CN102036028B - Reception apparatus and antenna switch circuit of same and tuner module - Google Patents
Reception apparatus and antenna switch circuit of same and tuner module Download PDFInfo
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- CN102036028B CN102036028B CN2010101212998A CN201010121299A CN102036028B CN 102036028 B CN102036028 B CN 102036028B CN 2010101212998 A CN2010101212998 A CN 2010101212998A CN 201010121299 A CN201010121299 A CN 201010121299A CN 102036028 B CN102036028 B CN 102036028B
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/10—Polarisation diversity; Directional diversity
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- 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
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- 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
Abstract
The invention discloses a reception apparatus and an antenna switch circuit of same and a tuner module. PND and portable TV which are employed for receiving digital TV broadcasting used for switching onboard external connected antenna and built-in antenna do not require large antenna switching IC and antenna switching control signal. A diode switch in replacement of the antenna switch IC is disposed and configured to perform switch with the on/off of a power source which is provided with LNA for provision for the external connected antenna. Therefore, the selection of any of the two antennae can realize simplification of components in usage and control signals and minimization of apparatus.
Description
Technical field
The present invention relates to antenna switching circuit, and the tuner module of receiving system of receiving system, receiving system, particularly relate to antenna switching circuit, and the tuner module of receiving system of receiving system that the antenna switching part is simplified, receiving system.
Background technology
(personal navigation equipment: Personal Navigation Device) and in the mobile television (TV/Television), the state that mostly is to be equipped on the car receives received terrestrial digital broadcasting at PND.Therefore, even the expansion receiving area, receiving sensitivity well also is essential condition.In present mobile devices such as mobile phone, there is a kind of use to be built in the antenna of ceramic core of device or device that the telescopic antenna that is installed on device receives the single-frequency broadcasting of one of received terrestrial digital broadcasting.On the other hand, in above-mentioned PND and portable television among the TV, except being built in film antenna in the device (mostly being the structure of conductor such as on flexible base, board built-in copper) or being installed on the telescopic antenna of device, how (low noise amplifier: external antenna Low Noise Amplifier) is connected use with the built-in LNA that for example is installed on vehicle body.Can expect that by using external antenna above-mentioned receiving sensitivity significantly improves.On the other hand, need carry out with the antenna switching circuit that the reception signal that is supplied to receiving circuit is switched with to its switching controls.
Patent documentation 1: the Japan Patent spy opens the 2000-341185 communique
In the receiving circuit of PND and portable television, as mentioned above, need to be used for the reception signal with arbitrary antenna is supplied to antenna switching circuit that receiving circuit selects and to the control of this switching.Therefore, at antenna and be installed in be equipped with between the receiving circuit tuner module ahead switch with IC (integrated circuit: integrated circuit), by (microprocessing unit: control signal micro processor unit) is carried out antenna and switched from MPU.In addition, the power supply with LNA of above-mentioned external antenna is supplied with from the receiving system side.
But, switch with among the IC at above-mentioned antenna, (semiconductor field effect transistor: switch metal oxide semiconductor field effect transistor) exists and maximizes and in the high problem of price to need built-in large-sized MOSFET.In addition, need to be used for the control signal of this switch of switching controls, make aspect equipment miniaturization and the simplification not preferred.
Summary of the invention
The objective of the invention is to address these problems, antenna switching circuit, and the tuner module of this receiving system of receiving system that the antenna switching part is simplified, receiving system is provided.
For realizing described purpose, the invention provides a kind of tuner module of receiving system, tuner module, it is the broadcast singal that reception is sent out through the modulation of regulation, and the tuner module of the television broadcasting receiving device of handling to received signal, it is characterized in that, have: diode switch, the reception signal that selection is supplied with by first antenna that receives described television broadcasting and by receiving described television broadcasting and will receive in the reception signal that second antenna that signal amplifies with built-in LNA supplies with any one, and export the reception signal; The feeding terminal of first power supply, to this diode switch supply with the direct voltage of regulation and to ON/OFF action control, and then the built-in LNA of described second antenna is supplied with action power; The feeding terminal of second source is compared low direct voltage to described diode supply and by the direct voltage that described first power supply is supplied with described diode switch; Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode switch, and is predetermined band with its frequency translation; Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending.
In addition, the invention provides a kind of receiving system, is to receive the broadcast singal that carries out data compression and be sent out through the modulation of regulation according to the MPEG mode, and the receiving system of the television broadcasting of handling to received signal, it is characterized in that having: first antenna receives described television broadcasting; Input terminal, input is by receiving described television broadcasting and will receiving the reception signal that signal is supplied with second antenna of built-in LNA amplification; Diode, anode terminal connects the reception signal of supplying with from described first antenna, and cathode terminal connects the reception signal of supplying with from described input terminal; First power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power; Second source is compared low direct voltage to the anode terminal supply of described diode and by the direct voltage that described first power supply is supplied with described cathode terminal; Control part carries out ON/OFF control to described first power supply; Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode switch, and is predetermined band with its frequency translation; Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending; Mpeg decode portion is supplied to by the reception signal after the demodulation section demodulation, and the MPEG mode compressing data of implementing during according to transmission is carried out decompress(ion) and decoding; AV-IF portion is supplied to the decoded reception signal by this mpeg decode portion, and it is transformed to the analog signal of the form that is fit to the image demonstration; Monitor shows carried out image by the reception signal after this AV-IF portion conversion.
In addition, the invention provides a kind of antenna switching circuit, it is the antenna switching circuit of receiving broadcast signal and the television broadcasting receiving device handled to received signal, it is characterized in that, have: diode, connect the reception signal of supplying with from first antenna that receives described television broadcasting at anode terminal, connect from the reception signal that receives described television broadcasting and supply with second electric wire that built-in LNA amplifies to received signal at cathode terminal; First power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power; Second source is supplied with the direct voltage that forces down than the direct current of described cathode terminal being supplied with by described first power supply to the anode terminal of described diode; And control part, described first power supply is carried out ON/OFF control, the reception signal that the cathode side at described diode is occurred switches output.
In addition, the invention provides a kind of tuner module, it is the tuner module of the television broadcasting receiving device that the broadcast singal that sends receives and handle to received signal to having implemented the modulation of stipulating, it is characterized in that, have: first input end, the reception signal that input is received by first antenna that receives described television broadcasting; Second input terminal, the reception signal of input from receiving described television broadcasting and supplying with second antenna that built-in LNA amplifies to received signal; Diode connects the reception signal of supplying with from described first input end at anode terminal, connects the reception signal of supplying with from described second input terminal at cathode terminal; The feeding terminal of first power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power; The feeding terminal of second source is supplied with the direct voltage that forces down than the direct current of described cathode terminal being supplied with by described first power supply to the anode terminal of described diode; Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode, and is predetermined band with its frequency translation; Demodulation section is supplied to by this frequency conversion part and carries out reception signal after the conversion, and demodulation is carried out in the described modulation of implementing when sending.
In addition, the invention provides a kind of receiving system, be to carrying out data compression in the MPEG mode and having implemented the modulation of regulation and the broadcast singal that is sent out receives, and the receiving system of the television broadcasting of handling to received signal, it is characterized in that, have: first antenna receives described television broadcasting; Input terminal, input is by receiving described television broadcasting and will receiving signal with the reception signal of second antenna reception of built-in LNA amplification; First diode, anode terminal connect the reception letter signal of supplying with from described first antenna; Second diode, anode terminal connects the reception signal of supplying with from described input terminal, and cathode terminal is connected with the cathode terminal of described first diode; First power supply is supplied with direct voltage to the anode terminal of described second diode, and then the built-in LNA of described second antenna is supplied with action power; Second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode; Control part, it carries out ON/OFF control to described first power supply; Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described first and second diode, and is predetermined band with its frequency translation; Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending; Mpeg decode portion is supplied to by the reception signal after this demodulation section demodulation, and the MPEG mode compressing data of implementing during according to transmission is carried out decompress(ion) and decoding; AV-IF portion is supplied to the decoded reception signal by this mpeg decode portion, and it is transformed to the analog signal of the form that is suitable for the image demonstration; And monitor, show carried out image by the reception signal after this AV-IF portion conversion.
