CN103530675A - Voltage stabilizer for voltage discharging in high-frequency interface of electronic tag - Google Patents
Voltage stabilizer for voltage discharging in high-frequency interface of electronic tag Download PDFInfo
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- CN103530675A CN103530675A CN201210225620.6A CN201210225620A CN103530675A CN 103530675 A CN103530675 A CN 103530675A CN 201210225620 A CN201210225620 A CN 201210225620A CN 103530675 A CN103530675 A CN 103530675A
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Abstract
The invention discloses a voltage stabilizer for voltage discharging in a high-frequency interface of an electronic tag. The voltage stabilizer consists of a first resistor, a second resistor and a first N-channel metal oxide semiconductor (NMOS) tube. To be specific, the two terminals of the first resistor are respectively connected with the second resistor and a drain electrode of the first NMOS tube; and a source electrode of the first NMOS tube is grounded. The other terminal, oppositely connected with the first resistor terminal, of the second resistor, is connected with a grid electrode of the first NMOS tube. A direct-current voltage input line is connected to a circuit between the drain electrode of the first NMOS tube and the first resistor; and a direct-current voltage output line is connected to the circuit between the second resistor and the first resistor. According to the scheme, the provided voltage stabilizer with the simple structure can be realized conveniently. And when the voltage stabilizer is used, the hopping of discharge voltages can be avoided under the effect of the first NMOS tube, thereby avoiding a demodulation failure.
Description
Technical field
The present invention relates to radio-frequency technique field, specifically the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag.
Background technology
Along with the fast development of electronic technology and improving constantly of manufacture level, the REID development that adopts radio to realize is swift and violent, radio frequency recognizing electronic label is as a kind of non-contact IC card, it,, by radiotelegraphy and the combination of IC technology, is automatically identified destination object and is obtained related data by radiofrequency signal.In radio-frequency recognition system, the high frequency interface of electronic tag forms the high-frequency transmission path from reader to electronic tag, and high frequency interface is Absorption Current from its antenna, and using after the current commutates voltage stabilizing absorbing in electronic tag the power supply of chip.In high frequency interface, be provided with voltage stabilizer, voltage stabilizer is mainly used in preventing the direct supply overtension after rectification, and too high DC voltage is released, existing voltage stabilizer is by supply voltage and certain normal voltage are compared, and then obtain the voltage that need release, the discharge voltage obtaining like this has the process of a unexpected saltus step of voltage, make the change amount of leakage current before and after saltus step larger, this depth of modulation that may make to receive signal is very little in certain section of field strength range, and then can cause demodulation failure.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide when input direct voltage is too high, voltage is released and can be avoided discharge voltage to occur the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag of saltus step.
Object of the present invention is achieved through the following technical solutions: the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag, comprise the first resistance, the second resistance and NMOS pipe, described the first resistance two ends are connected with a NMOS pipe drain electrode with the second resistance respectively, the source ground of the one NMOS pipe, the other end that described the second resistance connects the first resistance terminal is relatively connected with a NMOS tube grid; On circuit between a described NMOS pipe drain electrode and the first resistance, be connected with DC voltage input line, on the circuit between described the second resistance and the first resistance, be connected with direct voltage output line.DC voltage input line in the present invention receives the DC voltage after the rectification of high frequency interface, and direct voltage output line is by the direct voltage output after voltage stabilizing.
The voltage stabilizer of discharge voltage in the high frequency interface of electronic tag, also comprise the 2nd NMOS pipe, the 3rd NMOS pipe and the 4th NMOS pipe, described the 2nd NMOS pipe, the 3rd NMOS pipe and the 4th NMOS pipe three's grid is all connected on one end of the first resistance connection the one NMOS pipe drain electrode, connection between described the 2nd NMOS pipe drain electrode and a NMOS tube grid and the second resistance, the source electrode of the 3rd NMOS pipe is connected with the 2nd NMOS pipe source electrode with the 4th NMOS pipe drain electrode respectively with drain electrode, the 4th NMOS pipe source ground.The circuit that in the present invention, the 2nd NMOS pipe, the 3rd NMOS pipe and the 4th NMOS pipe connect forms current foldback circuit.
On described direct voltage output line, be connected with the first electric capacity, the other end that described the first electric capacity connects direct voltage output line end is relatively connected with a NMOS pipe source electrode.The present invention carries out filtering by the first resistance and the first electric capacity to the DC voltage of input, filtering HFS wherein, thus make the DC voltage of output more steady, the first electric capacity can receive the electric current of releasing.
Described the second resistance is adjustable resistance.The present invention can regulate and control acting on the voltage of a NMOS tube grid in the present invention by adjustable resistance, and then discharge voltage is regulated and controled.
Compared with prior art, the present invention has following beneficial effect: the present invention includes the first resistance, the second resistance and NMOS pipe, the present invention releases to DC voltage by a NMOS pipe when output dc voltage is too high, thereby reach the object that reduces voltage, autogenous control effect because of a NMOS pipe, in the time of avoiding discharge voltage there is saltus step in voltage, and then can avoid because leakage current is in larger the caused demodulation failure of the change amount before and after saltus step.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In accompanying drawing, the corresponding name of Reference numeral is called: R1-the first resistance, R2-the second resistance, N1-one NMOS pipe, N2-two NMOS pipe, N3-three NMOS pipe, N4-four NMOS pipe, 1-DC voltage input line, 2-direct voltage output line.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment:
As shown in Figure 1, the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag, comprise the first resistance R 1, the second resistance R 2, the first capacitor C 1 and four metal-oxide-semiconductors, wherein, four metal-oxide-semiconductors are respectively a NMOS pipe N1, the 2nd NMOS pipe N2, the 3rd NMOS pipe N3 and the 4th NMOS pipe N4.The second resistance R 2 is adjustable resistance, and the first resistance R 1 two ends are connected with a NMOS pipe N1 drain electrode with the second resistance R 2 respectively, the source ground of a NMOS pipe N1, and the other end that the second resistance R 2 connects the first resistance R 1 end is relatively connected with a NMOS pipe N1 grid.On circuit between the one NMOS pipe N1 drain electrode and the first resistance R 1, be connected with on the circuit between DC voltage input line 1, the second resistance R 2 and the first resistance R 1 and be connected with direct voltage output line 2.
