CN103683991A - Power supply circuit stable in power supply - Google Patents
Power supply circuit stable in power supply Download PDFInfo
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- CN103683991A CN103683991A CN201310612416.4A CN201310612416A CN103683991A CN 103683991 A CN103683991 A CN 103683991A CN 201310612416 A CN201310612416 A CN 201310612416A CN 103683991 A CN103683991 A CN 103683991A
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Abstract
The invention discloses as power supply device stable in power supply. The power supply circuit comprises four MOS (metal oxide semiconductor) tubes, a rectifier tube D, an inductor L, a capacitor C1 and a capacitor C2. The inductor L, the drain of the MOS tube N1, the source of the MOS tube N1, the drain of the MOS tube N2 and the source of the MOS tube N2 are sequentially serially connected to form a closed loop. Two ends of the inductor L are respectively connected with the grid of the MOS tube N1 and grid of the MOS tube N2. The rectifier tube D is parallelly connected between the drain of the MOS tube N1 and the source of the MOS tube N2. The capacitor C1, the drain of the MOS tube N3 and the source of the MOS tube N3 are sequentially serially connected to form a closed loop. The grid of the MOS tube N3 is connected with the source of the MOS tube N4. The drain of the MOS tube N4 is connected with the drain of the MOS tube N3. The common terminal of the capacitor C1 and the MOS tube N3 is connected with the rectifier tube D. The capacitor C2 is connected between the rectifier tube D and a grounding end. By the arrangement that the special power supply circuit is designed to guarantee stable power supply, electronic tags are stable and easy to identify during radio frequency identification.
Description
Technical field
The present invention relates to field of radio frequency identification, be specifically related to the stable power circuit of powering.
Background technology
In recent years, along with wireless communication technology, the development of microelectric technique, non-contact IC card technique is flourish, and in various fields, has obtained universal and popularization rapidly, as public transport automatic ticket-selling system, residential identity card, phonecard, bank card etc.Wherein conventional a kind of technology is exactly RFID, i.e. radio-frequency (RF) identification.RFID is often called induction type electronic wafer or closely connects card, contactless card, non-contact card, electronic tag, electronic bar code, etc.A set of complete rfid system is comprised of Reader and Transponder two parts, its operating principle is for the unlimited electric wave energy of launching a characteristic frequency by Reader is to Transponder, in order to drive Transponder circuit that the ID Code of Inner portion is sent, now Reader just receives this ID Code.Therefore Transponder special be to exempt from by battery, contact-free, exempt to swipe the card that it is dirty not to be afraid of, and wafer password to be that the world is unique cannot copy, safe, the long-life.The application of RFID is very extensive, and typical case's application at present has animal wafer, automobile wafer Fang Pirates device, gate inhibition's control, parking lot control, production line automation, handling of goods and materials.Passive power supply technique is one of key technology of radio-frequency (RF) identification, mainly by electromagnetic induction principle and integrated stable voltage circuit, solves at present.When electronic tag enters reader magnetic field, by electromagnetic induction, from magnetic field, obtain energy, at the coil two ends of card, induce alternating current, after rectifying and voltage-stabilizing, can obtain direct voltage.And in existing voltage stabilizing circuit, also do not design special power circuit the stable of power supply of guaranteeing supply, cause electronic tag unstable in radio frequency identification process.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, provides power supply stable power circuit, designs special power circuit the stable of power supply of guaranteeing supply, and makes electronic tag more stable in radio frequency identification process, is easy to identification.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: the stable power circuit of powering, comprise metal-oxide-semiconductor N1, metal-oxide-semiconductor N2, metal-oxide-semiconductor N3, metal-oxide-semiconductor N4, rectifying tube D, inductance L, capacitor C 1 and capacitor C 2, between the source electrode of the drain electrode of the source electrode of the drain electrode of described inductance L, metal-oxide-semiconductor N1, metal-oxide-semiconductor N1, metal-oxide-semiconductor N2 and metal-oxide-semiconductor N2, be connected in series successively and form closed-loop path, the two ends of inductance L connect respectively the grid of metal-oxide-semiconductor N1 and the grid of metal-oxide-semiconductor N2, and rectifying tube D is connected in parallel between the drain electrode of metal-oxide-semiconductor N1 and the source electrode of metal-oxide-semiconductor N2; Between described capacitor C 1, the drain electrode of metal-oxide-semiconductor N3 and the source electrode of metal-oxide-semiconductor N3, be connected in series successively and form closed-loop path, the grid of metal-oxide-semiconductor N3 connects the source electrode of metal-oxide-semiconductor N4, the drain electrode of metal-oxide-semiconductor N4 connects the drain electrode of metal-oxide-semiconductor N3, the grid of metal-oxide-semiconductor N4 connects output a1, the source electrode of the grid of metal-oxide-semiconductor N3 and metal-oxide-semiconductor N4 is connected output a2, and the common port of capacitor C 1 and metal-oxide-semiconductor N3 is connected rectifying tube D; Described capacitor C 2 is connected between rectifying tube D and earth terminal.
