CN106887998A - The amplitude modulation module of mobile terminal data acquisition system - Google Patents
The amplitude modulation module of mobile terminal data acquisition system Download PDFInfo
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- CN106887998A CN106887998A CN201710140004.3A CN201710140004A CN106887998A CN 106887998 A CN106887998 A CN 106887998A CN 201710140004 A CN201710140004 A CN 201710140004A CN 106887998 A CN106887998 A CN 106887998A
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- amplitude
- signal
- module
- frequency
- resistor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/36—Amplitude modulation by means of semiconductor device having at least three electrodes
Abstract
The invention discloses the amplitude modulation module of mobile terminal data acquisition system, including local oscillator module, frequency multiplier, amplitude modulator, frequency mixer, power amplifier and low frequency signal input module, local oscillator module, frequency multiplier, amplitude modulator, frequency mixer and power amplifier are sequentially connected；Local oscillator module is used to produce carrier signal；Frequency multiplier is used to receive the carrier signal sent from local oscillator module；Amplitude modulator is used to that amplitude-modulated signal will to be produced in low frequency signal modulation to carrier wave；Frequency mixer be used for by high-frequency signal by a magnitude transform be another value；Power amplifier is used for the power amplification of signal to required transmission power；Low frequency signal input module is input into low frequency signal and is modulated for amplitude modulator.The present invention can be finely adjusted treatment to the amplitude of signal, the amplitude of output signal is met required standard so that signal is more stablized when uploading data, improve operating efficiency.
Description
Technical field
The present invention relates to a kind of modulator of acquisition terminal, and in particular to the amplitude modulation mould of mobile terminal data acquisition system
Block.
Background technology
Into 21 century, people obtain information before being no longer satisfied with the computer desk being sitting in office or family, and
It is the requirements at the higher level for proposing " obtaining information whenever and wherever possible ".The strong demand driving hair at full speed of mobile computing art
Exhibition, the client of information system extend on a large amount of mobile devices from desktop devices such as traditional PC, work stations.Collection
The phase modulation module of the mobile terminal of geologic data is built upon on the mobile terminal of mobile computing environment, limited processing capacity, knot
Close GPS positioning technology and wireless technology, there is provided geographic information services distributed, mobile, with chance property.Existing collection geology
The mobile terminal of data in use, easily disturbed by its internal component, usually jitter when data are uploaded,
Cause work efficiency drop.
The content of the invention
The technical problems to be solved by the invention are to solve the deficiencies in the prior art, it is therefore intended that provide mobile terminal data
The amplitude modulation module of acquisition system, solves the problems, such as that upstream data signal is unstable.
The present invention is achieved through the following technical solutions：
The amplitude modulation module of mobile terminal data acquisition system, including local oscillator module, frequency multiplier, amplitude modulator, frequency mixer,
Power amplifier and low frequency signal input module, the local oscillator module, frequency multiplier, amplitude modulator, frequency mixer and power amplification
Device is sequentially connected；The local oscillator module is used to produce carrier signal；The frequency multiplier is used to receive the load sent from local oscillator module
Ripple signal；The amplitude modulator is used to that amplitude-modulated signal will to be produced in low frequency signal modulation to carrier wave；The frequency mixer is used for will
High-frequency signal is another value by a magnitude transform；The power amplifier is used to send out the power amplification of signal needed for
Penetrate power；The low frequency signal input module input low frequency signal is modulated for amplitude modulator.
Further, the circuit between the frequency multiplier and amplitude modulator is provided with high-frequency amplifier, by high-frequency signal
Voltage magnitude be amplified to voltage magnitude needed for amplitude modulator.
Further, low-frequency amplifier is provided between the amplitude modulator and low frequency signal input module, low frequency is believed
Number voltage magnitude is amplified to voltage magnitude needed for amplitude modulator.
Further, the power amplifier uses class C power amplifier, because circuit output voltage is 100mV, institute
To select class C power amplifier.
Further, the local oscillator module uses tandem type crystal oscillating circuit, and frequency of oscillation is controlled by tandem type crystal oscillating circuit,
Stability is high.
Further, tandem type crystal oscillating circuit includes first resistor, second resistance, 3rd resistor, the first inductance, the first electricity
Appearance, the second electric capacity, the 3rd electric capacity, triode, crystal oscillator, the termination power VCC of first inductance one, its other end and triode
Colelctor electrode is connected；Described 3rd resistor one end is connected with the emitter stage of triode, its other end ground connection；Described second resistance one end
It is connected with the base stage of triode, its other end is connected with 3rd resistor earth terminal；3rd electric capacity is connected in parallel on second resistance two
End；Described first resistor one end is connected to the base stage of triode, and its other end is connected to that of the first inductance connection power supply VCC
End；Described crystal oscillator one end is connected on the circuit that triode is connected with 3rd resistor, and its other end is cathode output end；Described
One electric capacity one end is connected on the circuit that the first inductance is connected with triode, and its other end is connected to the cathode output end of crystal oscillator；
Described second electric capacity one end is connected with 3rd resistor earth terminal, and its other end is connected to the cathode output end of crystal oscillator；Described 3rd
The earth terminal of resistance is cathode output end.
