KR101914287B1 - Wireless Microphone system to be controlled by the battery charger - Google Patents

Abstract

Disclosed is a charger control wireless microphone system. The charger control wireless microphone system comprises a charger which transmits an RF signal including an FM modulated voice signal from a transmitter of a wireless microphone through a frequency channel of 900 MHz band [925-937.5 MHz 78 channel (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth)], performs FM demodulation on the voice signal in a receiver to adjust amplification attenuation of a specific frequency for the FM demodulated voice signal according to a predetermined volume level and an equalizer level, amplifies the frequency adjusted voice signal to output the amplified voice signal through a speaker, mounts the transmitter of the wireless microphone on a charger to charge a battery of the transmitter, sets a channel of the wireless microphone through wired communication from the charger to a receiver in contrast to an existing charger, and displays volume and equalizer adjustment functions and setting information of the receiver, thereby conveniently adjusting all functions of the receiver placed in a place in which a music instrument or an audio amplifier is installed (in a closet or a ceiling that is not visible) in a lecture room, a church, a karaoke by adjusting the charger installed in the outside.

Description

[0001] The present invention relates to a wireless microphone system,

The present invention relates to a charger-controlled wireless microphone system, and more particularly, to a charger-controlled wireless microphone system in which an RF signal including an FM-modulated voice signal is transmitted from a transmitter of a wireless microphone to a 900 MHz band [925-937.5 MHz 78 channels (160 kHz bandwidth) 200 kHz bandwidth)] to the receiver, and the receiver FM demodulates the demodulated voice signal to adjust the amplification attenuation of the specific frequency according to the predetermined volume level and the equalizer level, and adjusts the frequency-adjusted voice signal Unlike the conventional charger, it sets the channel of the wireless microphone through the wired communication from the charger to the receiver, and adjusts the reception sensitivity and the volume. An equalizer adjusting function and a charger for displaying setting information of the receiver, It relates to an electrical control wireless microphone system.

Conventional 2.4GHz wireless microphones have limited transmission distances of up to 10 ~ 15m in the open space for small power (10mW maximum output) and short range wireless communication, and are mainly used in the industry-sciencemedical (ISM) band of the 2.4GHz band , The battery shortage of the wireless microphone transmitter, or the presence of other indoor and nearby wireless devices, the actual usable distance is very limited due to crosstalk and noise.

When a user moves and uses a 2.4GHz wireless microphone, if the user deviates from a distance of 10 ~ 15m, the wireless connection between the wireless transmitter and the receiver is cut off and communication is interrupted. In this case, it takes several seconds to several tens of seconds for the transmitter and the receiver to re-communicate after returning to the usable area.

As a related art 1, Patent Registration No. 10-15248010000 discloses a "microphone radio receiver, a microphone radio transmitter, and a microphone radio system including them ".

FIG. 1 is a block diagram of a conventional microphone radio transmitter, and FIG. 2 is a block diagram of a conventional microphone radio receiver.

The microphone radio transmitter 100 includes an auto torque switch 101, processing circuits 102, 103, 104 and 106, a baseband processor 105, an RF transmission amplifier 107, a diversity antenna 108, An amplifier 109, an LCD and a notification function module 110, a button input module 111, and a battery and charging module 112.

The auto torque switch 101 may control the power of the microphone radio transmitter 100 according to the control signals (the on-control signal or the off-control signal) transmitted from the microphone radio receiver 200. The auto torque switch 101 turns on the power of the microphone radio transmitter 100 in response to the on-control signal transmitted from the microphone radio receiver 200 and outputs the off-control signal transmitted from the microphone radio receiver 200 And can turn off the power of the microphone radio transmitter 100 in response.

The power of the microphone radio transmitter 100 can be remotely controlled under the control of the microphone radio receiver 200 by applying the auto-torque function to the microphone radio transmitter 100 and the microphone radio receiver 200, respectively.

When the auto talk switch 101 powers on the microphone radio transmitter 100 in response to the on-control signal transmitted from the microphone radio receiver 200, the microphone radio transmitter 100 and the microphone radio receiver 200 And the microphone radio receiver 200 transmits the auto torque-on data signal to the microphone radio transmitter 100 at predetermined intervals, thereby making it possible to perform a wireless connection in a shortest time in the case of a data error due to surrounding environment factors And prevent the disconnection of business continuity.

The processing circuits 102, 103, 104 and 106 include an audio input module 102, an audio amplifier 103, an audio codec 104, and an RF transceiver 106.

The processing circuits 102, 103, 104, and 106 process the initial audio signal (audible frequency range, 20 Hz to 20 KHz) input from the outside under the control of the baseband processor 105, To the transmission amplifier (107).

The audio input module 102 can receive an initial audio signal of an analog type input from the outside.

The audio amplifier 103 may filter and amplify the initial audio signal to a signal having a constant frequency bandwidth. For example, the audio amplifier 103 may filter the initial audio signal within a range of 200 Hz to 14 KHz, but is not limited thereto.

The audio codec 104 may convert the amplified initial audio signal into a digital signal. For example, the audio codec 104 may convert an initial audio signal amplified at a sampling rate of 24 bits / 44.1 KHz to a digital signal, but the present invention is not limited thereto.

The baseband processor 105 can encode the digital signal converted by the audio codec 104 and convert the digital signal into a radio frequency form by lossless compression.

The baseband processor 105 includes an auto talk switch 101, processing circuits 102, 103, 104 and 106, an RF transmit amplifier 107, a diversity antenna 108, an RF receive amplifier 109, The notification function module 110, the button input module 111, and the battery and charging module 112. [

The baseband processor 105 controls the amplification level of the RF transmission and reception amplifiers 104 and 105 through audio mute processing, transmission data error recovery and random code generation for transmission and reception synchronization, frequency hopping wireless protocol control, reception sensitivity detection, Output control, and signal processing functions.

The baseband processor 105 may adjust the output of the RF transmit amplifier 107 in accordance with a received signal strength indication (RSSI) packet transmitted from the microphone radio receiver 200. [ The baseband processor 105 may reduce battery consumption of the microphone radio transmitter 100 by adjusting the output of the RF transmit amplifier 107 according to the strength of the signal transmitted from the microphone radio receiver 200. [ At this time, the baseband processor 105 can adjust the output of the RF transmission amplifier 107 step by step according to the intensity of the signal transmitted from the microphone radio receiver 200.

The RF transceiver 106 may generate a digital signal and a transmission frequency that are converted into a radio frequency form, and may mix the transmission frequency with a digital signal of the radio frequency form.

The RF transmission amplifier 107 may amplify the mixed transmission frequency to a specific output level. According to an embodiment, the maximum output of the RF transmit amplifier 107 may be 23 dBm.

The diversity antenna 108 is connected to the RF transmission amplifier 107 and the RF reception amplifier 109 and is capable of outputting the transmission frequency amplified by the RF transmission amplifier 107 to the microphone radio receiver 200.

The RF receiving amplifier 109 can receive and amplify the on-control signal or the off-control signal transmitted from the microphone radio receiver 200. [ According to the embodiment, the RF receive amplifier 109 can amplify the signal with a gain value of 25 dB.

The LCD and alert function module 110 may be configured to display a current state of the microphone radio transmitter 100 (e.g., a battery state) and a third step (e.g., Vibration, sound, and silence). For example, the microphone radio transmitter 100 incorporates a vibration motor, and the user can easily confirm the display function of the microphone radio transmitter 100, such as deviation of the battery state and the communicable area, from the vibration.

The button input module 111 can control the microphone radio transmitter 100 by the user inputting a button.

The battery and charging module 112 may provide power for driving the microphone radio transmitter 100 and may charge the microphone radio transmitter 100.

2, the microphone radio receiver 200 includes an auto torque switch 201, an RF transmission amplifier 202, a plurality of diversity antennas 203, an RF receive amplifier 204, processing circuits 205 and 207 208, and 209, a baseband processor 206, a Bluetooth module 210, an NFC module 211, a loop antenna 212, a peripheral device connection module 213, an LCD display module 214, A module 215, and a button input module 216.

The auto-torque switch 201 includes an on-control signal that can remotely turn on and off the auto-torque switch 101 implemented in the microphone radio transmitter 100, An off-control signal can be generated that can wirelessly turn off the switch 101 remotely. That is, the microphone radio receiver 200 can control the power of the microphone radio transmitter 100 remotely by sending control signals to the microphone radio transmitter 100.

The RF transmit amplifier 202 may transmit the on-control signal or the off-control signal to the microphone radio transmitter wirelessly under the control of the baseband processor 206. According to an embodiment, the maximum output of the RF transmit amplifier 202 may be 23 dBm.

Each of the plurality of diversity antennas 203 may receive the intermediate audio signal transmitted from the microphone radio transmitter 100. Each of the plurality of diversity antennas 203 performs a function of minimizing a high-frequency fading effect of the intermediate audio signal transmitted from the microphone radio transmitter 100.

The RF receiving amplifier 204 may amplify the intermediate audio signal output from each of the plurality of diversity antennas 203 and output the amplified intermediate audio signal. According to an embodiment, the RF receive amplifier 204 may amplify the signal with a gain value of 25 dB.

The processing circuits 205, 207, 208 and 209 include an RF transceiver 205, an audio codec 207, an audio amplifier 208 and an audio input and output module 209. The processing circuits 205, 207, 208, and 209 may process the amplified intermediate audio signal output from the RF receive amplifier 204.

The RF transceiver 205 may demodulate (or convert) the amplified intermediate audio signal in a form of a frequency that can be processed by the baseband processor 206 in the RF receiving amplifier 204.

The baseband processor 206 can inverse encrypt the decompressed (or translated) data, decompress and transmit the decompressed audio signal to the audio codec 207.

The baseband processor 206 includes an auto talk switch 201, an RF transmit amplifier 202, a plurality of diversity antennas 203, an RF receive amplifier 204, processing circuits 205, 207, 208, and 209, The Bluetooth module 210, the NFC module 211, the peripheral device connection module 213, the LCD display module 214, the battery and charging module 215, and the button input module 216. The baseband processor 206 controls the amplification level of the RF transmission and reception amplifiers 202 and 204 through audio mute processing, transmission data error recovery and random code generation for transmission and reception synchronization, frequency hopping radio protocol control, reception sensitivity detection, Output control, signal processing, and the like.

The baseband processor 206 may adjust the output of the RF transmit amplifier 202 according to the RSSI packet transmitted from the microphone radio transmitter 100. The baseband processor 206 may reduce battery consumption of the microphone radio receiver 200 by adjusting the output of the RF transmit amplifier 202 according to the strength of the signal transmitted from the microphone radio transmitter 100. [ At this time, the baseband processor 206 can adjust the output of the RF transmission amplifier 202 in stages according to the intensity of the signal transmitted from the microphone radio transmitter 100.

