CN102332473A - Low-voltage drop active diode - Google Patents
Low-voltage drop active diode Download PDFInfo
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- CN102332473A CN102332473A CN201110278707A CN201110278707A CN102332473A CN 102332473 A CN102332473 A CN 102332473A CN 201110278707 A CN201110278707 A CN 201110278707A CN 201110278707 A CN201110278707 A CN 201110278707A CN 102332473 A CN102332473 A CN 102332473A
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Abstract
The application discloses a low-voltage drop active diode, which carries out the unilateral conduction function of the diode by controlling a high-speed electronic switch to switch on under forward voltage and switch off under backward voltage. Since the behavior of the high-speed electronic switch needs to be controlled, the unilateral conduction function of the high-speed electronic switch needs to be carried out by means of an internal power supply mode or an external isolated power supply mode. The external power supply is favorable for weak signal detection rather than the miniaturization of a device; and the internal power supply is limited to rectification and the like which can enable the active diode to absorb enough working power, is low in cost, and is favorable for the miniaturization of the device. The scheme in the application can realize low forward break-over voltage drop, low detection loss under the application of weak signal detection or extremely low voltage drop and power consumption under the application of rectification.
Description
Technical field
The application relates to the source diode that has in a kind of electronic applications.
Background technology
The application surface of diode is extremely wide now, but diode has the pressure drop of conducting, under the occasion of big electric current; The loss that conduction voltage drop brings is bigger; The consideration heat dissipation that device is necessary and increase radiator and temperature detection, the volume of equipment is unable to come down, and cost also increases much.And in the occasion of little electric current detection, the non-linear meeting of conduction voltage drop brings influence to signal shape.Therefore reduce the forward voltage drop loss under the small-signal applications scene, the power dissipation that reduces under the big electric current application scenarios is a problem that needs solution during diode uses.
The application proposes a kind of very desirable diode, and its unidirectional conduction voltage drop is very low, under the situation of little electric current, can approach 0V; Under the situation of big electric current, also can select to control its unidirectional conduction voltage drop, thereby solve the problem of power consumption through suitable high speed electronic switch device at high speed diode less than commercialization.
Summary of the invention
Constitute the application's the current path that source diode is arranged with high speed electronic switch,, end when reverse, promptly constitute the application's the source diode that has through the conducting when the forward of additional control circuit control high speed electronic switch.Since need be to the additional control circuit power supply of electronic switch, therefore this diode is active, need be extra for it provides operating current, but its operating current is very little.
Common various FETs meet the characteristic of high speed electronic switch, but under the situation of big electric current, will use special FET, if with electric current specific (special) requirements is arranged to withstand voltage, also need select other device that satisfies characteristic such as triode, IGBT etc.On behalf of present patent application, this just define must to use FET or triode, IGBT, as long as can all can be adopted by the application's scheme as the electronic device of speed-sensitive switch.
Utilizing under the situation of external power supply, the application is additional control circuit power supply through external power supply being isolated the back, the mode that the mode of isolation can use concussion pulse transformer transformation to isolate, but transformer can hinder the microminiaturized effort of device.
Can provide at application scenarios under the situation of enough energy, in the rectification purposes, it is additional control circuit power supply that the energy that the application can utilize reverse current or forward voltage to extract comes.
Description of drawings
Fig. 1 is to use the schematic diagram that source diode is arranged of external power supply.
Fig. 2 is to use the schematic diagram that source diode is arranged of self-supporting energy.
As shown in Figure 1, the application has a source diode scheme, through external power supply is isolated with voltage stabilizing after to there being source diode internal controller spare to supply power.When detecting forward voltage, internal components drives the high speed electronic switch conducting; When detecting less than forward voltage, driving high speed electronic switch closes.Therefore the application externally is equivalent to the high speed diode of an external power supply power supply.Fig. 1 has source diode need add external power supply and isolates, and the method for isolation can adopt pulse transformer to carry out rectification again after the AC/DC conversion; But this programme can be worked under very weak voltage and current signal, is particularly suitable for conventional diode operation and under the situation of the little electric current of low-voltage, uses, like purposes such as detection, logic determines.If application scenarios perhaps can not provide the scheme of following Fig. 2 that enough energy are provided to reverse current is responsive, also can use the scheme of Fig. 1 always.
