KR20100048093A - Dual tuner using in the satellite transmitters - Google Patents

Dual tuner using in the satellite transmitters Download PDF

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Publication number
KR20100048093A
KR20100048093A KR1020080107100A KR20080107100A KR20100048093A KR 20100048093 A KR20100048093 A KR 20100048093A KR 1020080107100 A KR1020080107100 A KR 1020080107100A KR 20080107100 A KR20080107100 A KR 20080107100A KR 20100048093 A KR20100048093 A KR 20100048093A
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KR
South Korea
Prior art keywords
signal
broadcast signal
input
broadcast
path
Prior art date
Application number
KR1020080107100A
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Korean (ko)
Inventor
이재순
임형진
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삼성전기주식회사
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Priority to KR1020080107100A priority Critical patent/KR20100048093A/en
Publication of KR20100048093A publication Critical patent/KR20100048093A/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H40/00—Arrangements specially adapted for receiving broadcast information
    • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
    • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
    • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

PURPOSE: A dual tuner used in a satellite broadcast receiver is provided to switch a signal path of a satellite broadcast, thereby independently receiving a channel included in one satellite broadcast. CONSTITUTION: If a single path setting control signal is inputted, the first path controlling unit(130) passes the first broadcast signal. If the first broadcast signal dual path setting control signal is inputted, the first path controlling unit passes part of the first broadcast signal and branches part of the first broadcast signal. If the second broadcast signal dual path setting control signal is inputted, the first path controlling unit blocks the first broadcast signal and receives the second broadcast signal to output.

Description

Dual tuner using in the satellite transmitters

The present invention relates to a dual tuner applied to a satellite broadcasting receiver.

In particular, the present invention relates to a dual tuner applied to a satellite broadcasting receiver capable of switching the signal path of satellite broadcasting so that channels included in one satellite broadcasting can be independently received.

The dual tuner is a receiver capable of tuning both broadcast channels to one broadcast signal in a satellite broadcast receiver or tuning each broadcast channel to different broadcast signals.

Accordingly, the dual tuner tunes two broadcast channels simultaneously to watch one broadcast channel and performs a PVR function for recording another broadcast channel, or a satellite broadcast receiver equipped with a PIP function provides one broadcast channel. A main screen can be displayed and another broadcast channel can be displayed as a sub screen.

In the conventional dual tuner capable of such a function, as shown in FIG. 1, a high frequency signal input from a satellite antenna is distributed inside and outside, and a channel is selected from a high frequency signal distributed therein and a broadcast signal of a selected channel is provided. A first tuner unit 12 for converting an intermediate frequency into an intermediate frequency, and a first demodulator 13 for demodulating the intermediate frequency converted from the first tuner unit 12 into an OFDM signal; A second tuner unit which selects a channel of the high frequency signal distributed to the outside and converts the broadcast signal of the selected channel into an intermediate frequency

(14) and a second demodulation section 15 for demodulating the intermediate frequency output from the second tuner section 14 into an OFDM signal.

As another example, the conventional dual tuner includes a first tuner unit 22 for selecting a channel from a high frequency signal input from the antenna 1 and converting a broadcast signal of the selected channel into an intermediate frequency as shown in FIG. A first demodulator 23 for demodulating the intermediate frequency converted by the first tuner 22 into an OFDM signal, and selecting a channel from a high frequency signal input from the antenna 2 and converting the broadcast signal of the selected channel into an intermediate frequency. The second tuner section 24 converts and outputs the second tuner section 25 that demodulates the intermediate frequency output from the second tuner section 24 into an OFDM signal.

However, since the dual tuners are connected to each tuner by a cable through a separate distributor (not shown), the configuration of the splitter and the cable connection is complicated, and there is a problem in transmission loss due to cable distribution. .

The present invention devised to solve the above problems, provides a dual tuner applied to the satellite broadcast receiver that can switch the signal path of the satellite broadcast to receive the channels included in one satellite broadcast independently of each other. It is.

The present invention for achieving the above object, a first low noise amplifier for amplifying and outputting the first broadcast signal received from the first antenna; A second low noise amplifier for amplifying and outputting a second broadcast signal received from a second antenna; When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the first broadcast signal input from the first low noise amplifier is passed. When the first broadcast signal double path setting control signal is input from the main control unit, the first broadcast signal is transmitted. A first path adjusting unit which passes a part of the signal and branches a part thereof, and blocks a first broadcast signal and receives and outputs a second broadcast signal when a second broadcast signal double path setting control signal is input from the main controller; A first tuner that selects a channel from a high frequency signal of the first broadcast signal or the second broadcast signal output from the first path controller and converts the first broadcast signal or the second broadcast signal of the selected channel into an intermediate frequency signal and outputs the intermediate frequency signal; part; When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the second broadcast signal input from the second low noise amplifier is passed. If the second broadcast signal double path setting control signal is input from the main control unit, the second broadcast signal is transmitted. A second path adjusting unit which passes a part of the signal and branches a part thereof, and blocks the second broadcast signal and receives and outputs the first broadcast signal when the first broadcast signal double path setting control signal is input from the main controller; And a second channel for selecting a channel from a high frequency signal of the first broadcast signal or the second broadcast signal output from the second path controller and converting the first broadcast signal or the second broadcast signal of the selected channel into an intermediate frequency signal and outputting the intermediate frequency signal. Characterized in that it comprises a tuner portion.

The first low noise amplifier of the present invention is characterized in that when the switching-off control signal is input from the main control unit, the signal is input from the first phase antenna, and the second low noise amplifier switches from the main control unit. When the off control signal is input, the signal input from the second phase antenna is cut off.

In addition, the first low noise amplifier of the present invention comprises: a first amplifier for amplifying and outputting a signal input from the first satellite antenna; And a first amplifier switch positioned in front of the first amplifier to block a signal input from the first satellite antenna when a switching-off control signal is input from the main controller. The second low noise amplifier includes the second amplifier. A second amplifier for amplifying and outputting a signal input from the satellite antenna; And

And a second amplifier switch positioned at the front of the second amplifier to block a signal input from the second satellite antenna when a switching off control signal is input from the main controller.

In addition, when the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the first path adjusting unit passes the first broadcast signal input from the first low noise amplifier, and broadcasts the first broadcast from the main control unit. A first divider configured to pass a portion of the first broadcast signal and branch a portion when the signal dual path setting control signal is input; And a first switch for blocking a first broadcast signal and receiving and outputting a second broadcast signal when a second broadcast signal dual path setting control signal is input from the main controller. The second path controller includes a satellite broadcast receiver. When the single path setting control signal is transmitted from the main control unit, a second broadcast signal input from the second low noise amplifier is passed through, and when the second broadcast signal double path setting control signal is input from the main control unit, a part of the second broadcast signal is input. A second distributor for passing through and branching in part; And a second switch for blocking the second broadcast signal and receiving and outputting the first broadcast signal when the first broadcast signal double path setting control signal is input from the main controller.

In addition, the present invention includes a first demodulator for demodulating and outputting the signal output from the first tuner; And a second demodulation unit configured to demodulate and output a signal output from the second tuner unit, wherein control signals transmitted from the main control unit to the first path control unit include a first micom included in the first demodulator. The control signals input via the main controller and transmitted from the main controller to the second path controller are input via a first microcomputer included in the second demodulator.

According to the present invention, dual tuning for two satellite broadcasts as well as dual tuning for one satellite broadcast are possible using one dual tuner, and thus channel selectivity can be extended.

Now, a dual tuner applied to the satellite broadcasting receiver according to the present invention will be described in detail with reference to FIG. 3.

3 is a configuration diagram of a dual tuner applied to a satellite broadcasting receiver according to an embodiment of the present invention.

Referring to FIG. 3, the dual tuner 100 applied to the satellite broadcasting receiver according to an embodiment of the present invention includes a first low noise amplifier 110 and a second satellite antenna connected to a first satellite antenna ANT1. The first path adjuster 130 for branching the signals of the second low noise amplifier 120 and the first low noise amplifier 110 connected to the ANT2 and providing a transmission path for the signals of the second low noise amplifier 120. ), Which is input from the second path adjuster 140 and the first path adjuster 130 to branch the signal of the second low noise amplifier 120 and provide a transmission path for the signal of the first low noise amplifier 110. A first tuner unit 150 for processing a signal and a second tuner unit 160 for processing a signal input from the second path control unit 130 are included.

The first tuner 150 is connected to the first demodulator 210, and the second tuner 160 is connected to the second demodulator 220.

In addition, the first demodulator 210 and the second demodulator 220 include first and second micoms 211 and 221 which are respective control devices therein, and the first micom 211 includes the first The switching control signal is output to the low noise amplifier 110 and the first path control unit 130, and the second microcomputer 221 outputs the switching control signal to the second path control unit 140.

In the dual tuner having such a configuration, the first low noise amplifier 110 amplifies and outputs the signal through the first satellite antenna ANT1 with a preset gain, and the switching-off control signal is input by the first microcomputer 211. Will stop. As such, when the first low noise amplifier 110 stops operating, a signal received from the first satellite antenna ANT1 is not transmitted to the inside of the dual tuner 100 and thus the signal received through the second antenna ANT2 No interference

Meanwhile, the first path controller 130 includes a first distributor 131 and a first switch 132.

The first divider 131 branches the received signal of the first satellite antenna input from the first low noise amplifier 110 to the second path controller 140.

The first switch 132 sets a transmission path for transmitting a signal input from the second path controller 140 to the first tuner 150.

Next, the second path control unit 140 includes a second distributor 141 and a second switch 142.

The second divider 141 branches the received signal of the second satellite antenna input from the second low noise amplifier 120 to the first path adjuster 130.

The second switch 142 sets a transmission path for transmitting a signal input from the first path controller 130 to the second tuner 160.

Meanwhile, the first tuner 150 converts the high frequency signal corresponding to the channel selected as the first signal by the first path controller 130 into an intermediate frequency signal and outputs the intermediate frequency signal.

The second tuner 160 converts the high frequency signal corresponding to the channel selected as the second signal by the second path controller 140 into an intermediate frequency signal and outputs the intermediate frequency signal.

Then, the first demodulator 210 demodulates and outputs the signal output from the first tuner 150.

The second demodulator 220 demodulates and outputs a signal output from the second tuner 160.

The first demodulator 210 and the second demodulator 220 are provided with microcomputers 211 and 221 as control devices therein, and the microcomputers 211 and 221 are external main control parts (not shown). When the routing control signal is input from the first low noise amplifier 110, the second low noise amplifier 120, the first divider 131, the second divider 141, the first switch 132, a control signal is output to the second switch 142 to perform a switching operation.

Now, the operation of the dual tuner applied to the satellite broadcasting receiver according to the embodiment of the present invention shown in FIG. 3 will be described.

First, when the user displays a broadcast signal received by the first satellite antenna and stores the broadcast signal received by the second antenna on the hard disk (or when the user wants to display it as a sub-screen), the main control unit includes the first signal. The single path setting control signal is transmitted to the microcomputer 211 and the second microcomputer 221.

Then, the first microcomputer 211 sets the single path by directing the signal received from the first satellite antenna to the first tuner unit 150 by controlling the first path control unit 130 and the second microcomputer ( In addition, the second path controller 140 controls the second path adjuster 140 to direct the signal received from the second satellite antenna to the second tuner 160 to establish a single path.

As such, when the single path is set, the first low noise amplifier 110 amplifies and outputs the broadcast signal input from the first antenna, and the first tuner unit 150 outputs the signal amplified by the first low noise amplifier 110. 1 converts to an IF frequency signal and outputs the result, and accordingly, the first demodulator 210 demodulates and displays the result on the screen.

The second low noise amplifier 120 amplifies and outputs a broadcast signal input from the second antenna, and the second tuner 160 converts the signal amplified by the second low noise amplifier 120 into a second IF frequency signal. The second demodulator 220 demodulates the demodulated data and outputs the demodulated data.

On the other hand, when the user wants to display one channel among the broadcast signals received from the first satellite antenna and store the other channel in the hard disk, the main control unit has a first in the first microcomputer 211 and the second microcomputer 221. Transmit signal dual-path setting control signal.

Then, the first microcomputer 211 controls the first path adjuster 130 to direct the signal received from the first satellite antenna to the first tuner 150, and at the same time, the second path adjuster 140. To branch).

The second microcomputer 221 controls the second path controller 140 to direct the signal received and branched from the first satellite antenna to the second tuner 160. In addition, the second microcomputer 221 outputs a switching off control signal to the second low noise amplifier 120.

As such, when the dual path is set, the first low noise amplifier 110 amplifies and outputs the broadcast signal input from the first antenna, and the first tuner unit 150 outputs the signal amplified by the first low noise amplifier 110. 1 converts to an IF frequency signal and outputs the result; accordingly, the first demodulator 210 demodulates and displays the result on the screen.

The second tuner 160 converts the signal amplified by the second low noise amplifier 120 into a second IF frequency signal and outputs the second IF frequency signal. The second demodulator 220 demodulates the signal and stores the demodulated signal on the hard disk.

In this case, the second low noise amplifier 120 performs a switching operation according to the switching off control signal of the second microcomputer 221 to block transmission of the signal input from the second antenna.

Referring to the operation of the first path adjuster 130 in such an operation, the first distributor 131 performs a switching operation when the first signal branch switching control signal is input, thereby converting the signal input from the first antenna to the second path. Branching to the second switch 142 of the control unit 140. When the first signal path setting switching control signal is input from the first microcomputer 211, the first switch 132 transfers the signal received from the first antenna to the first tuner unit 150. .

When the first signal path setting switching control signal is input from the second microcomputer 221, the second switch 142 of the second path adjusting unit 140 performs a switching operation to remove the signal received from the first antenna. 2 is transmitted to the tuner 160.

Meanwhile, when the user wants to display one channel among the broadcast signals received from the second satellite antenna and store the other channel in the hard disk, the main control unit is connected to the first and second microcomputers 211 and 221. Transmit signal dual-path setting control signal.

Then, the second microcomputer 221 controls the second path adjuster 140 to direct the signal received from the second satellite antenna to the second tuner 160, and at the same time, the first path adjuster 130. To branch).

The first microcomputer 211 controls the first path adjusting unit 130 to direct the signal received and branched from the second satellite antenna to the first tuner unit 150. In addition, the first microcomputer 211 outputs a switching-off control signal to the first low noise amplifier 110.

As such, when the dual path is set, the second low noise amplifier 120 amplifies and outputs the broadcast signal input from the second antenna, and the second tuner unit 160 outputs the signal amplified by the second low noise amplifier 120. 2 is converted to the IF frequency signal and outputted, and accordingly, the second demodulator 220 demodulates and displays it on the screen.

The first tuner 150 converts the signal amplified by the first low noise amplifier 110 into a first IF frequency signal and outputs the first IF frequency signal. The first demodulator 210 demodulates the signal and stores the signal on the hard disk.

In this case, the first low noise amplifier 110 performs a switching operation according to the switching off control signal of the first microcomputer 211 to block transmission of the signal input from the first antenna.

Referring to the operation of the second path adjuster 140 in this operation, when the second signal branch switching control signal is input, the second divider 141 performs a switching operation to receive a signal input from the second antenna. Branching to the first switch 132 of the control unit 130. When the second signal path setting switching control signal is input from the second microcomputer 221, the second switch 142 transmits the signal received from the second antenna to the second tuner unit 160. .

When the second signal path setting switching control signal is input from the first microcomputer 211, the first switch 132 of the first path adjusting unit 130 performs a switching operation to remove the signal received from the second antenna. 1 is transmitted to the tuner unit 150.

4 is a configuration diagram of the first low noise amplifier of FIG. 3.

Referring to FIG. 4, the first low noise amplifier 110 includes an amplifier 110A for amplifying a signal through the first satellite antenna ANT1 to a preset gain, a power supply terminal, and an amplifier 110A. The switch 110B includes an amplifier switch 110B which disconnects power supplied from the power supply terminal to the amplifier 110A according to an external switching-off control signal SW so that the amplifier 110A does not operate.

The amplifier switch 110B of the first low noise amplifier 110 is switched to the amplifier 110A by performing a switching operation according to a switching control signal input from the microcomputer 211 of the first demodulator 210. Shut off the power.

4 illustrates the first low noise amplifier 110 of FIG. 3, the second low noise amplifier 120 of FIG. 3 also has the same configuration.

1 is a block diagram of a dual tuner using a single antenna according to the prior art.

2 is a block diagram of a dual tuner using two antennas according to the prior art.

3 is a block diagram of a dual tuner applied to a satellite broadcasting receiver according to an embodiment of the present invention.

4 is a block diagram of the low noise amplifier of FIG.

<Explanation of symbols for the main parts of the drawings>

110, 120: low noise amplifier 110A: amplifier

110B: amplifier switch 130, 140: path control unit

131, 141: distributor 132, 142: switch

150, 160: tuner section 210, 220: demodulation section

Claims (5)

A first low noise amplifier amplifying and outputting a first broadcast signal received from the first antenna; A second low noise amplifier for amplifying and outputting a second broadcast signal received from a second antenna; When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the first broadcast signal input from the first low noise amplifier is passed. When the first broadcast signal double path setting control signal is input from the main control unit, the first broadcast signal is transmitted. A first path adjusting unit which passes a part of the signal and branches a part thereof, and blocks a first broadcast signal and receives and outputs a second broadcast signal when a second broadcast signal double path setting control signal is input from the main controller; A first tuner that selects a channel from a high frequency signal of the first broadcast signal or the second broadcast signal output from the first path controller and converts the first broadcast signal or the second broadcast signal of the selected channel into an intermediate frequency signal and outputs the intermediate frequency signal; part; When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the second broadcast signal input from the second low noise amplifier is passed. If the second broadcast signal double path setting control signal is input from the main control unit, the second broadcast signal is transmitted. A second path adjusting unit which passes a part of the signal and branches a part, and blocks the second broadcast signal and receives and outputs the first broadcast signal when the first broadcast signal dual path setting control signal is input from the main controller; And A second tuner that selects a channel from the high frequency signal of the first broadcast signal or the second broadcast signal output from the second path controller and converts the first broadcast signal or the second broadcast signal of the selected channel into an intermediate frequency signal and outputs the intermediate frequency signal; Dual tuner applied to the satellite broadcasting receiver including the unit. According to claim 1, The first low noise amplifier cuts off the signal input from the first phase antenna when a switching off control signal is input from the main controller, And the second low noise amplifier cuts off the signal input from the second phase antenna when the switching-off control signal is input from the main controller. The method of claim 2, The first low noise amplifier comprises: a first amplifier for amplifying and outputting a signal input from the first satellite antenna; And And a first amplifier switch which cuts off power input to the first amplifier when a switching off control signal is input from the main controller. The second low noise amplifier may include: a second amplifier amplifying and outputting a signal input from the second satellite antenna; And And a second amplifier switch which cuts off power input to the second amplifier when a switching-off control signal is input from the main controller. According to claim 1, The first path control unit, When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the first broadcast signal input from the first low noise amplifier is passed. When the first broadcast signal double path setting control signal is input from the main control unit, the first broadcast signal is transmitted. A first divider for passing a portion of the signal and branching the signal; And And a first switch for blocking the first broadcast signal and receiving and outputting the second broadcast signal when the second broadcast signal double path setting control signal is input from the main controller. The second path control unit, When the single path setting control signal is transmitted from the main control unit of the satellite broadcasting receiver, the second broadcast signal input from the second low noise amplifier is passed. If the second broadcast signal double path setting control signal is input from the main control unit, the second broadcast signal is transmitted. A second divider for passing a portion of the signal and branching the signal; And And a second switch for blocking the second broadcast signal and receiving and outputting the first broadcast signal when the first broadcast signal dual path setting control signal is input from the main controller. According to claim 1, A first demodulator for demodulating and outputting a signal output from the first tuner unit; And And a second demodulator for demodulating and outputting a signal output from the second tuner unit, Control signals transmitted from the main controller to the first path controller are input via a first microcomputer included in the first demodulator, and control signals transmitted from the main controller to the second path controller are second. Dual tuner applied to the satellite broadcast receiver, characterized in that is input via the first microcomputer included in the demodulator.
KR1020080107100A 2008-10-30 2008-10-30 Dual tuner using in the satellite transmitters KR20100048093A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080107100A KR20100048093A (en) 2008-10-30 2008-10-30 Dual tuner using in the satellite transmitters

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Application Number Priority Date Filing Date Title
KR1020080107100A KR20100048093A (en) 2008-10-30 2008-10-30 Dual tuner using in the satellite transmitters

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KR20100048093A true KR20100048093A (en) 2010-05-11

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KR1020080107100A KR20100048093A (en) 2008-10-30 2008-10-30 Dual tuner using in the satellite transmitters

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