CN1808913A - VHF-UHF wireless microphone - Google Patents
VHF-UHF wireless microphone Download PDFInfo
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- CN1808913A CN1808913A CN 200510102245 CN200510102245A CN1808913A CN 1808913 A CN1808913 A CN 1808913A CN 200510102245 CN200510102245 CN 200510102245 CN 200510102245 A CN200510102245 A CN 200510102245A CN 1808913 A CN1808913 A CN 1808913A
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Abstract
This invention relates to high frequency section wireless phone, which comprises wireless phone erudition device, wireless receiver and is characterized by the following: the wireless phone erudition has receiver or irradiation infrared frequency information receiver or eradiate and relative information conversion circuit; the wireless receiver has erudition with erudition and infrared information and relative information conversion circuit to realize wireless phone eradiate.
Description
Technical field:
The present invention relates to a kind of wireless microphone equipment.
Background technology:
The existing widely used Wireless microphone device that is operated in VHF-UHF (VHF-UHF), the method that its operating frequency produces has 3 kinds: 1, RC oscillating circuit, 2, crystal oscillating circuit, 3. quartzy phase-locked loop frequency combiner circuit.No matter which kind of circuit, the operating frequency of their reflector and receiver is fixed when dispatching from the factory, and the user can not change it voluntarily.Like this, if when in the same area, using some wireless microphones, for avoiding interference, the equipment that just needs the many covers of configuration different frequency, but the equipment of different frequency, their reflector, receiver cannot exchange use, give a large amount of Wireless microphone devices that use like this, wish that again the user (as school) that each reflector and all receivers can both match has brought very big inconvenience and restriction.
Summary of the invention:
Goal of the invention of the present invention is to provide a kind of different equipment, and its receiver or reflector can change self operating frequency according to the reflector or the receiver of different frequency, realize automatic frequency tracking, and their reflector and receiver can match arbitrarily.Realize receiver or reflector automatic frequency tracking, must realize communicating by letter of frequency information between reflector and the receiver, here, the present invention adopts the method for infrared communication, to be reflector or receiver be compiled into the infrared information coding with its frequency information sends, and after receiver or reflector are received the infrared information coding, through the decoding compiling it is reduced into frequency information, control, change the operating frequency of self, realize automatic frequency tracking.
The present invention realizes like this, comprise the wireless microphone reflector, the wireless microphone receiver, its special feature is that the wireless microphone reflector is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit and infrared emission circuit or infrared receiving circuit, microphone, the audio amplifier circuit that microphone and oscillating circuit are connected together, the radio frequency amplifying circuit that is communicated with oscillating circuit, the transmitting antenna that is communicated with radio frequency amplifying circuit constitutes, and the wireless microphone receiver is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit, by monolithic processor controlled and with the infrared emission circuit or the corresponding infrared receiving circuit or the infrared emission circuit of infrared receiving circuit of wireless microphone reflector, reception antenna, the radio frequency amplifying circuit that is communicated with reception antenna, the frequency changer circuit that is communicated with radio frequency amplifying circuit and oscillating circuit respectively, the intermediate frequency that is communicated with frequency changer circuit amplifies, frequency-discriminating circuit, amplify with intermediate frequency, the audio frequency output that frequency-discriminating circuit is communicated with constitutes.During work, earlier wireless launcher, wireless receiver are communicated with each other by infrared-ray communication, regulate the frequency of oscillation of the oscillating circuit of wireless launcher, wireless receiver by single-chip microcomputer, make the operating frequency unanimity of wireless launcher, wireless receiver, like this, wireless launcher, wireless receiver just can carry out transmission, the processing of wireless audio signal.Its course of work is such, when wireless launcher as main control device the time, the tranmitting frequency of wireless launcher pre-sets, touch the infrared light firing button of infrared emission circuit earlier, single-chip microcomputer will outwards be launched the frequency preset coding with the form of infrared coding information by the infrared emission circuit, after the infrared receiving circuit that the single-chip microcomputer of wireless receiver is controlled receives infrared coding information, by single single-chip microcomputer control oscillation circuit, make the operating frequency of wireless receiver consistent with the tranmitting frequency that infrared coding information is reflected, like this, the audio signal that microphone produced is through audio amplifier circuit, oscillating circuit, radio frequency amplifying circuit, transmission is come out behind the transmitting antenna, after wireless receiver receives this signal, through radio frequency amplifying circuit, frequency changer circuit, intermediate frequency amplifies, be reduced into audio frequency output behind the frequency-discriminating circuit; When wireless receiver during as main control device, the operating frequency of wireless receiver pre-sets, touch the infrared light firing button of infrared emission circuit earlier, single-chip microcomputer will outwards be launched the frequency preset coding with the form of infrared coding information by the infrared emission circuit, after the infrared receiving circuit that the single-chip microcomputer of wireless launcher is controlled receives infrared coding information, frequency by the Single-chip Controlling oscillating circuit, make the frequency of oscillating circuit output consistent with the receiver frequency that infrared coding information is reflected, like this, the audio signal that microphone produced is through audio amplifier circuit, oscillating circuit, radio frequency amplifying circuit, transmission is come out behind the transmitting antenna, after wireless receiver receives this signal, through frequency changer circuit, intermediate frequency amplifies, be reduced into audio signal output behind the frequency-discriminating circuit.