However, it is necessary to connect the audio output to the audio player (Audio AMP) after the operation of the channel, volume, reception sensitivity setting, etc. when the conventional wireless microphone is installed in the actual karaoke etc. for the first time, If you try to readjust the receiver for other problems during karaoke operation, it is troublesome to adjust the receiver placed in the closet or on the ceiling.

Patent Registration No. 10-15248010000 (registered May 26, 2015), "Microphone Wireless Receiver, Microphone Wireless Transmitter, and Microphone Wireless System Including These" Patent Registration No. 10-08560020000 (registered on August 27, 2008), "Multitone signal wireless microphone system", DigitalComm Inc. Patent Registration No. 10-06921760000 (registered on March 02, 2007), "Wireless Microphone Transmitter / Receiver", DigitalComm Inc.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the problems of the prior art by providing an RF signal including an FM-modulated voice signal from a transmitter of a wireless microphone in a 900 MHz band (925-937.5 MHz 78 channels (160 kHz bandwidth) ], And the receiver FM demodulates the demodulated voice signal to adjust the amplification attenuation of the specific frequency according to the predetermined volume level and the equalizer level, amplifies the frequency-adjusted voice signal, And the transmitter of the wireless microphone is stored in the charger to charge the battery of the transmitter. Unlike the conventional charger, the charger of the present invention sets the channel of the wireless microphone through the wired communication to the receiver, And a charger for displaying an equalizer adjustment function and setting information of the receiver, And provides a wireless microphone system.

In addition, all the functions controlled by the receivers in the classrooms, churches, and karaoke rooms are controlled by external chargers, so that they can be conveniently controlled at frequent setting changes.

In order to achieve the object of the present invention, a charger control wireless microphone system includes a wireless microphone for transmitting an RF signal including an FM-modulated voice signal from a transmitter of a wireless microphone to a receiver through a frequency channel of 900 MHz band; And demodulates the demodulated voice signal according to a preset volume level and an equalizer level to amplify the frequency of the specific frequency according to a predetermined volume level and an equalizer level, A receiver for amplifying a frequency-adjusted audio signal and outputting the amplified audio signal to a speaker, and for providing reception sensitivity adjustment, volume adjustment and equalizer adjustment; And a transmitter of at least one wireless microphone is mounted on a charger, the battery of the transmitter of the wireless microphone is charged, the channel of each wireless microphone separated by the frequency channel from the charger to the receiver is set through wired communication, And a charger for displaying reception information and setting information of the receiver,
The charger transmits the channel setting signal, the reception sensitivity adjustment signal, the volume adjustment signal, and the equalizer adjustment signal of the transmitter of the wireless microphone to the receiver to set the frequency channel of the transmitter of each wireless microphone, Equalizer control function is provided.

The charger-controlled wireless microphone system according to the present invention can transmit an RF signal including an FM-modulated voice signal from a transmitter of a wireless microphone to a frequency of 925 MHz to 937.5 MHz (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth) Channel to the receiver, the receiver FM demodulates it, and outputs the demodulated voice signal to the speaker. The transmitter of the wireless microphone is mounted on the charger to charge the battery of the transmitter. Unlike the conventional charger, And a charger for setting the channel of the wireless microphone through wired / wireless communication, and for displaying reception sensitivity, volume control, equalizer adjustment function, and setting information of the receiver,

Unlike the existing charger, the charger of the present invention has the effect of setting the channel of the wireless microphone, adjusting the reception sensitivity of the wireless microphone, adjusting the volume, and adjusting the equalizer.

In addition, all functions that are controlled by the receiver placed in the place where the seminar or audio amplifier (audio enclosure or ceiling) is installed in the classrooms, churches, karaoke rooms, taverns, By adjusting all of the microphone's channel, volume, equalizer, and reception settings, it is now easy to adjust for frequent setting changes.

1 is a block diagram of a conventional microphone radio transmitter.
2 is a block diagram of a conventional microphone radio receiver.
3 is a block diagram of a charger control wireless microphone system according to the present invention.
4A, 4B and 4C are block diagrams of a transmitter, a receiver, and a charger of a wireless microphone according to an embodiment of the present invention.
5 is a photograph of two transmitters of a wireless microphone, a receiver, a charger and accessories (one charger adapter - DC5V 1.5A 1ea, one receiver adapter DC 12V 1A 1ea, audio extension cable, one charger bracket).
6 is a diagram showing a name and a function of a transmitter of a wireless microphone.
7A and 7B are views showing the names and functions of receivers.
8 is a view showing the name and function of the charger.
9 is a diagram illustrating a method of using a wireless microphone system including two wireless microphones, a receiver, an amplifier, and two speakers.
10 is a diagram showing a channel table in which frequencies according to channel numbers of two wireless microphones MIC1 and MIC2 are displayed.
11 is a diagram showing specifications of a transmitter and a receiver.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a charger control wireless microphone system according to the present invention.

