KR20090082554A - Receiving apparatus - Google Patents

Abstract

A receiving device is provided to integratedly form two silicon tuners, a splitter, and a demodulator on one substrate, thereby reducing a space area occupied in a broadcasting signal receiver. A splitter(100) separates an RF(Radio Frequency) signal into two signals. The first and second silicon tuners(210,220) individually input the RF signals separated by the splitter, and receive a TV broadcasting signal of a predetermined channel. The splitter and the first and second silicon tuners are integratedly equipped within one case made of a metal material. Within the case, the first and second digital demodulators are equipped. The digital demodulators demodulate a TS(Transport Stream) signal if the TV broadcasting signal is a digital signal.

Description

Receiver {RECEIVING APPARATUS}

The present invention relates to a receiver.

More specifically, in a broadcast receiver such as a television receiver and a set-top box that receives a television broadcast signal, two silicon tuners are built in a metal case to simultaneously receive two channels of television broadcast signals. It relates to a receiving device to make.

It has a DVR (Digital Video Recorder) function to receive a television broadcast signal and store it on a hard disk or a picture in picture (PIP) function that inserts another television broadcast signal into one television broadcast signal and displays it on a screen. The broadcast signal receiver provided with is provided with two tuners.

That is, a broadcast signal receiver having a DVR function includes two tuners so that a user can watch a television broadcast signal received by one tuner and record the television broadcast signal received by the other tuner to the hard disk. Doing.

In addition, the broadcast signal receiver having the PIP function is also equipped with two tuners to display the television broadcast signal received by one tuner on the entire screen, and to reduce the television broadcast signal received by the other tuner and to display the PIP function. In some areas, the user can simultaneously check video signals broadcast on two channels.

In the broadcast signal receiver having two tuners as described above, when the tuner is influenced by an external electromagnetic wave, not only the TV broadcast signal is normally received but also many noise signals are mixed in the received TV broadcast signal. .

Therefore, when manufacturing the tuner, a metal case is usually provided, and the board on which the various components constituting the tuner are mounted is embedded in the metal case, and then the metal case is connected to ground to connect the tuner to the outside. Is not affected by electromagnetic waves. Such tuners are commonly referred to as can tuners.

If the two tuners are integrated into one metal case, interference between the two tuners may occur, and thus the TV broadcast signal may not be normally received.

Therefore, a broadcast signal receiver having two tuners uses two can tuners each having two tuners in two metal cases.

In addition, the broadcast signal receiver has to split one RF (Radio Frequency) signal input from the outside into two can tuners, and is typically provided with a splitter to separate the RF signal.

When two can tuners and one splitter are configured as described above, the two can tuners and one splitter occupy a lot of space, and one splitter and two can tuners are connected by coaxial cable to the RF signal. Must be sent.

Therefore, a problem to be solved by the present invention is a receiver for reducing the space occupied by two can tuners and one splitter by integrating two tuners and one splitter into a single metal case in a broadcast signal receiver. To provide.

According to the receiver of the present invention, a silicon tuner is used instead of a can tuner. The silicon tuner includes parts related to receiving an RF signal such as a mixer oscillator phase locked loop (MOPLL) and a tunable tunable band pass filter (BPPF) such that the silicon tuner has almost no external electromagnetic influence. Even if two silicon tuners are integrated into one metal case, there is little interference between the two tuners.

In addition, the single metal case further includes a splitter for separating the RF signal input from the outside into two and inputting the two silicon tuners so that the splitter and the two silicon tuners do not need to be connected by a coaxial cable.

Therefore, the receiver of the present invention comprises a splitter for splitting an RF signal into two, first and second silicon tuners for receiving a television broadcast signal of a predetermined channel by respectively inputting an RF signal separated by the splitter, the splitter, The first and second silicon tuners are integrally provided in one metal case.

And a composite video banking synchronous signal (CVBS) signal from an output signal of the first and second silicon tuners when the television broadcast signal received by the first and second silicon tuners is an analog signal. First and second analog demodulators for demodulating a sound intermediate frequency (SIF) signal, and output signals of the first and second silicon tuners when the television broadcast signal received by the first and second silicon tuners is a digital signal. And first and second digital demodulators for demodulating a TS (Transport Stream) signal.

According to the receiving device of the present invention, a tunable BPF (tunable band pass filter) and MOPLL (Mixer Oscillator Phase Locked Loop) are integrated into the chip to use two silicon tuners that are not affected by external electromagnetic waves, The two silicon tuners, the splitter, and the demodulator are integrally formed on one substrate and embedded in a metal case, thereby reducing the space area occupied by the receiver in the broadcast signal receiver.

The following detailed description is only illustrative, and merely illustrates embodiments of the present invention. In addition, the principles and concepts of the present invention are provided for the purpose of explanation and most useful.

Accordingly, various forms that can be implemented by those of ordinary skill in the art, as well as not intended to provide a detailed structure beyond the basic understanding of the present invention through the drawings.

1 is a block diagram illustrating a configuration of a general receiving apparatus as an example. Here, reference numeral 100 denotes a splitter. The splitter 100 splits one RF (Radio Frequency) signal input from the outside into two.

The two RF signals separated by the splitter 100 are respectively input to the first and second can tuners 130 and 140 through the RF cables 110 and 120.

The first and second can tuners 130 and 140 receive a television broadcast signal of a predetermined channel from the input RF signal, and if the received broadcast signal is an analog signal, the demodulator demodulates the CVBS (Composite Video Banking). It outputs a synchronous signal and a sound intermediate frequency (SIF) signal. When the received broadcast signal is a digital signal, the digital demodulator demodulates and outputs a TS (Transport Stream) signal.

Receiving device having such a configuration is that each of the first and second can tuners (130, 140) includes a MOPLL (Mixer Oscillator Phase Locked Loop), tunable Tunable Band Pass Filter (BPPF) and Low Noise Amplifier (LNA) It requires a lot of space because it is composed using various discrete parts.

In addition, when the first and second can tuners 130 and 140 are integrally provided in one can, that is, in a metal case, the first and second can tuners 130 and 140 may have a mutual interference with each other. Will occur.

Therefore, the first and second can tuners 130 and 140 are provided in a metal case, respectively, to prevent interference with each other.

As the first and second can tuners 130 and 140 are configured as described above, the splitter 100 for separating the RF signal input from the outside into 2 and inputting the RF signals to the first and second can tuners 130 and 140 respectively. ) Had to be configured separately from the first and second can tuners 130, 140.

As the splitter 100 is separated from the first and second can tuners 130 and 140, a coaxial cable is disposed between the splitter 100 and the first and second can tuners 130 and 140. It was necessary to connect the 110 and 120 to input the RF signal separated from the splitter 100 to the first and second can tuners 130 and 140 through the coaxial cables 110 and 120.

Therefore, when manufacturing a broadcast signal receiver, the splitter 100 and the first and second can tuners 130 and 140 should be installed, respectively, and the splitter 100 and the first and second can tuners 130 and 140 may be installed. There was a problem that it takes up a lot of space to be connected to the coaxial cable (110, 120).

2 is a block diagram showing a configuration of a preferred embodiment of the receiving device of the present invention. Here, reference numeral 200 denotes a splitter. The splitter 200 divides the RF signal input from the outside into two.

The RF signal split into two by the splitter 200 is input to the first and second silicon tuners 210 and 220, respectively. Then, the first and second silicon tuners 210 and 220 receive a television broadcast signal of a predetermined channel according to a channel control signal of a controller (not shown) and convert it into an IF (Intermediate Frequency) signal.

The IF signal output by the first silicon tuner 210 is input to the first analog demodulator 230 and the first digital demodulator 250, and the IF signal output by the second silicon tuner 220 is a second analog signal. It is input to the demodulator 240 and the second digital demodulator 260.

Here, when the television broadcast signals received by the first and second silicon tuners 210 and 220 are a television broadcast signal of an analog channel, the first and second analog demodulators 230 and 240 may be used as the first and second signals. In the IF signals output by the silicon tuners 210 and 220, the CVBS signals CVBS1 and CVBS2 as video signals and the SIF signals SIF1 and SIF2 as audio signals are demodulated and output.

When the television broadcast signal received by the first and second silicon tuners 210 and 220 is a television broadcast signal of a digital channel, the first and second demodulators 250 and 260 may use the first and second silicon tuners. TS signals TS1 and TS2 are demodulated from the IF signals output by 210 and 220, respectively.

In the receiver of the present invention, each of the first and second silicon tuners 210 and 220 receives an RF signal such as a mixer oscillator phase locked loop (MOPLL) and a tunable band pass filter (BPPF). The relevant parts are embedded in the chip, so that there is little external influence of the electromagnetic field, and even if the first and second silicon tuners 210 and 220 are integrally integrated in a metal case, mutual interference Rarely occurs.

Therefore, the splitter 200, the first and second silicon tuners 210 and 220, the first and second analog demodulators 230 and 240, and the first and second digital demodulators 1 may be disposed in a metal case. The first and second tuners 210 and 220 may receive television broadcast signals of a predetermined channel desired by the user, even if they are integrally provided in the 250 and 260.

The present invention has been described in detail with reference to exemplary embodiments, but those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention. This will harm.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

The present invention relates to a receiver for receiving a television broadcast signal of two channels in a broadcast signal receiver such as a television receiver and a set-top box, and uses a silicon tuner that hardly crosstalks even when placed adjacent to each other. In order to reduce the mounting area of a receiver in a broadcast signal receiver, a receiver is constructed by integrating a splitter, two silicon tuners, first and second analog demodulators, and first and second digital demodulators in a single metal case. Can be.

1 is a block diagram showing a configuration of a general receiving apparatus as an example; and

2 is a block diagram showing a configuration of a preferred embodiment of the receiving device of the present invention.

Claims (2)

A splitter for splitting the RF signal into two; First and second silicon tuners each receiving an RF signal separated by the splitter to receive a television broadcast signal of a predetermined channel; And And the splitter and the first and second silicon tuners are integrally provided in a metal case. According to claim 1, wherein in the one metal case; Demodulating a Composite Video Banking Synchronous (CVBS) signal and a Sound Intermediate Frequency (SIF) signal from the output signals of the first and second silicon tuners when the television broadcast signals received by the first and second silicon tuners are analog signals. First and second analog demodulators; And And first and second digital demodulators for demodulating a transport stream (TS) signal from output signals of the first and second silicon tuners when the television broadcast signal received by the first and second silicon tuners is a digital signal. Receiving device, characterized in that.

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