Here, the oscillating circuit of wireless microphone reflector, wireless microphone receiver mainly is made of phase-locked loop frequency combiner circuit, the Voltage-Controlled oscillation circuit that is connected with the phase-locked loop frequency combiner circuit, the phase-locked loop frequency combiner circuit is connected with single-chip microcomputer, and Voltage-Controlled oscillation circuit is connected with frequency changer circuit or radio frequency amplifying circuit.
Compared with the prior art the present invention has distinct device, their reflector, receiver be can match arbitrarily use, improved the convenience that equipment uses and the advantage of flexibility greatly.
Description of drawings:
Fig. 1 is the wireless microphone transmitter circuit figure of the embodiment of the invention 1;
Fig. 2 is the wireless microphone acceptor circuit figure of the embodiment of the invention 1;
Fig. 3 is the wireless microphone transmitter circuit figure of the embodiment of the invention 2;
Fig. 4 is the wireless microphone acceptor circuit figure of the embodiment of the invention 2.
Embodiment:
Now in conjunction with the accompanying drawings and embodiments the present invention is described in further detail:
Embodiment 1: as Fig. 1, shown in Figure 2, the present invention includes the wireless microphone reflector, the wireless microphone receiver, the wireless microphone reflector is as main control device, the conduct of wireless microphone receiver is from control equipment, its special feature is that the wireless microphone reflector is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit and infrared emission circuit, microphone, the audio amplifier circuit that microphone and oscillating circuit are connected together, the radio frequency amplifying circuit that is communicated with oscillating circuit, the transmitting antenna that is communicated with radio frequency amplifying circuit constitutes, oscillating circuit is by the phase-locked loop frequency combiner circuit, the Voltage-Controlled oscillation circuit that is connected with the phase-locked loop frequency combiner circuit constitutes, the phase-locked loop frequency combiner circuit is connected with single-chip microcomputer, and Voltage-Controlled oscillation circuit is connected with radio frequency amplifying circuit; The wireless microphone receiver is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit, by monolithic processor controlled and corresponding infrared receiving circuit with the outer radiating circuit of wireless microphone reflector, reception antenna, the radio frequency amplifying circuit that is communicated with reception antenna, the frequency changer circuit that is communicated with radio frequency amplifying circuit and oscillating circuit respectively, the intermediate frequency that is communicated with frequency changer circuit amplifies, frequency-discriminating circuit, amplify with intermediate frequency, the audio frequency output that frequency-discriminating circuit is communicated with constitutes, oscillating circuit is by the phase-locked loop frequency combiner circuit, the Voltage-Controlled oscillation circuit that is connected with the phase-locked loop frequency combiner circuit constitutes, the phase-locked loop frequency combiner circuit is connected with single-chip microcomputer, and Voltage-Controlled oscillation circuit is connected with frequency changer circuit.The phase-locked loop frequency combiner circuit is selected MC145157-2 for use, and single-chip microcomputer is selected PIC16C54 for use.
The wireless microphone reflector adopts quartzy pll frequency synthesizer, its tranmitting frequency is preset under the control of single-chip microcomputer, as the operating frequency range of setting receiver is 400MHz-420MHz, channel spacing is 200KHz, the reflector that so just 100 channel spacings can be set be 200KHz.During work, single-chip microcomputer is set according to tranmitting frequency, send one group with set the corresponding control signal of frequency, remove to control phase-locked loop frequency synthesizer circuit and Voltage-Controlled oscillation circuit, the frequency that Voltage-Controlled oscillation circuit is produced is locked on this setpoint frequency, the audio signal that microphone picks is added to Voltage-Controlled oscillation circuit and carries out frequency modulation(FM) after audio amplifier circuit amplifies, modulating frequency (as 410MHZ) is gone out by transmission antennas transmit after radio frequency amplifier amplifies, simultaneously, single-chip microcomputer is compiled into one group of infrared information with tranmitting frequency information, be deposited with in the register, click infrared information and send button, the infrared information coding sends by the infrared light transmitting tube.
The transmitter frequency information that the infrared light receiving circuit of wireless microphone receiver receives, through single-chip microcomputer decoding compiling, send one group of control signal, remove to control phase-locked loop frequency synthesizer circuit and Voltage-Controlled oscillation circuit, the frequency (as 365.3MHz) that Voltage-Controlled oscillation circuit is produced is locked in than transmitter frequency (as 410MHZ) and differs from the difference frequency (as 44.7MHz), radio frequency amplifier amplifies the signal that reception antenna receives, the signal that produces with Voltage-Controlled oscillation circuit carries out frequency conversion, here, amplify at first frequency changer circuit and intermediate frequency (as 10.7MHz), the crystal oscillating circuit that is provided with second frequency changer circuit between frequency-discriminating circuit and is connected with second frequency changer circuit.Improve the selectivity of equipment by the double conversion circuit, intermediate-freuqncy signal through intermediate frequency amplification, frequency discrimination, be reduced into the reflector microphone and pick up the audio signal that obtains.
Here, in order to reduce the interference of frequently adjacent or extraneous signal, the single-chip microcomputer of wireless microphone reflector is provided with the tranmitting frequency configuration switch, and the tranmitting frequency configuration switch is provided with two or more tranmitting frequencies and selects the contact.
Embodiment 2: as shown in Figure 3, Figure 4, present embodiment is to transform the wireless microphone receiver into main control device on the basis of embodiment 1, the wireless microphone reflector transforms into from control equipment, infrared emission circuit on the wireless microphone reflector is replaced with infrared receiving circuit, and the infrared receiving circuit on the corresponding wireless microphone receiver replaces with the infrared emission circuit.Like this, can be in advance on the wireless microphone receiver setpoint frequency coding decide the operating frequency of wireless microphone reflector, wireless microphone receiver.Because generally speaking, the wireless microphone receiver is fixed in the zone and uses, and the wireless microphone reflector can use in a plurality of zones, decide the operating frequency of wireless microphone reflector, wireless microphone receiver by the frequency preset on the wireless microphone receiver, can more effectively avoid the phase mutual interference of the extraneous signal of telecommunication.
Here, for convenience of the operating frequency of Field adjustment wireless microphone receiver, the wireless microphone receiver is provided with the receive frequency coding circuit.
Claims (7)
1, a kind of VHF-UHF wireless microphone, comprise the wireless microphone reflector, the wireless microphone receiver, it is characterized in that the wireless microphone reflector is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit and infrared emission circuit or infrared receiving circuit, microphone, the audio amplifier circuit that microphone and oscillating circuit are connected together, the radio frequency amplifying circuit that is communicated with FM circuit, the transmitting antenna that is communicated with radio frequency amplifying circuit constitutes, and the wireless microphone receiver is mainly by single-chip microcomputer, by monolithic processor controlled oscillating circuit, by monolithic processor controlled and with the infrared emission circuit or the corresponding infrared receiving circuit or the infrared emission circuit of infrared receiving circuit of wireless microphone reflector, reception antenna, the radio frequency amplifying circuit that is communicated with reception antenna, the frequency changer circuit that is communicated with radio frequency amplifying circuit and oscillating circuit respectively, the intermediate frequency that is communicated with frequency changer circuit amplifies, frequency-discriminating circuit, amplify with intermediate frequency, the audio frequency output that frequency-discriminating circuit is communicated with constitutes.
2, VHF-UHF wireless microphone according to claim 1 is characterized in that being communicated with the infrared emission circuit on the single-chip microcomputer of wireless microphone reflector, is communicated with infrared receiving circuit on the single-chip microcomputer of wireless microphone receiver.
3, VHF-UHF wireless microphone according to claim 2, the single-chip microcomputer that it is characterized in that the wireless microphone reflector is provided with the tranmitting frequency configuration switch, and the tranmitting frequency configuration switch is provided with two or more tranmitting frequencies and selects the contact.
4, VHF-UHF wireless microphone according to claim 1 is characterized in that being communicated with infrared receiving circuit on the single-chip microcomputer of wireless microphone reflector, is communicated with the infrared emission circuit on the single-chip microcomputer of wireless microphone receiver.
5, VHF-UHF wireless microphone according to claim 4 is characterized in that the wireless microphone receiver is provided with the receive frequency coding circuit.
6, according to claim 1 or 2 or 4 described VHF-UHF wireless microphones, it is characterized in that oscillating circuit mainly is made of phase-locked loop frequency combiner circuit, the Voltage-Controlled oscillation circuit that is connected with the phase-locked loop frequency combiner circuit, the phase-locked loop frequency combiner circuit is connected with single-chip microcomputer, and Voltage-Controlled oscillation circuit is connected with frequency changer circuit or radio frequency amplifying circuit.
7, according to claim 1 or 2 or 4 described VHF-UHF wireless microphones, the crystal oscillating circuit that it is characterized in that amplifying with intermediate frequency, is provided with second frequency changer circuit and is connected between frequency-discriminating circuit with second frequency changer circuit at first frequency changer circuit of wireless microphone receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101022456A CN100512024C (en) | 2005-12-07 | 2005-12-07 | VHF-UHF wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101022456A CN100512024C (en) | 2005-12-07 | 2005-12-07 | VHF-UHF wireless microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808913A true CN1808913A (en) | 2006-07-26 |
| CN100512024C CN100512024C (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101022456A Expired - Fee Related CN100512024C (en) | 2005-12-07 | 2005-12-07 | VHF-UHF wireless microphone |
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| Country | Link |
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| CN (1) | CN100512024C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142861A (en) * | 2011-01-17 | 2011-08-03 | 厦门亿联网络技术有限公司 | Frequency hopping method and device suitable for wireless voice communication of 2.4GHz industrial scientific medical (ISM) band |
| CN103731767A (en) * | 2013-12-13 | 2014-04-16 | 恩平市上格电子有限公司 | Wireless microphone system based on digital pilot frequency and working method thereof |
| CN109951234A (en) * | 2019-03-07 | 2019-06-28 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable channel number setting control circuit and its setting method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107396217A (en) * | 2017-05-11 | 2017-11-24 | 博兴电子（恩平）有限公司 | A kind of wireless microphone reception device |
-
2005
- 2005-12-07 CN CNB2005101022456A patent/CN100512024C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142861A (en) * | 2011-01-17 | 2011-08-03 | 厦门亿联网络技术有限公司 | Frequency hopping method and device suitable for wireless voice communication of 2.4GHz industrial scientific medical (ISM) band |
| CN102142861B (en) * | 2011-01-17 | 2013-07-10 | 厦门亿联网络技术股份有限公司 | Frequency hopping method and device suitable for wireless voice communication of 2.4GHz industrial scientific medical (ISM) band |
| CN103731767A (en) * | 2013-12-13 | 2014-04-16 | 恩平市上格电子有限公司 | Wireless microphone system based on digital pilot frequency and working method thereof |
| CN109951234A (en) * | 2019-03-07 | 2019-06-28 | 苏州市高事达信息科技股份有限公司 | A kind of electric adjustable channel number setting control circuit and its setting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100512024C (en) | 2009-07-08 |
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Granted publication date: 20090708 Termination date: 20111207 |