CN206472125U - A kind of low-cost wireless receiver - Google Patents
A kind of low-cost wireless receiver Download PDFInfo
- Publication number
- CN206472125U CN206472125U CN201621482959.4U CN201621482959U CN206472125U CN 206472125 U CN206472125 U CN 206472125U CN 201621482959 U CN201621482959 U CN 201621482959U CN 206472125 U CN206472125 U CN 206472125U
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- China
- Prior art keywords
- signal
- module
- wireless receiver
- intermediate frequency
- low
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- Noise Elimination (AREA)
Abstract
The utility model discloses a kind of low-cost wireless receiver, including the antenna being sequentially connected, match circuit, frequency mixer, intermediate frequency filtering module, intermediate frequency demodulation module, signal amplification module, signal filtering module by signal expansion module, signal buffer module and signal output terminal, the frequency mixer is also associated with local oscillator, the local oscillator connects the first single-chip microcomputer, and first single-chip microcomputer connects the intermediate frequency demodulation module and the signal buffer module respectively.The utility model wireless receiver reaches the purpose of demodulation by single-conversion, reduces circuit peripheral device, reduces use cost, facilitates production maintenance convenience etc., improves the competitiveness of product.
Description
Technical field
The utility model is related to radio receiver technology field, more particularly to a kind of low-cost wireless receiver.
Background technology
The design of main flow wireless microphone receiver in the market generally using double conversion and multiple intermediate frequency filtering come
Realization mixes down to intermediate frequency 10.7MHz by U/V band frequencies, then is demodulated and is reduced to audio signal.Such design materials are more, need
Multi-stage Low Noise Amplifier, multi items wave filter, multiple body oscillators are wanted, and the comparison of item to be debugged is more, if any many
All in individual, multiple potentiometers need debugging etc., and production efficiency is not high.
The design of main flow wireless microphone receiver is such generally by the way of digital pilot frequency is Jing Yin in the market
Circuit devcie is more, takes PCB surface product greatly, result in production cost high.
Utility model content
Defect based on prior art, the purpose of this utility model is to provide a kind of low-cost wireless receiver, passes through one
Secondary frequency conversion reaches the purpose of demodulation, reduces circuit peripheral device, reduces use cost, facilitates production maintenance, improves the competing of product
Strive power.
To achieve the above object, the technical solution of the utility model is：
A kind of low-cost wireless receiver, including be sequentially connected antenna, match circuit, frequency mixer, intermediate frequency filtering module,
Intermediate frequency demodulation module, signal amplification module, signal filtering module by signal expansion module, signal buffer module and signal output part
Son, the frequency mixer is also associated with local oscillator, and the local oscillator connects the first single-chip microcomputer, first single-chip microcomputer connect respectively it is described in
Frequency demodulation module and the signal buffer module.
Further, first single-chip microcomputer is also associated with LCD module.
Further, the output end of the signal filtering module is also selectable is connected with noise noise elimination module, by quiet
The signal of sound noise elimination inputs the signal expansion module and expanded, and the signal after expansion reduction is defeated again by signal buffer module
Go out to signal output terminal.
Further, the Jing Yin squelch circuit includes intermediate frequency amplifier, modem and controlling switch, the modulation
Demodulator is also connected with bandpass amplifier, and the bandpass amplifier connects noise elimination amplifier, and the noise elimination amplifier connects the respectively
The input of two single-chip microcomputers and controlling switch, the second singlechip is also connected with the input of controlling switch, the signal filtering
Unit output end connects the input of the intermediate frequency amplifier, and the output end of the controlling switch connects the signal expansion module
Input.
Further, the controlling switch is electronic switch.
The beneficial effects of the utility model are：Wireless receiver reaches the purpose of demodulation by single-conversion, reduces electricity
Road peripheral components, reduce use cost, facilitate production maintenance convenience etc., improve the competitiveness of product；
Compared with common FM frequency ranges, U sections on utility model works, and frequency-adjustable is whole, can with multi-center selection, from
And the frequency range that can avoid interference；
When system signal is bad, or turn off after microphone transmitters, can be according to noise by noise squelch circuit
Level, to decide whether to carry out silence processing to system, optimizes signal transacting, improves signal tonequality.
Brief description of the drawings
Fig. 1 is the circuit structure block diagram of the utility model specific embodiment；
Fig. 2 is noise noise elimination modular circuit structured flowchart of the present utility model.
Embodiment
The technique effect of design of the present utility model, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belongs to the model of the utility model protection
Enclose.
A kind of low-cost wireless receiver, including be sequentially connected antenna, match circuit, frequency mixer, intermediate frequency filtering module,
Intermediate frequency demodulation module, signal amplification module, signal filtering module by signal expansion module, signal buffer module and signal output part
Son, frequency mixer is also associated with local oscillator, and local oscillator connects the first single-chip microcomputer, the first single-chip microcomputer connect respectively the intermediate frequency demodulation module and
Signal buffer module.
The present embodiment U segment signals pass to frequency mixer after antenna is received after match circuit is matched.
Local oscillation signal controls phase-locked loop circuit by the first single-chip microcomputer, and PLL phase-locked loop circuits are according to the control signal received
The high frequency for sending a high accuracy and high stability is downloaded to power emission module, and this part includes Key Circuit：VCO
Device (VCO), it makes carrier frequency stable, strong antijamming capability, so that local frequency stability is good.
