KR100910532B1 - Wireless receiver of broadcast system - Google Patents

Abstract

According to an aspect of the present invention, there is provided a wireless reception apparatus for a village broadcasting system, including: a wireless transmission apparatus for transmitting a signal having a predetermined frequency; And one or more wireless receivers receiving the signal of the predetermined frequency. Here, each radio receiver includes an RF receiver for receiving the signal of the predetermined frequency; A signal amplifier for amplifying the signal of the RF receiver; A display unit for outputting the amplified signal to the outside; And a control and power supply unit for supplying power to the RF receiver, the signal amplifier, and the display unit, and controlling their operations. The broadcast system according to the present invention can solve the inconvenience of connecting by wire to each house from a village unit by providing a wireless receiver.

Description

Wireless receiver of village broadcasting system {WIRELESS RECEIVER OF BROADCAST SYSTEM}

The present invention relates to a radio receiver, and more particularly, to a radio receiver of a village-based broadcasting system.

Conventional village broadcasting systems include a wired transmitter and a wired receiver. The wired transmission device is installed in a town hall or the like, and the wired reception device such as a speaker is installed in the center of the town. In the case of an apartment or the like, the wired receiver is installed in each home individually.

In a conventional village unit broadcasting system, broadcasting is performed through a large speaker, so noise and the like may be severe. In addition, when a wired receiving device is individually installed in each home in a place such as an apartment, it is inconvenient to separately wire the wired transmitting device to the wired receiving device in each home.

The present invention has been proposed to solve the above-mentioned problems, and an object of the present invention is to provide a wireless reception apparatus of a village broadcasting system capable of eliminating the inconvenience of wired connection from a transmission apparatus to a reception apparatus in each home. have.

Wireless reception apparatus of the village broadcasting system according to the present invention is a radio transmission apparatus for wirelessly transmitting a frequency signal of 136MHz ~ 172MHz or 216MHz ~ 230MHz band; And one or more wireless receiving devices installed in individual homes, for receiving the frequency signals in the 136 MHz to 172 MHz bands, and for outputting voice signals that can be heard in individual homes using the input frequency signals.

Here, each of the radio receiving apparatus is an RF receiver for receiving a signal of the 136MHz ~ 172MHz or 216MHz ~ 230MHz band frequency, and generates a first output signal; A signal amplifier for amplifying a first output signal of the RF receiver to generate a second output signal; A signal output unit for receiving the second output signal and outputting a third output signal to the outside as the voice signal; And converts AC power into a first or second DC power supply, provides the first DC power to the RF receiver, provides the second DC power to the signal amplifier, and operates the wireless receiver. It includes a control and a power supply for controlling.

Here, the control and power supply unit is an input terminal for receiving the AC power; A transformer for converting primary AC power from said input terminal into secondary AC power; A zener diode connected to both ends of the transformer; A bridge circuit connected to both ends of the transformer for converting the secondary AC power into the second DC power; And a voltage generating circuit for receiving the second DC power and generating the first DC power.

The signal amplifier may include an input terminal for receiving the first output signal; A variable resistor circuit for varying the first output signal; And an amplifier circuit for receiving the output value of the variable resistance circuit and the second DC power and generating the second output signal.

The wireless reception apparatus of the village broadcasting system according to the present invention can solve the inconvenience of connecting by wire from the wireless transmission apparatus to the wireless reception apparatus of each home.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art may easily implement the technical idea of the present invention.

1 is a block diagram illustrating an example of a wireless receiving apparatus of a village broadcasting system according to the present invention. Referring to FIG. 1, the village broadcasting system includes a wireless transmitter 100 and a plurality of wireless receivers 200 to 300.

The wireless transmitting device 100 transmits a signal of a predetermined frequency to the plurality of wireless receiving devices 200 to 300. The wireless transmission device 100 may transmit a voice signal such as music or a voice. When transmitting a voice signal, the wireless transmitter 100 transmits a frequency of a predetermined band (for example, 136MHz ~ 172MHz, 216MHz ~ 230MHz, 400MHz ~ 472MHz). The wireless transmission apparatus 100 may transmit not only an audio signal but also an image signal. The wireless transmission apparatus 100 may be fixedly used at one location and may transmit audio or video signals (hereinafter, referred to as audio signals) while moving from place to place.

The plurality of radio receivers 200 to 300 receive a voice signal transmitted from the radio transmitter 100. As shown in Fig. 1, each radio receiver has the same configuration and principle of operation. Hereinafter, one wireless receiver 200 will be described.

The wireless reception device 200 is installed in individual homes in village units. The wireless receiver 200 receives a frequency band signal (for example, 136 MHz to 172 MHz, 216 MHz to 230 MHz, and 400 MHz to 472 MHz) and receives a voice signal that can be viewed or heard in an individual home using the input frequency signal. Output Referring to FIG. 1, the wireless reception device 200 receives a voice signal and the like through the antenna 201. The wireless receiver 200 includes an RF receiver 210, a signal amplifier 220, a signal output unit 230, and a control and power supply unit 240.

The input voice signal is input to the RF receiver 210 through the antenna 201. The RF receiver 210 transmits the input voice signal to the signal amplifier 220 in response to the control of the control and power supply 240. The RF receiver 210 operates by receiving a DC voltage (for example, 6V) from the control and power supply 240. The RF receiver 210 receives a frequency band signal (for example, 136 MHz to 172 MHz, 216 MHz to 230 MHz, and 400 MHz to 472 MHz) and generates a first output signal of about 1 W.

The signal amplifier 220 amplifies the first output signal input from the RF receiver 210 to generate a second output signal. For example, the signal amplifier 220 amplifies the first output signal of about 1W, and generates a second output signal of about 22W. The signal amplifier 220 operates by receiving a DC voltage (for example, 12V) from the control and power supply 240. An internal configuration and operation of the signal amplifier 220 will be described in detail with reference to FIG. 3.

The signal output unit 230 outputs the amplified voice signal to the outside. The signal output unit 230 may be an audio display device or an image display device according to a signal input to the wireless reception device 200. If the input signal is an audio signal, it is an audio display device such as a speaker. If the input signal is an audio signal, it is an image display device such as a display. For example, the signal output unit 230 receives a second output signal of about 22W and outputs a third output signal of about 50W to the outside as a voice signal.

The control and power supply unit 240 receives an AC voltage (for example, 220V) and converts it into a DC voltage. The control and power supply unit 240 provides the converted DC voltage to the RF receiver 210, the signal amplifier 220, and the signal output unit 230, and controls their operations. For example, the control and power supply unit 240 receives an AC voltage of about 220V and converts it into a first DC voltage of about 6V and a second DC voltage of about 12V. The first DC voltage is provided to the RF receiver 210, and the second DC voltage is provided to the signal amplifier 220. Voltage conversion and generation of the control and power supply unit 240 is described in detail with reference to FIG.

FIG. 2 is a block diagram illustrating an example of the control and power unit shown in FIG. 1. Referring to FIG. 2, the control and power supply unit 240 includes an input terminal, a transformer 241, a zener diode (ZNR), a bridge circuit 243, a capacitor C, and a voltage generator circuit 245.

The input terminal receives an AC voltage of about 220V. Transformer 241 is connected to both ends of the input terminal. The transformer 241 receives the primary AC voltage from the input terminal and converts the secondary AC voltage to the secondary AC voltage. A zener diode ZNR is connected between both ends of the transformer 241. The bridge circuit 243 is connected to both ends of the transformer 241, and is connected in parallel with the zener diode ZNR. The bridge circuit 243 converts the secondary AC voltage into a second DC voltage of about 12V. The second DC voltage is provided to the signal amplifier 220.

A capacitor C is connected between the output terminal of the bridge circuit 243 and the ground terminal. The voltage generation circuit 245 is connected to the output terminal of the bridge circuit 243, receives a second DC voltage of about 12V, and generates a first DC voltage of about 6V. The first DC voltage is provided to the RF receiver 210.

The control and power supply unit 240 shown in FIG. 2 receives an AC voltage of about 220V and generates a first DC voltage of about 6V and a second DC voltage of about 12V. The first DC voltage is provided to the RF receiver 210, and the second DC voltage is provided to the signal amplifier 220.

3 is a block diagram illustrating an example of the signal amplifier illustrated in FIG. 1. The signal amplifier 220 includes an input terminal AMP_IN, a variable resistor circuit 221, and an amplifier circuit 223.

The input terminal AMP_IN receives a first output signal of about 1 W from the RF receiver 210. The variable resistor circuit 221 includes a variable resistor VR and a resistor R. The variable resistor circuit 221 receives the first output signal and divides the voltage using the variable resistor VR and the resistor R. The divided voltage of the variable resistor circuit 221 is provided to the amplifier circuit 223. The amplifier circuit 223 operates by receiving a second DC voltage of about 12V. The amplifier circuit 223 receives the divided voltage and generates a second output signal of about 22W.

The radio reception apparatus of the broadcasting system according to the present invention can be efficiently used at a village level. Conventional village-based broadcasting system has a inconvenience in that a speaker or the like is attached to each home and a wired connection is made in a town hall. However, the radio receiver of the broadcasting system according to the present invention has a radio receiver in each house, and each house by using a frequency of a predetermined band (for example, 136 MHz to 172 MHz, 216 MHz to 230 MHz, 400 MHz to 472 MHz). It can solve the inconvenience of having to connect by wire. The present invention can solve the inconvenience of having to connect by wire to each house by using a frequency of a certain band.

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Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the equivalents of the claims of the present invention as well as the following claims.

1 is a block diagram showing a village-based broadcasting system according to the present invention.

FIG. 2 is a block diagram illustrating an example of the control and power unit shown in FIG. 1.

3 is a block diagram illustrating an example of the signal amplifier illustrated in FIG. 1.

* Description of the symbols for the main parts of the drawings *

100; Wireless transmitter

200, 300; Wireless receiver

201, 301; antenna

210, 310; RF receiver

220, 320; Signal amplifier

230, 330; Display

240, 340; Control and power supply

Claims (1)

In the radio receiving apparatus of the village broadcasting system for receiving a frequency signal of the band 136MHz ~ 172MHz or 216MHz ~ 230MHz from the wireless transmitter, and listen to the voice signal in the individual homes in the village unit by using the input frequency signal: A radio frequency receiver configured to receive the frequency signal and generate a first output signal; A signal amplifier for amplifying a first output signal of the radio frequency receiver and generating a second output signal; A signal output unit for receiving the second output signal and outputting the voice signal; And Receives AC power and converts it into a first or second DC power, provides the first DC power to the radio frequency receiver, provides the second DC power to the signal amplifier, and operates the wireless receiver. Including a control and a power supply for controlling, The signal amplifier includes an input terminal for receiving the first output signal; A variable resistor circuit for varying the first output signal; And an amplifier circuit for receiving the output value of the variable resistance circuit and the second DC power supply and generating the second output signal. The control and power supply unit is an input terminal for receiving the AC power; A transformer for converting primary AC power from said input terminal into secondary AC power; A zener diode connected to both ends of the transformer; A bridge circuit connected to both ends of the transformer and connected in parallel with the zener diode to convert the secondary AC power into the second DC power; A capacitor connected between the output terminal of the bridge circuit and a ground terminal; And a voltage generation circuit connected to an output terminal of the bridge circuit and configured to receive the second DC power and generate the first DC power.

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