In addition, the invention provides a kind of antenna switching circuit, it is the antenna switching circuit of the receiving system of receiving broadcast signal and the television broadcasting handled to received signal, it is characterized in that, have: first diode connects the reception letter signal of supplying with from first antenna that receives described television broadcasting at anode terminal; Second diode connects from the reception signal that receives described television broadcasting and supply with second antenna that built-in LNA amplifies to received signal at anode terminal, and cathode terminal is connected with the cathode terminal of described first diode; First power supply is supplied with direct voltage to the anode terminal of described second diode, and then the built-in LNA of described second antenna is supplied with action power; Second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode; And control part, described first power supply is carried out ON/OFF control, the reception signal that the cathode side at described first and second diode is occurred switches output.
In addition, the invention provides a kind of tuner module, it is the tuner module of the television broadcasting receiving device that the broadcast singal that sends receives and handle to received signal to having implemented the modulation of stipulating, it is characterized in that, have: first input end, the reception signal that input is received by first antenna that receives described television broadcasting; Second input terminal, the reception signal of input from receiving described television broadcasting and supplying with second antenna that built-in LNA amplifies to received signal; First diode connects the reception signal of supplying with from described first input end at anode terminal; Second diode connects the reception signal of supplying with from described second input terminal at anode terminal, and cathode terminal is connected with the cathode terminal of described first diode; The feeding terminal of first power supply is supplied with direct voltage to the cathode terminal of this second diode, and then the built-in LNA of described second antenna is supplied with action power; The feeding terminal of second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode; Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described first and second diode, and is predetermined band with its frequency translation; And demodulation section, be supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending.
According to the present invention, antenna switching part, and the tuner module of receiving system of receiving system that the antenna switching part is simplified, receiving system can be provided, can help the miniaturization of device and the raising of thing followed ease of use.
Description of drawings
Fig. 1 is the block diagram of the broadcast reception portion of existing receiving system;
Fig. 2 is the block diagram of broadcast reception portion of the receiving system of one embodiment of the invention;
Fig. 3 is the opposing party's block diagram of broadcast reception portion of the receiving system of one embodiment of the invention.
Symbol description
1 antenna
2 external antennas
The 2A input terminal
3LNA
5 tuner modules
The 6MPEG lsb decoder
7AV-IF portion
8 monitors
9 second sources
11 first power supplys
Embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
Fig. 1 is the block diagram of the broadcast reception portion of existing receiving system, and Fig. 2 is the block diagram of broadcast reception portion of the receiving system of one embodiment of the invention.At first, on the basis that conventional example is narrated, present embodiment is elaborated.
Among Fig. 1,1 is the telescopic antenna that is built in the film antenna of receiving system or is installed on receiving system, and 2 is the external antenna that is installed on the built-in LNA of the moving body (vehicle body of vehicle etc.) that is equipped with receiving system.External antenna more than 2 protrudes from the outside of vehicle body.1A is the input terminal with the reception signal of antenna 1 reception, and 2A is the input terminal with the reception signal of antenna 2 receptions.As mentioned above, antenna 2 is in the position of leaving from broadcast reception portion, therefore, has be used to the input terminal 2A that is attached thereto in broadcast reception portion side.On the other hand, because antenna 1 becomes integral body with broadcast reception portion, therefore, input terminal 1A can not think as inscape yet.
The reception signal that is received by antenna 1 is supplied to the input terminal that antenna switches IC (4) via capacitor C 1.The signal that is received by antenna 2 by LNA (3) be amplified to be applicable in the circuit of back segment, carry out level that signal handles after, be supplied to another the input terminal of antenna switching IC (4) via capacitor C 2.
Need action power in LNA (3), the DC power supply that is generated by first power supply 11 (this also can comprise IC) is supplied to LNA (3) by after capacitor C 4 smoothings via coil L1.In addition, among the figure, as mentioned above, the output line of LNA (3) will receive signal and be supplied to antenna switching IC (4), and above-mentioned DC power supply also is overlapped in this holding wire and is supplied to LNA (3).In addition, coil L1 and capacitor C 4 supplied with above-mentioned DC power supply, and has and make the input impedance of seeing from LNA (3) side become the effect of setting.
MPU (micro processor unit) 12 is, the control part that the portion of the broadcast reception at least integral body of receiving system is controlled.MPU (12) carries the LNA power supply switch-over control signal that is used for whether supply power is controlled to first power supply 11, and first power supply 11 is carried out ON/OFF (on/off) control.In addition, the control terminal that antenna is switched IC (4) carries control to select antenna switch-over control signal from the reception signal of any antenna in 1 and 2, selective reception signal.When the antenna switch-over control signal was selected to use the reception signal of external antenna 2 receptions, LNA power supply switching signal was controlled according to the mode that makes first power supply 11 be in ON (leading to).On the contrary, when the former selected to use the reception signal of antenna 1 reception, the latter controlled according to the mode that makes first power supply 11 be in OFF (breaking).
Be supplied to tuner module 5 with the reception signal that antenna switches IC (4) selection via capacitor C 3 according to antenna switching signal, the signal of implementing is as described later handled.In addition, the coil L2 and the capacitor C 5 that are in the input part of tuner module 5 form filter circuit, import to the band territory restriction of the reception signal of frequency conversion part 51.
Antenna switches IC (4) for comprising the circuit of the little large-scale MOSFET of ON resistance, exists because big as the size of parts, so the occupied area on substrate is big, price is high easily, in addition, needs problems such as antenna switch-over control signal as mentioned above.
According to Fig. 2 first execution mode of the present invention that addresses the above problem is elaborated.
Among Fig. 2, being not use antenna to switch IC (4) with the bigger difference of Fig. 1, replacing, is that diode D1 is set, in addition, and the antenna switch-over control signal that does not also need MPU (12) to produce thereupon.
In addition, owing to do not need antenna to switch IC (4) large component and capacitor C 2 like that, therefore, as shown in the figure, the circumferential component that comprises capacitor C 3, C4, coil L1 and resistance R 1 that with diode D1 is representative can be equipped on tuner module 5.Certainly, capacitor C 1 also can be equipped on tuner module 5.Thus, the characteristic in the time of can making the characteristic of tuner 5 monomers and be installed on receiving system inside approaches, and can shorten the exploitation operation.
In addition, different with the situation of Fig. 1 for tuner module 5 as shown, mean that making input terminal 1A and 1B is the inscape that becomes opening.
Then, the action to integral body describes according to the circuit block diagram of Fig. 2.At this, the symbol identical with the inscape components identical mark of Fig. 1.In addition, have the symbol identical with the element mark of capacitor C 1, C3, C4, C5, function that coil L1, L2 etc. are corresponding, but do not refer to that its value also must unanimity.For example among Fig. 1, form the filter of the band territory restriction of the reception signal that is input to frequency conversion part 51 by coil L2 and capacitor C 5, but in Fig. 2, because mainly by L1 and L2, capacitor C 3, C4 and C5 form this filter, and therefore, its value separately itself can be different.
When as reception antenna, external antenna 2 is not attached to device, and has only under the situation of film antenna or telescopic antenna 1 performance function, and MPU (12) carries LNA power supply switch-over control signals to first power supply 11, makes first power supply 11 be OFF.That is, not to LNA (3) supply power.On the other hand, apply positive potential from second source 9 via the anode-side of 2 couples of diode D1 of resistance R.Therefore, diode D1 forms forward bias voltage drop, flows through from the bias current of second source 9 via resistance R 2, diode D1, coil L1 and resistance R 1.This means that diode D1 is in the state of switch ON, the reception signal that receives by antenna 1 is supplied to frequency conversion part 51 via capacitor C 1, diode D1, capacitor C 3 and C5.
On the other hand, be connected in when external antenna 2 under the situation of device, MPU (12) carries LNA power supply switch-over control signal to first power supply 11, makes first power supply 11 be ON.That is, via coil L1 with receive holding wire to LNA (3) supply power.Thus, receive and appeared at by the reception signal that LNA (3) is enlarged into specified level the cathode side of diode D1 by external antenna 2.At this, if the supply voltage of first power supply 11 is set at supply voltage height than second source 9, and (generally the former is the 3V degree, the latter is about 5-8V, so satisfy this condition), then diode D1 is the state of OFF, the reception signal that receives by external antenna 2 is supplied to frequency conversion part 51 via C3, C5, and the reception signal that receives by another antenna 1 is stoped by diode D1.
That is, by using diode D1, as can be known, can realize miniaturization and simplification for the element of antenna switching, also not need the antenna switch-over control signal of Fig. 1 certainly.The magnitude relationship of the magnitude of voltage of the output of first power supply 1 and second source 9 is to have both the effect of the antenna switch-over control signal of Fig. 1.Particularly second source 9 relates to the both sides that supply with action power and this antenna change action to LNA3.
Under the situation that connects external antenna 2, use the reception signal by its reception to get final product.Certainly, the antenna mostly 2 that is installed on vehicle body is better than the accepting state of the antenna 1 that is installed in receiving system.
Relative therewith, also can use manual setting when determine using the reception signal of arbitrary antenna.In addition, when whether automatic detection connects external antenna 2 and connected, also can select it.In considering to detect automatically several different methods is arranged.The switch block that detects usefulness can be arranged on the circuit substrate of receiving system, in addition, when making first power supply 11 be in the ON state, can the load current of the regulation that whether circulates be detected.
As above, the reception signal by the effect of diode D1 is selected is supplied to frequency conversion part 51.The reception signal frequency converting of the frequency that will receive by frequency conversion part 51 is to be applicable to the frequency band that next carries out demodulation by OFDM demodulation section 52.Originally be to use heterodyne (heterodyne) conversion that is transformed to intermediate frequency band, recently direct (direct) conversion of using to base band band territory Direct Transform more more.
The reception signal that is undertaken after the frequency translation by frequency conversion part 51 is supplied to OFDM demodulation section 52.When ground-wave digital broadcasting sent from the broadcasting station, (OFDM: modulation orthogonal frequently division multiplex), this modulation was carried out demodulation by 52 demodulation of OFDM demodulation section to the data that receive to have implemented OFDM.These data are implemented to be used for MPEG (the animation expert group: compressed encoding moving picture expertsgroup) that compression receives the data content that sends.So, be supplied to mpeg decode portion 6 by the compressed data of OFDM demodulation section 52 demodulation, return the preceding data of MPEG compression.
Data by 6 decodings of mpeg decode portion are supplied to AV-IF portion (audio frequency and video interface: audio video interface) 7, formation is applicable to that LCD monitor 8 carries out the analog signal of the form of image demonstration, and then (LCD: liquid crystaldisplay) monitor 8 to be supplied to LCD, at its image displaying part, the image graph picture of broadcasting shows looking the hearer.Plasma Display Panel), ELD (electroluminescent display: Electronic LuminescenceDisplay), cathode ray tube (Braun tube) etc. the display part of monitor 8 is not limited to LCD, also can be PDP (plasma display:.
Above-mentioned second source 9 is harmonized from built-in battery or from the power supply 10 of outside supply and to it by supply and is generated.It is the power supply use of each inscape of master as tuner module 5, MPEG demodulation section 6, AV-IF (7).MPU (12) is except generating above-mentioned LNA power supply switch-over control signal, also generate the tuning control signal that is used for tuner module 5 is carried out tuning channel, and then the action of control MPEG demodulation section 6, AV-IF (7), LCD monitor (8), second source 9, that is, the portion of the broadcast reception at least integral body of receiving system is controlled.
In addition, first power supply 11 also can generate by adjusting power supply 10.In addition, can form outside inscape for tuner module 5, the first power supplys 11 and second source 9.In this case, mean that illustrated input terminal 5A and 5B are the inscapes as the feeding terminal of power supply.
As mentioned above, according to present embodiment, be suitable for for the parts of the miniaturization of duplexer portion and simplification, thus, do not need antenna control signal, by reduce parts on substrate occupied area and miniaturization and low price that can implement device.
Then, the block diagram according to Fig. 3 describes one embodiment of the invention.Fig. 3 is the opposing party block diagram different with Fig. 2 of broadcast reception portion of the receiving system of one embodiment of the invention.