The charger-controlled wireless microphone system of the present invention can transmit an RF signal including an FM-modulated voice signal from a transmitter of a wireless microphone 700 to a 900 MHz band (925 to 937.5 MHz 78 channels (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth) To the receiver 800 through the frequency channel of the receiver 800 and demodulates the demodulated voice signal by the receiver 800 to adjust the amplification attenuation of the specific frequency according to the predetermined volume level and the equalizer level, Amplifies the signal and outputs the amplified signal to the audio output unit (mono or stereo speaker) of the receiver. The transmitter of at least one wireless microphone 700 is mounted on the charger to charge the battery of the transmitter. 900 to the receiver 800 through wired communication, sets the channel of the wireless microphone to the reception sensitivity control of the wireless microphone, Includes a charger 900 for display control and setting information of the equalizer control and the receiver,

The charger 900 transmits a channel setting signal, a reception sensitivity adjustment signal, a volume adjustment signal, and an equalizer adjustment signal of a transmitter of a wireless microphone identified as a frequency channel to the receiver 800, A frequency channel setting unit, a volume adjusting unit, and an equalizer adjusting function, and sets a channel of each wireless microphone.

In addition, all functions that are controlled by the receiver placed in the place where the seminar or audio amplifier (audio enclosure or ceiling) is installed in the classrooms, churches, karaoke rooms, taverns, By adjusting all of the microphone's channel, volume, equalizer, and reception settings, it is now easy to adjust for frequent setting changes.

The charger control wireless microphone system according to the present invention

An RF signal including an FM-modulated voice signal from a transmitter of the wireless microphone 700 is transmitted to a receiver through a frequency channel of 900 MHz band (925 to 937.5 MHz 78 channels (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth per channel) A wireless microphone 700;

The transmitter of the wireless microphone receives an RF signal including an FM-modulated voice signal through a 900-MHz frequency channel and performs FM demodulation to demodulate the demodulated voice signal according to a predetermined volume level and an equalizer level to attenuate a specific frequency A receiver 800 that amplifies a frequency-adjusted voice signal and outputs the amplified voice signal to a speaker, and adjusts reception sensitivity, volume, and an equalizer; And

A wireless microphone 700 is mounted to charge the battery of the transmitter of the wireless microphone 700 and sets a channel of each wireless microphone classified as a frequency channel through wired communication from the charger to the receiver 800, A charger 900 for controlling the sensitivity, the volume, the equalizer, and setting information of the receiver,

The charger 900 transmits a channel setting signal, a reception sensitivity adjustment signal, a volume adjustment signal, and an equalizer adjustment signal of the transmitter of the wireless microphone to the receiver 800 to set and transmit the frequency channel of the transmitter of each wireless microphone 700 , Reception sensitivity adjustment, volume adjustment, and equalizer adjustment.

The FM modulated RF signal is transmitted from the transmitter of the wireless microphone 700 to the receiver 800 through a frequency channel of 900 MHz band.

For example, the 900 MHz band uses the 925-937.5 MHz band and uses 78 channels (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth per channel).

The wireless microphone 700 includes a power on / off button, a microphone unit, a display unit, a transmitter, an antenna (ANT), and a bottom charging unit, and has a DC power of 5V and an RF output of 10mW.

4A, 4B and 4C are block diagrams of a transmitter, a receiver, and a charger of a wireless microphone according to an embodiment of the present invention.

4A is an internal configuration diagram of a transmitter of a wireless microphone.

An RF signal containing an FM-modulated voice signal from a transmitter of a wireless microphone is transmitted to the receiver over a frequency channel of 900 MHz band [925-937.5 MHz 78 channels (160 kHz bandwidth per channel) or 60 channels (200 kHz bandwidth)].

Referring to FIG. 4B, the receiver is configured as follows.

The receiver 800 is connected to the CPU and includes a power ON / OFF button, a channel setting unit of the transmitter of the wireless microphone, a LOCK / UNLOCK switch, a reception sensitivity adjusting switch, two volume control units, an equalizer control unit, A link status confirmation LED, a CPU, a display unit for indicating a state of charge and displaying a frequency channel of a transmitter of each wireless microphone set, an audio amplifier, two audio output terminals connected to two speakers, and a wired communication unit.

1. Antenna: It serves as an antenna of RF signal receiver which receives FM-modulated voice signal from a transmitter of wireless microphone to a predetermined frequency channel of 900MHz band.

2. Band select filter: It is connected to the antenna 1 and provides band pass filtering so that only a desired frequency band can be amplified.

3. Low Noise Amplifier (LNA): Connected to the band selection filter (2), it suppresses amplification to noise and amplifies the signal.

4. Image Reject Filter: In the low noise amplifier (LNA) 3, one of the amplified signals is band-pass filtered again to prevent transmission of the lethal image frequency to the mixer, , Separating the RF stage and the IF stage to improve the stability of the receiver.

5. RF down mixer (RF -> IF downconversion mixer): Connects to the image rejection filter (4) and downconverts the low noise amplified RF signal to the IF band.

6. RF local oscillator (RF LO): The RF down mixer (5) can supply the LO frequency for frequency synthesis and change the LO frequency to select the channel.

7. Phase locked loop (PLL) IC: It locks the output frequency of the RF local oscillator (RF LO) so that it can be fixed at a constant frequency without shaking, and also controls the RF local oscillator (RF LO) to adjust the voltage of the VCO (Voltage Controlled Oscillator) to move and fix the RF LO output frequency to the desired frequency.

8. IF amplifier: amplifies the IF signal provided from the RF down mixer (5).

9. Channel select filter: A filter that is connected to the IF amplifier 8 and selects only a desired channel by band-pass filtering.

10. First IF amplifier (1 ^st IF amplifier): Connected to the channel selection filter (9), amplifies the IF signal.

11. IF down mixer (IF - > baseband down-conversion mixer): Connects to the first IF amplifier 10 and performs down-conversion mix again to convert it to a baseband which is the frequency band containing the original signal.

12. IF local oscillator (IF LO): Provides the LO frequency to the IF down mixer (11) for converting the IF signal to 10.7MHz

13. Channel select filter: A filter for band-pass filtering and selecting only a desired channel from a signal provided from an IF down mixer 11.

14. Second IF amplifier (2nd IF amplifier): Connected to the channel selection filter 13, performs a significant amount of signal amplification through the IF amp after channel filtering.

15. Demodulator: demodulates the received FM signal.

16. Audio Switch: Connected to the demodulator 15, connected to the CPU 13, and controlling audio on / off.

17. Audio Amp: Connected to the audio switch (16), amplifies the demodulated audio signal according to the set audio volume level,

18. Audio filter: Connected to the audio amplifier 17, which filters the amplified audio signal.

19. Expander: This circuit is connected to the audio filter 18 and restores the audio signal compiled by the transmitter of the wireless microphone to the original audio signal.

20. EQ Equalizer: Connects to the expander (19) and adjusts the equalizer level for each frequency band of the original audio signal.

21. Audio Switch: An audio switch connected to the EQ equalizer 20 and providing an audio signal whose equalizer level is adjusted to the audio output terminal 22.

22. Audio Output Connector: Connects to audio switch and outputs audio signal.

23. CPU: Connected to channel setting section (not shown) and audio volume controller (not shown), connected to PLL IC (7), and set desired RF-LOCAL by controlling PLL according to the set channel.

24. Display: Connected to the CPU 23, it displays the currently set channel, audio volume level, EQ setting, channel, reception sensitivity setting, and transmitter link status.

25. Data Communication Terminal: Data communication terminal which is connected to the CPU 23 and sends receiver current status information to the charger and receives changed receiver status information from the charger.

The receiver 800 is connected to the CPU and includes a power on / off button input unit;

A LOCK / UNLOCK switch connected to the CPU for setting a frequency channel of a transmitter of each wireless microphone in a LOCK state and a frequency channel of a transmitter of each wireless microphone in an UNLOCK state;

A transmitter connected to the CPU for indicating an RF channel connection state with the transmitter of the wireless microphone and a link status confirmation LED;

A reception sensitivity control switch connected to the CPU and adjusting a sensitivity (-88 dBm) of a signal received from each wireless microphone;

And receives the channel setting signal of the transmitter of the wireless microphone, the volume control signal of the wireless microphone, the equalizer adjustment signal, and the reception sensitivity signal from the charger, and is connected to the data communication terminal 908 of the charger 900 A wired communication unit for transmitting and receiving data through a telephone line (Tx, Rx, GND) or a data cable;

Two volume controllers connected to the CPU and providing a volume control signal of the wireless microphone; And

Further comprising an equalizer adjuster connected to the CPU for adjusting the level of a voice signal of each of the wireless microphones (MIC1, MIC2) identified by a frequency channel to provide an equalizer adjustment signal,

And a mono or dual audio output unit (speaker) connected to the audio output terminal and outputting the amplified audio signal provided from the audio amplifier.

The receiver 800 is connected to the CPU and receives a channel setting signal of a transmitter of a wireless microphone, a volume adjusting signal of a wireless microphone, an equalizer adjusting signal, and a receiving sensitivity setting signal from the charger via Bluetooth or Wi-Fi And may further include a communication unit.

4C is a configuration diagram of the charger.

The charging unit includes a power input unit 901, a charging unit 902, a charging terminal 903, an IR receiving unit 904, a control key 905, a display unit 906, a charger control unit 907, and a data communication terminal 908. [ .

The power input unit 901 receives an external DC voltage and supplies a voltage to the charger circuit.

The charging unit 902 turns on / off the voltage supplied from the power input unit 901 to the charging terminal under the control of the control unit 907 by placing at least one wireless microphone (MIC1, MIC2) Allow the battery to charge.

When at least one wireless microphone (MIC1, MIC2) having a built-in battery is connected to the charging terminal, the charging terminal 903 changes the set basic voltage of the charging terminal. The charger controller 907 controls the charge terminal After the voltage change is determined, the control switch of the charger is turned on, and at this time, the voltage received from the charger is transmitted to the external microphone inserted into the charging terminal of the charger through the charging terminal.

The IR receiving unit 904 receives the control data of the charger through the external IR remote controller.

The control key 905 controls the function of the charger through the KEY button on the charger.

The display unit 906 displays the status information of the charger and the status information of the receiver, and displays the frequency channel, the depth of the water, and the volume level of the transmitter of the set wireless microphones MIC1 and MIC2.

The charger controller 907 determines the state of the charger 900 and transmits DATA to the display unit. The changed data is transmitted to the display unit 906 through the control data received from the control key 905 and the IR receiving unit 904 and the charging unit 902 can be controlled to turn ON / And transmits and receives the status information of the receiver through the data communication terminal 908.

The LOCK / UNLOCK switch is connected to the charger control unit. In the LOCK state, the frequency channel of each wireless microphone transmitter can not be set. In the UNLOCK state, the frequency channel of each wireless microphone transmitter is set.

The channel setting unit of the transmitter is connected to the charger control unit, and sets the frequency channel of the transmitter of each wireless microphone.

