CN103684329A - Highly-stable filter device - Google Patents
Highly-stable filter device Download PDFInfo
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- CN103684329A CN103684329A CN201310613391.XA CN201310613391A CN103684329A CN 103684329 A CN103684329 A CN 103684329A CN 201310613391 A CN201310613391 A CN 201310613391A CN 103684329 A CN103684329 A CN 103684329A
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Abstract
The invention discloses a highly-stable filter device which comprises a transformer A, an inductor L1, a bridge rectifying diode D, a capacitor C1, a capacitor C2 and a resistor R1. The bridge rectifying diode D comprises a diode D1, a diode D2, a diode D3 and a diode D3 which are sequentially connected to form a closed loop, wherein the diode D1 is connected with the input end of the diode D4, and the diode D2 is connected with the output end of the diode D3. Two ends of the transformer A are respectively connected with a signal input end Vi and the bridge rectifying diode D. The common terminal of the diode D1 and the diode D4 is connected with the resistor R1 and the capacitor C2. The common terminal of the diode D2 and the diode D3 is connected with the inductor L1 which is connected with the resistor R1 and the capacitor C1. The capacitor C1 and the capacitor C2 are grounded. Two ends of the resistor R1 are further connected with a signal output end V0. By the arrangement adding the bridge rectifying diode, inductor filtering and capacitor filter are performed sequentially, good filtering can be achieved at any time, and stable filtering performance can be achieved.
Description
Technical field
The present invention relates to microwave communication field, be specifically related to high stability filter.
Background technology
Jamming incoherent signal is eliminated in filtering exactly, filters and obtain pure direct current by inputing or outputing.The circuit that frequency beyond the frequency of characteristic frequency or this frequency is carried out to effective filtering is exactly filter, and its function obtains exactly a characteristic frequency or eliminates a characteristic frequency.In microwave communication field, often need to filter the electromagnetic wave of transmission, retain the electromagnetic wave of specific wavelength, in this process, also need to use filter circuit.In the communications field, often need to carry out filtering to the ripple of different frequency range, certainly also comprise the ripple of some high bands of filtering.The in the situation that of large electric current, due to load resistance, R is very little, conventionally need to use inductor filter, but the simple inductor filter that adopts exists the stable not defect of performance within the scope of full temperature, causes the at a time not good situation of filter effect to occur.The in the situation that of large electric current, if adopt merely capacitor filtering, capacitance certainly will be very large, and the impulse current of commutation capacitor is also very large, easily damages device, causes filtering not good.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, and high stability filter is provided, and by adding bridge rectifier diode, first by inductor filter, and then is capacitor filtering, guarantees that any time can realize filtering preferably, and filtering performance is more stable.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: high stability filter, comprise transformer A, inductance L 1, bridge rectifier diode D, capacitor C 1, capacitor C 2 and resistance R 1, described bridge rectifier diode D comprises diode D1, diode D2, diode D3 and the diode D4 that connects to form successively closed-loop path, diode D1 is wherein connected with the input of diode D4, and diode D2 is connected with the output of diode D3; Described transformer A two ends connect respectively signal input part Vi and bridge rectifier diode D; Described diode D1 and the common port of diode D4 be contact resistance R1 and capacitor C 2 simultaneously; Described diode D2 is connected inductance L 1 with the common port of diode D3, and inductance L 1 is gone back contact resistance R1 and capacitor C 1; Described capacitor C 1 and the equal ground connection of capacitor C 2; Described resistance R 1 two ends are also connected with signal output part V0.Adopt inductance L 1 filtering, when input voltage increases, the electric current in the inductance L 1 of connecting with load R1 increases, therefore inductance L 1, by storage area magnetic field energy, when electric current reduces, discharges energy again, load R1 electric current is become smoothly, reach the effect of filtering.Therefore because inductance is little to the impedance of direct current, the impedance of interchange is large, can access good filter effect and DC-flow is little.In output flying capcitor C1 and the capacitor C 2 of resistance R 1, play the effect of filtering again, thereby can obtain more mild current/voltage simultaneously.Frequency is larger, and inductance is larger, and filter effect is better, is very suitable for the filtering of high frequency occasion.
The size of described capacitor C 1 and the equal and opposite in direction of capacitor C 2.Better realize the filtering to circuit.
The output of described diode D1 is connected with the input of diode D2.
The input of described diode D3 is connected with the output of diode D4.
Compared with prior art, the invention has the beneficial effects as follows: first by bridge rectifier diode, the electric current at transformer two ends is carried out to rectification, then by inductance L 1 filtering, make the electric current at load R1 two ends become level and smooth, in addition when inductor filter temperature influence is unstable, at the electric capacity of resistance R 1 output cross-over connection, can play the effect of filtering again, thereby can obtain more mild current/voltage, filtering performance is more stable.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited to this.