The present invention compared with prior art, has the following advantages and advantages：Mobile terminal data collection of the present invention
The amplitude modulation module of system is provided with power amplifier and amplifies output signal so that in the mobile terminal of application collection geologic data,
The interference between internal component is avoided, while treatment can also be finely adjusted to the amplitude of signal, makes the width of output signal
Value meets required standard so that signal is more stablized when uploading data, improves operating efficiency.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention.
Fig. 2 is tandem type crystal oscillating circuit figure of the present invention.
Mark and corresponding parts title in accompanying drawing：
R1- first resistors, R2- second resistances, R3- 3rd resistors, the electric capacity of C1- first, the electric capacity of C2- second, the electricity of C3- the 3rd
Hold, Q1- triodes, T- crystal oscillators.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As shown in figure 1, the amplitude modulation module of mobile terminal data acquisition system, including local oscillator module, frequency multiplier, amplitude modulation(PAM)
Device, frequency mixer, power amplifier and low frequency signal input module, the local oscillator module, frequency multiplier, amplitude modulator, frequency mixer
And power amplifier is sequentially connected；The local oscillator module is used to produce carrier signal；The frequency multiplier is used to receive from local oscillator mould
The carrier signal that block sends；The amplitude modulator is used to that amplitude-modulated signal will to be produced in low frequency signal modulation to carrier wave；It is described mixed
Frequency device be used for by high-frequency signal by a magnitude transform be another value；The power amplifier is used to put the power of signal
The big transmission power needed for；The low frequency signal input module input low frequency signal is modulated for amplitude modulator.
Circuit between frequency multiplier and amplitude modulator is provided with high-frequency amplifier, and high-frequency signal voltage amplitude is amplified to
Voltage magnitude needed for amplitude modulator.Low-frequency amplifier is provided between amplitude modulator and low frequency signal input module, by low frequency
Signal voltage amplitude is amplified to voltage magnitude needed for amplitude modulator.Power amplifier uses class C power amplifier, due to electricity
Road output voltage amplitude is 100mV, so from class C power amplifier.Local oscillator module uses tandem type crystal oscillating circuit, vibration
Frequency is controlled by tandem type crystal oscillating circuit, and stability is high.
Tandem type crystal oscillating circuit includes first resistor R1, second resistance R2,3rd resistor R3, the first inductance L1, the first electricity
Hold C1, the second electric capacity C2, the 3rd electric capacity C3, triode Q1, crystal oscillator T, the termination power VCC of the first inductance L1 mono-, its is another
End is connected with the colelctor electrode of triode Q1；Described 3rd resistor R3 one end is connected with the emitter stage of triode Q1, its another termination
Ground；Described second resistance R2 one end is connected with the base stage of triode Q1, and its other end is connected with 3rd resistor R3 earth terminals；It is described
3rd electric capacity C3 is connected in parallel on second resistance R2 two ends；Described first resistor R1 one end is connected to the base stage of triode Q1, and its is another
End is connected to that one end of the first inductance L1 connection power supplys VCC；Described crystal oscillator T one end is connected to triode Q1 and 3rd resistor R3
On the circuit of connection, its other end is cathode output end；Described first electric capacity C1 one end is connected to the first inductance L1 and triode
On the circuit of Q1 connections, its other end is connected to the cathode output end of crystal oscillator T；Described second electric capacity C2 one end and 3rd resistor R3
Earth terminal is connected, and its other end is connected to the cathode output end of crystal oscillator T；The earth terminal of the 3rd resistor R3 is exported for negative pole
End.Tandem type crystal oscillator is presented low-resistance using crystal oscillator at its series resonance condition, once deviate at series resonance condition,
The characteristics of equivalent resistance is increased dramatically, it is connected in feedback branch.Meanwhile, the frequency of oscillation of tandem type crystal is exactly humorous crystal
Shake the series resonance frequency of device.The characteristics of this circuit, is used using quartz resonator as series resonant circuit.First inductance
The oscillation circuit of L1, the first electric capacity C1 and the second electric capacity C2 compositions is tuned at crystal oscillator, and in this frequency, crystal oscillator T presents very low
Impedance, feedback signal is very strong.For other frequencies, because the impedance of crystal oscillator T increases sharply, feedback weakens, it is impossible to produce vibration.
So, frequency of oscillation is controlled by crystal oscillator T, and stability is high.Crystal oscillator T is placed in and sent out altogether the positive-feedback circuit that amplifier is constituted by two-stage,
Composition is suitable to the series connection crystal oscillating circuit of low frequency.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (6)
1. the amplitude modulation module of mobile terminal data acquisition system, it is characterised in that including local oscillator module, frequency multiplier, amplitude modulation(PAM)
Device, frequency mixer, power amplifier and low frequency signal input module, the local oscillator module, frequency multiplier, amplitude modulator, frequency mixer
And power amplifier is sequentially connected；The local oscillator module is used to produce carrier signal；The frequency multiplier is used to receive from local oscillator mould
The carrier signal that block sends；The amplitude modulator is used to that amplitude-modulated signal will to be produced in low frequency signal modulation to carrier wave；It is described mixed
Frequency device be used for by high-frequency signal by a magnitude transform be another value；The power amplifier is used to put the power of signal
The big transmission power needed for；The low frequency signal input module input low frequency signal is modulated for amplitude modulator.