Described rectifying tube D is connected power supply with the common port of capacitor C 2.
Described capacitor C 1 and the common end grounding of metal-oxide-semiconductor N3.
Described metal-oxide-semiconductor N1 and the common end grounding of metal-oxide-semiconductor N2.
Power circuit is by storage capacitor, and the rectifier that metal-oxide-semiconductor forms and switching circuit form.The inductance coil L arranging, induces alternating current by electromagnetic coupled, after rectification, at storage capacitor C2 end, produces direct voltage VDD.Pressure regulation capacitor C 1 forms the electric current that discharge loop makes front end and starts C1 charging and stop the charging to C2 after the conducting of N3 pipe, makes C2 both end voltage keep stable, is load circuit stable supply voltage is provided.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is at storage capacitor, and under the rectifier that metal-oxide-semiconductor forms and the acting in conjunction of switching circuit, stablizing of the power supply of guaranteeing supply, makes electronic tag more stable in radio frequency identification process, is easy to identification.
Accompanying drawing explanation
Fig. 1 is circuit diagram 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 1 figure, the present invention includes metal-oxide-semiconductor N1, metal-oxide-semiconductor N2, metal-oxide-semiconductor N3, metal-oxide-semiconductor N4, rectifying tube D, inductance L, capacitor C 1 and capacitor C 2.Between the source electrode of the drain electrode of the source electrode of the drain electrode of the inductance L of the present embodiment, metal-oxide-semiconductor N1, metal-oxide-semiconductor N1, metal-oxide-semiconductor N2 and metal-oxide-semiconductor N2, be connected in series successively and form closed-loop path, the two ends of inductance L connect respectively the grid of metal-oxide-semiconductor N1 and the grid of metal-oxide-semiconductor N2, the rectifying tube D that is connected in parallel between the drain electrode of metal-oxide-semiconductor N1 and the source electrode of metal-oxide-semiconductor N2, rectifying tube D is connected power supply with the common port of capacitor C 2.Between the capacitor C 1 of the present embodiment, the drain electrode of metal-oxide-semiconductor N3 and the source electrode of metal-oxide-semiconductor N3, be connected in series successively and form closed-loop path, the grid of metal-oxide-semiconductor N3 connects the source electrode of metal-oxide-semiconductor N4, the drain electrode of metal-oxide-semiconductor N4 connects the drain electrode of metal-oxide-semiconductor N3, the grid of metal-oxide-semiconductor N4 connects output a1, the source electrode of the grid of metal-oxide-semiconductor N3 and metal-oxide-semiconductor N4 is connected output a2, the common port of capacitor C 1 and metal-oxide-semiconductor N3 is connected rectifying tube D, the common end grounding of capacitor C 1 and metal-oxide-semiconductor N3, the common end grounding of metal-oxide-semiconductor N1 and metal-oxide-semiconductor N2.The capacitor C 2 of the present embodiment is connected between rectifying tube D and earth terminal.
Power circuit is by storage capacitor, and the rectifier that metal-oxide-semiconductor forms and switching circuit form.The inductance coil L arranging, induces alternating current by electromagnetic coupled, after rectification, at storage capacitor C2 end, produces direct voltage VDD.Pressure regulation capacitor C 1 forms the electric current that discharge loop makes front end and starts C1 charging and stop the charging to C2 after the conducting of N3 pipe, makes C2 both end voltage keep stable, is load circuit stable supply voltage is provided.At storage capacitor, under the rectifier that metal-oxide-semiconductor forms and the acting in conjunction of switching circuit, stablizing of the power supply of guaranteeing supply, makes electronic tag more stable in radio frequency identification process, is easy to identification.
Just can realize this invention as mentioned above.