The data communication terminal 908 communicates with the wired communication unit of the receiver 800 to receive status information of the receiver and transmits the status information to the charger control unit. The receiver transmits the channel setting signal of the transmitter of the wireless microphone identified as a frequency channel, And transmits the changed state information of the receiver received from the charger control unit 907 to the receiver through a telephone line (Tx, Rx, GND) or a data cable.

The charger 900 further includes a volume controller (not shown) connected to the charger controller 907 and adapted to adjust the volume control signal at the receiver for the voice signal of each wireless microphone.

The charger 900 is connected to a charger controller 907 and further includes an equalizer controller (not shown) for adjusting the equalizer adjustment signal for each frequency band in a receiver for a voice signal of each wireless microphone.

The charger 900 includes a power on / off button 910; A charger control unit 907; A channel setting unit 920 of a transmitter of a wireless microphone connected to the charger control unit 907 and setting a frequency channel of the transmitter of the wireless microphone; Volume control units 930 and 931 connected to the charger control unit 907 and adjusting the volume of audio output signals of the two wireless microphones; In the LOCK state, the frequency channels of the transmitters of the respective wireless microphones 700 can not be set. In the UNLOCK state, the LOCK / UNLOCK switch 932; A charging unit 902 having at least one wireless microphone (MIC1, MIC2), at least one mounting unit 941, 942, and charging the battery of the wireless microphone through each charging terminal provided at the lower end; A display unit 906 for displaying the status information of the charger and the status information of the receiver and displaying the frequency channels of the transmitters of the respective wireless microphones; And a data communication terminal 908 for transmitting through a wired cable through a telephone line (Tx, Rx, GND) or a data cable.

The charger control unit 907 determines the status of the charger and transmits status data to the display unit, transmits the changed data to the display unit through the control key and the control data received from the IR receiving unit, The charging function of each wireless microphone, the frequency channel setting signal of the transmitter, the volume adjusting signal and the equalizer adjusting signal are transmitted through the data communication terminal, and the data communication terminal So that status information of the receiver is transmitted and received.

The LOCK / UNLOCK switch 932 is connected to the charger control unit 907. In the LOCK state, the frequency channel of the transmitter of each wireless microphone 700 can not be set. In the UNLOCK state, Of the frequency channel. For example, when the switch button is moved to the left, it is in the LOCK state, and when the switch button is moved to the right, it is in the UNLOCK state.

The charger 900 further includes volume controllers 930 and 931 connected to the charger controller 907 for adjusting the volume control signals of the receivers for the voice signals of the respective wireless microphones.

The charger 900 further includes an equalizer controller (not shown) connected to the charger controller 907 for adjusting the equalizer adjustment signal for each frequency band of the receiver 800 with respect to a voice signal of each wireless microphone do.

5 is a photograph of two transmitters of a wireless microphone, a receiver, a charger and accessories (one charger adapter - DC5V 1.5A 1ea, one receiver adapter DC 12V 1A 1ea, audio extension cable, one charger bracket).

6 is a diagram showing a name and a function of a transmitter of a wireless microphone.

The transmitter of the wireless microphone includes a ball for protecting the unit which is a device for converting a voice signal into an electric signal; Current channel status (1 ~ 78CH) display and channel display window to show remaining battery level; A power switch to turn the wireless microphone on and off; And a charging terminal to which the microphone and the charger are connected.

7A and 7B are views showing the names and functions of receivers.

* Volume / Channel Knob: Knob switch for adjusting audio volume and receiver channel

* Volume display: Volume change status is indicated by flashing LED

* LINK / CH display: Indicates the connection (operation) and channel setting status between the microphone and the receiver. LED lights up when connecting normally.

* DCOM logo: Every 5 seconds the color changes to light blue - green - purple.

* Sensitivity adjustment volume (MIC1, MIC2): It is used to adjust the reception distance of MIC1, MIC2. When the sensitivity volume is rotated counterclockwise, the receiving distance becomes short. When the sensitivity volume is rotated clockwise, Loses.

* Microphone output integrated terminal (MIC1, MIC2): It is an audio signal output terminal connected to one 1/4 inch phone jack by integrating audio signals of MIC1 and MIC2 respectively, and it is connected to an audio mixer or an amplifier.

* Microphone output terminals (MIC1, MIC2): MIC1, MIC2 Audio signal output terminal connected to each 1/4 inch phone jack. It is used to connect to audio mixer or amplifier.

* BAL port: An audio signal output terminal connected to the transmitter of the wireless microphone and the XLR-type connector jack.

* Power input connector: The power input connector uses DC 12V.

* Power switch: Used to turn the receiver on / off.

* Equalizer control section: You can adjust the tone of the audio signal by 7 bands, for example, according to the user.

8 is a view showing the name and function of the charger.

* Channel and status display: It shows the normal channel status and various patterns are displayed on the display window when the sound is recognized.

* Status display logo: The logo color changes to sky blue - green - yellow - purple. For example, when the microphone is inserted, it turns orange, and when MIC1, MIC2 is full, it turns green.

* CHANGE CHANGE SWITCH: This switch is used to change the charger channel and set the transmitter channel.

* Power input connector: Use DC 5V 1.5A (only).

* Charger Bracket: It is a bracket that can fix the charger to the wall.

9 is a diagram illustrating a method of using a wireless microphone system including two wireless microphones, a receiver, an amplifier, and two speakers.

* How to set receiver channel

1) To set the receiver channel: ① Press the volume control knob for 3 seconds to change to the channel mode.

2) ③ Link logo flickers, and you can change the channel by using the volume control knob.

3) If the channel setting is completed and the knob is not moved for 3 seconds, it will switch to volume control mode.

* How to set the microphone channel of the wireless microphone transmitter (transmitter)

1) Prepare the charger and transmitter to set the channel.

2) Match the channel values using the control buttons on the charger and receiver.

At this time, all the combined channels are installed referring to the table of 78 channels.

3) If you do not press the button for 3 seconds after changing the channel, it returns to the channel fixed mode.

4) Set the channel of the microphone. Press the UP or DOWN button for 3 seconds to flicker the front channel display. Press the UP / DOWN buttons to change the desired channel, then insert the microphone and press the Set (①) key.

When the display states of MIC1 and MIC2 according to the state of the charger are checked, the music patterns are not displayed when the wireless microphones MIC1 and MIC2 are both inserted into the mounting part.

10 is a diagram showing a channel table in which frequencies according to channel numbers of two wireless microphones MIC1 and MIC2 are displayed.

11 is a diagram showing specifications of a transmitter and a receiver.

The charger-controlled wireless microphone system of the present invention can transmit an RF signal including an FM-modulated voice signal transmitted from a transmitter of a wireless microphone 700 to a 900 MHz band (925 to 937.5 MHz 78 channels (160 kHz bandwidth per channel) or 60 channels ) To the receiver 800 and FM demodulates it in the receiver 800 to adjust the amplification attenuation of the specific frequency according to the predetermined volume level and the equalizer level, Amplifies the voice signal and outputs the amplified voice signal to a mono or stereo speaker via an audio output terminal of the receiver. The transmitter of at least one wireless microphone 700 is mounted on the charger to charge the battery of the transmitter of the wireless microphone, The charger 900 of the present invention is provided with a charger for setting the channel of the wireless microphone,

The charger of the present invention is different from the conventional charger in that it has a charger that sets a channel of a wireless microphone and has functions of receiving sensitivity adjustment, volume adjustment and an equalizer adjustment function.

In addition, all functions that are controlled by the receiver placed in the place where the seminar or audio amplifier (audio enclosure or ceiling) is installed in the classrooms, churches, karaoke rooms, taverns, By adjusting all of the microphone's channel, volume, equalizer, and reception settings, it is now easy to adjust for frequent setting changes.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that various modifications and changes may be made without departing from the scope of the present invention.

700: wireless microphone 800: receiver
810: Power on / off button 820: LOCK / UNLOCK switch
830: Volume control unit 840: Transmitter and link status check LED
900: Charger 906: Display unit
910: Power on / off button 920: Channel setting section of the transmitter
930,931: Two volume control units 932: LOCK / UNLOCK switch
941, 942:

Claims (7)

