CN1862873A - High-frequency distribution circuit for distributing high-frequency signal - Google Patents
High-frequency distribution circuit for distributing high-frequency signal Download PDFInfo
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- CN1862873A CN1862873A CN 200610059612 CN200610059612A CN1862873A CN 1862873 A CN1862873 A CN 1862873A CN 200610059612 CN200610059612 CN 200610059612 CN 200610059612 A CN200610059612 A CN 200610059612A CN 1862873 A CN1862873 A CN 1862873A
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Abstract
The present high-frequency distribution circuit includes a switch circuit which passes a high-frequency signal from the other terminal of a high-frequency line to an output terminal if a receiver is connected to the output terminal and which grounds the other terminal of the high-frequency line via a terminator resistor if the receiver is not connected to the output terminal. As seen at an input terminal toward the output terminal, a constant value in resistance is provided regardless of whether the output terminal is used or not.
Description
This non-provisional application is enrolled this explanation through reference with its full content based on the number of patent application 2004-263990 of Japan, 2005-039408,2005-138352 and the 2005-180657 that on September 10th, 2004, on February 16th, 2005, on May 11st, 2005 and on June 21st, 2005 Japan Patent office are proposed respectively.
Invention field
The present invention relates to the high frequency distributor circuit, relate in particular to the high frequency distributor circuit that the high-frequency signal that will supply with input terminal is assigned to a plurality of lead-out terminals.
Background technology
Figure 19 is the block diagram that the composition of the acceptance division that has broadcasting-satellite system is shown.Among Figure 19, the acceptance division of this broadcasting-satellite system has antenna 103, receiver (load circuit) 104,105 and the television set 106,107 that comprises reflector 101 and LNB (low noise spare low-converter) 102.
Electric wave α from satellites transmits incides LNB102 by reflector 101.LNB102 extracts multi-channel video signal from the electric wave α that receives, and after also in addition low noise amplified simultaneously, the vision signal (high-frequency signal) of the channel that receiver 104,105 is selected was supplied with receiver 104,105 respectively.In each receiver 104,105,, and then it is transformed into video signal and audio signal, supplies with television set 106,107 the in addition FM demodulation of the output signal of LNB102.The video (for example with reference to the patent disclosure 2002-218329 of Japan communique) that on the screen of television set 106,107, shows the channel that the tuner of receiver 104,105 is selected respectively.
In this LNB102, be provided with the high frequency distributor circuit of vision signal being distributed to 2 receivers 104,105, and supply with the supply voltage of LNB102 from receiver 104,105.
The characteristic impedance of the coaxial cable that each lead-out terminal of this LNB102 and switch-box etc. is connected and the input impedance of receiver 104,105 are generally 75 Ω.Therefore, among the LNB102 etc., when a lead-out terminal monitors received signal, if what does not connect another lead-out terminal, just with the received signal total reflection, produce problems such as difference or isolation variation on another lead-out terminal so exist because of whether another lead-out terminal exists the received signal level that monitors on connection one lead-out terminal.
If, can eliminate lead-out terminal and whether use the impedance variation that causes with the obsolete lead-out terminal of 75 Ω final selector terminating.Yet, make final selector be attached to products such as LNB and switch-box, cost increases substantially.
The method that has makes the reflected signal level decay from lead-out terminal, but needs to improve Amplifier Gain insertion attenuators such as final amplifiers, thereby produces disadvantages such as current sinking increasing and phase noise difference sometimes.
Summary of the invention
Therefore, main purpose of the present invention provides a kind of lead-out terminal that can prevent and whether uses received signal level change that causes and the high frequency distributor circuit of isolating the cheapness of variation.
High frequency distributor circuit of the present invention, the high-frequency signal of supplying with input terminal is assigned to a plurality of lead-out terminals, wherein, have corresponding with a plurality of lead-out terminals respectively many HF link that are provided with and an end separately are connected to input terminal, terminal resistance element with the corresponding setting of each HF link, and corresponding setting with each HF link and when corresponding lead-out terminal connects load circuit, make high-frequency signal be sent to corresponding lead-out terminal from the other end of HF link, and when corresponding lead-out terminal does not connect described load circuit, make the commutation circuit of the other end of corresponding HF link by relevant terminal resistive element ground connection.
Another high frequency distributor circuit of the present invention, have a plurality of input terminals and a plurality of lead-out terminal, arbitrary high-frequency signal in a plurality of high-frequency signals of a plurality of input terminals of each lead-out terminal selection supply, and the high-frequency signal of selecting supplied with this lead-out terminal, wherein, many HF link with corresponding with a plurality of input terminals respectively setting, each HF link is selected to supply with the arbitrary high-frequency signal in a plurality of high-frequency signals of described a plurality of input terminals and the high-frequency signal of selecting is supplied with the selection circuit of an end of this HF link, terminal resistance element with the corresponding setting of each HF link, and corresponding setting with each HF link and when corresponding lead-out terminal connects load circuit, make high-frequency signal be sent to corresponding lead-out terminal from the other end of corresponding HF link, and when corresponding lead-out terminal does not connect described load circuit, make the commutation circuit of the other end of corresponding HF link by relevant terminal resistive element ground connection.
Preferably also have and correspondingly with each lead-out terminal be provided with and when corresponding lead-out terminal connects load circuit, export the 1st signal and corresponding lead-out terminal is exported the control circuit of the 2nd signal when not connecting load circuit, and when commutation circuit is exported the 1st signal in correspondent control circuits, make high-frequency signal be sent to corresponding lead-out terminal from the other end of corresponding HF link, when correspondent control circuits was exported the 2nd signal, the other end that makes corresponding HF link was by relevant terminal resistive element ground connection.
Again, preferably load circuit applies supply voltage corresponding to connecting lead-out terminal to this lead-out terminal; When control circuit applies supply voltage on corresponding lead-out terminal, export the 1st signal, when on corresponding lead-out terminal, not applying supply voltage, export the 2nd signal.
Again, preferably commutation circuit comprises SPDT, this SPDT has the 2nd Lead-through terminal and the control terminal of a terminal of the public terminal of the other end that connects corresponding HF link, the 1st Lead-through terminal that connects corresponding lead-out terminal, connection relevant terminal resistive element, when described control terminal is applied the 1st voltage, conducting between public terminal and the 1st Lead-through terminal, and when control terminal is applied the 2nd voltage, conducting between public terminal and the 2nd Lead-through terminal; Another terminal ground connection with the terminal resistance element; The 1st signal is the 1st voltage that is applied to control terminal, and the 2nd signal is the 2nd voltage that is applied to control terminal.
Again, the secondary terminal resistance element and the secondary SPDT of corresponding setting with each SPDT preferably also are set, this secondary SPDT has the corresponding secondary public terminal that is provided with and connects the 1st Lead-through terminal of corresponding SPDT with each SPDT, the 1st secondary Lead-through terminal that connects corresponding lead-out terminal, the 2nd secondary Lead-through terminal that connects a terminal of corresponding secondary terminal resistance element, and sub-control terminal, when the sub-control terminal is applied the 1st voltage, conducting between secondary public terminal and the 1st secondary Lead-through terminal, and when the sub-control terminal is applied the 2nd voltage, conducting between secondary public terminal and secondary the 2nd Lead-through terminal.Another terminal ground connection with secondary terminal resistance element; Apply identical voltage on the control terminal of the sub-control terminal of secondary SPDT and corresponding SPDT.
Again, preferably commutation circuit comprises switch element, this switch element and relevant terminal resistive element are connected between the lines of the other end of corresponding HF link and earthing potential, and when control circuit is exported the 1st signal, become non-conduction, conducting when control circuit is exported the 2nd signal.
Again, the secondary terminal resistance element and the auxiliary switch element that preferably also have corresponding setting with each switch element, this auxiliary switch element and corresponding secondary terminal resistance element connected in series are between the lines of the other end of corresponding HF link and earthing potential, and when control circuit is exported the 1st signal, become non-conduction, conducting when control circuit is exported the 2nd signal.
Again, preferably also have and correspondingly with each HF link be provided with and will amplify the amplifier that corresponding lead-out terminal is supplied with in the back from the high-frequency signal of the other end of corresponding HF link, when control circuit connects load circuit at corresponding lead-out terminal, activate corresponding amplifier, and when corresponding lead-out terminal does not connect load circuit, do not activate described amplifier.
Again, the secondary terminal resistance element and the secondary commutation circuit that preferably also have corresponding setting with each commutation circuit, the corresponding setting of this pair commutation circuit with each commutation circuit, and be arranged between corresponding commutation circuit and the corresponding lead-out terminal, and when corresponding lead-out terminal connects load circuit, make high-frequency signal be sent to corresponding lead-out terminal by corresponding commutation circuit, when corresponding lead-out terminal did not connect load circuit, the high-frequency signal that will penetrate corresponding commutation circuit by corresponding secondary terminal resistance element was directed to the lines of earthing potential.
Preferably constitute the high frequency distributor circuit in the discrete circuit mode.
Preferably constitute described high frequency distributor circuit with IC regime.
High frequency distributor circuit of the present invention is provided with commutation circuit, when this commutation circuit connects load circuit at lead-out terminal, make high-frequency signal be sent to lead-out terminal from the other end of HF link, and when lead-out terminal does not connect load circuit, make the other end ground connection of HF link by the terminal resistance element.Therefore, can prevent whether lead-out terminal from using the received signal level change that causes and isolating variation.And cost is low in the time of seeking than the use final selector.
Can make above and other objects of the present invention, feature, situation and advantage clearer from the detailed description of the invention of doing below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 1 is shown.
Fig. 2 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 2 is shown.
Fig. 3 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 3 is shown.
Fig. 4 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 4 is shown.
Fig. 5 is the circuit diagram that the conversion example of execution mode 4 is shown.
Fig. 6 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 5 is shown.
Fig. 7 is the circuit diagram that the conversion example of execution mode 5 is shown.
Fig. 8 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 6 is shown.
Fig. 9 is the circuit diagram that the conversion example of execution mode 6 is shown.
Figure 10 is the circuit diagram that another conversion example of execution mode 6 is shown.
Figure 11 is the circuit diagram that the another conversion example of execution mode 6 is shown.
Figure 12 is the circuit diagram that the another conversion example of execution mode 6 is shown.
Figure 13 is the circuit diagram that the another conversion example of execution mode 6 is shown.
Figure 14 is the circuit diagram that the another conversion example of execution mode 6 is shown.
Figure 15 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 7 is shown.
Figure 16 is the circuit diagram that the conversion example of execution mode 7 is shown.
Figure 17 is the circuit diagram that another conversion example of execution mode 7 is shown.
Figure 18 is the circuit diagram that the another conversion example of execution mode 7 is shown.
Figure 19 is the block diagram that the composition of the acceptance division that has broadcasting-satellite system is shown.
Embodiment
Fig. 1 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 1 is shown.Among Fig. 1, this high frequency distributor circuit is arranged in LNB and the switch-box, and has input terminal 1, HF link 2 and 3, resistive element 4, switching circuit 5 and 6, terminal resistance element 7 and 8, capacitor 9,10,13 and 14, amplifier 11 and 12 and lead- out terminal 15 and 16.
The 1st Lead-through terminal 5a of switching circuit 5 is by the input node of capacitor 9 connection amplifiers 11, and the output node of amplifier 11 connects lead-out terminals 15 by capacitor 13.Terminal resistance element 7 is connected between the lines of the 2nd Lead-through terminal 5b of switching circuit 5 and earthing potential GND.Terminal resistance element 7 has the resistance value identical with the characteristic impedance of HF link 2 (75 Ω).
When lead-out terminal 15 being connected to receiver 104, make to be conducting state between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a by coaxial cable.Here, the characteristic impedance of establishing the coaxial cable that connects on the lead-out terminal 15 is 75 Ω, and the input resistance value of receiver 104 is 75 Ω.The high-frequency signal that passes through on the HF link 2 is sent to receiver 104 through switching circuit 5, capacitor 9, amplifier 11, capacitor 13, lead-out terminal 15 and coaxial cable.
When lead-out terminal 15 not being connected to receiver 104, make to be conducting state between the public terminal 5c of switching circuit 5 and the 2nd Lead-through terminal 5b, and the other end of HF link 2 is by terminal resistance element 7 ground connection.Therefore, when lead-out terminal 15 is connected to receiver 104 by coaxial cable and lead-out terminal 15 when being free of attachment to receiver 104, see that from input terminal 1 impedance of lead-out terminal 15 sides is 75 Ω under two kinds of situations, impedance is constant.Switching circuit 5 can switch with hand, also can be switched (back elaboration) by control circuit.
The 1st Lead-through terminal 6a of switching circuit 6 is by the input node of capacitor 10 connection amplifiers 12, and the output node of amplifier 12 connects lead-out terminals 16 by capacitor 14.Terminal resistance element 8 is connected between the lines of the 2nd Lead-through terminal 6b of switching circuit 6 and earthing potential GND.Terminal resistance element 8 has the resistance value identical with the characteristic impedance of HF link 3 (75 Ω).
When lead-out terminal 16 being connected to receiver 105, make to be conducting state between the public terminal 6c of switching circuit 6 and the 12nd Lead-through terminal 6a by coaxial cable.Here, the characteristic impedance of establishing the coaxial cable that connects on the lead-out terminal 16 is 75 Ω, and the input resistance value of receiver 105 is 75 Ω.The high-frequency signal that passes through on the HF link 2 is sent to receiver 105 through switching circuit 6, capacitor 10, amplifier 12, capacitor 14, lead-out terminal 16 and coaxial cable.
When lead-out terminal 16 not being connected to receiver 105, make to be conducting state between the public terminal 6c of switching circuit 6 and the 2nd Lead-through terminal 6b, and the other end of HF link 3 is by terminal resistance element 8 ground connection.Therefore, when lead-out terminal 16 is connected to receiver 105 by coaxial cable and lead-out terminal 16 when being free of attachment to receiver 105, see that from input terminal 1 impedance of lead-out terminal 16 sides is 75 Ω under two kinds of situations, impedance is constant.Switching circuit 6 can switch with hand, also can be switched (back elaboration) by control circuit.
The running of this high frequency distributor circuit then, is described.Lead- out terminal 15,16 being connected respectively to receiver at 104,105 o'clock, making to be conducting state between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a, is conducting state between the public terminal 6c that also makes switching circuit 6 simultaneously and the 1st Lead-through terminal 6a.At this moment, the resistance value of seeing lead-out terminal 15 sides from input terminal 1 with see that from input terminal 1 resistance value of lead-out terminal 16 sides is 75 Ω, thereby the high-frequency signal equalization that will be input to input terminal 1 is assigned to 2 lead- out terminals 15,16.
Lead-out terminal 15 is connected to receiver 104 but when lead-out terminal 16 not being connected to receiver 105, making to be conducting state between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a, is conducting state between the public terminal 6c that also makes switching circuit 6 simultaneously and the 2nd Lead-through terminal 6b.At this moment, the resistance value of seeing lead-out terminal 15 sides from input terminal 1 with see that from input terminal 1 resistance value of lead-out terminal 16 sides is 75 Ω, thereby the high-frequency signal equalization that will be input to input terminal 1 is assigned to 2 lead-out terminals 15,16.Lead-out terminal 16 is connected to receiver 105 but when lead-out terminal 15 not being connected to receiver 104, also identical.Therefore, can stable allocation high-frequency signal, with whether lead-out terminal 15 or 16 to be connected to receiver irrelevant.
In the present embodiment 1, lead-out terminal 15,16 connects receiver 104,105 o'clock, make high-frequency signal be sent to lead-out terminal 15,16 from the other end of HF link 2,3, and lead-out terminal 15,16 did not connect receiver at 104,105 o'clock, and the other end that makes HF link 2,3 is by terminal resistance element 7,8 ground connection.Therefore, can prevent from whether lead-out terminal 15,16 to be connected to receiver 104,105 and the received signal level change that causes and isolate variation.And, to compare during with the use final selector, operability improves, and owing to do not need exterior member, manufacturability improves, and can seek cost and reduce.
Again, in the present embodiment 1, the characteristic impedance of HF link 2,3 and the resistance value of terminal resistance element 7,8 are taken as 75 Ω, identical with receiver 104,105, but the resistance value that also can make the characteristic impedance of HF link 2,3 and terminal resistance element 7,8 is the value (for example 50 Ωs) different with receiver 104,105, and between amplifier 11,12 and lead-out terminal 15,16 impedance transformer that 50 Ω is transformed into 75 Ω is set.
Fig. 2 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 2 is shown.With reference to figure 2, this high frequency distributor circuit SPDT (single-pole double-throw switch (SPDT)) 20,21 switching circuit 5,6 of pie graphs 1 respectively.
SPDT20 comprises public terminal 20c, the 1st Lead-through terminal 20a, the 2nd Lead-through terminal 20b, the 1st control device 20d and the 2nd control terminal 20e.Public terminal 20c is connected to the other end of HF link 2.The 1st Lead-through terminal 20a is connected to the input node of amplifier 11 by capacitor 9.The 2nd Lead-through terminal 20b is connected to the lines of earthing potential GND by terminal resistance element 7 and capacitor 22.Capacitor 22 is set, is used to prevent that direct current from flowing to the lines of earthing potential GND from the 2nd Lead-through terminal 20b, this capacitor has the impedance enough low to high-frequency signal.
When lead-out terminal 15 being connected to receiver 104 by coaxial cable, the the 1st and the 2nd control terminal 20b, 20e to SPDT20 supply with H level (3V) and L level (0V) respectively, make to be conducting state between the public terminal 20c of SPDT20 and the 1st Lead-through terminal 20a.
When lead-out terminal 15 not being connected to receiver 104, the the 1st and the 2nd control terminal 20d, 20e to SPDT20 supply with L level and H level respectively, make to be conducting state between the public terminal 20c of SPDT20 and the 2nd Lead-through terminal 20b, and by the other end ground connection of terminal resistance element 7 with HF link 2.
SPDT21 comprises public terminal 21c, the 1st Lead-through terminal 21a, the 2nd Lead-through terminal 21b, the 1st control device 21d and the 2nd control terminal 21e.Public terminal 21c is connected to the other end of HF link 3.The 1st Lead-through terminal 21a is connected to the input node of amplifier 12 by capacitor 10.The 2nd Lead-through terminal 21b is connected to the lines of earthing potential GND by terminal resistance element 8 and capacitor 23.Capacitor 23 is set, is used to prevent that direct current from flowing to the lines of earthing potential GND from the 2nd Lead-through terminal 21b, this capacitor has the impedance enough low to high-frequency signal.
When lead-out terminal 16 being connected to receiver 105 by coaxial cable, the the 1st and the 2nd control terminal 21b, 21e to SPDT21 supply with H level (3V) and L level (0V) respectively, make to be conducting state between the public terminal 21c of SPDT21 and the 1st Lead-through terminal 21a.
When lead-out terminal 16 not being connected to receiver 105, the the 1st and the 2nd control terminal 21d, 21e to SPDT21 supply with L level and H level respectively, make to be conducting state between the public terminal 21c of SPDT21 and the 2nd Lead-through terminal 21b, and by the other end ground connection of terminal resistance element 7 with HF link 2.Other composition is identical with execution mode 1 with running, thereby does not repeat its explanation.
In the present embodiment 2, also can obtain the effect identical with execution mode 1.And, the increase of the current drain that use SPDT causes, little of unchallenged degree.
Fig. 3 is the circuit diagram that the high frequency distributor circuit of embodiment of the present invention 3 is shown.With reference to figure 3, this high frequency distributor circuit is with the switching circuit 5 of PIN diode 31 and 32, capacitor 33 and 34, resistive element the 35, the 1st control terminal 36 and the 2nd control terminal 37 pie graphs 1, with the switching circuit 6 of PIN diode 41 and 42, capacitor 43 and 44, resistive element the 45, the 1st control terminal 46 and the 2nd control terminal 47 pie graphs 1.
When lead-out terminal 15 being connected to receiver 104 by coaxial cable, the 1st control terminal 36 is supplied with the 1st voltage V1, the 2nd voltage of also the 2nd control terminal 31 being supplied with greater than the 1st voltage V1 makes diode 32 be conducting state simultaneously, makes diode 31 be nonconducting state simultaneously.At this moment, direct current flows to the lines of earthing potential GND by diode 32 and resistive element 35 from the 2nd control terminal 37.Because the resistance value of diode 32 and resistive element 35 is enough big, makes the high-frequency signal that passes through on the HF link 2 output to lead-out terminal 15 through capacitor 33 and 9, amplifier 11 and capacitor 13.
When lead-out terminal 15 not being connected to receiver 104, the 1st control terminal 36 is supplied with the 1st voltage V1, the 3rd voltage V3 that also the 2nd control terminal 37 is supplied with less than the 1st voltage V1 makes diode 31 be conducting state simultaneously, makes diode 32 be nonconducting state simultaneously.At this moment, direct current flows to the lines of earthing potential GND through terminal resistance element 7, diode 31 and resistive element 35 from the 1st control terminal 36.Because the impedance setting of capacitor 33, diode 31 and capacitor 34 is become abundant value less than terminal resistance element 7, and the other end that makes HF link 2 is by capacitor 33, diode 31, terminal resistance element 7 and capacitor 34 high frequency earthings.
When lead-out terminal 16 being connected to receiver 105 by coaxial cable, the 1st control terminal 46 is supplied with the 1st voltage V1, the 2nd voltage V2 that the 2nd control terminal 47 is supplied with greater than the 1st voltage V1 makes diode 42 be conducting state simultaneously, makes diode 41 be nonconducting state simultaneously.At this moment, direct current flows to the lines of earthing potential GND by diode 42 and resistive element 45 from the 2nd control terminal 47.Because the resistance value of diode 42 and resistive element 45 is enough big, makes the high-frequency signal that passes through on the HF link 3 output to lead-out terminal 16 through capacitor 43 and 10, amplifier 12 and capacitor 14.
When lead-out terminal 16 not being connected to receiver 10 by coaxial cable, the 1st control terminal 46 is supplied with the 1st voltage V1, also the 2nd control terminal 47 is supplied with the 3rd voltage V3 that is lower than the 1st voltage V1 simultaneously, make diode 41 be conducting state, make diode 42 be nonconducting state simultaneously.At this moment, direct current flows to earthing potential GND lines from the 1st control terminal 46 by terminal resistance element 8, diode 41 and resistive element 45.Because the impedance setting of capacitor 43, diode 41 and capacitor 44 is become abundant value less than terminal resistance element 8, and the other end that makes HF link 3 is by capacitor 43, diode 41, terminal resistance element 8 and capacitor 44 high frequency earthings.Other composition and running are identical with execution mode 1, thereby do not repeat its explanation.
Fig. 4 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 4 is shown.With reference to figure 4, this high frequency distributor circuit adds control circuit 51 and 52, HF link 53 and 54 and capacitor 55 and 56 in the high frequency distributor circuit of Fig. 1.
When by coaxial cable lead-out terminal 15 being connected to receiver 104, receiver 104 is supplied with direct voltage by coaxial cable to the lead-out terminal (being the lead-out terminal of high frequency distributor circuit) 15 of LNB and switch-box, as the supply voltage of LNB and switch-box.The direct voltage of supplying with lead-out terminal 15 is passed to node N53 by HF link 53.Control circuit 51 passes to node N53 according to direct voltage, makes conducting between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a, thereby makes high-frequency signal be sent to lead-out terminal 15.
When lead-out terminal 15 not being connected to receiver 104, lead-out terminal 15 is not applied direct voltage.Control circuit 51 does not pass to node N53 according to direct voltage, makes conducting between the public terminal 5c of switching circuit 5 and the 2nd Lead-through terminal 5b, thereby makes the other end of HF link 2 be subjected to terminating.
When lead-out terminal 16 being connected to receiver 105 by coaxial cable, receiver 105 by coaxial cable to the lead-out terminal of LNB and switch-box, be that the lead-out terminal 16 of high frequency distributor circuit is supplied with direct voltages, as the supply voltage of LNB and switch-box.The direct voltage of supplying with lead-out terminal 16 is passed to node N54 by HF link 54.Control circuit 52 passes to node N54 according to direct voltage, makes conducting between the public terminal 6c of switching circuit 6 and the 1st Lead-through terminal 6a, thereby makes high-frequency signal be sent to lead-out terminal 16.
When lead-out terminal 16 not being connected to receiver 105, lead-out terminal 16 is not applied direct voltage.Control circuit 52 does not pass to node N54 according to direct voltage, makes conducting between the public terminal 6c of switching circuit 6 and the 2nd Lead-through terminal 6b, thereby makes the other end of HF link 3 be subjected to terminating.Other composition and running are identical with execution mode 1, thereby do not repeat its explanation.
In the present embodiment 4, also can obtain the effect identical with execution mode 1.And, can prevent that the on/off of the receiver 104,105 that connects owing to lead-out terminal 15,16 from causing the impedance change that received signal level change and isolation variation take place.
Fig. 5 is the circuit diagram that the conversion example of present embodiment 4 is shown.In this conversion example, control circuit 51 makes conducting between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a when node N53 is applied direct voltage, also activate amplifier 11 simultaneously.Control circuit 51 makes conducting between the public terminal 5c of switching circuit 5 and the 2nd Lead-through terminal 5b when node N53 not being applied direct voltage, also do not activate amplifier 11 simultaneously.
Fig. 6 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 5 is shown.With reference to figure 6, this high frequency distributor circuit adds control circuit 61,62 in the high frequency distributor circuit of Fig. 1.
Control circuit is according to switching signal 1 control switch circuit 5.Switching signal 1 can supply with from receiver 104, also detectable go out in the high frequency distributor circuit, produce after lead-out terminal 15 connects coaxial cables, also the mode of available response user's indication produces.
When lead-out terminal 15 being connected to receiver 104, make switching signal 1 be the H level by coaxial cable.Control circuit 61 is supplied with the 1st control signal to switching circuit 5 when making switching signal 1 for the H level, make conducting between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a, thereby make high-frequency signal be sent to lead-out terminal 15.
When lead-out terminal 15 not being connected to receiver 104, make switching signal 1 be the L level.Control circuit 61 is supplied with the 2nd control signal to switching circuit 5 when making switching signal 1 for the L level, make conducting between the public terminal 5c of switching circuit 5 and the 2nd Lead-through terminal 5b, thereby make the other end of HF link 2 be subjected to terminating.
When lead-out terminal 16 being connected to receiver 105, make switching signal 2 be the H level by coaxial cable.Control circuit 62 is supplied with the 1st control signal to switching circuit 6 when making switching signal 2 for the H level, make conducting between the public terminal 6c of switching circuit 6 and the 1st Lead-through terminal 6a, thereby make high-frequency signal be sent to lead-out terminal 16.
When lead-out terminal 16 not being connected to receiver 105, make switching signal 2 be the L level.Control circuit 62 is supplied with the 2nd control signal to switching circuit 6 when making switching signal 2 for the L level, make conducting between the public terminal 6c of switching circuit 6 and the 2nd Lead-through terminal 6b, thereby make the other end of HF link 3 be subjected to terminating.Other composition and running are identical with execution mode 1, thereby do not repeat its explanation.
Fig. 7 is the circuit diagram that the conversion example of present embodiment 5 is shown.In this conversion example, when control circuit 61 is the H level at switching signal 1, make conducting between the public terminal 5c of switching circuit 5 and the 1st Lead-through terminal 5a, also activate amplifier 11 simultaneously.When control circuit 61 is the L level at switching signal 1, make conducting between the public terminal 5c of switching circuit 5 and the 2nd Lead-through terminal 5b, also do not activate amplifier 11 simultaneously.
When control circuit 62 is the H level at switching signal 2, make conducting between the public terminal 6c of switching circuit 6 and the 1st Lead-through terminal 6a, also activate amplifier 11 simultaneously.When control circuit 62 is the L level at switching signal 2, make conducting between the public terminal 6c of switching circuit 6 and the 2nd Lead-through terminal 6b, also do not activate amplifier 12 simultaneously.Therefore, do not activate amplifier 11,12 when not required, so can seek to reduce power consumption.
Fig. 8 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 6 is shown.Among Fig. 8, the difference of the high frequency distributor circuit of this high frequency distributor circuit and Fig. 1 is: remove input terminal 1 and resistive element 4, input terminal 65 and 66 and 2 * 2 switching circuits 67 are set.Input terminal 65,66 is supplied with different high-frequency signals.2 * 2 switching circuits 67 select to supply with the arbitrary high-frequency signal in 2 high-frequency signals of 2 input terminals 65,66 corresponding to a lead-out terminal 15, and the high-frequency signal of selecting is supplied with this lead-out terminal 15.2 * 2 switching circuits 67 select to supply with arbitrary high-frequency signal in 2 high-frequency signals of 2 input terminals 65,66 corresponding to another lead-out terminal 15 again, and the high-frequency signal of selecting is supplied with this lead-out terminal 15.Therefore, lead-out terminal 15,16 is both supplied with identical high-frequency signal sometimes, supplied with different high-frequency signals again sometimes.
In this high frequency distributor circuit, connecting receiver at 104,105 o'clock at lead-out terminal 15,16, make high-frequency signal be sent to lead-out terminal 15,16 from the other end of HF link 2,3, and do not connecting receiver at 104,105 o'clock at lead-out terminal 15,16, make HF link 2,3 by terminal resistance element 7,8 ground connection.Therefore, can prevent from whether lead-out terminal 15,16 to be connected to receiver 104,105 and the received signal level change that causes and isolate variation.Compare during with the use final selector, operability improves, and owing to do not need exterior member, manufacturability improves, and can seek to reduce cost.
As Fig. 9～shown in Figure 14,, also can obtain identical effect with the input terminal 1 and the resistive element 4 of the high frequency distributor circuit of input terminal 65 and 66 and 2 * 2 switching circuits, 67 permutation graphs, 2～Fig. 7.This is self-evident.
In the high frequency distributor circuit of Fig. 8, when the high-frequency signal of for example wishing to supply with input terminal 65 was only supplied with lead-out terminal 15, the part of high-frequency signal also leaked into lead-out terminal 16 by 2 * 2 switching circuits 67.Switching circuit 6 and terminal resistance element 8 stop the high-frequency signal of leakage, but the part of leakage high-frequency signal also leaks into lead-out terminal 16 by switching circuit 6.When lead-out terminal 16 connects the impedance of change, because its impedance change make the amplitude change of the high-frequency signal that leaks into lead-out terminal 16 sides, and then the amplitude of the high-frequency signal of lead-out terminal 15 changes also.Present embodiment 7 is sought head it off.
Figure 15 is the circuit diagram of composition that the high frequency distributor circuit of embodiment of the present invention 7 is shown, and is the figure with Fig. 8 contrast.With reference to Figure 15, the difference of the high frequency distributor circuit of this high frequency distributor circuit and Fig. 8 is: add switching circuit 71 and 72 and terminal resistance element 73 and 74.
The 1st Lead-through terminal 5a of switching circuit 5 is connected to the public terminal 71c of switching circuit 71, the 1st Lead-through terminal 71a of switching circuit 71 is connected to the input node of amplifier 11 by capacitor 9, and the 2nd Lead-through terminal 71b of switching circuit 71 then is connected to the lines of earthing potential GND by terminal resistance element 73.Switching circuit 5 and 71 similarly carries out handover operation, between the terminal 5a of switching circuit 5 and the 5c during conducting, conducting between the terminal 71a of switching circuit 71 and the 71c, between the terminal 5b of switching circuit 5 and the 5c during conducting, conducting between the terminal 71b of switching circuit 71 and the 71c.
The 1st Lead-through terminal 6a of switching circuit 6 is connected to the public terminal 72c of switching circuit 72, the 1st Lead-through terminal 72a of switching circuit 72 is connected to the input node of amplifier 12 by capacitor 10, and the 2nd Lead-through terminal 72b of switching circuit 72 then is connected to the lines of earthing potential GND by terminal resistance element 74.Switching circuit 6 and 72 similarly carries out handover operation, between the terminal 6a of switching circuit 6 and the 6c during conducting, conducting between the terminal 72a of switching circuit 72 and the 72c, between the terminal 6b of switching circuit 6 and the 6c during conducting, conducting between the terminal 72b of switching circuit 72 and the 72c.
When the high-frequency signal that for example will supply with input terminal 65 was only supplied with lead-out terminal 15, the part high-frequency signal leaked into lead-out terminal 16 sides by 2 * 2 switching circuits 67.Switching circuit 6 and terminal resistance element 8 make and leak the high-frequency signal termination, but the part of leakage high-frequency signal also leaks into switching circuit 72 sides by switching circuit 6.Switching circuit 72 and terminal resistance element 74 stop the high-frequency signal that leaks from switching circuit 6.As a result, the amplitude suppressing that leaks into the high-frequency signal of lead-out terminal 16 is got minimum, when lead-out terminal 16 connects the impedance of change, also suppress this impedance change little the high-frequency signal amplitude influence of lead-out terminal 15.
Figure 16 is the circuit diagram that the conversion example of present embodiment 7 is shown, and is the figure with Fig. 9 contrast.With reference to Figure 16, the difference of the high frequency distributor circuit of this high frequency distributor circuit and Fig. 9 is: add SPDT75 and 76, terminal resistance element 77 and 78 and capacitor 79 and 80.
SPDT75 comprises public terminal 75c, the 1st Lead-through terminal 75a, the 2nd Lead-through terminal 75b, the 1st control terminal 75d and the 2nd control terminal 75e.Public terminal 75c connects the 1st Lead-through terminal 20a of SPDT20.The 1st Lead-through terminal 75a is connected to the input node of amplifier 11 by capacitor 9.The 2nd Lead-through terminal 75b is connected to the lines of earthing potential GND by terminal resistance element 77 and capacitor 79.
The 1st of SPDT75 is supplied with the level signal identical with 20e with the 1st and the 2nd control terminal 20d of SPDT20 respectively with the 2nd control terminal 75d and 75e, SPDT20 and 75 similarly carries out handover operation, between the terminal 20a of SPDT20 and the 20c during conducting, conducting between the terminal 75a of SPDT75 and the 75c, between the terminal 20b of SPDT20 and the 20c during conducting, conducting between the terminal 75b of SPDT75 and the 75c.
SPDT76 comprises public terminal 76c, the 1st Lead-through terminal 76a, the 2nd Lead-through terminal 76b, the 1st control terminal 76d and the 2nd control terminal 76e.Public terminal 76c connects the 1st Lead-through terminal 21a of SPDT21.The 1st Lead-through terminal 76a is connected to the input node of amplifier 12 by capacitor 10.The 2nd Lead-through terminal 76b is connected to the lines of earthing potential GND by terminal resistance element 78 and capacitor 80.
The 1st of SPDT76 is supplied with the level signal identical with 21e with the 1st and the 2nd control terminal 21d of SPDT21 respectively with the 2nd control terminal 76d and 76e, SPDT21 and 76 similarly carries out handover operation, between the terminal 21a of SPDT21 and the 21c during conducting, conducting between the terminal 76a of SPDT76 and the 76c, between the terminal 21b of SPDT21 and the 21c during conducting, conducting between the terminal 76b of SPDT76 and the 76c.
This conversion example also can obtain the effect identical with execution mode 7.
Figure 17 is the circuit diagram that another conversion example of present embodiment 7 is shown, and is the figure with Figure 10 contrast.With reference to Figure 17, the difference of the high frequency distributor circuit of this high frequency distributor circuit and Figure 10 is: add PIN diode 81,82,91 and 92, capacitor 83,84,93 and the 94, the 1st control terminal 86 and the 96 and the 2nd control terminal 87 and 97.
To the 1st and the 2nd control terminal 86 and 87, supply with the voltage identical respectively with the 1st and the 2nd control terminal 36,37.Make diode 32 for conducting state also makes diode 31 under the situation of nonconducting state simultaneously, make diode 82 be conducting state, also make diode 81 be nonconducting state simultaneously.Make diode 32 for nonconducting state also makes diode 31 under the situation of conducting state simultaneously, make diode 82 be nonconducting state, also make diode 81 be conducting state simultaneously.
To the 1st and the 2nd control terminal 96 and 97, supply with the voltage identical respectively with the 1st and the 2nd terminal 46,47.Make diode 42 for conducting state also makes diode 41 under the situation of nonconducting state simultaneously, make diode 92 be conducting state, also make diode 91 be nonconducting state simultaneously.Make diode 42 for nonconducting state also makes diode 41 under the situation of conducting state simultaneously, make diode 92 be nonconducting state, also make diode 91 be conducting state simultaneously.
This conversion example also can obtain the effect identical with execution mode 7.
Figure 18 is the circuit diagram that the another conversion example of present embodiment is shown, and is the figure with Figure 11 contrast.With reference to Figure 18, the difference of the high frequency distributor circuit of this high frequency distributor circuit and Figure 11 is: add switching circuit 71 and 72 and terminal resistance element 73 and 74.Switching circuit 71 and 72 and the annexation of terminal resistance element 73 and 74 and running illustrated as Figure 15.
This conversion example also can obtain the effect identical with execution mode 7.
In addition, above-mentioned high frequency distributor circuit is constituted with the IC regime that forms transistor, diode, resistive element, capacitor etc. on 1 block semiconductor substrate, it is constituted with configuration on printed circuit board (PCB) and the discrete circuit mode that connects each parts.
Though elaborated and illustrated the present invention, obviously these are only non-limiting for illustrative examples, and the spirit and scope of the present invention are only by the definition of term of appended claims.
Claims (22)
1, a kind of high frequency distributor circuit is assigned to a plurality of lead-out terminals with the high-frequency signal of supplying with input terminal, it is characterized in that having
Corresponding with described a plurality of lead-out terminals respectively many HF link that are provided with and will an end separately be connected to described input terminal,
With the terminal resistance element of the corresponding setting of each HF link and
Commutation circuit, the corresponding setting of this commutation circuit and when corresponding lead-out terminal connects load circuit with each HF link, make high-frequency signal be sent to corresponding lead-out terminal from the other end of HF link, and when corresponding lead-out terminal did not connect described load circuit, the other end that makes corresponding HF link was by relevant terminal resistive element ground connection.
2, the high frequency distributor circuit described in claim 1 is characterized in that,
Also have corresponding setting and when corresponding lead-out terminal connects load circuit, export the 1st signal, and corresponding lead-out terminal is exported the control circuit of the 2nd signal when not connecting load circuit with each lead-out terminal;
When described commutation circuit is exported the 1st signal at the control circuit of correspondence, make high-frequency signal be sent to corresponding lead-out terminal from the other end of corresponding HF link, when correspondent control circuits was exported described the 2nd signal, the other end that makes corresponding HF link was by relevant terminal resistive element ground connection.
3, the high frequency distributor circuit described in claim 2 is characterized in that,
Described load circuit applies supply voltage corresponding to connecting described lead-out terminal to this lead-out terminal;
When described control circuit applies described supply voltage on corresponding lead-out terminal, export described the 1st signal, when on corresponding lead-out terminal, not applying described supply voltage, export described the 2nd signal.
4, the high frequency distributor circuit described in claim 2 is characterized in that,
Described commutation circuit comprises SPDT, this SPDT has the 2nd Lead-through terminal and the control terminal of a terminal of the public terminal of the other end that connects corresponding HF link, the 1st Lead-through terminal that connects corresponding lead-out terminal, connection relevant terminal resistive element, when described control terminal is applied the 1st voltage, conducting between described public terminal and described the 1st Lead-through terminal, and when described control terminal is applied the 2nd voltage, conducting between described public terminal and described the 2nd Lead-through terminal;
Another terminal ground connection with described terminal resistance element;
Described the 1st signal is described the 1st voltage that is applied to described control terminal, and described the 2nd signal is described the 2nd voltage that is applied to described control terminal.
5, the high frequency distributor circuit described in claim 4 is characterized in that,
The secondary terminal resistance element that also has corresponding setting with each SPDT, and secondary SPDT, this secondary SPDT has the corresponding secondary public terminal that is provided with and connects the 1st Lead-through terminal of corresponding SPDT with each SPDT, the 1st secondary Lead-through terminal that connects corresponding lead-out terminal, the 2nd secondary Lead-through terminal that connects a terminal of corresponding secondary terminal resistance element, and sub-control terminal, when described sub-control terminal is applied the 1st voltage, conducting between described secondary public terminal and the described the 1st secondary Lead-through terminal, and when described sub-control terminal is applied the 2nd voltage, conducting between described secondary public terminal and described secondary the 2nd Lead-through terminal;
Another terminal ground connection with described secondary terminal resistance element;
On the described control terminal of the described sub-control terminal of described secondary SPDT and corresponding SPDT, apply identical voltage.
6, the high frequency distributor circuit described in claim 2 is characterized in that,
Described commutation circuit comprises switch element, this switch element and relevant terminal resistive element are connected between the lines of the other end of corresponding HF link and earthing potential, and when described control circuit is exported described the 1st signal, become non-conduction, conducting when described control circuit is exported described the 2nd signal.
7, the high frequency distributor circuit described in claim 6 is characterized in that,
The secondary terminal resistance element and the auxiliary switch element that also have corresponding setting with each switch element, this auxiliary switch element and corresponding secondary terminal resistance element connected in series are between the lines of the other end of corresponding HF link and earthing potential, and when described control circuit is exported described the 1st signal, become non-conduction, conducting when described control circuit is exported described the 2nd signal.
8, the high frequency distributor circuit described in claim 2 is characterized in that,
Also have and correspondingly with each HF link be provided with and will amplify the amplifier that corresponding lead-out terminal is supplied with in the back from the high-frequency signal of the other end of corresponding HF link,
When described control circuit connects described load circuit at corresponding lead-out terminal, activate corresponding amplifier, and when corresponding lead-out terminal does not connect described load circuit, do not activate described amplifier.
9, the high frequency distributor circuit described in claim 1 is characterized in that,
The secondary terminal resistance element and the secondary commutation circuit that also have corresponding setting with each commutation circuit, the corresponding setting of this pair commutation circuit with each commutation circuit, and be arranged between corresponding commutation circuit and the corresponding lead-out terminal, and when corresponding lead-out terminal connects described load circuit, make high-frequency signal be sent to corresponding lead-out terminal by corresponding commutation circuit, when corresponding lead-out terminal did not connect described load circuit, the high-frequency signal that will penetrate corresponding commutation circuit by corresponding secondary terminal resistance element was directed to the lines of earthing potential.
10, the high frequency distributor circuit described in claim 1 is characterized in that,
Constitute described high frequency distributor circuit in the discrete circuit mode.
11, the high frequency distributor circuit described in claim 1 is characterized in that,
Constitute described high frequency distributor circuit with IC regime.
12, a kind of high frequency distributor circuit, have a plurality of input terminals and a plurality of lead-out terminal, each lead-out terminal selects to supply with the arbitrary high-frequency signal in a plurality of high-frequency signals of described a plurality of input terminals, and the high-frequency signal of selecting is supplied with this lead-out terminal, it is characterized in that having
Respectively many HF link of corresponding setting with described a plurality of input terminals,
Each HF link select to supply with in a plurality of high-frequency signals of described a plurality of input terminals arbitrary high-frequency signal and with the high-frequency signal of selecting supply with an end of this HF link the selection circuit,
With the terminal resistance element of the corresponding setting of each HF link and
Commutation circuit, the corresponding setting of this commutation circuit and when corresponding lead-out terminal connects load circuit with each HF link, make high-frequency signal be sent to corresponding lead-out terminal from the other end of corresponding HF link, and when corresponding lead-out terminal did not connect described load circuit, the other end that makes corresponding HF link was by relevant terminal resistive element ground connection.
13, the high frequency distributor circuit described in claim 12 is characterized in that,
Also have and correspondingly with each lead-out terminal be provided with and when corresponding lead-out terminal connects load circuit, export the 1st signal and corresponding lead-out terminal is exported the control circuit of the 2nd signal when not connecting load circuit;
When described commutation circuit is exported the 1st signal in correspondent control circuits, make high-frequency signal be sent to corresponding lead-out terminal from the other end of corresponding HF link, when correspondent control circuits was exported described the 2nd signal, the other end that makes corresponding HF link was by relevant terminal resistive element ground connection.
14, the high frequency distributor circuit described in claim 13 is characterized in that,
Described load circuit applies supply voltage corresponding to connecting described lead-out terminal to this lead-out terminal;
When described control circuit applies described supply voltage on the lead-out terminal of correspondence, export described the 1st signal, when on the lead-out terminal of correspondence, not applying described supply voltage, export described the 2nd signal.
15, the high frequency distributor circuit described in claim 13 is characterized in that,
Described commutation circuit comprises SPDT, this SPDT has the 2nd Lead-through terminal and the control terminal of a terminal of the public terminal of the other end that connects corresponding HF link, the 1st Lead-through terminal that connects corresponding lead-out terminal, connection relevant terminal resistive element, when described control terminal is applied the 1st voltage, conducting between described public terminal and described the 1st Lead-through terminal, and when described control terminal is applied the 2nd voltage, conducting between described public terminal and described the 2nd Lead-through terminal;
Another terminal ground connection with described terminal resistance element;
Described the 1st signal is described the 1st voltage that is applied to described control terminal, and described the 2nd signal is described the 2nd voltage that is applied to described control terminal.
16, the high frequency distributor circuit described in claim 15 is characterized in that,
The secondary terminal resistance element and the secondary SPDT that also have corresponding setting with each SPDT, this secondary SPDT has the corresponding secondary public terminal that is provided with and connects the 1st Lead-through terminal of corresponding SPDT with each SPDT, the 1st secondary Lead-through terminal that connects corresponding lead-out terminal, the 2nd secondary Lead-through terminal that connects a terminal of corresponding secondary terminal resistance element, and sub-control terminal, when described sub-control terminal is applied the 1st voltage, conducting between described secondary public terminal and the described the 1st secondary Lead-through terminal, and when described sub-control terminal is applied the 2nd voltage, conducting between described secondary public terminal and described secondary the 2nd Lead-through terminal;
Another terminal ground connection with described secondary terminal resistance element;
On the described control terminal of the described sub-control terminal of described secondary SPDT and corresponding SPDT, apply identical voltage.
17, the high frequency distributor circuit described in claim 13 is characterized in that,
Described commutation circuit comprises switch element, this switch element and relevant terminal resistive element are connected between the lines of the other end of corresponding HF link and earthing potential, and when described control circuit is exported described the 1st signal, become non-conduction, conducting when described control circuit is exported described the 2nd signal.
18, the high frequency distributor circuit described in claim 17 is characterized in that,
The secondary terminal resistance element and the auxiliary switch element that also have corresponding setting with each switch element, this auxiliary switch element and corresponding secondary terminal resistance element connected in series are between the lines of the other end of corresponding HF link and earthing potential, and when described control circuit is exported described the 1st signal, become non-conduction, conducting when described control circuit is exported described the 2nd signal.
19, the high frequency distributor circuit described in claim 13 is characterized in that,
Also have and correspondingly with each HF link be provided with and will amplify the amplifier that corresponding lead-out terminal is supplied with in the back from the high-frequency signal of the other end of corresponding HF link,
When described control circuit connects described load circuit at corresponding lead-out terminal, activate corresponding amplifier, and when corresponding lead-out terminal does not connect described load circuit, do not activate described amplifier.
20, the high frequency distributor circuit described in claim 12 is characterized in that,
The secondary terminal resistance element and the secondary commutation circuit that also have corresponding setting with each commutation circuit, the corresponding setting of this pair commutation circuit with each commutation circuit, and be arranged between corresponding commutation circuit and the corresponding lead-out terminal, and when corresponding lead-out terminal connects described load circuit, make high-frequency signal be sent to corresponding lead-out terminal by corresponding commutation circuit, when corresponding lead-out terminal did not connect described load circuit, the high-frequency signal that will penetrate corresponding commutation circuit by corresponding secondary terminal resistance element was directed to the lines of earthing potential.
21, the high frequency distributor circuit described in claim 12 is characterized in that,
Constitute described high frequency distributor circuit in the discrete circuit mode.
22, the high frequency distributor circuit described in claim 12 is characterized in that,
Constitute described high frequency distributor circuit with IC regime.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005138352 | 2005-05-11 | ||
| JP2005138352 | 2005-05-11 | ||
| JP2005180657 | 2005-06-21 |
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| Publication Number | Publication Date |
|---|---|
| CN1862873A true CN1862873A (en) | 2006-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610059612 Pending CN1862873A (en) | 2005-05-11 | 2006-03-10 | High-frequency distribution circuit for distributing high-frequency signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510641A (en) * | 2017-09-12 | 2019-03-22 | 株式会社村田制作所 | High-frequency circuit, high-frequency front-end circuit and communication device |
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2006
- 2006-03-10 CN CN 200610059612 patent/CN1862873A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510641A (en) * | 2017-09-12 | 2019-03-22 | 株式会社村田制作所 | High-frequency circuit, high-frequency front-end circuit and communication device |
| CN109510641B (en) * | 2017-09-12 | 2021-01-12 | 株式会社村田制作所 | High-frequency circuit, high-frequency front-end circuit, and communication device |
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