As shown in Figure 2, the application other a kind of has the source diode scheme, and its process that drives high speed electronic switch is consistent with process shown in Figure 1, driving high speed electronic switch conducting when promptly internal components detects forward voltage; When detecting less than forward voltage, driving high speed electronic switch closes.But its required energy of environment extraction work from work comes to be the internal components power supply, can be the same in the encapsulation with general-purpose diode, and also can external only a few components and parts such as electric capacity etc.But because forward voltage drop is very low during operate as normal, need utilize the residing reverse impulse of diode that energy is provided, so it is suitable for the application scenarios of AC rectification, especially uses under the operative scenario of some high frequencies, big electric current.If application scenarios can not provide enough reverse voltage and reverse currents (energy of its need of work promptly can not be provided by reverse voltage) down; The source diode that has of this programme may improve the energy that forward voltage drop is drawn forward voltage in short-term; Cause its forward voltage drop meeting momentary fluctuation, this also allows under the asymmetric rectification application scenarios of alternating voltage waveform; When enough reverse voltages and electric current were arranged, the situation that has source diode to have reverse leakage current of this programme existed, so the scheme of this figure is not suitable for detection or logic judging circuit.The scheme of this figure is not owing to need provide insulating power supply, so cost is lower than Fig. 1 scheme, and it is very little that device volume also can be done.
The application's useful consequence is; Forward conduction through control high speed electronic switch in seedbed is arranged realizes that the application's the source diode that has is lower than conventional diode, conventional high speed diode forward voltage drop, can realize the target of low-power consumption rectification under zero loss detection of weak signal, the big electric current.
Claims (3)
1. a low pressure drop has source diode, it is characterized in that, constitutes the application's the current path that source diode is arranged with high speed electronic switch, through the conducting when the forward of additional control circuit control high speed electronic switch, when reverse by constituting source diode.
2. a kind of low pressure drop as claimed in claim 1 has source diode, it is characterized in that, is utilizing under the situation of external power supply, and the application is the additional control circuit power supply among the application through external power supply being isolated the back.
3. a kind of low pressure drop as claimed in claim 1 has source diode; It is characterized in that; Can provide at application scenarios under the situation of enough energy, it is the additional control circuit power supply among the application that the energy that the application can utilize reverse current or forward voltage to extract comes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278707A CN102332473A (en) | 2011-09-20 | 2011-09-20 | Low-voltage drop active diode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278707A CN102332473A (en) | 2011-09-20 | 2011-09-20 | Low-voltage drop active diode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102332473A true CN102332473A (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110278707A Pending CN102332473A (en) | 2011-09-20 | 2011-09-20 | Low-voltage drop active diode |
Country Status (1)
| Country | Link |
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| CN (1) | CN102332473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006983A (en) * | 2015-08-04 | 2015-10-28 | 重庆大学 | Rectifier circuit for piezoelectric energy collectors |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417164A (en) * | 1981-06-18 | 1983-11-22 | Southern Gas Association | Mechanical valve analog |
| US5506527A (en) * | 1994-04-15 | 1996-04-09 | Hewlett-Packard Compnay | Low power diode |
| CN1255239A (en) * | 1997-01-23 | 2000-05-31 | 流明诺斯因坦特公司 | Semiconductor diodes having low forward conduction voltage drop and low reverse current leakage |
| US6469564B1 (en) * | 1998-04-14 | 2002-10-22 | Minebea Co., Ltd. | Circuit simulating a diode |
| CN2550212Y (en) * | 2002-05-27 | 2003-05-14 | 臧育强 | Light state display |
| CN1846185A (en) * | 2003-09-08 | 2006-10-11 | 斯盖沃克斯瑟路申斯公司 | Quiescent current control circuit for high-power amplifiers |
| CN202259313U (en) * | 2011-09-20 | 2012-05-30 | 彭艳兵 | Active diode with low voltage drop |
-
2011
- 2011-09-20 CN CN201110278707A patent/CN102332473A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417164A (en) * | 1981-06-18 | 1983-11-22 | Southern Gas Association | Mechanical valve analog |
| US5506527A (en) * | 1994-04-15 | 1996-04-09 | Hewlett-Packard Compnay | Low power diode |
| CN1255239A (en) * | 1997-01-23 | 2000-05-31 | 流明诺斯因坦特公司 | Semiconductor diodes having low forward conduction voltage drop and low reverse current leakage |
| US6469564B1 (en) * | 1998-04-14 | 2002-10-22 | Minebea Co., Ltd. | Circuit simulating a diode |
| CN1436401A (en) * | 2000-05-09 | 2003-08-13 | 美蓓亚株式会社 | Circuit stimulating diode |
| CN2550212Y (en) * | 2002-05-27 | 2003-05-14 | 臧育强 | Light state display |
| CN1846185A (en) * | 2003-09-08 | 2006-10-11 | 斯盖沃克斯瑟路申斯公司 | Quiescent current control circuit for high-power amplifiers |
| CN202259313U (en) * | 2011-09-20 | 2012-05-30 | 彭艳兵 | Active diode with low voltage drop |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105006983A (en) * | 2015-08-04 | 2015-10-28 | 重庆大学 | Rectifier circuit for piezoelectric energy collectors |
| CN105006983B (en) * | 2015-08-04 | 2019-04-02 | 重庆大学 | A kind of rectification circuit for piezoelectric energy collector |
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Application publication date: 20120125 |