) | 2014-12-31 |
Family
ID=52210335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420513035.0U Expired - Fee Related CN204068895U (en) | 2014-09-04 | 2014-09-04 | For the active filter of mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204068895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270159A (en) * | 2014-09-04 | 2015-01-07 | 高巍 | Active power filter for mobile phone |
-
2014
- 2014-09-04 CN CN201420513035.0U patent/CN204068895U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270159A (en) * | 2014-09-04 | 2015-01-07 | 高巍 | Active power filter for mobile phone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160623 Address after: 401336 factory building, No. 3-4, Jiangqiao Road, Nan'an District, Chongqing, 6 Patentee after: Chongqing Li Feng Technology Co., Ltd. Address before: 056000 Handan Development Zone, Hebei, Century Avenue, No. 4, layer 2, layer Patentee before: Gao Wei |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20190904 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |