JP6067647B2 - Redundant amplification system - Google Patents

Description

  The present invention relates to a redundant amplification system.

  For example, in a head end that is arranged in a broadcasting station such as CATV (Cable Television) and sends out audio, video, data, and the like to the user side, in order to prevent transmission of broadcast signals from being stopped even in the event of a failure. Are often configured with redundancy.

  For example, in Patent Document 1, a plurality of channel conversion devices that extract channel broadcast data, convert it into a CATV broadcast signal, and output it, and if any of the channel conversion devices is abnormal, operate instead. A technology is provided that includes a backup device for backup at the time of failure (a backup channel conversion device).

JP 2001-359063 A

  By the way, in the technique disclosed in Patent Document 1, the output signal of the channel selection converter is output after being mixed by the mixed output circuit. In such a mixed output circuit, the loss increases as the frequency of the signal increases. For this reason, in order to obtain a necessary signal level, it is necessary to set the gain of the channel selection converter higher by an amount corresponding to the loss of the mixed output circuit. There is a problem that the distortion of the high-frequency signal is worsened due to the higher amount.

  The present invention has been made in view of the above points, and an object thereof is to provide a redundant amplification system capable of obtaining a desired gain without deteriorating distortion of an output signal.

In order to solve the above problems, the present invention selects and amplifies a first amplifying device and a second amplifying device that amplify a high-frequency signal, and the first amplifying device and the second amplifying device. In addition, in the redundant amplification system including the selection device that outputs the high-frequency signal, at least one of the first amplification device and the second amplification device supplies a DC voltage superimposed on the high-frequency signal to the selection device. Supply means, and control means for controlling whether or not the DC voltage is supplied to the selection device, wherein the selection device includes the first amplifying device and the second amplifier depending on whether or not the DC voltage is supplied. Yes output means while selecting and the amplifier outputs the high frequency signal, and an extraction means for supplying said output means extracts the high-frequency signal from a signal supplied from said supply means And wherein the Rukoto.
According to such a configuration, a desired gain can be obtained without deteriorating distortion of the output signal.

Further, according to the present invention, both the first amplifying device and the second amplifying device have the supply means, and one of the first amplifying device and the second amplifying device applies the DC voltage to the high frequency The output means superimposes and outputs the signal, and the output means selects one of the amplifying devices on which the DC voltage is superimposed to extract and output the high-frequency signal.
According to such a configuration, since the amplification device having the same configuration can be used in the active system and the standby system, the manufacturing cost can be reduced.

The present invention also provides a first amplifying device and a second amplifying device for amplifying a high-frequency signal, and selecting either the first amplifying device or the second amplifying device and outputting the amplified high-frequency signal. A redundant amplifying system having at least one of the first amplifying device and the second amplifying device, wherein the at least one of the first amplifying device and the second amplifying device supplies a DC voltage to the selecting device, and supplies the DC voltage to the selecting device. Control means for controlling presence / absence of the output, and the selection device selects one of the first amplification device and the second amplification device according to the presence / absence of supply of the DC voltage and outputs the high-frequency signal. an output means for, only one of the first amplifying device and the second amplifying device has a said supply means, said supply means, and outputs the superimposing the DC voltage to the high frequency signal The output means of the selection device selects an amplification device that does not have the supply means when the DC voltage is not supplied, and selects an amplification device that has the supply means when the DC voltage is supplied. And outputting the high frequency signal.
According to such a configuration, the configuration can be simplified by configuring so that only one of the amplifying devices has the supply means.

Further, the present invention is characterized in that the selection device operates using the DC voltage supplied from the first amplification device or the second amplification device as a power supply voltage.
According to such a configuration, it is not necessary for the selection device to have a power supply unit, so that the configuration of the device can be simplified.

Further, according to the present invention, the first amplifying device and the second amplifying device are respectively housed in two housings having a rectangular parallelepiped shape, and the two housings are arranged so that predetermined side surfaces face each other in parallel. The selection devices are housed in a housing having a rectangular parallelepiped shape, and bridge the predetermined surfaces of the two housings in which the first amplification device and the second amplification device are housed. It is characterized by being arranged.
According to such a configuration, the space necessary for arranging the device can be reduced by arranging the devices so as to be bridged.

  According to the present invention, it is possible to provide a redundant amplification system capable of obtaining a desired gain without deteriorating distortion of an output signal.