The situation comparison difference of Fig. 3 and Fig. 2 is, diode D2 is arranged between the end of the end of coil L1 and capacitor C 3, and above-mentioned diode D1 is connected with cathode side is common, replaces the R1 of Fig. 2, makes the resistance of the ON electric current of circulation D1, D2 be the R3 of Fig. 3.This situation is also identical with Fig. 2, according to the LNA power supply switch-over control signal from MPU (12) first power supply 11 is carried out ON/OFF control.
If first power supply 11 is ON, then LNA (3) is applied action power from power supply 11, in addition, be ON by diode D2, and diode D1 is OFF, the reception signal that is received by external antenna 2 is supplied to frequency conversion part 51.On the contrary, if first power supply 11 is OFF, then LNA (3) not being applied action power, in addition, is that ON and diode D2 are OFF by making diode D1, and then the reception signal that receives by antenna 1 is supplied to frequency conversion part 51.
In addition, in Fig. 3, be ON and will be supplied to frequency conversion part 51 by the reception signal that antenna 1 receives the time at diode D1, the effect of diode D2 by being in the OFF state, from the later circuit part of this cathode side, be difficult to see the impedance that has to the leading part of the length between the LNA (3) in the outside of tuner 5.Therefore, has the effect that the frequency characteristic when reduce using antenna 1 changes because of the influence of this leading part.That is, even under the situation of the variable in distance between receiving system and the external antenna 2 and the change of the lead-in wire of the pattern on the circuit substrate, also have the effect of the big change that can not cause characteristic.Therefore distance between general receiving system and the external antenna 2 and the state of cable tail, become one of characteristic effect of present embodiment because the vehicle of behaviour in service and lift-launch has big variation.
Above execution mode is an example only, and the present invention is not limited to this.For example can consider multiple different example for the parts that are built in tuner module 5.In addition, in execution mode, the acceptance division that TV is broadcasted has carried out the record explanation, but in addition, also can be the multiple formation based on mobile division.In addition, also considering has multiple different execution mode, all belongs to scope of the present invention.
Claims (9)
1. a tuner module is the broadcast singal that reception is sent out through the modulation of regulation, and the tuner module of the television broadcasting receiving device of handling to received signal, it is characterized in that having:
Diode switch is selected the reception signal supplied with by first antenna that receives described television broadcasting and by receiving described television broadcasting and will receive in the reception signal that second antenna that signal amplifies with built-in LNA supplies with any one, and exports the reception signal;
The feeding terminal of first power supply, to this diode switch supply with the direct voltage of regulation and to ON/OFF action control, and then the built-in LNA of described second antenna is supplied with action power;
The feeding terminal of second source is compared low direct voltage to described diode supply and by the direct voltage that described first power supply is supplied with described diode switch;
Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode switch, and is predetermined band with its frequency translation;
Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending; With
Control part, the direct voltage of supplying with described regulation from the feeding terminal of described first power supply to whether is controlled, wherein,
Make that by the direct voltage of supplying with described regulation from the feeding terminal of described first power supply described diode switch is OFF, the reception signal of supplying with from described second antenna is selected,
Make that by the direct voltage of not supplying with described regulation from the feeding terminal of described first power supply described diode switch is ON, the reception signal of supplying with from described first antenna is selected.
2. receiving system is to receive the broadcast singal that carries out data compression and be sent out through the modulation of regulation according to the MPEG mode, and the receiving system of the television broadcasting of handling to received signal, it is characterized in that having:
First antenna receives described television broadcasting;
Input terminal, input is by receiving described television broadcasting and will receiving the reception signal that signal is supplied with second antenna of built-in LNA amplification;
Diode, anode terminal connects the reception signal of supplying with from described first antenna, and cathode terminal connects the reception signal of supplying with from described input terminal;
First power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power;
Second source is compared low direct voltage to the anode terminal supply of described diode and by the direct voltage that described first power supply is supplied with described cathode terminal;
Control part carries out ON/OFF control to described first power supply;
Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode switch, and is predetermined band with its frequency translation;
Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending;
Mpeg decode portion is supplied to by the reception signal after the demodulation section demodulation, and the MPEG mode compressing data of implementing during according to transmission is carried out decompress(ion) and decoding;
AV-IF portion is supplied to the decoded reception signal by this mpeg decode portion, and it is transformed to the analog signal of the form that is fit to the image demonstration;
Monitor shows carried out image by the reception signal after this AV-IF portion conversion.
