CN104022740B - A kind of novel amplitude modulation apparatus - Google Patents
A kind of novel amplitude modulation apparatus Download PDFInfo
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- CN104022740B CN104022740B CN201410288540.4A CN201410288540A CN104022740B CN 104022740 B CN104022740 B CN 104022740B CN 201410288540 A CN201410288540 A CN 201410288540A CN 104022740 B CN104022740 B CN 104022740B
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- resistance
- power supply
- input impedance
- operational amplifier
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- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
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- 239000004065 semiconductor Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The invention discloses a kind of novel amplitude modulation apparatus, including high input impedance operational amplifier CA3140, carrier signal V3, fundamental signal V4, swept resistance R1, swept resistance R2, swept resistance R4, fixed resistance R3, fixed resistance R11, fixed resistance R21, power supply V1 and power supply V2；The present invention utilizes CA3140 to realize amplitude modulation as adjusting element; CA3140 is high input impedance operational amplifier; transistor input circuit in the grid (on PMOS) of CA3140 function of operational amplifier protection MOSFET provides the highest input impedance, extremely low input current and high speed performance；Operating power voltage is from 4V to 36V (the most single or double power supply), and it combines piezoelectricity PMOS transistor technique and the double advantage awarding transistor of high voltage. the amplifier of (complementary symmetry metal oxide semiconductor) excellent performance；Present configuration is simple, it is simple to regulation waveform, and stable performance, cheap, is especially suitable for colleges and universities' Electronics experimental project.
Description
Technical field
The present invention relates to amplitude modulation apparatus, a kind of novel amplitude modulation apparatus.
Background technology
The medium wave that amplitude modulation is the most generally said, scope is at 503---1060KHz.Amplitude modulation is with the height of sound
Become the signal of telecommunication of the change of amplitude.Distant, relatively big by inside even from weather, it is suitable for inter-provincial radio station
Broadcast.Amplitude modulation apparatus is that modulated signal and carrier signal are simultaneously applied on a non-linear element, example
Such as crystal diode or audion, through the frequency component of nonlinear transformation Cheng Xin, recycling resonant tank selects
Go out required frequency content.At present, Electronics course amplitude modulation apparatus uses audion modulation circuit, quilt
If adjust amplifier use small-power small-signal tuned amplifier, be divided three classes: base modulation circuit, send out
Emitter-base bandgap grading modulation circuit, collector amplitude modulation circuit.Experimentation finds its there is problems in that 1, electricity
Line structure is complicated, regulation inconvenience；2, fault rate is high, and circuit needs impedance matching；3, high frequency
Performance is undesirable, and amplitude modulation waveform is volatile very.Present invention aim at providing a kind of and keeping carrier frequency not
In the case of change, its amplitude is by the Simple amplitude modulation device of the control of first-harmonic.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, it is easy to the novel amplitude modulation apparatus of control, to solve
The problem certainly proposed in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of novel amplitude modulation apparatus, including high input impedance operational amplifier CA3140, carrier signal V3,
Fundamental signal V4, swept resistance R1, swept resistance R2, swept resistance R4, fixed resistance R3, fixing
Resistance R11, fixed resistance R21, power supply V1 and power supply V2；Described carrier signal V3 passes through fixed resistance
R11 and swept resistance R1 draws pin with second on high input impedance operational amplifier CA3140 and is connected；Described
Fundamental signal V4 draws pin by the 5th on fixed resistance R3 and high input impedance operational amplifier CA3140
It is connected；Described carrier signal V3 is arranged in parallel with fundamental signal V4；Described high input impedance operation amplifier
On device CA3140 the 3rd draws pin by swept resistance R2 and fixed resistance R21 ground connection；Described carrier wave is believed
Number V3, fundamental signal V4 ground connection respectively；Described power supply V1 connects with power supply V2；Described power supply V1's
Outfan draws pin with the 7th on high input impedance operational amplifier CA3140 and is connected；Described power supply V2's
Input draws pin with the 4th on high input impedance operational amplifier CA3140 and is connected；Described power supply V1 with
Line ground connection between power supply V2, and by resistance R4 and high input impedance operational amplifier CA3140
6th draws pin is connected；On described high input impedance operational amplifier CA3140 the 6th draws and is provided with one on pin
Outfan V0.
Further, described swept resistance R1, swept resistance R2 and swept resistance R4 are regulation resistance.
Compared with prior art, the invention has the beneficial effects as follows: novel amplitude modulation apparatus of the present invention, profit
Realizing amplitude modulation with CA3140 as adjusting element, CA3140 is high input impedance operational amplifier, CA3140
Transistor input circuit in the grid (on PMOS) of function of operational amplifier protection MOSFET provides very
High input impedance, extremely low input current and high speed performance；From 4V to 36V (no matter operating power voltage
Single or double power supply), it combines piezoelectricity PMOS transistor technique and the double advantage awarding transistor of high voltage. (mutually
Mend symmetry MOS) amplifier of excellent performance；Present configuration is simple, it is simple to regulation waveform,
And stable performance, cheap, it is especially suitable for colleges and universities' Electronics experimental project.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of novel amplitude modulation apparatus.
Fig. 2 is high input impedance operational amplifier CA3140 schematic diagram in novel amplitude modulation apparatus.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Referring to Fig. 1～2, in the embodiment of the present invention, a kind of novel amplitude modulation apparatus, including high input impedance
Operational amplifier CA3140, carrier signal V3, fundamental signal V4, swept resistance R1, swept resistance R2,
Swept resistance R4, fixed resistance R3, fixed resistance R11, fixed resistance R21, power supply V1 and power supply V2；
Described high input impedance operational amplifier CA3140, is a kind of high electricity that the Radio Corporation of America develops
The operational amplifier of pressure, the grid (PMOS of high input impedance operational amplifier CA3140 protection MOSFET
On) in transistor input circuit, it is provided that the highest input impedance, extremely low input current and high speed
Can, operating power voltage is from 4V to 36V (the most single or double power supply), and combines piezoelectricity PMOS crystal
Plumber's skill and the double advantage awarding transistor of high voltage, (complementary symmetry metal oxide semiconductor) excellent performance
Amplifier；Described carrier signal V3 is transported with high input impedance by fixed resistance R11 and swept resistance R1
On calculation amplifier CA3140 second is drawn pin and is connected；Described fundamental signal V4 is by fixed resistance R3 and height
On input impedance operational amplifier CA3140 the 5th draws pin and is connected；Described carrier signal V3 is believed with first-harmonic
Number V4 is arranged in parallel；On described high input impedance operational amplifier CA3140 the 3rd draws pin by sliding
Resistance R2 and fixed resistance R21 ground connection；Described carrier signal V3, fundamental signal V4 ground connection respectively；Institute
State power supply V1 to connect with power supply V2；The outfan of described power supply V1 and high input impedance operational amplifier
On CA3140 the 7th draws pin and is connected；The input of described power supply V2 and high input impedance operational amplifier
On CA3140 the 4th draws pin and is connected；Line ground connection between described power supply V1 and power supply V2, and by electricity
Resistance R4 draws pin with the 6th on high input impedance operational amplifier CA3140 and is connected；Described high input impedance
On operational amplifier CA3140 the 6th draws and is provided with an outfan V0 on pin.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment,
And without departing from the spirit or essential characteristics of the present invention, it is possible to real in other specific forms
The existing present invention.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and
Being nonrestrictive, the scope of the present invention is limited by claims rather than described above, therefore purport
All changes in falling in the implication of equivalency and scope of claim are included in the present invention.
Should not be considered as limiting involved claim by any reference in claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, but the most each reality
Mode of executing only comprises an independent technical scheme, and this narrating mode of description is only for understand
Seeing, those skilled in the art should be using description as an entirety, and the technical scheme in each embodiment is also
Other embodiments that it will be appreciated by those skilled in the art that can be formed through appropriately combined.