It is a figure which shows the structural example of 1st Embodiment of this invention. It is a figure which shows the structural example of 2nd Embodiment of this invention. It is a figure which shows the housing | casing which accommodates embodiment shown in FIG. 1 or FIG. It is a figure which shows the housing | casing which accommodates embodiment shown in FIG. 1 or FIG.

(A) Description of Configuration of First Embodiment of the Present Invention FIG. 1 is a diagram illustrating a configuration example of the first embodiment of the present invention. As shown in FIG. 1, the redundant amplification system 10 according to the first embodiment of the present invention includes amplification devices 100 and 200 and a selection device 300. Here, the amplifying apparatus 100 and the amplifying apparatus 200 amplify the high frequency signals input from the input terminals 101 and 201, respectively, and output from the output terminals 107 and 207. The selection device 300 is connected to the amplification device 100 and the amplification device 200, selects a high-frequency signal output from either one of them, and outputs it from the output terminal 314. Note that examples of the high-frequency signal to be input include a broadcast signal having a frequency of several MHz or more in the CATV broadcasting system.

  Next, a detailed configuration of the amplifying apparatus 100 will be described. The amplification device 100 includes an input terminal 101, a branching unit 102, an amplification unit 103, a branching unit 104, a switch 105, a capacitor 106, an output terminal 107, detection units 108 and 109, a control unit 110, a coil 111, a switch 112, and a direct current. A power supply 113 is included. Here, the input terminal 101 inputs a high-frequency signal distributed by a distribution device (not shown). The branching unit 102 branches the high-frequency signal input from the input terminal 101 and supplies it to the amplification unit 103 and the detection unit 108. The amplifying unit 103 amplifies the high frequency signal supplied from the branching unit 102 with a predetermined gain and outputs the amplified signal. The branching unit 104 branches the high-frequency signal output from the amplification unit 103 and supplies it to the switch 105 and the detection unit 109. The switch 105 is controlled by the control unit 110. When the amplification device 100 is selected as the active system, the switch 105 is closed and the branching unit 104 and the capacitor 106 are electrically connected (ON state). When the amplification apparatus 100 is selected as the standby system, the switch 105 is opened, and the branching portion 104 and the capacitor 106 are not electrically connected (off state). The capacitor 106 is a bypass capacitor, and supplies a high-frequency signal output from the switch 105 to the output terminal 107 and prevents a DC voltage output from the switch 112 from flowing into the switch 105 side. The output terminal 107 outputs a high-frequency signal supplied from the capacitor 106 and a direct-current voltage supplied from the coil 111, and supplies it to the input terminal 301.

  The detection unit 108 detects the state of the high-frequency signal supplied from the branch unit 102 and notifies the control unit 110 of the state. More specifically, the detection unit 108 detects the signal level of the high frequency signal and notifies the control unit 110 of the signal level. Similarly, the detection unit 109 detects the signal level of the high-frequency signal of the high-frequency signal supplied from the branch unit 102 and notifies the control unit 110 of it. The control unit 110 detects the gain obtained by the amplifier 103 from the high-frequency signals detected by the detection units 108 and 109, and controls the states of the switches 105 and 112 according to the state of the high-frequency signal or the gain state. Information is exchanged with the control unit 210 of the amplification device 200. The coil 111 is a choke coil and prevents a high frequency signal from flowing into the switch 112 side. When the switch 112 is controlled by the control unit 110 and is turned on, the DC power source 113 and the output terminal 107 are electrically connected, and the DC voltage output from the DC power source 113 is supplied to the coil 111. To the output terminal 107. The DC power supply 113 generates and outputs a DC voltage of about 3 to 5 V, for example.

  Note that the amplification device 200 has the same configuration as the amplification device 100, and thus the description thereof is omitted.

  The selection device 300 includes input terminals 301 and 302, coils 303 and 304, diodes 305 and 306, capacitors 307 and 308, a voltage dividing unit 309, a switch module 310 having a switch 311, a capacitor 312, a coil 313, and an output terminal 314. have.

  Here, the input terminal 301 is a terminal for inputting a signal output from the output terminal 107 of the amplifying apparatus 100. The input terminal 302 is a terminal for inputting a signal output from the output terminal 207 of the amplification device 200. The output terminals 107 and 207 and the input terminals 301 and 302 are directly connected or connected via a signal line or the like. The coil 303 is a choke coil, and prevents a high frequency signal from flowing into the diode 305 and the voltage divider 309 side. Similarly, the coil 304 is a choke coil and prevents a high-frequency signal from flowing into the diode 306 side. The diode 305 and the diode 306 constitute a diode-OR circuit, and supplies a DC voltage supplied from either the input terminal 301 or the input terminal 302 to the power supply terminal (Vcc) of the switch module 310 as a power supply voltage.