Claims (4)
1. the stable power circuit of power supply, it is characterized in that: comprise metal-oxide-semiconductor N1, metal-oxide-semiconductor N2, metal-oxide-semiconductor N3, metal-oxide-semiconductor N4, rectifying tube D, inductance L, capacitor C 1 and capacitor C 2, between the source electrode of the drain electrode of the source electrode of the drain electrode of described inductance L, metal-oxide-semiconductor N1, metal-oxide-semiconductor N1, metal-oxide-semiconductor N2 and metal-oxide-semiconductor N2, be connected in series successively and form closed-loop path, the two ends of inductance L connect respectively the grid of metal-oxide-semiconductor N1 and the grid of metal-oxide-semiconductor N2, and rectifying tube D is connected in parallel between the drain electrode of metal-oxide-semiconductor N1 and the source electrode of metal-oxide-semiconductor N2; Between described capacitor C 1, the drain electrode of metal-oxide-semiconductor N3 and the source electrode of metal-oxide-semiconductor N3, be connected in series successively and form closed-loop path, the grid of metal-oxide-semiconductor N3 connects the source electrode of metal-oxide-semiconductor N4, the drain electrode of metal-oxide-semiconductor N4 connects the drain electrode of metal-oxide-semiconductor N3, the grid of metal-oxide-semiconductor N4 connects output a1, the source electrode of the grid of metal-oxide-semiconductor N3 and metal-oxide-semiconductor N4 is connected output a2, and the common port of capacitor C 1 and metal-oxide-semiconductor N3 is connected rectifying tube D; Described capacitor C 2 is connected between rectifying tube D and earth terminal.
2. the stable power circuit of power supply according to claim 1, is characterized in that: described rectifying tube D is connected power supply with the common port of capacitor C 2.
3. the stable power circuit of power supply according to claim 1, is characterized in that: described capacitor C 1 and the common end grounding of metal-oxide-semiconductor N3.
4. the stable power circuit of power supply according to claim 1, is characterized in that: described metal-oxide-semiconductor N1 and the common end grounding of metal-oxide-semiconductor N2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612416.4A CN103683991A (en) | 2013-11-28 | 2013-11-28 | Power supply circuit stable in power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612416.4A CN103683991A (en) | 2013-11-28 | 2013-11-28 | Power supply circuit stable in power supply |
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| CN103683991A true CN103683991A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310612416.4A Pending CN103683991A (en) | 2013-11-28 | 2013-11-28 | Power supply circuit stable in power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242702A (en) * | 2014-10-10 | 2014-12-24 | 苏州弘鹏新能源有限公司 | Busbar capacitance discharge protection circuit of photovoltaic inverter |
| CN108040199A (en) * | 2017-12-28 | 2018-05-15 | 广州爱易学智能信息科技有限公司 | Integrated audio/video harvester |
| CN108319188A (en) * | 2018-01-03 | 2018-07-24 | 广州爱易学智能信息科技有限公司 | Wisdom class board manages system |
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| CN1804855A (en) * | 2005-01-11 | 2006-07-19 | 盛群半导体股份有限公司 | Power supply processing interface in passive radio frequency identification system |
| US20070075147A1 (en) * | 2005-09-30 | 2007-04-05 | Stmicroelectronics Asia Pacific Pte. Ltd. | Circuits for preventing overvoltage conditions on antenna terminals and method |
| CN101989330A (en) * | 2009-08-07 | 2011-03-23 | 上海华虹Nec电子有限公司 | High-frequency radio frequency identification device (RFID) tag circuit and chip |
| CN102567767A (en) * | 2010-12-15 | 2012-07-11 | 上海华虹Nec电子有限公司 | Demodulator circuit of electronic tag of RFID (radio frequency identification) system |
| CN103199814A (en) * | 2012-01-06 | 2013-07-10 | 上海华虹集成电路有限责任公司 | Amplitude limiting circuit in radio frequency identification |
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2013
- 2013-11-28 CN CN201310612416.4A patent/CN103683991A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804855A (en) * | 2005-01-11 | 2006-07-19 | 盛群半导体股份有限公司 | Power supply processing interface in passive radio frequency identification system |
| US20070075147A1 (en) * | 2005-09-30 | 2007-04-05 | Stmicroelectronics Asia Pacific Pte. Ltd. | Circuits for preventing overvoltage conditions on antenna terminals and method |
| CN101989330A (en) * | 2009-08-07 | 2011-03-23 | 上海华虹Nec电子有限公司 | High-frequency radio frequency identification device (RFID) tag circuit and chip |
| CN102567767A (en) * | 2010-12-15 | 2012-07-11 | 上海华虹Nec电子有限公司 | Demodulator circuit of electronic tag of RFID (radio frequency identification) system |
| CN103199814A (en) * | 2012-01-06 | 2013-07-10 | 上海华虹集成电路有限责任公司 | Amplitude limiting circuit in radio frequency identification |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242702A (en) * | 2014-10-10 | 2014-12-24 | 苏州弘鹏新能源有限公司 | Busbar capacitance discharge protection circuit of photovoltaic inverter |
| CN108040199A (en) * | 2017-12-28 | 2018-05-15 | 广州爱易学智能信息科技有限公司 | Integrated audio/video harvester |
| CN108319188A (en) * | 2018-01-03 | 2018-07-24 | 广州爱易学智能信息科技有限公司 | Wisdom class board manages system |
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Application publication date: 20140326 |