A wireless microphone for transmitting an RF signal including an FM-modulated voice signal from a transmitter of the wireless microphone to a receiver through a frequency channel of 900 MHz band;
An RF demodulator for receiving an RF signal including the FM modulated voice signal through the frequency channel from the transmitter of the wireless microphone and FM demodulating the demodulated voice signal and adjusting amplification attenuation of a specific frequency according to a predetermined volume level and an equalizer level; A receiver for amplifying a frequency-adjusted audio signal and outputting the amplified audio signal to a speaker, and for receiving sensitivity adjustment, volume adjustment and equalizer adjustment; And
A transmitter of at least one wireless microphone is mounted on a charger, the battery of the transmitter of the wireless microphone is charged, the channel of each wireless microphone separated by the frequency channel from the charger to the receiver through wired communication is set, A charger for adjusting the sensitivity, the volume and the equalizer, and the setting information of the receiver,
The charger transmits the channel setting signal, the reception sensitivity adjustment signal, the volume adjustment signal, and the equalizer adjustment signal of the transmitter of the wireless microphone to the receiver to set the frequency channel of the transmitter of each wireless microphone, A charger control wireless microphone system that provides equalizer control. The method according to claim 1,
Modulated RF signal is transmitted from a transmitter of the wireless microphone to a receiver through a frequency channel of 900 MHz band. The 900 MHz band is used at 925 to 937.5 MHz, and 78 channels (160 kHz bandwidth) or 60 channels (200 kHz Bandwidth), charger control wireless microphone system. The method according to claim 1,
The receiver
An antenna (ANT) receiving an FM-modulated voice signal from a transmitter of the wireless microphone to a predetermined frequency channel of 900 MHz band;
A band selection filter connected to the antenna and performing band pass filtering to amplify only a desired frequency band;
A low noise amplifier (LNA) connected to the band selection filter for suppressing amplification of noise and amplifying a signal;
In order to prevent a lethal image frequency from being transmitted to the mixer from the signals amplified by the LNA, it is further subjected to band pass filtering, additionally removing a spurious frequency, separation of an RF stage and an IF stage, Image removal filter;
An RF down-mixer (RF-IF down-conversion mixer) connected to the image rejection filter and down-converting the low-noise amplified RF signal to an IF band;
An RF local oscillator (RF LO) capable of supplying an LO frequency for frequency synthesis to the RF down mixer and selecting a channel by changing an LO frequency;
(VCO) used as a RF local oscillator (RF LO) through a control input to lock the output frequency of the RF local oscillator (RF LO) to be fixed at a constant frequency without shaking, PLL (Phase Locked Loop) IC that adjusts and moves the RF LO output frequency to a desired frequency;
An IF amplifier for amplifying an IF signal provided from the RF down mixer;
A channel selection filter connected to the IF amplifier for band-pass filtering and selecting only a desired channel;
A first IF amplifier connected to the channel selection filter and amplifying an IF signal;
An IF down mixer (IF - > baseband down-conversion mixer) connected to the first IF amplifier and performing down-conversion mixing again to convert the baseband into a frequency band in which the original signal is contained;
An IF local oscillator (IF local oscillator) for supplying the LO frequency to the IF down mixer for converting the IF signal to 10.7 MHz;
A channel selection filter for band-pass filtering and selecting only a desired channel from a signal provided from the IF down mixer;
A second IF amplifier connected to the channel selection filter, for amplifying a significant amount of signal through the IF amplifier after channel filtering;
A demodulator for demodulating the received FM signal;
An audio switch connected to the demodulator, connected to the CPU, for controlling audio on / off;
An audio amplifier connected to the audio switch and amplifying the demodulated audio signal according to a set audio level;
An audio filter connected to the audio amplifier and filtering the amplified audio signal;
An expander connected to the audio filter and restoring a voice signal compiled by a transmitter of the wireless microphone into an original audio signal;
An EQ equalizer connected to the expander for adjusting an equalizer level for each frequency band of the original audio signal;
An audio switch connected to the EQ equalizer and providing an audio signal whose equalizer level is adjusted to an audio output terminal;
An audio output terminal connected to the audio switch;
A CPU connected to the channel setting unit and the two audio volume controllers and connected to the PLL IC and controlling the PLL according to the set channel to set a desired RF-LOCAL;
A display connected to the CPU for displaying a currently set channel, an audio volume level, an EQ setting, a channel, a reception sensitivity setting, and a transmitter link status; And
A data communication terminal, connected to the CPU, for receiving receiver current status information to the charger and receiving changed receiver status information from the charger;
A charger control wireless microphone system. The method of claim 3,
The receiver includes:
A power on / off button input unit connected to the CPU;
A LOCK / UNLOCK switch connected to the CPU for setting a frequency channel of a transmitter of each wireless microphone in a LOCK state and a frequency channel of a transmitter of each wireless microphone in an UNLOCK state;
A transmitter connected to the CPU for indicating an RF channel connection state with the transmitter of the wireless microphone and a link status confirmation LED;
A reception sensitivity control switch connected to the CPU and adjusting a sensitivity (-88 dBm) of a signal received from each wireless microphone;
(Tx, Rx, and Rx) connected to the data communication terminal of the charger, and receiving the channel setting signal of the transmitter of the wireless microphone, the volume control signal of the wireless microphone, the equalizer adjustment signal and the reception sensitivity signal from the charger, GND) or a data cable;
Two volume controllers connected to the CPU and providing a volume control signal of the wireless microphone; And
Further comprising an equalizer adjusting unit connected to the CPU and adjusting the height of each voice signal of each wireless microphone identified by a frequency channel according to a frequency band to provide an equalizer adjusting signal,
And a mono or dual audio output unit (speaker) connected to the audio output terminal and outputting the amplified audio signal provided from the audio amplifier. The method according to claim 1,
The charger
A power on / off button for controlling power on / off of the charger;
A power input unit receiving the external DC voltage and supplying a voltage to the charger circuit;
A charging unit for receiving at least one wireless microphone (MIC1, MIC2) on the mounting portion and for charging the battery of the wireless microphone by turning ON / OFF the voltage supplied from the power input unit to the charging terminal;
At least one charging terminal for transmitting a voltage received from the charging unit to an external microphone mounted on the mounting unit through a charging terminal when a wireless microphone having a battery is connected to each charging terminal from the outside;
An IR receiver for receiving control data of the charger through an external IR remote controller;
A control key for controlling a function of the charger through a KEY button on the charger;
Transmits the DATA to the display unit by determining the state of the charger, transfers the changed data to the display unit through the control key and the control data received from the IR receiver, controls the charging unit according to the state of the charging terminal And a charger control unit for controlling the charging function of each wireless microphone, the frequency channel setting signal, the volume adjusting signal, and the equalizer adjusting signal of the transmitter through the data communication terminal and transmitting / receiving status information of the receiver, ;
A LOCK / UNLOCK switch that is connected to the charger control unit and can not set the frequency channel of the transmitter of each wireless microphone in the LOCK state and sets the frequency channel of the transmitter of each wireless microphone in the UNLOCK state;
A channel setting unit of a transmitter connected to the charger control unit and setting a frequency channel of a transmitter of each wireless microphone;
A display unit for displaying status information of the charger and status information of the receiver and displaying frequency channels, reception sensitivity, and volume level of a transmitter of each wireless microphone set; And
And transmits the channel setting signal, the volume adjusting signal, and the equalizer adjusting signal of the transmitter of the wireless microphone identified as a frequency channel to the receiver, A data communication terminal for transmitting changed status information of the receiver received from the charger control unit to a receiver through a telephone line (Tx, Rx, GND) or a data cable;
A charger control wireless microphone system. 6. The method of claim 5,
The charger
And a volume control unit coupled to the charger control unit and adapted to adjust the volume control signal at a receiver for a voice signal of each wireless microphone. 6. The method of claim 5,
The charger
Further comprising an equalizer controller coupled to the charger controller for adjusting the equalizer adjustment signal for each frequency band in the receiver for the voice signal of each wireless microphone.

Images