2. the amplitude modulation module of mobile terminal data acquisition system according to claim 1, it is characterised in that the frequency multiplier
Circuit between amplitude modulator is provided with high-frequency amplifier.
3. the amplitude modulation module of mobile terminal data acquisition system according to claim 1, it is characterised in that the amplitude is adjusted
Low-frequency amplifier is provided between device processed and low frequency signal input module.
4. the amplitude modulation module of mobile terminal data acquisition system according to claim 1, it is characterised in that the power is put
Big device uses class C power amplifier.
5. the amplitude modulation module of mobile terminal data acquisition system according to claim 1, it is characterised in that the local oscillator mould
Block uses tandem type crystal oscillating circuit.
6. the amplitude modulation module of mobile terminal data acquisition system according to claim 5, it is characterised in that the tandem type
Crystal oscillating circuit include first resistor (R1), second resistance (R2), 3rd resistor (R3), the first inductance (L1), the first electric capacity (C1),
Second electric capacity (C2), the 3rd electric capacity (C3), triode (Q1), crystal oscillator (T), the termination power VCC of the first inductance (L1), its
The other end is connected with the colelctor electrode of triode (Q1)；Described 3rd resistor (R3) one end is connected with the emitter stage of triode (Q1),
Its other end is grounded；Described second resistance (R2) one end is connected with the base stage of triode (Q1), its other end and 3rd resistor
(R3) earth terminal connection；3rd electric capacity (C3) is connected in parallel on second resistance (R2) two ends；Described first resistor (R1) one end connects
The base stage of triode (Q1) is connected on, its other end is connected to that one end of the first inductance (L1) connection power supply VCC；The crystal oscillator
(T) one end is connected on the circuit that triode (Q1) is connected with 3rd resistor (R3), and its other end is cathode output end；Described
One electric capacity (C1) one end is connected on the circuit that the first inductance (L1) is connected with triode (Q1), and its other end is connected to crystal oscillator
(T) cathode output end；Described second electric capacity (C2) one end is connected with 3rd resistor (R3) earth terminal, and its other end is connected to crystalline substance
Shake the cathode output end of (T)；The earth terminal of the 3rd resistor (R3) is cathode output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140004.3A CN106887998A (en) | 2017-03-10 | 2017-03-10 | The amplitude modulation module of mobile terminal data acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140004.3A CN106887998A (en) | 2017-03-10 | 2017-03-10 | The amplitude modulation module of mobile terminal data acquisition system |
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| CN106887998A true CN106887998A (en) | 2017-06-23 |
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| CN201710140004.3A Pending CN106887998A (en) | 2017-03-10 | 2017-03-10 | The amplitude modulation module of mobile terminal data acquisition system |
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Citations (5)
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| CN101714959A (en) * | 2008-12-30 | 2010-05-26 | 南京师范大学 | Analog/digital signal compound transfer transmitter and receiver |
| CN203287407U (en) * | 2013-01-16 | 2013-11-13 | 河北省电力公司电力科学研究院 | High voltage large power multiple harmonic generating device |
| CN204103932U (en) * | 2014-11-06 | 2015-01-14 | 南京长峰航天电子科技有限公司 | Phase amplitude-matched multi-channel radio frequency simulator |
| CN104467904A (en) * | 2014-11-20 | 2015-03-25 | 中国科学院上海微系统与信息技术研究所 | Millimeter wave receiving and transmitting front end based on receiving and transmitting double-source local oscillators |
| CN105100734A (en) * | 2015-08-31 | 2015-11-25 | 成都科创城科技有限公司 | Smart audio video mixed acquisition device adopting wireless induction charging wristband |
-
2017
- 2017-03-10 CN CN201710140004.3A patent/CN106887998A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714959A (en) * | 2008-12-30 | 2010-05-26 | 南京师范大学 | Analog/digital signal compound transfer transmitter and receiver |
| CN203287407U (en) * | 2013-01-16 | 2013-11-13 | 河北省电力公司电力科学研究院 | High voltage large power multiple harmonic generating device |
| CN204103932U (en) * | 2014-11-06 | 2015-01-14 | 南京长峰航天电子科技有限公司 | Phase amplitude-matched multi-channel radio frequency simulator |
| CN104467904A (en) * | 2014-11-20 | 2015-03-25 | 中国科学院上海微系统与信息技术研究所 | Millimeter wave receiving and transmitting front end based on receiving and transmitting double-source local oscillators |
| CN105100734A (en) * | 2015-08-31 | 2015-11-25 | 成都科创城科技有限公司 | Smart audio video mixed acquisition device adopting wireless induction charging wristband |
Non-Patent Citations (1)
| Title |
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| 电工学习网: "石英晶体振荡电路：串联型晶体振荡电路", 《HTTPS://WWW.DIANGON.COM/WENKU/RD/DIANZI/201501/00017633.HTML》 * |
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Application publication date: 20170623 |