Claims (2)
1. a novel amplitude modulation apparatus, including high input impedance operational amplifier CA3140, carrier signal
V3, fundamental signal V4, swept resistance R1, swept resistance R2, swept resistance R4, fixed resistance R3,
Fixed resistance R11, fixed resistance R21, power supply V1 and power supply V2；It is characterized in that, described carrier wave is believed
Number V3 is by fixed resistance R11 and swept resistance R1 and high input impedance operational amplifier CA3140
Second draws pin is connected；Described fundamental signal V4 passes through fixed resistance R3 and high input impedance operational amplifier
On CA3140 the 5th draws pin and is connected；Described carrier signal V3 is arranged in parallel with fundamental signal V4；Described
On high input impedance operational amplifier CA3140 the 3rd draws pin by swept resistance R2 and fixed resistance R21
Ground connection；Described carrier signal V3, fundamental signal V4 ground connection respectively；Described power supply V1 connects with power supply V2；
The outfan of described power supply V1 draws pin with the 7th on high input impedance operational amplifier CA3140 and is connected；
The input of described power supply V2 draws pin with the 4th on high input impedance operational amplifier CA3140 and is connected；
Line ground connection between described power supply V1 and power supply V2, and by resistance R4 and high input impedance operation amplifier
On device CA3140 the 6th draws pin and is connected；On described high input impedance operational amplifier CA3140 the 6th
Draw and on pin, be provided with an outfan V0.
Novel amplitude modulation apparatus the most according to claim 1, it is characterised in that described swept resistance R1,
Swept resistance R2 and swept resistance R4 is regulation resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288540.4A CN104022740B (en) | 2014-06-25 | 2014-06-25 | A kind of novel amplitude modulation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410288540.4A CN104022740B (en) | 2014-06-25 | 2014-06-25 | A kind of novel amplitude modulation apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104022740A CN104022740A (en) | 2014-09-03 |
| CN104022740B true CN104022740B (en) | 2017-01-04 |
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|---|---|---|---|
| CN201410288540.4A Expired - Fee Related CN104022740B (en) | 2014-06-25 | 2014-06-25 | A kind of novel amplitude modulation apparatus |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203275483U (en) * | 2013-04-15 | 2013-11-06 | 上海理工大学 | Automatic amplitude modulation oscilloscope |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7369819B2 (en) * | 2005-04-14 | 2008-05-06 | Harris Corporation | Digital amplitude modulation transmitter with pulse width modulating RF drive |
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2014
- 2014-06-25 CN CN201410288540.4A patent/CN104022740B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203275483U (en) * | 2013-04-15 | 2013-11-06 | 上海理工大学 | Automatic amplitude modulation oscilloscope |
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| CN104022740A (en) | 2014-09-03 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Liangliang Inventor before: Fei Zhijin |
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| COR | Change of bibliographic data | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20161031 Address after: 451200 Gongyi Province, Chi Town, Henan Zhuang Village Li Xiang lane, No. 13 Applicant after: Li Liangliang Address before: Mudu Wuzhong District Jin Feng Road Suzhou city Jiangsu province 215000 1258 Building No. 11 Applicant before: Suzhou Ta Kesheng Electronic Science and Technology Co., Ltd. |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Long Inventor after: Shi Lixing Inventor after: Yu Yunxia Inventor after: Wang Zhihao Inventor after: Sun Yuncai Inventor before: Li Liangliang |
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Effective date of registration: 20161111 Address after: 276200 Shandong city of Linyi Province Hong Lu Liu Mengyin County No. 111 Applicant after: State Grid Shandong electric power company Mengyin power supply company Address before: 451200 Gongyi Province, Chi Town, Henan Zhuang Village Li Xiang lane, No. 13 Applicant before: Li Liangliang |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Long Inventor after: Shi Lixing Inventor after: Yu Yunxia Inventor after: Wang Zhihao Inventor after: Sun Yuncai Inventor before: Li Liangliang |
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Effective date of registration: 20161125 Address after: 276200 Shandong city of Linyi Province Hong Lu Liu Mengyin County No. 111 Applicant after: State Grid Shandong electric power company Mengyin power supply company Address before: 451200 Gongyi Province, Chi Town, Henan Zhuang Village Li Xiang lane, No. 13 Applicant before: Li Liangliang |
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