CN207819888U - A kind of Wideband AM receiver - Google Patents
A kind of Wideband AM receiver Download PDFInfo
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- CN207819888U CN207819888U CN201820016120.4U CN201820016120U CN207819888U CN 207819888 U CN207819888 U CN 207819888U CN 201820016120 U CN201820016120 U CN 201820016120U CN 207819888 U CN207819888 U CN 207819888U
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- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
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- Circuits Of Receivers In General (AREA)
- Superheterodyne Receivers (AREA)
Abstract
The utility model discloses a kind of Wideband AM receivers, further include the low noise amplifier module being connected respectively with power module, mixer module, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low-pass filtering module, amplifier module, local oscillator module and main control module including power module；Low noise amplifier module, mixer module, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low-pass filtering module and amplifier module are sequentially connected；Amplifier module signal output end is connect with main control module signal input part, and main control module signal output end is connect with local oscillator module by signal input terminal, and local oscillator module by signal output end is connect with mixer module signal input part；The receiver modulation frequency range is wide, stable output signal, is distorted small, strong antijamming capability, is realized using modular mode, is simple in structure.
Description
Technical field
The utility model is related to AM receivers more particularly to a kind of Wideband AM receivers.
Background technology
AM receiver is for receiving am radio broadcast singal, amplitude modulation（AM）It is to go control high frequency to carry by modulated signal
The amplitude of wave is allowed to make linear change with modulated signal.AM receivers have very long developing history, from tuned radio-freuqnecy reception
To superheterodyne receiver, AM demodulation techniques are developed rapidly machine.
There are following defects for traditional AM receivers：AM is broadcasted, superheterodyne receiver RF amplifiers are in 535-
Between 1603kHz, medium-frequency IF 465kHz, if intermediate frequency is 10.7MHz, traditional AM receivers are then difficult to realize demodulate, and
Energy force difference is received, complex circuit, there are many noises for the signal band demodulated.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a kind of Wideband AM receiver,
The receiver modulation frequency range is wide, stable output signal, is distorted small, strong antijamming capability, is realized using modular mode, knot
Structure is simple.
Realizing the technical solution of the utility model aim is：
A kind of Wideband AM receiver, including power module further include the low noise being connected respectively with power module
Amplifier module, mixer module, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low-pass filtering mould
Block, amplifier module, local oscillator module and main control module are powered by power module is unified；Low noise amplifier module, frequency mixer mould
Block, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low-pass filtering module and amplifier module connect successively
It connects；Amplifier module signal output end is connect with main control module signal input part, main control module signal output end and local oscillator module
Signal input part connects, and local oscillator module by signal output end connect with mixer module signal input part, and amplitude-modulated signal is from low noise
The signal input part of amplifier module inputs, and finally exports demodulated signal from amplifier module.
The main control module is the main control module based on STM32, for work(such as AD acquisitions, 5110 liquid crystal displays of Nokia
Energy.
The local oscillator module, is the local oscillator module based on LMX2571 chips, the chip be a low-power consumption, high-performance,
Broadband PLLatinum radio frequencies (RF) synthesizer, reference frequency output：10MHz-1344MHz, phase noise and burr are low, low
Current drain.
The low noise amplifier module is the low noise amplifier module based on TQP3M9008 chips, chip frequency
Range 50-4000MHz, gain are 20.6dB@1.9GHz, and noise coefficient is 1.9 GHz of 1.3dB@.
The mixer module, is the mixer module based on AD831 chips, which uses Double deference analog multiplier
Mixting circuit has the three rank crosspoints+24dBm, and third order intermodulation distortion is small, while having the 1dB compression points of+10dBm, line
Property dynamic range is big, and local oscillator input signals only need -10dBm.
The intermediate frequency filtering module is the ceramic filter based on 10.7MHz, is stablized with performance, anti-interference energy
The features such as power is strong and price is low.
The LC frequency-selecting modules, are built using discrete component, and at low cost, then function admirable, easy to adjust.
The AGC modules, are the AGC modules based on AD8367 chips, which has the linear dB of 500MHz, 45dB can
Variable-gain amplifier, Embedded square-law detector are used for AGC operation.
The AM detection modules are the diode-less half-wave rectifying circuits constituted based on chip AD8061 chips, knot
Structure is simple, at low cost, even if applied signal voltage amplitude is the microvolt order of magnitude, remains to normal detection, and output distortion is small, realize compared with
It is easy.
The low-pass filtering module is one kind in ceramic filter or active filter；Ceramic filter uses
The features such as 10.7MHz stablizes with performance, strong antijamming capability and low price；Active filter realizes low pass using OP07,
Its is simple in structure, flat in passband, and stopband attenuation is fast.
The amplifier module is baseband amplifier, and using LM386 chips, quiescent dissipation is extremely low, only 24 milliwatts, is increased
Beneficial controllable, the distortion factor is low, and supply voltage range is wide.
Advantageous effect：A kind of Wideband AM receiver provided by the utility model, the receiver modulation frequency range
Extensively, stable output signal is distorted small, strong antijamming capability, is realized using modular mode, is simple in structure.It is connect with traditional AM
Receipts machine is compared, and it is 250MHz-300MHz that this broadband amplitude modulation receiver, which can demodulate carrier frequency, and input range virtual value is 6 μ V-
The AM signals that 1mV and modulation are 50%, intermediate frequency can be 10.7MHz, and modulation frequency range is wide, can reach 500Hz-5kHz, herein
In range, the amplitude of demodulated output signal can be stablized in 1V ± 0.1V, and undistorted, when input signal carrier frequency is walked with 1MHz
Into when, after adjusting local frequency, can also realize the demodulation function of AM signals, when input AM signals carrier frequency exist
In 250MHz ~ 300MHz, input signal changes between 6 μ V ~ 1mV, and when modulation is constant, output signal can also be stablized defeated
Go out, the utility model is distorted small, strong antijamming capability, can be widely applied to the fields such as broadcast.In view of using needs, use
Simple and better performances AM receivers are realized in modularized design on the basis of reducing cost.Between each module of receiver
Independently of each other, it is connected by sub-miniature A connector, not only can be used alone each module, realize specific function, and each module group
The systematization of AM demodulation can also be realized altogether.The combination of module and system, existing practicability have science again, for research
AM demodulates important in inhibiting.
Description of the drawings
Fig. 1 is a kind of structure diagram of Wideband AM receiver；
In figure, 1. power module, 2. low noise amplifier module, 3. mixer module, 4. intermediate frequency filtering module
8. amplifier module of 5.LC frequency-selectings module 6. main control module, 7. local oscillator module, 9. low-pass filtering module 10.AM detections
Module 11.AGC modules.
Specific implementation mode
The utility model is further elaborated with reference to the accompanying drawings and examples, but is not the limit to the utility model
It is fixed.
Embodiment：
As shown in Figure 1, a kind of Wideband AM receiver, including power module 1, further include respectively with power module 1
The low noise amplifier module 2 of connection, mixer module 3, intermediate frequency filtering module 4, LC frequency-selectings module 5, main control module 6, local oscillator
Module 7, amplifier module 8, low-pass filtering module 9 and AM detection modules 10, AGC modules 11 are powered by power module 1 is unified；
Low noise amplifier module 2, mixer module 3, intermediate frequency filtering module 4, LC frequency-selectings module 5, AGC modules 11, AM detection modules
10, low-pass filtering module 9 and amplifier module 8 are sequentially connected；8 signal output end of amplifier module and 6 signal of main control module are defeated
Enter end connection, 6 signal output end of main control module connect with 7 signal input part of local oscillator module, 7 signal output end of local oscillator module and mixes
3 signal input part of frequency device module connects, and amplitude-modulated signal is inputted from the signal input part of low noise amplifier module 2, finally from putting
Big device module 8 exports demodulated signal；It is connected using sub-miniature A connector between each module.
The main control module 6 is the main control module based on STM32, for work(such as AD acquisitions, 5110 liquid crystal displays of Nokia
Energy.
The local oscillator module 7, is the local oscillator module 7 based on LMX2571 chips, which is a low-power consumption, Gao Xing
Energy, broadband PLLatinum radio frequencies (RF) synthesizer, reference frequency output：10MHz-1344MHz, phase noise and burr
It is low, low-power consumption.
The low noise amplifier module 2, using TQP3M9008 chips, chip frequency range 50-4000MHz increases
Benefit：1.9 GHz of 20.6dB@, noise coefficient：1.3dB@1.9 GHz.
The mixer module 3, is the mixer module 3 based on AD831 chips, which is multiplied using Double deference simulation
Musical instruments used in a Buddhist or Taoist mass mixting circuit has the three rank crosspoints+24dBm, and third order intermodulation distortion is small, while having the 1dB compression points of+10dBm,
Linear dynamic range is big, and local oscillator input signals only need -10dBm.
The intermediate frequency filtering module 4 is the ceramic filter based on 10.7MHz, is stablized with performance, anti-interference energy
The features such as power is strong and price is low.
The LC frequency-selectings module 5, is built using discrete component, and at low cost, then function admirable, easy to adjust.
The AGC modules 11, are the AGC modules 11 based on AD8367 chips, which has 500 MHz, 45dB lines
Property dB variable gain amplifiers, Embedded square-law detector be used for AGC operation.
The AM detection modules 10 are the diode-less half-wave rectifying circuit constituted based on AD8061 chips, structure
Simply, at low cost, even if applied signal voltage amplitude is the microvolt order of magnitude, normal detection is remained to, output distortion is small, realizes and relatively holds
Easily.
The low-pass filtering module 9 is the active low-pass filter constituted based on chip OP07, simple in structure,
Flat in passband, stopband attenuation is fast.
The amplifier module 8 is the amplifier module 8 based on LM386 chips, and quiescent dissipation is extremely low, only 24 milliwatts,
Gain controllable, the distortion factor is low, and supply voltage range is wide.
Claims (10)
1. a kind of Wideband AM receiver, which is characterized in that further include being connected respectively with power module including power module
Low noise amplifier module, mixer module, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low pass
Filter module, amplifier module, local oscillator module and main control module are powered by power module is unified；Low noise amplifier module mixes
Frequency device module, intermediate frequency filtering module, LC frequency-selectings module, AGC modules, AM detection modules, low-pass filtering module and amplifier module
It is sequentially connected；Amplifier module signal output end is connect with main control module signal input part, main control module signal output end and sheet
Module by signal of shaking input terminal connects, and local oscillator module by signal output end connect with mixer module signal input part, amplitude-modulated signal from
The signal input part of low noise amplifier module inputs, and finally exports demodulated signal from amplifier module.
2. a kind of Wideband AM receiver according to claim 1, which is characterized in that the main control module is base
In the main control module of STM32.
3. a kind of Wideband AM receiver according to claim 1, which is characterized in that the local oscillator module is
Local oscillator module based on LMX2571 chips.
4. a kind of Wideband AM receiver according to claim 1, which is characterized in that the low-noise amplifier
Module is the low noise amplifier module based on TQP3M9008 chips.
5. a kind of Wideband AM receiver according to claim 1, which is characterized in that the mixer module is
Mixer module based on AD831 chips.
6. a kind of Wideband AM receiver according to claim 1, which is characterized in that the intermediate frequency filtering mould
The features such as block is the ceramic filter based on 10.7MHz, is stablized with performance, strong antijamming capability and low price.
7. a kind of Wideband AM receiver according to claim 1, the AGC modules are to be based on AD8367 cores
The AGC modules of piece.
8. a kind of Wideband AM receiver according to claim 1, which is characterized in that the AM detection modules,
It is the diode-less half-wave rectifying circuit constituted based on chip AD8061 chips.
9. a kind of Wideband AM receiver according to claim 1, which is characterized in that the low-pass filtering mould
Block is one kind in ceramic filter or active filter.
10. a kind of Wideband AM receiver according to claim 1, which is characterized in that the amplifier module,
For baseband amplifier, using LM386 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820016120.4U CN207819888U (en) | 2018-01-05 | 2018-01-05 | A kind of Wideband AM receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820016120.4U CN207819888U (en) | 2018-01-05 | 2018-01-05 | A kind of Wideband AM receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207819888U true CN207819888U (en) | 2018-09-04 |
Family
ID=63326008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820016120.4U Expired - Fee Related CN207819888U (en) | 2018-01-05 | 2018-01-05 | A kind of Wideband AM receiver |
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| Country | Link |
|---|---|
| CN (1) | CN207819888U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350932A (en) * | 2019-07-03 | 2019-10-18 | 南京大学 | A kind of high-frequency wideband receiver and signal processing method |
-
2018
- 2018-01-05 CN CN201820016120.4U patent/CN207819888U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350932A (en) * | 2019-07-03 | 2019-10-18 | 南京大学 | A kind of high-frequency wideband receiver and signal processing method |
| CN110350932B (en) * | 2019-07-03 | 2021-06-18 | 南京大学 | High-frequency broadband receiver and signal processing method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180904 |