Embodiment:
As shown in Figure 1, the present invention includes transformer A, inductance L 1, bridge rectifier diode D, capacitor C 1, capacitor C 2 and resistance R 1.The bridge rectifier diode D of the present embodiment comprises diode D1, diode D2, diode D3 and the diode D4 that connects to form successively closed-loop path, diode D1 is wherein connected with the input of diode D4, diode D2 is connected with the output of diode D3, the output of diode D1 is connected with the input of diode D2, and the input of diode D3 is connected with the output of diode D4.The transformer A two ends of the present embodiment connect respectively signal input part Vi and bridge rectifier diode D.The diode D1 of the present embodiment and the common port of diode D4 be contact resistance R1 and capacitor C 2 simultaneously, and the common port of diode D2 and diode D3 is connected inductance L 1, and inductance L 1 is gone back contact resistance R1 and capacitor C 1, capacitor C 1 and the equal ground connection of capacitor C 2; Described resistance R 1 two ends are also connected with signal output part V0.The size of the capacitor C 1 of the present embodiment and the equal and opposite in direction of capacitor C 2.
Adopt inductance L 1 filtering, when input voltage increases, the electric current in the inductance L 1 of connecting with load R1 increases, therefore inductance L 1, by storage area magnetic field energy, when electric current reduces, discharges energy again, load R1 electric current is become smoothly, reach the effect of filtering.Therefore because inductance is little to the impedance of direct current, the impedance of interchange is large, can access good filter effect and DC-flow is little.In output flying capcitor C1 and the capacitor C 2 of resistance R 1, play the effect of filtering again, thereby can obtain more mild current/voltage simultaneously.Frequency is larger, and inductance is larger, and filter effect is better, is very suitable for the filtering of high frequency occasion.
Just can realize this invention as mentioned above.
Claims (4)
1. high stability filter, it is characterized in that: comprise transformer A, inductance L 1, bridge rectifier diode D, capacitor C 1, capacitor C 2 and resistance R 1, described bridge rectifier diode D comprises diode D1, diode D2, diode D3 and the diode D4 that connects to form successively closed-loop path, diode D1 is wherein connected with the input of diode D4, and diode D2 is connected with the output of diode D3; Described transformer A two ends connect respectively signal input part Vi and bridge rectifier diode D; Described diode D1 and the common port of diode D4 be contact resistance R1 and capacitor C 2 simultaneously; Described diode D2 is connected inductance L 1 with the common port of diode D3, and inductance L 1 is gone back contact resistance R1 and capacitor C 1; Described capacitor C 1 and the equal ground connection of capacitor C 2; Described resistance R 1 two ends are also connected with signal output part V0.
2. high stability filter according to claim 1, is characterized in that: the size of described capacitor C 1 and the equal and opposite in direction of capacitor C 2.
3. high stability filter according to claim 1, is characterized in that: the output of described diode D1 is connected with the input of diode D2.
4. high stability filter according to claim 1, is characterized in that: the input of described diode D3 is connected with the output of diode D4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613391.XA CN103684329A (en) | 2013-11-28 | 2013-11-28 | Highly-stable filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613391.XA CN103684329A (en) | 2013-11-28 | 2013-11-28 | Highly-stable filter device |
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| Publication Number | Publication Date |
|---|---|
| CN103684329A true CN103684329A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310613391.XA Pending CN103684329A (en) | 2013-11-28 | 2013-11-28 | Highly-stable filter device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352763Y (en) * | 2009-01-05 | 2009-11-25 | 西安理工大学 | Phase-shifted full bridge zero-current and zero-voltage PWM converter |
| CN202103589U (en) * | 2011-05-10 | 2012-01-04 | 深圳三马电器有限公司 | Power conversion device |
| CN202586461U (en) * | 2012-04-01 | 2012-12-05 | 绥化电业局 | Portable charger |
| CN202798505U (en) * | 2012-09-13 | 2013-03-13 | 郑州单点科技软件有限公司 | Bridge rectifier filter circuit |
-
2013
- 2013-11-28 CN CN201310613391.XA patent/CN103684329A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352763Y (en) * | 2009-01-05 | 2009-11-25 | 西安理工大学 | Phase-shifted full bridge zero-current and zero-voltage PWM converter |
| CN202103589U (en) * | 2011-05-10 | 2012-01-04 | 深圳三马电器有限公司 | Power conversion device |
| CN202586461U (en) * | 2012-04-01 | 2012-12-05 | 绥化电业局 | Portable charger |
| CN202798505U (en) * | 2012-09-13 | 2013-03-13 | 郑州单点科技软件有限公司 | Bridge rectifier filter circuit |
Non-Patent Citations (1)
| Title |
|---|
| 张先永等: "《电子技术基础》", 31 January 2009, 华中科技大学出版社 * |
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Application publication date: 20140326 |