  The capacitor 307 is a bypass capacitor, passes a high-frequency signal input from the input terminal 301 and supplies it to the switch module 310, and prevents a DC voltage from flowing into the switch module 310 side. Similarly, the capacitor 308 is a bypass capacitor, and passes a high-frequency signal input from the input terminal 302 and supplies it to the switch module 310, and prevents a DC voltage from flowing into the switch module 310 side. The voltage dividing unit 309 divides the voltage applied to the anode of the diode 305 at a predetermined voltage dividing ratio and supplies the divided voltage to the switch 311 of the switch module 310 as a control signal.

  The switch module 310 includes, for example, a switch 311 and a drive circuit (not shown), and changes the connection state of the switch 311 according to a control signal supplied from the voltage dividing unit 309. The switch 311 is configured by, for example, a semiconductor switch or an electromagnetic switch, and the connection state changes according to a control signal (DC voltage) supplied from the voltage dividing unit 309. Capacitor 312 and coil 313 constitute a high-pass filter, pass only a high-frequency signal, and attenuate and output a signal in a band having a frequency lower than that of the high-frequency signal. The output terminal 314 supplies the high-frequency signal output from the capacitor 312 to a subsequent device.

(B) Description of Operation of First Embodiment of the Invention Next, operation of the first embodiment will be described. Hereinafter, a case where the amplifying apparatus 100 is set to the active system and the amplifying apparatus 200 is set to the standby system will be described as an example.

  For example, an operation for setting the amplification device 100 to the active system is performed on an input switch (not shown) connected to the control unit 110, and the amplification device 200 is set on an input switch (not shown) connected to the control unit 210. Is set to be a standby system. In such a case, the control unit 110 turns on both the switch 105 and the switch 112, and the control unit 210 turns off both the switch 205 and the switch 212. When both the switch 205 and the switch 212 are turned off, no signal is output from the output terminal 207 of the amplifying apparatus 200.

  In the amplifying apparatus 100, the high frequency signal input from the input terminal 101 is branched by the branching unit 102 and supplied to the amplifying unit 103 and the detecting unit 108. The detection unit 108 detects the signal level of the high frequency signal, the modulation error ratio, the bit error rate, and the like, and notifies the control unit 110 of the detected signal level. The control unit 110 determines the state of the input high-frequency signal based on the information notified from the detection unit 108 and determines whether or not the high-frequency signal before amplification of the amplification unit 103 is normal. The high frequency signal output from the branching unit 102 is amplified by the amplification unit 103 with a predetermined gain. The high frequency signal output from the amplifying unit 103 is branched by the branching unit 104 and supplied to the switch 105 and the detection unit 109. The detection unit 109 detects the signal level of the high-frequency signal and notifies the control unit 110 of it. Based on the information notified from the detection unit 109, the control unit 110 determines whether the high-frequency signal amplified by the amplification unit 103 is normal.

  The switch 105 is turned on when the amplifying apparatus 100 is set as the active system, so that the high frequency signal output from the branching unit 104 is supplied to the capacitor 106. The capacitor 106 passes and outputs the high frequency signal supplied from the switch 105. The switch 112 is turned on when the amplifying apparatus 100 is set as an active system, so that a DC voltage of about 3 to 5 V output from the DC power supply 113 is output from the switch 112 and supplied to the coil 111. Is done. The coil 111 passes and outputs the DC voltage supplied from the switch 112. As a result, a signal in which the high-frequency signal output from the capacitor 106 and the DC voltage output from the coil 111 are superimposed is output from the output terminal 107.

  As described above, since the switch 205 and the switch 212 are set in the OFF state, no signal is input to the input terminal 302 of the selection device 300, while the high frequency signal and the DC voltage are superimposed on the input terminal 301. The signal is input from the amplifying apparatus 100.

  The capacitor 307 passes and outputs a high frequency signal among the signals input from the input terminal 301. As a result, a high frequency signal is supplied to the upper terminal of the switch 311 in FIG. On the other hand, the coil 303 passes and outputs a DC voltage among signals input from the input terminal 301. As a result, since a DC voltage is applied to the voltage dividing unit 309, a predetermined voltage obtained by dividing the input DC voltage is output from the voltage dividing unit 309. Note that the DC voltage output from the coil 303 is supplied to the power supply terminal (Vcc) of the switch module 310 via the diode 305. The switch module 310 operates using a DC voltage supplied to the power supply terminal via the diode 305 as a power source. At this time, since the diode 306 is in a reverse bias state, no DC voltage is supplied to the coil 304 side. Since the voltage output from the voltage dividing unit 309 is supplied to the switch 311 of the switch module 310, the switch 311 is connected to the upper terminal in FIG. As described above, since the high frequency signal is supplied to the upper terminal of the switch 311, the high frequency signal is output from the switch 311 to the capacitor 312. Capacitor 312 and coil 313 pass and output the high-frequency signal supplied from switch 311, and block signals having a frequency lower than that of the high-frequency signal. As a result, the high frequency signal amplified in the amplifying apparatus 100 is output from the output terminal 314.

  Assume that in such a state, it is determined that the state of the high-frequency signal detected by the detection unit 109 has deteriorated. For example, assume that the signal level is less than a predetermined level. Then, the control unit 110 refers to the output of the detection unit 108, and similarly indicates that the output of the detection unit 108 indicates that the state of the high-frequency signal has deteriorated (in this example, the signal level is a predetermined level). If the level is less than the level), it is determined that an abnormality has occurred in the host device, and the switching process as described later is not executed. On the other hand, when the output of the detection unit 108 is normal (in this example, the signal level is equal to or higher than a predetermined level), it is determined that an abnormality has occurred in the amplification unit 103, and a switching process described later is performed. Run.

  In the switching process, the control unit 110 notifies the control unit 210 that switching from the active system to the standby system is performed, and the switch 105 and the switch 112 are turned off. When the switch 105 is turned off, the high frequency signal output from the branching unit 104 is not supplied to the output terminal 107. When the switch 112 is turned off, the DC voltage output from the DC power supply 113 is not supplied to the output terminal 107.

  When no DC voltage is output from the output terminal 107, no voltage is applied to the voltage dividing unit 309, and thus no DC voltage is output from the voltage dividing unit 309. As a result, the switch 311 is connected to the lower terminal of FIG.

  In the amplification unit 200, the control unit 210 that has received a notification from the control unit 110 that the active system is to be switched to the standby system changes the switch 205 and the switch 212 from the off state to the on state. As a result, the high frequency signal amplified by the amplifying unit 203 and passing through the branching unit 204 is output from the output terminal 207 via the capacitor 206. Further, the DC voltage output from the DC power source 213 is output from the output terminal 207 via the coil 211. As a result, a signal in which a high-frequency signal and a DC voltage are superimposed is input to the input terminal 302. The coil 304 passes a DC voltage from the signal input from the input terminal 302 and supplies it as a power supply voltage to the power supply terminal (Vcc) of the switch module 310 via the diode 306. At this time, since the diode 305 is in a reverse bias state, no DC voltage is supplied to the coil 303 side. The capacitor 308 passes a high-frequency signal among the signals input from the input terminal 302 and supplies the high-frequency signal to the switch 311. As described above, since the switch 311 is connected to the lower terminal in FIG. 1, the high-frequency signal supplied via the capacitor 308 is supplied to the capacitor 312 via the switch 311. Since the capacitor 312 and the coil 313 constitute a high-pass filter, the high-frequency signal supplied to the capacitor 312 is passed and supplied to the subsequent device via the output terminal 314.

  As described above, in the first embodiment of the present invention, the amplifying apparatus superimposes and outputs a DC voltage on the high-frequency signal, and the selection apparatus 300 switches the switch 311 according to the presence or absence of the DC voltage. So, I switched from the working system to the standby system. For this reason, since the switching is performed by the switch 311 having almost no insertion loss as compared with the branching unit, it is not necessary to increase the gain of the amplifying unit 103, so that a desired gain can be obtained without deteriorating the distortion of the output signal. It becomes possible. In addition, it is possible to reliably switch from the active system to the standby system with a simple configuration. Furthermore, since the DC voltage supplied from the amplifier is used as the power supply power in the selection device 300, it is not necessary to provide a power supply unit on the selection device 300 side, so that the configuration of the device can be simplified. it can.

(C) Description of Configuration of Second Embodiment of Present Invention Next, a second embodiment of the present invention will be described. FIG. 2 is a diagram illustrating a configuration example of the second embodiment of the present invention. In FIG. 2, parts corresponding to those in FIG. In FIG. 2, when comparing FIG. 1, the amplification device 100 is replaced with the amplification device 100 </ b> A, and the selection device 300 is replaced with the selection device 300 </ b> A. Other configurations are the same as those in FIG.

  Here, as compared with the amplification device 100, the amplification device 100A excludes the capacitor 106, the coil 111, the switch 112, and the DC power supply 113. Further, in the selection device 300A, compared to the selection device 300, the coil 303, the diodes 305 and 306, and the capacitor 307 are excluded, the switch module 310 is replaced with the switch module 310A, and the voltage dividing unit 309 is connected from the anode side of the diode 305. The connection destination is changed to the power supply terminal side of the switch module 310A. In the switch module 310A, when the power supply voltage is not supplied to the power supply terminal (Vcc), the switch 311 selects the upper terminal in FIG. 2, while the power supply voltage is supplied and the voltage dividing unit When a control signal is supplied from 309, the lower terminal in FIG. 2 is selected. Other configurations are the same as those in FIG.

(D) Description of Operation of Second Embodiment of the Invention Next, the operation of the second embodiment will be described. Hereinafter, a case where the amplification device 100A is set to the active system and the amplification device 200 is set to the standby system will be described as an example.

  For example, an operation of setting the amplification device 100A to the active system is performed on an input switch (not shown) connected to the control unit 110, and the amplification device 200 is set on an input switch (not shown) connected to the control unit 210. Is set to be a standby system. In such a case, the control unit 110 turns on the switch 105, and the control unit 210 turns off both the switch 205 and the switch 212. When both the switch 205 and the switch 212 are set to the off state, no signal is output from the output terminal 207 of the amplifying apparatus 200.

  In the amplifying apparatus 100A, the high frequency signal input from the input terminal 101 is supplied to the amplifying unit 103 via the branching unit 102, amplified with a predetermined gain, and then supplied to the switch 105 via the branching unit 104. . Note that the detection unit 108 and the detection unit 109 detect the states of the input signal and the output signal of the amplification unit 103 supplied from the branch unit 102 and the branch unit 104, respectively, and notify the control unit 110 of the detected states. When the state of the input signal and the output signal of the amplifying unit 103 is normal, the control unit 110 keeps the switch 105 on. The high frequency signal output from the branch unit 104 is output via the switch 105 and the output terminal 107.

  As described above, since no signal is output from the amplifying apparatus 200, no DC voltage is output from the voltage dividing unit 309. In this case, since the DC voltage is not supplied to the power supply terminal (Vcc) of the switch module 310A, the switch 311 is in a state where the upper terminal in FIG. 2 is selected. As a result, the high frequency signal input via the input terminal 301 is supplied to the capacitor 312 via the switch 311. The high-frequency signal output from the switch 311 passes through a high-pass filter constituted by the capacitor 312 and the coil 313 and is output from the output terminal 314.

  In the state as described above, if an abnormality of the high frequency signal is detected by the detection unit 109, the control unit 110 refers to the output of the detection unit 108, and the amplification unit 103 is abnormal when the high frequency signal is normal. The control unit 210 is notified of switching from the active system to the standby system, and the switch 105 is turned off. When the switch 105 is turned off, a high frequency signal is not output from the output terminal 107.

  When the control unit 210 receives a notification from the control unit 110 to switch from the active system to the standby system, the control unit 210 changes the switch 205 and the switch 212 from the off state to the on state. As a result, the high-frequency signal amplified by the amplifying unit 203 and passing through the branching unit 204 is output from the output terminal 207 via the switch 205 and the capacitor 206. Further, the DC voltage output from the DC power source 213 is output from the output terminal 207 via the coil 211. Thereby, a signal in which the high-frequency signal and the DC voltage are superimposed is input to the input terminal 302 of the selection device 300A.

  The coil 304 passes a DC voltage from the signal input from the input terminal 302 and supplies it as a power supply voltage to the power supply terminal (Vcc) of the switch module 310. The voltage divider 309 divides the DC voltage output from the coil 304 and supplies it to the switch 311. When the DC voltage is supplied from the voltage dividing unit 309, the switch 311 is connected to the lower terminal in FIG.

  The capacitor 308 passes a high-frequency signal among the signals input from the input terminal 302 and supplies the signal to the switch 311. As described above, since the switch 311 is connected to the lower terminal in FIG. 1, the high-frequency signal supplied via the capacitor 308 is supplied to the capacitor 312 via the switch 311. Since the capacitor 312 and the coil 313 constitute a high-pass filter, the high-frequency signal supplied to the capacitor 312 is passed and supplied to the subsequent device via the output terminal 314.

  As described above, in the second embodiment of the present invention, since the switching is performed by the switch 311 having almost no loss, it is possible to obtain a desired gain without deteriorating the distortion of the output signal. The switch module 310A selects the upper terminal in FIG. 2 when the power supply voltage is not supplied. For this reason, when the amplifying apparatus 100A is used as an active system, it operates without receiving supply of power, so that power consumption can be reduced. Further, when an abnormality occurs in the amplification unit 103 of the amplification device 100A, the amplification device 200 superimposes and outputs a DC voltage on the high-frequency signal, and the selection device 300A switches the switch 311 so that the active system is switched. Therefore, the active system and the standby system can be switched reliably with a simple configuration. In addition, since the DC voltage supplied from the amplifying apparatus 200 is used as the power supply power in the selection apparatus 300A, it is not necessary to provide a power supply unit on the selection apparatus 300A side, thereby simplifying the configuration of the apparatus. Can do.

(C) Description of Modified Embodiment The above embodiment is an example, and the present invention is not limited to the case described above. For example, in the first embodiment shown in FIG. 1, when a DC voltage is supplied from the amplification device 100, the voltage is supplied to the switch 311 via the voltage dividing unit 309, and the switch 311 selects the upper terminal. For example, when the voltage divider 309 is connected to the anode side of the diode 306 and a DC voltage is supplied from the amplifier 200, the voltage is supplied to the switch 311 via the voltage divider 309, and the switch 311 is connected to the lower terminal. In other cases, the upper terminal may be selected.

  Further, in the second embodiment shown in FIG. 2, a DC power supply 213 is provided in the standby system amplifying apparatus 200, and when switching from the active system to the standby system, a DC voltage is supplied from the standby system to change the connection of the switch 311. However, a DC power source may be provided in the amplification device 100A that is the active system. In that case, the switch module 310A causes the switch 311 to select the lower terminal when the power supply voltage is not supplied, the power supply voltage is supplied, and when the DC voltage is supplied from the voltage dividing unit 309, the switch 311 The upper terminal may be selected.

  In each of the above embodiments, the output of the high frequency signal is stopped by the switches 105 and 205. For example, the output of the high frequency signal is stopped by stopping the operation of the amplifying units 103 and 203. May be.

  Further, in each of the embodiments described above, the switch 311 is configured by a semiconductor switch, but may be configured by, for example, an electromagnetic switch. In that case, when the power supply voltage is supplied to the electromagnetic coil that drives the switch, one of the amplification devices can be selected, and when the supply of the power supply voltage is stopped, the other amplification device can be selected.

  Further, the capacitors 106, 206, 307, 308, 312 and the coils 111, 211, 303, 304, 313, etc. may be omitted as appropriate.

  Further, in each of the above embodiments, the amplifying devices 100, 100A, and 200 are each configured to include the control units 110, 110, and 210. However, if necessary, one of the amplifying devices that configure the redundant amplifying system 10 is used. The amplification device may have a control unit, and the control unit may also control the other amplification device. With such a configuration, the configuration of the redundant amplification system can be simplified.

  In the above embodiment, the detection units 108, 109, 208, and 209 detect the signal level of the high frequency signal. However, the quality of the other high frequency signal may be detected. For example, the detection units 108, 109, 208, and 209 may detect a modulation error ratio (MER) or a bit error rate (BER) of a high frequency signal, A detection unit may be provided separately to detect MER, BER, and the like. By setting it as such a structure, an amplifier can be switched according to the quality of a high frequency signal.

  Moreover, you may make it accommodate an amplifier and a selection apparatus in the housing | casing as shown in FIG. In the example illustrated in FIG. 3, the casing 120 accommodates the amplification device 100 (or the amplification device 100A). The amplifying apparatus 200 is housed in the housing 220. Further, the housing 320 accommodates the selection device 300 (or the selection device 300A) and a distribution device (not shown). The housing 120 is constituted by, for example, a metal member 121 having a rectangular parallelepiped shape. Similarly, the housing 220 is configured by a metal member 221 having a rectangular parallelepiped shape, for example. The housing 120 and the housing 220 are arranged so that predetermined side surfaces face each other in parallel. A connection terminal 123 and a connection terminal 223 are provided on the back surface 121a and the back surface 221a of the housing 120 and the housing 220, respectively. Further, an output terminal 107, an output terminal 207, an input terminal 101, and an input terminal 201 are arranged below the connection terminal 123 and the connection terminal 223 (downward in FIG. 3).

  The housing 320 is constituted by a metal member 321 having a rectangular parallelepiped shape, for example. An input terminal 322 and an output terminal 314 are disposed on the surface 321 a of the housing 320. As shown in the lower part of FIG. 3, input terminals 301 and 302 and output terminals 323 and 324 are arranged on a surface 321 b (surface facing the surface 321 a) of the housing 320. The housing 320 is connected to the housings 120 and 220 so that the output terminal 323 and the input terminal 101, the output terminal 324 and the input terminal 201, the input terminal 301 and the output terminal 107, and the input terminal 302 and the output terminal 207 are connected to each other. Join. As a result, the housing 320 is disposed in a state where the housing 120 and the back surface 121a and the back surface 221a of the housing 220 are bridged.

  Here, when a high frequency signal is input to the input terminal 322, the high frequency signal input to the input terminal 322 is distributed by a distribution device (not shown) accommodated in the housing 320 and output from the output terminals 323 and 324. Is done. High frequency signals output from the output terminals 323 and 324 are input from the input terminals 101 and 201 to the casings 120 and 220, respectively. The amplifying apparatus shown in FIG. 1 or FIG. 2 is accommodated in the casings 120 and 220, and the input high-frequency signal is amplified and output by the amplifying apparatus set in the active system. The signals output from the output terminals 107 and 207 are selected by the selection device 300 accommodated in the housing 320 and output from the output terminal 314. Note that the control unit 110 and the control unit 210 can exchange information with each other via cables connected to the connection terminals 123 and 223. Further, since power source power is supplied to the connection terminals 123 and 223, the amplifying devices 100 and 200 operate with this power source power. Furthermore, since the selection device 300 operates using the DC voltage supplied from the active amplification device as a power supply voltage, it is not necessary to arrange a power supply circuit in the housing 320.

  According to the configuration shown in FIG. 3 above, the distribution device and the selection device are accommodated in the same housing 320 and can be arranged so as to be bridged between the back surface 121a and the back surface 221a of the housings 120 and 220. Space required for installation of the apparatus can be reduced. In addition, since it is not necessary to arrange a power supply circuit in the housing 320, the size of the housing 320 can be reduced, and by removing a power supply circuit with much noise generation from the housing 320, noise can be reduced. The characteristics can be improved.

  In the example shown in FIG. 3, the long sides of the back surface 121a and the back surface 221a of the housing 120 and the housing 220 are arranged so as to face the vertical direction. However, as shown in FIG. You may arrange so that it may face. In FIG. 4, parts corresponding to those in FIG. In FIG. 4, the arrangement direction of the housing 120 and the housing 220 is changed as compared with FIG. 3, and the housing 320 is replaced with the housing 420.

  Here, the housing 120 and the housing 220 have the same configuration as that in FIG. 3, and the input terminals 101 and 201, the output terminals 107 and 207, the connection terminals 123 and 223, and the internal configuration are also the same as those in FIG. It is. The housing 420 is configured by a housing 120 and a metal member 421 having a shape corresponding to the change in the arrangement of the housing 220. That is, the housing 420 has a shape that is long in the horizontal direction of FIG. 4 so that the input terminals 301, the output terminals 323, the output terminals 324, and the input terminals 302 that are arranged in a row can be arranged. It has a shape in which the width in the direction is substantially the same as that of the casings 120 and 220.

  An input terminal 322 and an output terminal 314 are provided on a surface 421a of the housing 420, and an input terminal 301, an output terminal 323, an output terminal 324, and an input terminal 302 are provided on a surface 421b facing the surface 421a. ing. The housing 420 is connected to the housings 120 and 220 so that the input terminal 301 and the output terminal 107, the output terminal 323 and the input terminal 101, the output terminal 324 and the input terminal 201, and the input terminal 302 and the output terminal 207 are connected to each other. Join. As a result, the housing 420 is disposed in a state where the housing 120 and the back surface 121a and the back surface 221a of the housing 220 are bridged.

  Here, when a high frequency signal is input to the input terminal 322, the high frequency signal input to the input terminal 322 is distributed by a distribution device (not shown) accommodated in the housing 320 and output from the output terminals 323 and 324. Is done. High frequency signals output from the output terminals 323 and 324 are input from the input terminals 101 and 201 to the casings 120 and 220, respectively. The amplifying apparatus shown in FIG. 1 or FIG. 2 is accommodated in the casings 120 and 220, and the input high-frequency signal is amplified and output by the amplifying apparatus set in the active system. The signals output from the output terminals 107 and 207 are selected by the selection device 300 accommodated in the housing 420 and output from the output terminal 314. Note that the control unit 110 and the control unit 210 can exchange information with each other via cables connected to the connection terminals 123 and 223. Further, since power source power is supplied to the connection terminals 123 and 223, the amplifying devices 100 and 200 operate with this power source power. Furthermore, since the selection device 300 operates using the DC voltage supplied from the current amplification device as the power supply voltage, it is not necessary to arrange a power supply circuit in the housing 420.

  According to the configuration shown in FIG. 4 above, the distribution device and the selection device are accommodated in the same housing 420 and can be arranged so as to be bridged between the back surface 121a and the back surface 221a of the housings 120 and 220. Space required for installation of the apparatus can be reduced. In addition, since it is not necessary to arrange a power supply circuit in the housing 420, the size of the housing 420 can be reduced, and by removing a power supply circuit that generates a lot of noise from the housing 420, noise can be reduced. The characteristics can be improved.

DESCRIPTION OF SYMBOLS 10 Redundant amplification system 100,200 Amplifier 101,201 Input terminal 102,104,202,204 Branch part 103,203 Amplifier 105,205 Switch 106,206 Capacitor 107,207 Output terminal 108,109,208,209 Detection Unit 110, 210 Control unit (part of control means)
111, 211 Coil 112, 212 Switch (part of control means)
113, 213 DC power supply (supply means)
120, 220, 320, 420 Case 300 Selection device 301, 302 Input terminal 303, 304 Coil 305, 306 Diode 307, 308 Capacitor 309 Voltage divider 310, 310A Switch module (output means)
311 Switch 312 Capacitor 313 Coil 314 Output terminal

Claims (5)

A first amplifying device and a second amplifying device for amplifying a high-frequency signal; and a selection device for selecting one of the first amplifying device and the second amplifying device and outputting the amplified high-frequency signal. In a redundant amplification system,
At least one of the first amplification device and the second amplification device is:
Supply means for superimposing a DC voltage on the high-frequency signal and supplying the selection device with
Control means for controlling the presence or absence of supply of the DC voltage to the selection device,
The selection device is:
Output means for selecting one of the first amplifying device and the second amplifying device and outputting the high-frequency signal according to whether or not the DC voltage is supplied ;
Extraction means for extracting the high-frequency signal from the signal supplied from the supply means and supplying the high-frequency signal to the output means ,
A redundant amplification system characterized by that. Both the first amplification device and the second amplification device have the supply means,
Either one of the first amplification device and the second amplification device outputs the DC voltage superimposed on the high-frequency signal,
The output means selects one of the amplifying devices on which the DC voltage is superimposed and extracts and outputs the high-frequency signal.
The redundant amplification system according to claim 1. A first amplifying device and a second amplifying device for amplifying a high-frequency signal; and a selection device for selecting one of the first amplifying device and the second amplifying device and outputting the amplified high-frequency signal. In a redundant amplification system,
At least one of the first amplification device and the second amplification device is:
Supply means for supplying a DC voltage to the selection device;
Control means for controlling the presence or absence of supply of the DC voltage to the selection device,
The selection device is:
According to the presence or absence of the supply of the DC voltage, it has an output means for selecting one of the first amplifying device and the second amplifying device and outputting the high-frequency signal,
Only one of the first amplification device and the second amplification device has the supply means,
The supply means outputs the DC voltage superimposed on the high-frequency signal,
The output means of the selection device selects an amplification device that does not have the supply means when the DC voltage is not supplied, and selects an amplification device that has the supply means when the DC voltage is supplied. To output the high-frequency signal,
A redundant amplification system characterized by that .   4. The redundant amplification according to claim 1, wherein the selection device operates using the DC voltage supplied from the first amplification device or the second amplification device as a power supply voltage. 5. system. The first amplifying device and the second amplifying device are respectively accommodated in two housings having a rectangular parallelepiped shape, and these two housings are arranged side by side so that predetermined side surfaces face each other in parallel,
The selection device is housed in a housing having a rectangular parallelepiped shape, and is arranged so as to bridge a predetermined surface of the two housings housing the first amplification device and the second amplification device. The
The redundant amplification system according to any one of claims 1 to 4, wherein

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