The 2nd NMOS pipe N2, the 3rd NMOS pipe N3 and the 4th NMOS pipe N4 three's grid is all connected on one end of the first resistance R 1 connection the one NMOS pipe N1 drain electrode, connection between the 2nd NMOS pipe N2 drain electrode and NMOS pipe N1 grid and the second resistance R 2, the source electrode of the 3rd NMOS pipe N3 is connected with the 2nd NMOS pipe N2 source electrode with the 4th NMOS pipe N4 drain electrode respectively with drain electrode, the 4th NMOS pipe N4 source ground.The other end that the first capacitor C 1 connects direct voltage output line 2 ends is relatively connected with a NMOS pipe N1 source electrode.
As mentioned above, can well realize the present invention.
Claims (4)
1. the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag, it is characterized in that: comprise the first resistance (R1), the second resistance (R2) and NMOS pipe (N1), described the first resistance (R1) two ends are managed (N1) drain electrode with the second resistance (R2) with a NMOS respectively and are connected, the source ground of the one NMOS pipe (N1), the other end that described the second resistance (R2) connects the first resistance (R1) end is relatively managed (N1) grid with a NMOS and is connected; On circuit between described NMOS pipe (N1) drain electrode and the first resistance (R1), be connected with DC voltage input line (1), on the circuit between described the second resistance (R2) and the first resistance (R1), be connected with direct voltage output line (2).
2. the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag according to claim 1, it is characterized in that: also comprise the 2nd NMOS pipe (N2), the 3rd NMOS pipe (N3) and the 4th NMOS pipe (N4), described the 2nd NMOS pipe (N2), the 3rd NMOS pipe (N3) and the 4th NMOS pipe (N4) three's grid is all connected on one end that the first resistance (R1) connects NMOS pipe (N1) drain electrode, connection between described the 2nd NMOS pipe (N2) drain electrode and NMOS pipe (N1) grid and the second resistance (R2), the source electrode of the 3rd NMOS pipe (N3) is connected with the 2nd NMOS pipe (N2) source electrode with the 4th NMOS pipe (N4) drain electrode respectively with drain electrode, the 4th NMOS pipe (N4) source ground.
3. the voltage stabilizer of discharge voltage in the high frequency interface of electronic tag according to claim 1, it is characterized in that: on described direct voltage output line (2), be connected with the first electric capacity (C1), the other end that described the first electric capacity (C1) connects direct voltage output line (2) end is relatively managed (N1) source electrode with a NMOS and is connected.
4. according to the voltage stabilizer of discharge voltage in the high frequency interface of any electronic tag described in claim 1～3, it is characterized in that: described the second resistance (R2) is adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225620.6A CN103530675A (en) | 2012-07-03 | 2012-07-03 | Voltage stabilizer for voltage discharging in high-frequency interface of electronic tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225620.6A CN103530675A (en) | 2012-07-03 | 2012-07-03 | Voltage stabilizer for voltage discharging in high-frequency interface of electronic tag |
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| Publication Number | Publication Date |
|---|---|
| CN103530675A true CN103530675A (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210225620.6A Pending CN103530675A (en) | 2012-07-03 | 2012-07-03 | Voltage stabilizer for voltage discharging in high-frequency interface of electronic tag |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004939A (en) * | 2010-11-30 | 2011-04-06 | 电子科技大学 | Demodulator circuit for the UHF (Ultrahigh Frequency) radio frequency identification label chip |
| CN102456151A (en) * | 2010-11-01 | 2012-05-16 | 上海华虹Nec电子有限公司 | Clamping circuit for electronic tag of RFID (radio frequency identification) system |
| CN202632347U (en) * | 2012-07-03 | 2012-12-26 | 成都市宏山科技有限公司 | Discharged voltage stabilizer in high-frequency interface of electronic tag |
-
2012
- 2012-07-03 CN CN201210225620.6A patent/CN103530675A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456151A (en) * | 2010-11-01 | 2012-05-16 | 上海华虹Nec电子有限公司 | Clamping circuit for electronic tag of RFID (radio frequency identification) system |
| CN102004939A (en) * | 2010-11-30 | 2011-04-06 | 电子科技大学 | Demodulator circuit for the UHF (Ultrahigh Frequency) radio frequency identification label chip |
| CN202632347U (en) * | 2012-07-03 | 2012-12-26 | 成都市宏山科技有限公司 | Discharged voltage stabilizer in high-frequency interface of electronic tag |
Non-Patent Citations (2)
| Title |
|---|
| 李林: "《高等模拟集成电路》", 28 February 2006 * |
| 李林: "射频识别电子标签的研究与设计", 《中国优秀硕士学位论文全文数据库》 * |
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Application publication date: 20140122 |