3. antenna switching circuit is the antenna switching circuit of receiving broadcast signal and the television broadcasting receiving device handled to received signal, it is characterized in that having:
Diode connects the reception signal of supplying with from first antenna that receives described television broadcasting at anode terminal, connects from the reception signal that receives described television broadcasting and supply with second antenna that built-in LNA amplifies to received signal at cathode terminal;
First power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power;
Second source is supplied with the direct voltage that forces down than the direct current of described cathode terminal being supplied with by described first power supply to the anode terminal of described diode; With
Control part carries out ON/OFF control to described first power supply,
The reception signal that cathode side at described diode is occurred switches output.
4. tuner module is the tuner module of broadcast singal that the modulation of having implemented regulation the is sent television broadcasting receiving device that receives and handle to received signal, it is characterized in that having:
First input end, the reception signal that input is received by first antenna that receives described television broadcasting;
Second input terminal, the reception signal of input from receiving described television broadcasting and supplying with second antenna that built-in LNA amplifies to received signal;
Diode connects the reception signal of supplying with from described first input end at anode terminal, connects the reception signal of supplying with from described second input terminal at cathode terminal;
The feeding terminal of first power supply is supplied with direct voltage to the cathode terminal of this diode, and then the built-in LNA of described second antenna is supplied with action power;
The feeding terminal of second source is supplied with the direct voltage that forces down than the direct current of described cathode terminal being supplied with by described first power supply to the anode terminal of described diode;
Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described diode, and is predetermined band with its frequency translation;
Demodulation section is supplied to by this frequency conversion part and carries out reception signal after the conversion, and demodulation is carried out in the described modulation of implementing when sending; With
Whether control part is to controlling from the feeding terminal supply direct voltage of described first power supply.
5. receiving system is to carrying out data compression in the MPEG mode and implemented the modulation of regulation and the broadcast singal that is sent out receives, and the receiving system of the television broadcasting of handling to received signal, it is characterized in that having:
First antenna receives described television broadcasting;
Input terminal, input is by receiving described television broadcasting and will receiving signal with the reception signal of second antenna reception of built-in LNA amplification;
First diode, anode terminal connect the reception letter signal of supplying with from described first antenna;
Second diode, anode terminal connects the reception signal of supplying with from described input terminal, and cathode terminal is connected with the cathode terminal of described first diode;
First power supply is supplied with direct voltage to the anode terminal of described second diode, and then the built-in LNA of described second antenna is supplied with action power;
Second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode;
Control part, it carries out ON/OFF control to described first power supply;
Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described first and second diode, and is predetermined band with its frequency translation;
Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending;
Mpeg decode portion is supplied to by the reception signal after this demodulation section demodulation, and the MPEG mode compressing data of implementing during according to transmission is carried out decompress(ion) and decoding;
AV-IF portion is supplied to the decoded reception signal by this mpeg decode portion, and it is transformed to the analog signal of the form that is suitable for the image demonstration; With
Monitor shows carried out image by the reception signal after this AV-IF portion conversion.
6. antenna switching circuit is the antenna switching circuit of the receiving system of receiving broadcast signal and the television broadcasting handled to received signal, it is characterized in that having:
First diode connects the reception letter signal of supplying with from first antenna that receives described television broadcasting at anode terminal;
Second diode connects from the reception signal that receives described television broadcasting and supply with second antenna that built-in LNA amplifies to received signal at anode terminal, and cathode terminal is connected with the cathode terminal of described first diode;
First power supply is supplied with direct voltage to the anode terminal of described second diode, and then the built-in LNA of described second antenna is supplied with action power;
Second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode; With
Control part carries out ON/OFF control to described first power supply,
The reception signal that cathode side at described first and second diode is occurred switches output.
7. tuner module is the tuner module of broadcast singal that the modulation of having implemented regulation the is sent television broadcasting receiving device that receives and handle to received signal, it is characterized in that having:
First input end, the reception signal that input is received by first antenna that receives described television broadcasting;
Second input terminal, the reception signal of input from receiving described television broadcasting and supplying with second antenna that built-in LNA amplifies to received signal;
First diode connects the reception signal of supplying with from described first input end at anode terminal;
Second diode connects the reception signal of supplying with from described second input terminal at anode terminal, and cathode terminal is connected with the cathode terminal of described first diode;
The feeding terminal of first power supply is supplied with direct voltage to the cathode terminal of this second diode, and then the built-in LNA of described second antenna is supplied with action power;
The feeding terminal of second source is supplied with the direct voltage that forces down than the direct current of the anode terminal of described second diode being supplied with by described first power supply to the anode terminal of described first diode;
Frequency conversion part is supplied to the reception signal that occurs at the cathode side of described first and second diode, and is predetermined band with its frequency translation;
Demodulation section is supplied to by the reception signal after this frequency conversion part conversion, and demodulation is carried out in the described modulation of implementing when sending; With
Whether control part is to controlling from the feeding terminal supply direct voltage of described first power supply.
8. as claim 2 or 5 described receiving systems, it is characterized in that described demodulation section carries out demodulation to the modulation based on the OFDM mode.
9. as each described tuner module in the claim 1,4 and 7, it is characterized in that described demodulation section carries out demodulation to the modulation based on the OFDM mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009224923A JP5161854B2 (en) | 2009-09-29 | 2009-09-29 | Receiving device, antenna switching circuit of receiving device, and tuner module of receiving device |
| JP2009-224923 | 2009-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102036028A CN102036028A (en) | 2011-04-27 |
| CN102036028B true CN102036028B (en) | 2013-08-14 |
Family
ID=43888273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101212998A Expired - Fee Related CN102036028B (en) | 2009-09-29 | 2010-02-22 | Reception apparatus and antenna switch circuit of same and tuner module |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5161854B2 (en) |
| KR (1) | KR101145478B1 (en) |
| CN (1) | CN102036028B (en) |
| TW (1) | TW201128999A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130073756A (en) * | 2011-12-23 | 2013-07-03 | 엘지이노텍 주식회사 | Digital tuner |
| CN103236870A (en) * | 2013-04-16 | 2013-08-07 | 环旭电子股份有限公司 | High-isolation circuit with LNA (low-noise amplifier) and method for improving isolation |
| CN104124988B (en) * | 2013-04-23 | 2017-04-26 | 神讯电脑(昆山)有限公司 | Antenna connector module and antenna switching method, and electronic device applying antenna connector module and antenna switching method |
| TWI498572B (en) * | 2013-05-07 | 2015-09-01 | Wistron Corp | Method of automatically detecting the output voltage of the tuner of the dvb-s reception device, adapter and dvb-s reception device |
| KR102278762B1 (en) * | 2015-01-30 | 2021-07-19 | 엘지전자 주식회사 | Video display device and operating method thereof |
| CN107612584A (en) * | 2017-10-19 | 2018-01-19 | 环鸿电子（昆山）有限公司 | The antenna system and control method of changeable external antenna |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5161854B2 (en) | 2013-03-13 |
| CN102036028A (en) | 2011-04-27 |
| TW201128999A (en) | 2011-08-16 |
| JP2011077666A (en) | 2011-04-14 |
| KR20110035816A (en) | 2011-04-06 |
| KR101145478B1 (en) | 2012-05-15 |
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| CI01 | Correction of invention patent gazette |
Correction item: Applicant Correct: Hitachi Audio-visual Media Co., Ltd.|Iwate County False: Hitachi Video Media Electronic Co., Ltd.|Iwate County Number: 24 Volume: 27 |
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| ERR | Gazette correction |
Free format text: CORRECT: APPLICANT; FROM: HITACHI VIDEO MEDIA ELECTRONIC CO., LTD.: TO: HITACHI AUDIO-VISUAL MEDIA CO., LTD.: |
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| C14 | Grant of patent or utility model | ||
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Address after: Kanagawa Patentee after: Hitachi Audio-visual Media Co., Ltd. Address before: Iwate County Patentee before: Hitachi Audio-visual Media Co., Ltd. |
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Owner name: TKR CO., LTD. Free format text: FORMER OWNER: HITACHI AUDIO-VISUAL MEDIA CO., LTD. Effective date: 20131128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |