CN104636787A - Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip - Google Patents
Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip Download PDFInfo
- Publication number
- CN104636787A CN104636787A CN201310553900.4A CN201310553900A CN104636787A CN 104636787 A CN104636787 A CN 104636787A CN 201310553900 A CN201310553900 A CN 201310553900A CN 104636787 A CN104636787 A CN 104636787A
- Authority
- CN
- China
- Prior art keywords
- transistor
- resistance
- electric capacity
- diode
- grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Noise Elimination (AREA)
Abstract
The invention discloses a demodulating circuit for an ultrahigh-frequency RFID (radio frequency identification) tag chip. The demodulating circuit comprises first to fourth capacitors, a first diode, a second diode, first to sixth transistors, first to fourth resistors and a comparator. The input signal end of a circuit is connected with the first end of the first capacitor; the output signal end of the circuit is connected with an anode of the second diode, the first end of the second capacitor, the first end of the first resistor, a source of the second transistor, the first end of the third capacitor, the first end of the fourth capacitor, a source of the fourth transistor and a source of the sixth transistor before grounded. The demodulating circuit has high noise suppressing performance and is low in power consumption.
Description
Technical field
The present invention relates to a kind of demodulator circuit, particularly relate to a kind of demodulator circuit for ultra-high frequency wireless RFID label chip.
Background technology
Super high frequency radio frequency recognition technology have contactless, recognition speed is fast, operating distance is far away, memory capacity is large and can block the advantages such as identification more, has been widely used in the industries such as production, retail, traffic and logistics.RFID passive label chip, as the core component of ultrahigh-frequency radio-frequency identification system, is the focus of research both at home and abroad in recent years always.But the demodulator circuit of its analog radio frequency front end also exists, and power consumption is high, the problem of poor anti jamming capability and low-dynamic range.
Summary of the invention
Object of the present invention is just to provide a kind of demodulator circuit for ultra-high frequency wireless RFID label chip to solve the problem.
In order to achieve the above object, present invention employs following technical scheme:
A kind of demodulator circuit for ultra-high frequency wireless RFID label chip, comprise the first electric capacity to the 4th electric capacity, first diode, second diode, the first transistor is to six transistors, first resistance is to the 4th resistance and comparer, circuit input signal end is connected with the first end of described first electric capacity, circuit output signal end respectively with the positive pole of described second diode, the first end of described second electric capacity, the first end of described first resistance, the source electrode of described transistor seconds, the first end of described 3rd electric capacity, the first end of described 4th electric capacity, the source electrode of described 4th transistor is connected rear ground connection with the source electrode of described 6th transistor, second end of described first electric capacity is connected with the positive pole of described first diode and the negative pole of described second diode respectively, the negative pole of described first diode respectively with the second end of described second electric capacity, the source electrode of described the first transistor, the drain electrode of transistor seconds is connected with the first end of described second resistance, the grid of described the first transistor respectively with the drain electrode of described the first transistor, second end of described first resistance is connected with the grid of described transistor seconds, second end of described second resistance respectively with the first end of described 3rd electric capacity, the first end of described 3rd resistance is connected with the negative terminal of described comparer, second end of described 3rd resistance is connected with described second end of the 4th electric capacity and the anode of described comparer respectively, the power end of described comparer respectively with the source electrode of described third transistor, the source electrode of described 5th transistor is with after voltage input end connection, the output terminal of described comparer is connected with the grid of described third transistor and the grid of described 4th transistor respectively, the drain electrode of described third transistor respectively with the drain electrode of described 4th transistor, the grid of described 5th transistor is connected with the grid of described 6th transistor, the drain electrode of described 5th transistor is connected with the first end of described 4th resistance, second end of described 4th resistance is connected with the drain electrode of described 6th transistor.
Beneficial effect of the present invention is:
A kind of demodulator circuit for ultra-high frequency wireless RFID label chip of the present invention, this circuit has good squelch performance and high dynamic range, and low in energy consumption.
Accompanying drawing explanation
Fig. 1 is a kind of demodulator circuit for ultra-high frequency wireless RFID label chip of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, a kind of demodulator circuit for ultra-high frequency wireless RFID label chip of the present invention, comprise the first electric capacity C1 to the 4th electric capacity C4, first diode D1, second diode D2, the first transistor P1 is to six transistor P6, first resistance R1 is to the 4th resistance R4 and comparer, circuit input signal end is connected with the first end of the first electric capacity C1, circuit output signal end respectively with the positive pole of the second diode D2, the first end of the second electric capacity C2, the first end of the first resistance R1, the source electrode of transistor seconds P2, the first end of the 3rd electric capacity C3, the first end of the 4th electric capacity C4, the source electrode of the 4th transistor P4 is connected rear ground connection with the source electrode of the 6th transistor P6, second end of the first electric capacity C1 is connected with the positive pole of the first diode D1 and the negative pole of the second diode D2 respectively, the negative pole of the first diode D1 respectively with second end of the second electric capacity C2, the source electrode of the first transistor P1, the drain electrode of transistor seconds P2 is connected with the first end of the second resistance R2, the grid of the first transistor P1 respectively with the drain electrode of the first transistor P1, second end of the first resistance R1 is connected with the grid of transistor seconds P2, second end of the second resistance R2 respectively with the first end of the 3rd electric capacity C3, the first end of the 3rd resistance R3 is connected with the negative terminal of comparer, second end of the 3rd resistance R3 is connected with second end of the 4th electric capacity C4 and the anode of comparer respectively, the power end of comparer respectively with the source electrode of third transistor P3, the source electrode of the 5th transistor P5 is connected with voltage input end, the output terminal of comparer is connected with the grid of third transistor P3 and the grid of the 4th transistor P4 respectively, the drain electrode of third transistor P3 respectively with the drain electrode of the 4th transistor P4, the grid of the 5th transistor P5 is connected with the grid of the 6th transistor P6, the drain electrode of the 5th transistor P5 is connected with the first end of the 4th resistance R4, second end of the 4th resistance R4 is connected with the drain electrode of the 6th transistor P6.
Principle of work of the present invention is as follows:
The frequency of circuit input signal, by by the first transistor P1 and the second resistance R2, the low-pass filter that 3rd electric capacity C3 forms, the signal produced first sends into the negative terminal of comparer, again by low-pass filtering for comparer provides reference voltage, then by two transistors, output voltage is carried out shaping, the square-wave signal of generation rule, export through signal output part.
Claims (1)
1. the demodulator circuit for ultra-high frequency wireless RFID label chip, it is characterized in that: comprise the first electric capacity to the 4th electric capacity, first diode, second diode, the first transistor is to six transistors, first resistance is to the 4th resistance and comparer, circuit input signal end is connected with the first end of described first electric capacity, circuit output signal end respectively with the positive pole of described second diode, the first end of described second electric capacity, the first end of described first resistance, the source electrode of described transistor seconds, the first end of described 3rd electric capacity, the first end of described 4th electric capacity, the source electrode of described 4th transistor is connected rear ground connection with the source electrode of described 6th transistor, second end of described first electric capacity is connected with the positive pole of described first diode and the negative pole of described second diode respectively, the negative pole of described first diode respectively with the second end of described second electric capacity, the source electrode of described the first transistor, the drain electrode of transistor seconds is connected with the first end of described second resistance, the grid of described the first transistor respectively with the drain electrode of described the first transistor, second end of described first resistance is connected with the grid of described transistor seconds, second end of described second resistance respectively with the second end of described 3rd electric capacity, the first end of described 3rd resistance is connected with the negative terminal of described comparer, second end of described 3rd resistance is connected with described second end of the 4th electric capacity and the anode of described comparer respectively, the power end of described comparer respectively with the source electrode of described third transistor, the source electrode of described 5th transistor is connected with voltage input end, the output terminal of described comparer is connected with the grid of described third transistor and the grid of described 4th transistor respectively, the drain electrode of described third transistor respectively with the drain electrode of described 4th transistor, the grid of described 5th transistor is connected with the grid of described 6th transistor, the drain electrode of described 5th transistor is connected with the first end of described 4th resistance, second end of described 4th resistance is connected with the drain electrode of described 6th transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310553900.4A CN104636787A (en) | 2013-11-08 | 2013-11-08 | Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310553900.4A CN104636787A (en) | 2013-11-08 | 2013-11-08 | Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104636787A true CN104636787A (en) | 2015-05-20 |
Family
ID=53215515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310553900.4A Pending CN104636787A (en) | 2013-11-08 | 2013-11-08 | Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104636787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243923A1 (en) * | 2020-06-05 | 2021-12-09 | 深圳市爱宝莱照明技术有限公司 | Signal modulation circuit, signal demodulation circuit, modulation/demodulation module, and electronic device |
-
2013
- 2013-11-08 CN CN201310553900.4A patent/CN104636787A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021243923A1 (en) * | 2020-06-05 | 2021-12-09 | 深圳市爱宝莱照明技术有限公司 | Signal modulation circuit, signal demodulation circuit, modulation/demodulation module, and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204188702U (en) | A kind of current detection circuit | |
| CN102004939B (en) | Demodulator circuit for the UHF (Ultrahigh Frequency) radio frequency identification label chip | |
| CN104091194A (en) | Demodulation circuit used for passive ultrahigh frequency RFID label chip | |
| CN105956647A (en) | Demodulation circuit used in a passive ultrahigh frequency radio-frequency identification label chip | |
| CN106815625A (en) | A kind of novel demodulation circuit of suitable ultralow Consumption | |
| CN104636787A (en) | Demodulating circuit for ultrahigh-frequency RFID (radio frequency identification) tag chip | |
| CN204316450U (en) | A kind of microwave frequency conversion power amplifier | |
| CN202364117U (en) | Internal power supply circuit of concentrator | |
| CN101833434B (en) | CMOS (Complementary Metal Oxide Semiconductor) random number generator | |
| CN203941545U (en) | A kind of demodulator circuit for passive ultra-high frequency RFID label chip | |
| CN103795346A (en) | Detection demodulation circuit in radio-frequency identification | |
| CN203590161U (en) | Efficient radio-frequency power amplifier | |
| CN203882882U (en) | External relay drive circuit | |
| CN204145437U (en) | A kind of square-wave signal generation circuit | |
| CN204810142U (en) | High frequency switching power supply's anti -jamming circuit | |
| CN104636789A (en) | Demodulation circuit used for RFID tag chip | |
| CN104252610A (en) | RFID-based radio-frequency front-end circuit | |
| CN202632347U (en) | Discharged voltage stabilizer in high-frequency interface of electronic tag | |
| CN202632346U (en) | Voltage stabilizer for medium-high frequency interface in electronic tag | |
| CN202634311U (en) | Rectifier for electronic labels | |
| CN203520443U (en) | Demodulation circuit used for RFID tag chip | |
| CN202633912U (en) | Rectifier of high-frequency interface in electronic label | |
| CN203275915U (en) | Acquisition signal amplifier of pump intelligent control system in transformer substation | |
| CN103532406A (en) | Rectifier applied to electronic tag | |
| CN204906322U (en) | Power consumptive few high frequency amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
|
| WD01 | Invention patent application deemed withdrawn after publication |