The present embodiment is mixed in U sections of frequency mixers, and the intermediate-freuqncy signal of generation carries out arrowband by intermediate frequency filtering module
After filtering, it is demodulated into intermediate frequency demodulation module.
The electric signal of sound is reduced into by intermediate frequency demodulation, then signal is carried out by operational amplifier in signal amplification module
Amplification, to reach the output audio level of needs.
Signal after amplification also needs to be filtered processing by signal filtering module, by unwanted high-frequency signal or low
Frequency signal is filtered, and is then expanded by signal expansion module, to increase the operating dynamic range of signal.Signal after expansion
Lead-out terminal is output to again by buffering, and lead-out terminal is connected by wire rod with other audio systems again.
The output end of signal filtering module is also associated with noise noise elimination module, can input signal by the signal of Jing Yin noise elimination
Expansion module is expanded, and the signal after expansion reduction is output to signal output terminal again by signal buffer module.Noise is quiet
Noise cancellation circuit is, when system signal is bad, or to turn off after microphone transmitters, and system is according to the level of noise, to determine to be
It is no that silence processing is carried out to system.
Jing Yin squelch circuit includes intermediate frequency amplifier, modem and controlling switch, and modem is also connected with band logical
Amplifier, bandpass amplifier connection noise elimination amplifier, noise elimination amplifier connects the input of second singlechip and controlling switch respectively
End, second singlechip is also connected with the input of controlling switch, and signal filtering unit output end connects the defeated of the intermediate frequency amplifier
Enter end, the output end of controlling switch connects the input that the signal expands module.The present embodiment controlling switch is electronic switch.
First single-chip microcomputer is also associated with LCD module.LCD module is a personal-machine interactive window of the present embodiment, and LCD can be with
Show the coherent signal of two passages simultaneously, such as working frequency, working channel, to frequency state, battery electric quantity signal, RF signals
Intensity bar, the intensity bar of AF signals.
It is good that the utility model preferably uses single-conversion effect, and control is simple, easy to use, and production is stable, and cost is low, full
The application of sufficient wireless microphone receiver.
It should be noted that simply preferred embodiment of the present utility model described above, the utility model not office
It is limited to above-mentioned embodiment, as long as it reaches technique effect of the present utility model with identical means, should all belongs to this practicality new
The protection domain of type.
Claims (5)
1. a kind of low-cost wireless receiver, including be sequentially connected antenna, match circuit, frequency mixer, intermediate frequency filtering module, in
Frequency demodulation module, signal amplification module, signal filtering module by signal expansion module, signal buffer module and signal output terminal,
The frequency mixer is also associated with local oscillator, and the local oscillator connects the first single-chip microcomputer, and first single-chip microcomputer connects the intermediate frequency respectively
Demodulation module and the signal buffer module.
2. low-cost wireless receiver as claimed in claim 1, it is characterised in that：First single-chip microcomputer is also associated with LCD
Module.
3. low-cost wireless receiver as claimed in claim 1, it is characterised in that：The output end of the signal filtering module is also
It is selectable to be connected with noise noise elimination module, the signal expansion module is inputted by the signal of Jing Yin noise elimination and expanded, is expanded
Open the signal after reduction and be output to signal output terminal again by signal buffer module.
4. low-cost wireless receiver as claimed in claim 3, it is characterised in that：The Jing Yin squelch circuit is put including intermediate frequency
Big device, modem and controlling switch, the modem are also connected with bandpass amplifier, and the bandpass amplifier connection is quiet
Make an uproar amplifier, the noise elimination amplifier connects second singlechip and the input of controlling switch respectively, and the second singlechip is also
The input of controlling switch is connected, the signal filtering unit output end connects the input of the intermediate frequency amplifier, the control
The output end of system switch connects the input that the signal expands module.
5. low-cost wireless receiver as claimed in claim 4, it is characterised in that：The controlling switch is electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621482959.4U CN206472125U (en) | 2016-12-30 | 2016-12-30 | A kind of low-cost wireless receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621482959.4U CN206472125U (en) | 2016-12-30 | 2016-12-30 | A kind of low-cost wireless receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206472125U true CN206472125U (en) | 2017-09-05 |
Family
ID=59712808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621482959.4U Expired - Fee Related CN206472125U (en) | 2016-12-30 | 2016-12-30 | A kind of low-cost wireless receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206472125U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115529056A (en) * | 2022-06-28 | 2022-12-27 | 南京源兴智达信息科技有限公司 | Receiver based on decision-oriented noncoherent Viterbi demodulation algorithm |
-
2016
- 2016-12-30 CN CN201621482959.4U patent/CN206472125U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115529056A (en) * | 2022-06-28 | 2022-12-27 | 南京源兴智达信息科技有限公司 | Receiver based on decision-oriented noncoherent Viterbi demodulation algorithm |
| CN115529056B (en) * | 2022-06-28 | 2023-10-03 | 南京源兴智达信息科技有限公司 | Receiver based on decision-oriented incoherent Viterbi demodulation algorithm |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20201230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |