JP5445459B2 - Transceiver - Google Patents

Description

  The present invention relates to a transceiver, and more particularly to a transceiver capable of transmitting and receiving signals of a plurality of wireless standards or a plurality of bands (band groups).

  Non-Patent Document 1 discloses a configuration example of a transceiver capable of transmitting and receiving signals of a plurality of wireless standards or a plurality of bands (band groups) (hereinafter simply referred to as a plurality of wireless systems). The transceiver disclosed in Non-Patent Document 1 is used for transmitting and receiving signals of a plurality of wireless systems by one chip.

  FIG. 21 is a diagram illustrating a configuration of a transmission / reception circuit disclosed in Non-Patent Document 1. As shown in FIG. 21, this transmission / reception circuit includes a VCO (Voltage Controlled Oscillator) 5113, a reception circuit 5101 corresponding to the first radio system, a reception circuit 5102 corresponding to the second radio system, A transmission circuit 5103 corresponding to the wireless system, a transmission circuit 5104 corresponding to the second wireless system, and a frequency converter 5116 are provided.

  The reception circuit 5101 includes a first analog down-converter 5105 and a first digital down-converter 5106. A reception RF (Radio Frequency) signal 5151 corresponding to the first wireless system is input to the reception circuit 5101, and the first wireless system A reception BB (Base Band) signal 5155 corresponding to is output. The reception circuit 5102 includes a second digital down-converter 5107 and a second analog down-converter 5108, and receives a reception RF signal 5152 corresponding to the second wireless system and receives corresponding to the second wireless system. The BB signal 5156 is output.

  The transmission circuit 5103 includes a first analog up-converter 5109 and a first digital up-converter 5110, receives a transmission BB signal 5157 corresponding to the first wireless system, and corresponds to the first wireless system. A transmission RF signal 5153 is output. The transmission circuit 5104 includes a second digital up-converter 5111 and a second analog up-converter 5112, inputs a transmission BB signal 5158 corresponding to the second wireless system, and corresponds to the second wireless system. A transmission RF signal 5154 is output.

  An output signal 5159 of the VCO 5113 is input to the frequency converter 5116, the second analog down converter 5108, and the second analog up converter 5112. The frequency converter 5116 receives the output signal 5159, performs frequency conversion, and outputs the converted signal to the first analog up-converter 5109 and the first analog down-converter 5105.

  Next, the operation of the transmission / reception circuit shown in FIG. 21 will be described. Here, it is assumed that a direct conversion method in which the carrier signal frequency and the local signal frequency are equal is used. First, when operating the transmission / reception circuits 5101 and 5103 corresponding to the first radio system, the frequency of the VCO 5113 is adjusted so as to be equal to N times the carrier frequency. In order to adjust the frequency, feedback loop control such as PLL (Phase Locked Loop) is usually used. Therefore, it takes time to stabilize the frequency. After the frequency adjustment, received RF signal 5151 is down-converted by local signal 5160 and converted to received BB signal 5155. On the other hand, transmission RF signal 5153 is generated by up-converting transmission BB signal 5157 with local signal 5160. It is assumed that frequency converter 5116 multiplies the input frequency by 1 / N.

  Next, when operating the transmission / reception circuits 5102 and 5104 corresponding to the second wireless system, the frequency of the VCO 5113 is adjusted again so as to be equal to the carrier frequency. Again, it takes time for the frequency to stabilize. After the frequency adjustment, the reception RF signal 5152 is down-converted by the local signal 5159 and the transmission BB signal 5158 is up-converted as in the case corresponding to the first radio system.

  Patent Document 1 discloses a configuration example of a wireless device compatible with a plurality of wireless communication systems. In particular, the second embodiment describes a dual-mode oscillator incorporating a first voltage-controlled oscillator and a second voltage-controlled oscillator that are switched by those of GSM900 or DCS1800.

JP 2003-8454 A

Journal of Solid State Circuits, page 1524 Figure 3 (IEEE OF SOLID-STATE CIRCUITS, 2008)

  However, there is a problem with the configuration of the transceiver disclosed in Non-Patent Document 1. That is, there is a problem that it is not possible to operate simultaneously corresponding to a plurality of wireless systems. The cause of this problem is that the frequency adjustment of the VCO is required for each carrier signal frequency of each wireless system, and that the time required for this frequency adjustment is long.

  On the other hand, the wireless device disclosed in Patent Document 1 corresponds to a plurality of wireless systems by switching paths in the quadrature modulator output signal separation means, and enables simultaneous operation in the plurality of wireless systems. is not.

  An object of the present invention is to provide a transceiver capable of operating simultaneously in a plurality of wireless systems.

  The transceiver of the present invention includes a first communication circuit corresponding to a first wireless system, a second communication circuit corresponding to a second wireless system, the first communication circuit, and the second communication circuit. An oscillator that generates a common frequency signal common to both of them, and a frequency that converts the frequency of the common frequency signal generated by the oscillator and supplies a local signal to the first communication circuit or the second communication circuit And a converter.

  ADVANTAGE OF THE INVENTION According to this invention, the transmitter / receiver which can operate | move simultaneously with a some radio | wireless system can be provided.

It is a block diagram which shows the basic composition of the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 2 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 3 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 4 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 5 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 6 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 7 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 8 of invention. It is a block diagram which shows the structure of the radio | wireless transmitter / receiver concerning Embodiment 9 of invention. It is a figure which shows the specific structure which applied the transmission / reception circuit concerning Embodiment 5 of invention to UWB. It is a figure which shows the 1st specific structure which applied the transmission / reception circuit concerning Embodiment 6 of invention to UWB. It is a figure which shows the 2nd specific structure which applied the transmission / reception circuit concerning Embodiment 6 of invention to UWB. It is a figure which shows the specific 1st circuit of VCO in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the concrete 2nd circuit of VCO in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the concrete 3rd circuit of VCO in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the specific 1st circuit of the frequency converter in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the concrete 2nd circuit of the frequency converter in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the specific 3rd circuit of the frequency converter in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a figure which shows the concrete 4th circuit of the frequency converter in the radio | wireless transmitter / receiver concerning Embodiment 1 of invention. It is a block diagram which shows the structure of the transmitter / receiver concerning background art. It is a figure which shows the UWB band group defined by the WiMedia standard. It is a figure which shows the band of the 1st concrete structure which applied the transmission / reception circuit concerning Embodiment 5 of invention to UWB. It is a figure which shows the band of the 1st concrete structure which applied the transmission / reception circuit concerning Embodiment 6 of invention to UWB. It is a figure which shows the band of the 2nd concrete structure which applied the transmission / reception circuit concerning Embodiment 6 of invention to UWB. It is the figure which showed the operation | movement waveform of the power control in the transmitter / receiver concerning Embodiment 5 of invention.

Embodiment 1 of the Invention
A transceiver according to a first embodiment of the present invention will be described in detail with reference to the drawings. The transceiver is a wireless communication device capable of transmitting and receiving signals of a plurality of wireless standards or a plurality of bands (band groups). FIG. 1 shows the basic configuration of the transceiver. As shown in FIG. 1, the transceiver includes a first communication circuit 1a corresponding to the first wireless system, a second communication circuit 1b corresponding to the second wireless system, and a first communication circuit 1a. An oscillator 2 that generates a common frequency signal common to both of the second communication circuits 1b, and a frequency conversion of the common frequency signal generated by the oscillator 2 to the first communication circuit 1a or the second communication circuit 1b Frequency converters (here, the first frequency converter 3a and the second frequency converter 3b) for supplying local signals.

  As described above, in the transceiver, the common frequency signal common to both the first communication circuit 1a and the second communication circuit 1b is generated by the oscillator 2, and these signals are generated by the first frequency converter 3a and the second frequency signal. Conversion is performed so that either one or both of the frequency converters 3b can be supplied as a local signal to the first communication circuit 1a and the second communication circuit 1b. Therefore, it is not necessary to adjust the oscillator 2 between the case where communication is performed using the first wireless system and the case where communication is performed using the second wireless system, and therefore it is possible to operate simultaneously on a plurality of wireless systems.

FIG. 2 is a block diagram showing a configuration of the transceiver according to the first embodiment of the invention.
The transceiver includes a receiving circuit 1101 corresponding to the first wireless system, a receiving circuit 1102 corresponding to the second wireless system, a transmitting circuit 1103 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1104, first VCO 1113, second VCO 1114, third VCO 1115, first frequency converter 1116, second frequency converter 1117, and third frequency converter 1118. And a fourth frequency converter 1119.

  Here, a reception circuit 1101 corresponding to the first wireless system and a transmission circuit 1103 corresponding to the first wireless system constitute a first communication circuit corresponding to the first wireless system. The receiving circuit 1102 corresponding to the second wireless system and the transmitting circuit 1104 corresponding to the second wireless system constitute a second communication circuit corresponding to the second wireless system. Further, the first VCO 1113 functions as an oscillator that generates a common frequency signal common to both the first communication circuit and the second communication circuit. Furthermore, the first frequency converter 1116 and the second frequency converter 1117 perform frequency conversion on the common frequency signal generated by the first VCO 1113, and the first frequency converter 1116 and the second frequency converter 1117 It functions as a frequency converter that supplies local signals.

  More specifically, the reception circuit 1101 corresponding to the first wireless system receives an analog down converter 1105 to which the first RF reception signal 1151 is input and an output signal from the analog down converter 1105 as an input. A first digital down converter 1106 that outputs a BB signal 1155 is provided. In this specification, the analog down converter and the analog up converter may be collectively referred to as “analog converter”, and the digital down converter and the digital up converter may be collectively referred to as “digital converter”. .

  The reception circuit 1102 corresponding to the second radio system receives the analog down converter 1108 to which the second RF reception signal 1152 is input, and the output signal from the analog down converter 1108, and outputs the reception BB signal 1156. The second digital down converter 1107 is provided.

  A transmission circuit 1103 corresponding to the first radio system inputs a first analog upconverter 1109 that outputs an RF transmission signal 1153 and a transmission BB signal 1157 and outputs an input signal to the analog upconverter 1109. A first digital upconverter 1110 is provided.

  A transmission circuit 1104 corresponding to the second wireless system inputs a second analog upconverter 1112 that outputs an RF transmission signal 1154 and a transmission BB signal 1158 and outputs an input signal to the analog upconverter 1112. A second digital up-converter 1111 is provided.

  The first VCO 1113 outputs a signal 1159 having a predetermined oscillation frequency. The signal 1159 is a common frequency signal common to the transmission / reception circuits 1101 and 1103 corresponding to the first wireless system and the transmission / reception circuits 1102 and 1104 corresponding to the second wireless system. The second VCO 1114 outputs a signal 1164 having a predetermined oscillation frequency. The third VCO 1115 outputs a signal 1165 having a predetermined oscillation frequency.

  The first frequency converter 1116 converts the frequency of the output signal 1159 of the first VCO 1113 and supplies a local signal 1160 to the first analog down converter 1105 and the first analog up converter 1109. .

  The second frequency converter 1117 converts the frequency of the output signal 1159 of the first VCO 1113 and supplies a local signal 1161 to the second analog down converter 1108 and the second analog up converter 1112. .

  The third frequency converter 1118 converts the frequency of the output signal 1164 of the second VCO 1114 and supplies a local signal 1162 to the first digital down converter 1106 and the first digital up converter 1110. .

  The fourth frequency converter 1119 converts the frequency of the output signal 1165 of the third VCO 1115 and supplies a local signal 1163 to the second digital down converter 1107 and the second digital up converter 1111. .

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, specific circuit examples of the VCO constituting the first VCO 1113, the second VCO 1114, and the third VCO 1115 will be described in detail with reference to the drawings.

  The circuit shown in FIG. 14 is an LC-VCO using an inductor. Although this type of VCO has a drawback that the area of the inductor is large, the phase noise is low and high-frequency operation is easy. Note that the area of the inductor can be reduced as the frequency increases. When a plurality of VCOs of this type are integrated, there is a problem that spurious due to inductor coupling occurs. Incidentally, the IQ signal required for quadrature modulation / demodulation can be obtained by inputting the output signal of the VCO to a polyphase filter or a frequency divider.

  The circuit shown in FIG. 15 is a non-inductor-type ring VCO that does not use an inductor. Although this type of VCO has the disadvantage that phase noise is poor and high-frequency operation is difficult, the area is small and spurious due to coupling between VCOs is small. Further, by setting the number of ring stages to an even number, an IQ signal required for orthogonal modulation / demodulation can be easily generated.

  The circuit shown in FIG. 16 is configured by combining two LC-VCOs. A feature of this type of VCO is that, in addition to the same features as the circuit shown in FIG. 14, an IQ signal required for quadrature modulation / demodulation can be generated.

  Next, specific circuit examples of the frequency converters 1116 to 1119 will be described in detail with reference to the drawings.

  The circuit shown in FIG. 17 is a 1/2 frequency converter (frequency divider) using a flip-flop. A 1 / N frequency divider (N is a natural number) can be configured by combining a plurality of flip-flops and logic circuits. Note that an injection locking type frequency divider can also be used when dividing an ultrahigh frequency input signal.

  The circuit shown in FIG. 18 is a non-integer frequency converter (frequency divider) including a multiphase clock generation circuit, a phase interpolation circuit, and an accumulator. The frequency division ratio of this frequency divider is, for example, 8 / (8 + N) (where N is an integer from 1 to 7) in the case of 45 degree phase interpolation.

  The circuit shown in FIG. 19 is a frequency converter using an SSB (Single Side Band) mixer. This type of frequency converter can increase the frequency, unlike the circuits shown in FIGS. The frequency conversion ratio is (1 ± 1 / N).

  The circuit shown in FIG. 20 is a buffer for transmitting signals when the frequency conversion ratio = 1 and the frequency between input and output is equal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal is as follows: the oscillation frequency of the first VCO 1113 is fVCO1, the oscillation frequency of the second VCO 1114 is fVCO2, the oscillation frequency of the third VCO 1115 is fVCO3, and the frequency conversion ratio of each of the frequency converters 1116 to 1119 is Assuming N / M, L / K, P / O, and R / Q, respectively, they are expressed as follows. Here, M to Q are integers of 1 or more.

The frequency of the local signal 1160 for the first analog downconverter 1105 and the first analog upconverter 1109 is as follows.

The frequency of the local signal 1161 for the second analog down converter 1108 and the second analog up converter 1112 is as follows.

The frequency of the local signal 1162 for the first digital upconverter 1110 and the first digital downconverter 1106 is as follows.

The frequency of the local signal 1163 for the second digital upconverter 1111 and the second digital downconverter 1107 is as follows.

Accordingly, the reception RF signal 1151 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1153 corresponding to the first radio system have a relationship represented by the following equation.

The reception RF signal 1152 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1154 corresponding to the second radio system have a relationship represented by the following expression.

  Thus, carrier signal frequencies of various wireless systems can be generated by appropriately selecting the values of the frequencies fVCO1, fVCO2, and fVCO3 of the first to third VCOs and the frequency conversion ratios N to Q. With such a configuration, a plurality of local signal frequencies can be generated without adjusting the VCO frequency during transmission / reception, thereby enabling simultaneous transmission / reception. In addition, although the transmitter / receiver concerning this Embodiment has shown the example of a transmission / reception structure of two radio systems, it will be understood easily by those skilled in the art that it can be extended also to transmission / reception of three or more radio systems.

  As described above, according to the transceiver according to the first embodiment, the frequency of the VCO is set in the case of performing communication corresponding to the first radio system and in the case of performing communication corresponding to the second radio system. Rather than switching and adjusting, the frequency of the VCO being transmitted / received is substantially fixed, the frequency signal generated by this VCO is converted by a frequency converter, and a local frequency having an appropriate frequency in each circuit (converter) Since the signal is generated, it is not necessary to switch the frequency of the VCO, and transmission / reception can be realized in a plurality of wireless systems at the same time. In particular, in UWB (Ultra Wide Band), the frequency control unit is comparatively large compared to other systems of about several hundred MHz, and therefore an optimal local signal can be easily generated by a frequency converter.

  The frequency fVCO1 of the first VCO 1113 is set higher than the frequencies fVCO2 and fVCO3 of the second VCO 1114 and the third VCO 1115. As a result, the sampling rate of the AD converter or DA converter can be lowered, and the design difficulty of the AD converter or DA converter is alleviated. At this time, since the first VCO 1113 needs to generate a relatively high frequency signal, it is preferable to use a VCO using an inductor as shown in FIG. In the transceiver according to the first embodiment, a common frequency signal common to the transceiver circuit corresponding to the first wireless system and the transceiver circuit corresponding to the second wireless system is generated in one first VCO 1113. Since no spurious problem due to inductor coupling occurs, a VCO using an inductor can be used.

In addition, since the frequency of the VCO of the second VCO 1114 and the third VCO 1115 is lower than that of the first VCO 1113, a ring VCO that does not use an inductor can be used, which reduces area and spurious between VCOs. It is valid.
If a high-speed AD converter or DA converter can be easily designed by miniaturization of process technology or the like, the frequency fVCO1 of the first VCO is lowered and the frequency fVCO2 of the second and third VCOs is lowered. , FVCO3 can also be set to increase.

Embodiment 2 of the Invention
Next, a transceiver according to a second embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 3 is a block diagram showing a configuration of a transceiver according to the second embodiment of the invention.
The transceiver includes a receiving circuit 1201 corresponding to the first wireless system, a receiving circuit 1202 corresponding to the second wireless system, a transmitting circuit 1203 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1204, first VCO 1213, second VCO 1214, first frequency converter 1216, second frequency converter 1217, third frequency converter 1218, and fourth frequency And a converter 1219.

  Here, the reception circuit 1201 corresponding to the first radio system receives an analog down converter 1205 to which the first RF reception signal 1251 is input, and an output signal from the analog down converter 1205 as an input, and receives a BB signal. A first digital down converter 1206 that outputs 1255 is provided.

  A reception circuit 1202 corresponding to the second radio system receives an analog down converter 1208 to which the second RF reception signal 1252 is input, and an output signal from the analog down converter 1208, and outputs a reception BB signal 1256. A second digital down converter 1207 is provided.

  A transmission circuit 1203 corresponding to the first wireless system inputs a first analog upconverter 1209 that outputs an RF transmission signal 1253 and a transmission BB signal 1257 and outputs an input signal to the analog upconverter 1209. A first digital upconverter 1210 is provided.

  A transmission circuit 1204 corresponding to the second radio system inputs a second analog up-converter 1212 that outputs an RF transmission signal 1254 and a transmission BB signal 1258 and outputs an input signal to the analog up-converter 1212. A second digital upconverter 1211 is provided.

  The first VCO 1213 outputs a signal 1259 having a predetermined oscillation frequency. The second VCO 1214 outputs a signal 1264 having a predetermined oscillation frequency.

  The first frequency converter 1216 converts the frequency of the output signal 1259 of the first VCO 1213 and supplies a local signal 1260 to the first analog down converter 1205 and the first analog up converter 1209. .

  The second frequency converter 1217 converts the frequency of the output signal 1259 of the first VCO 1213 and supplies a local signal 1261 to the second analog down converter 1208 and the second analog up converter 1212. .

  The third frequency converter 1218 converts the frequency of the output signal 1264 of the second VCO 1214 and supplies a local signal 1262 to the first digital down converter 1206 and the first digital up converter 1210. .

  The fourth frequency converter 1219 converts the frequency of the local signal 1261 supplied from the second frequency converter 1217 to the second digital down converter 1207 and the second digital up converter 1211. A local signal 1263 is supplied.

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal includes the oscillation frequency of the first VCO 1213 as fVCO1, the oscillation frequency of the second VCO 1214 as fVCO2, and the frequency conversion ratios of the frequency converters 1216 to 1219 as N / M, L / K, and P, respectively. Assuming / O and R / Q, they are expressed as follows. Here, M to Q are integers of 1 or more.

The frequency of the local signal 1260 for the first analog downconverter 1205 and the first analog upconverter 1209 is as follows.

The frequency of the local signal 1261 for the second analog down converter 1208 and the second analog up converter 1212 is as follows.

The frequency of the local signal 1262 for the first digital upconverter 1210 and the first digital downconverter 1206 is as follows.

The frequency of the local signal 1263 for the second digital upconverter 1211 and the second digital downconverter 1207 is as follows.

Accordingly, the reception RF signal 1251 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1253 corresponding to the first radio system have a relationship represented by the following equation.

The reception RF signal 1252 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1254 corresponding to the second radio system have a relationship represented by the following equation.

  With such a configuration, the transceiver according to the second embodiment of the present invention achieves the same effect as the transceiver according to the first embodiment of the invention, and further, compared with the first embodiment of the invention, the VCO Since the number is small, the area can be saved and the power consumption can be reduced.

Embodiment 3 of the Invention
Next, a transceiver according to a third embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 4 is a block diagram showing a configuration of a transceiver according to the third embodiment of the invention.
The transceiver includes a receiving circuit 1801 corresponding to the first wireless system, a receiving circuit 1802 corresponding to the second wireless system, a transmitting circuit 1803 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1804, first VCO 1813, second VCO 1814, first frequency converter 1816, second frequency converter 1817, third frequency converter 1818, and fourth frequency And a converter 1819.

  Here, the reception circuit 1801 corresponding to the first wireless system receives an analog down converter 1805 to which the first RF reception signal 1851 is input and an output signal from the analog down converter 1805 as an input, and receives a BB signal. A first digital down converter 1806 for outputting 1855 is provided.

  A reception circuit 1802 corresponding to the second wireless system receives an analog down converter 1808 to which the second RF reception signal 1852 is input, an output signal from the analog down converter 1808, and outputs a reception BB signal 1856. A second digital down converter 1807 is provided.

  A transmission circuit 1803 corresponding to the first radio system inputs a first analog upconverter 1809 that outputs an RF transmission signal 1853 and a transmission BB signal 1857 and outputs an input signal to the analog upconverter 1809. A first digital upconverter 1810 is provided.

  A transmission circuit 1804 corresponding to the second wireless system inputs a second analog up-converter 1812 that outputs an RF transmission signal 1854 and a transmission BB signal 1858 and outputs an input signal to the analog up-converter 1812. A second digital upconverter 1811 is provided.

  The first VCO 1813 outputs a signal 1859 having a predetermined oscillation frequency. The second VCO 1814 outputs a signal 1864 having a predetermined oscillation frequency.

  The first frequency converter 1816 converts the frequency of the output signal 1859 of the first VCO 1813 and supplies a local signal 1860 to the first analog down converter 1805 and the first analog up converter 1809. .

  The second frequency converter 1817 converts the frequency of the output signal 1859 of the first VCO 1813 and supplies a local signal 1861 to the second analog down converter 1808 and the second analog up converter 1812. .

  The third frequency converter 1818 converts the frequency of the output signal 1864 of the second VCO 1814 and provides a local signal 1862 to the first digital down converter 1806 and the first digital up converter 1810. .

  The fourth frequency converter 1819 converts the frequency of the output signal 1864 of the second VCO 1814 and supplies a local signal 1863 to the second digital down converter 1807 and the second digital up converter 1811. .

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal is as follows: the oscillation frequency of the first VCO 1813 is fVCO1, the oscillation frequency of the second VCO 1814 is fVCO2, and the frequency conversion ratios of the frequency converters 1816 to 1819 are N / M, L / K, P, respectively. Assuming / O and R / Q, they are expressed as follows. Here, M to Q are integers of 1 or more.

The frequency of the local signal 1860 for the first analog downconverter 1805 and the first analog upconverter 1809 is as follows.

The frequency of the local signal 1861 for the second analog downconverter 1808 and the second analog upconverter 1812 is as follows.

The frequency of the local signal 1862 for the first digital upconverter 1810 and the first digital downconverter 1806 is as follows.

The frequency of the local signal 1863 for the second digital upconverter 1811 and the second digital downconverter 1807 is as follows.

Accordingly, the reception RF signal 1851 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1853 corresponding to the first radio system have a relationship represented by the following equation.

Further, the reception RF signal 1852 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1854 corresponding to the second radio system have a relationship represented by the following expression.

  With such a configuration, the transceiver according to the third embodiment of the present invention achieves the same effect as the transceiver according to the first embodiment of the invention, and further, compared with the first embodiment of the invention, the VCO Since the number is small, the area can be saved and the power consumption can be reduced.

Embodiment 4 of the Invention
Next, a transceiver according to a fourth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 5 is a block diagram showing a configuration of a transceiver according to the fourth embodiment of the invention.
The transceiver includes a reception circuit 1301 corresponding to the first wireless system, a reception circuit 1302 corresponding to the second wireless system, a transmission circuit 1303 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1304, first VCO 1313, first frequency converter 1316, second frequency converter 1317, third frequency converter 1318, and fourth frequency converter 1319 are provided. ing.

  Here, the reception circuit 1301 corresponding to the first wireless system receives an analog down converter 1305 to which the first RF reception signal 1351 is input, and an output signal from the analog down converter 1305 as an input, and receives a BB signal. A first digital down converter 1306 for outputting 1355 is provided.

  A reception circuit 1302 corresponding to the second radio system receives an analog down converter 1308 to which the second RF reception signal 1352 is input, and an output signal from the analog down converter 1308, and outputs a reception BB signal 1356. A second digital down converter 1307 is provided.

  A transmission circuit 1303 corresponding to the first wireless system inputs a first analog upconverter 1309 that outputs an RF transmission signal 1353 and a transmission BB signal 1357 and outputs an input signal to the analog upconverter 1309. A first digital upconverter 1310 is provided.

  A transmission circuit 1304 corresponding to the second radio system inputs a second analog up-converter 1312 that outputs an RF transmission signal 1354 and a transmission BB signal 1358 and outputs an input signal to the analog up-converter 1312. A second digital up-converter 1311 is provided.

  The first VCO 1313 outputs a signal 1359 having a predetermined oscillation frequency.

  The first frequency converter 1316 converts the frequency of the output signal 1359 of the first VCO 1313 and supplies a local signal 1360 to the first analog down converter 1305 and the first analog up converter 1309. .

  The second frequency converter 1317 converts the frequency of the output signal 1359 of the first VCO 1313 and supplies a local signal 1361 to the second analog down converter 1308 and the second analog up converter 1312. .

  The third frequency converter 1318 converts the frequency of the local signal 1360 supplied from the first frequency converter 1316 to the first digital down converter 1306 and the first digital up converter 1310. A local signal 1362 is provided.

  The fourth frequency converter 1319 converts the frequency of the local signal 1361 supplied from the second frequency converter 1317 to the second digital down converter 1307 and the second digital up converter 1311. A local signal 1363 is supplied.

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal is as follows, assuming that the oscillation frequency of the first VCO 1313 is fVCO1, and the frequency conversion ratios of the frequency converters 1316 to 1319 are N / M, L / K, P / O, and R / Q, respectively. It is expressed as Here, M to Q are integers of 1 or more.

The frequency of the local signal 1360 for the first analog downconverter 1305 and the first analog upconverter 1309 is as follows.

The frequency of the local signal 1361 for the second analog down converter 1308 and the second analog up converter 1312 is as follows.

The frequency of the local signal 1362 for the first digital upconverter 1310 and the first digital downconverter 1306 is as follows.

The frequency of the local signal 1363 for the second digital upconverter 1311 and the second digital downconverter 1307 is as follows.

Accordingly, the reception RF signal 1351 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1353 corresponding to the first radio system have a relationship represented by the following equation.

Further, the reception RF signal 1352 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1354 corresponding to the second radio system have a relationship represented by the following expression.

  With such a configuration, the transceiver according to the second exemplary embodiment of the present invention achieves the same effects as the transceiver according to the first exemplary embodiment of the present invention, and further compared to the first, second, and third exemplary embodiments of the present invention. Thus, since the number of VCOs is small, the area can be saved and the power consumption can be reduced.

Embodiment 5 of the Invention
Next, a transceiver according to a fifth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 6 is a block diagram showing a configuration of a transceiver according to the fifth embodiment of the invention.
The transceiver includes a receiving circuit 1401 corresponding to the first wireless system, a receiving circuit 1402 corresponding to the second wireless system, a transmitting circuit 1403 corresponding to the first wireless system, and a second wireless system. A corresponding transmission circuit 1404, a first VCO 1413, a second VCO 1414, a first frequency converter 1416, a second frequency converter 1417, and a third frequency converter 1418 are provided.

  Here, the reception circuit 1401 corresponding to the first radio system receives an analog down converter 1405 to which the first RF reception signal 1451 is input and an output signal from the analog down converter 1405 as an input, and receives a BB signal. A first digital down converter 1406 that outputs 1455 is provided.

  A reception circuit 1402 corresponding to the second radio system receives an analog down converter 1408 to which the second RF reception signal 1452 is input, and an output signal from the analog down converter 1408, and outputs a reception BB signal 1456. A second digital down converter 1407 is provided.

  A transmission circuit 1403 corresponding to the first radio system inputs a first analog upconverter 1409 that outputs an RF transmission signal 1453 and a transmission BB signal 1457 and outputs an input signal to the analog upconverter 1409. A first digital upconverter 1410 is provided.

  A transmission circuit 1404 corresponding to the second radio system inputs a second analog up-converter 1412 that outputs an RF transmission signal 1454 and a transmission BB signal 1458 and outputs an input signal to the analog down-converter 1412. A second digital up-converter 1411 is provided.

  The first VCO 1413 outputs a signal 1459 having a predetermined oscillation frequency. The second VCO 1414 outputs a signal 1464 having a predetermined oscillation frequency.

  The first frequency converter 1416 converts the frequency of the output signal 1459 of the first VCO 1413 and supplies a local signal 1460 to the first analog down converter 1405 and the first analog up converter 1409. .

  The second frequency converter 1417 converts the frequency of the output signal 1459 of the first VCO 1413 and supplies a local signal 1461 to the second analog down converter 1408 and the second analog up converter 1412. .

  The third frequency converter 1418 converts the frequency of the output signal 1464 of the second VCO 1414 and provides a local signal 1462 to the first digital downconverter 1406 and the first digital upconverter 1410. .

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal includes the oscillation frequency of the first VCO 1413 as fVCO1, the oscillation frequency of the second VCO 1414 as fVCO2, and the frequency conversion ratios of the frequency converters 1416 to 1418 as N / M, L / K, and P, respectively. Assuming / O, it is expressed as follows. Here, M to P are integers of 1 or more.

The frequency of the local signal 1460 for the first analog downconverter 1405 and the first analog upconverter 1409 is as follows.

The frequency of the local signal 1461 for the second analog down converter 1408 and the second analog up / down converter 1412 is as follows.

The frequency of the local signal 1462 for the first digital upconverter 1410 and the first digital downconverter 1406 is as follows.

Accordingly, the reception RF signal 1451 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1453 corresponding to the first radio system have a relationship represented by the following expression.

Further, the reception RF signal 1452 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1454 corresponding to the second radio system have a relationship represented by the following expression.

  With such a configuration, the transceiver according to the fifth embodiment of the invention achieves the same effect as the transceiver according to the first embodiment of the invention, and further, the number of VCOs compared to the first embodiment of the invention. Therefore, it is possible to reduce the area and power consumption.

  An example in which the configuration shown in FIG. 6 is specifically applied to UWB (Ultra Wide Band) will be described in detail with reference to the drawings.

  FIG. 11 is a block diagram showing a configuration of a UWB transceiver that can operate simultaneously in UWB band groups 3 and 4. Since each band group is composed of 3 bands, wideband transmission is possible with this configuration having a signal band for 6 bands.

  As shown in FIG. 11, the UWB transceiver includes a reception amplifier 3101, a transmission amplifier 3102, a first analog downconverter 3103, a second analog downconverter 3104, a first analog upconverter 3105, Second analog up converter 3106, first analog BB circuit 3107, second analog BB circuit 3108, third analog BB circuit 3109, fourth analog BB circuit 3110, first digital BB circuit 3111, second Digital BB circuit 3112, third digital BB circuit 3113, fourth digital BB circuit 3114, multiplexer 3115, demultiplexer 3116, first VCO 3117, first frequency divider 3118, second frequency divider 3119, Adder circuit 3120, second VCO 3121, And a frequency divider 3122 of 3.

  Here, the reception RF signal 3151 is input to the reception amplifier 3101. The transmission RF signal 3152 is output from the transmission amplifier 3102. An output signal 3153 is output from the reception amplifier 3101, and an output signal 3155 is output from the first analog down converter 3103. An output signal 3156 is output from the second analog down converter 3104. An output signal 3157 is output from the third analog BB circuit 3109. An output signal 3158 is output from the fourth analog BB circuit 3110. An output signal 3159 is output from the first analog BB circuit 3107. An output signal 3160 is output from the second analog BB circuit 3108. An output signal 3161 is output from the third digital BB circuit 3113. An output signal 3162 is output from the fourth digital BB circuit 3114. An output signal 3163 is output from the first digital BB circuit 3111. An output signal 3164 is output from the second digital BB circuit 3112. An input signal 3165 is input to the third digital BB circuit 3113. An input signal 3166 is input to the fourth digital BB circuit 3114. An output signal 3167 is output from the multiplexer 3115. An input signal 3168 is input to the demultiplexer 3116.

  Next, specific frequency conversion of each band group will be described. First, in the band group 4, a signal 3170 obtained by frequency-dividing the oscillation frequency signal 3169 of the first VCO 3117 by two by the first frequency divider 3118 is converted into the first analog down converter 3103 and the first frequency converter 3103. Supplyed to the analog upconverter 3105.

  On the other hand, in the band group 3, the signal 3171 obtained by first dividing the oscillation frequency signal 3169 of the first VCO 3117 by 3 by the second frequency divider 3119 becomes the second analog downconverter 3104 and the second analog downconverter 3104. To the second analog up-converter 3106.

  Further, a signal 3172 obtained by dividing the oscillation frequency signal 3173 of the second VCO 3121 by 4 by the third frequency divider 3122 is supplied to the digital down converter and the digital up converter. At this time, each frequency is 17.424 GHz in the first VCO 3117, 8.712 GHz in the output of the first divider 3118, 5.808 GHz in the output of the second divider 3119, and in the second VCO 3121. 5.28 GHz, and the output of the third frequency divider 3122 is 1.32 GHz.

  FIG. 22 is a diagram showing a UWB band group defined in the WiMedia standard. FIG. 23 is a diagram illustrating a band having a specific configuration in which the fifth embodiment is applied to UWB. As shown in FIG. 23, the output frequency of the first frequency divider 3118 is the center frequency of the band group 4, and the sum of the output frequency of the second frequency divider 3119 and the output frequency of the third frequency divider 3122 is obtained. The frequency is the center frequency of band group 3. Various combinations of these frequencies can be selected.

  According to the configuration shown in FIG. 11, since the ratio band between the first transceiver and the second transceiver is small, the reception amplifier 3101 and the transmission amplifier 3102 can be shared.

Embodiment 6 of the Invention
Next, a transceiver according to a sixth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 7 is a block diagram showing a configuration of a transceiver according to the sixth embodiment of the invention.
The transceiver includes a receiving circuit 1501 corresponding to the first wireless system, a receiving circuit 1502 corresponding to the second wireless system, a transmitting circuit 1503 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1504, first VCO 1513, first frequency converter 1516, and second frequency converter 1517 are provided.

  Here, the reception circuit 1501 corresponding to the first radio system receives an analog down converter 1505 to which the first RF reception signal 1551 is input and an output signal from the analog down converter 1505 as an input, and receives a BB signal. A first digital down converter 1506 that outputs 1555 is provided.

  The reception circuit 1502 corresponding to the second radio system receives an analog down converter 1508 to which the second RF reception signal 1552 is input, an output signal from the analog down converter 1508, and outputs a reception BB signal 1556. The second digital down converter 1507 is provided.

  A transmission circuit 1503 corresponding to the first radio system inputs a first analog upconverter 1509 that outputs an RF transmission signal 1553 and a transmission BB signal 1557 and outputs an input signal to the analog upconverter 1509. A first digital upconverter 1510 is provided.

  A transmission circuit 1504 corresponding to the second radio system inputs a second analog up-converter 1512 that outputs an RF transmission signal 1554 and a transmission BB signal 1558 and outputs an input signal to the analog up-converter 1512. A second digital up-converter 1511 is provided.

  The first VCO 1513 outputs a signal 1559 having a predetermined oscillation frequency.

  The first frequency converter 1516 converts the frequency of the output signal 1559 of the first VCO 1513 and supplies a local signal 1560 to the first analog down converter 1505 and the first analog up converter 1509. .

  The second frequency converter 1517 converts the frequency of the output signal 1559 of the first VCO 1513 and supplies a local signal 1561 to the second analog down converter 1508 and the second analog up converter 1512. .

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, the operation of the transceiver of the present invention will be described in detail with reference to the drawings. The frequency of each local signal is expressed as follows, where the oscillation frequency of the first VCO 1513 is fVCO1, and the frequency conversion ratios of the frequency converters 1516 and 1517 are N / M and L / K, respectively. Here, M to K are integers of 1 or more.

The frequency of the local signal 1560 for the first analog downconverter 1505 and the first analog upconverter 1509 is as follows.

The frequency of the local signal 1561 for the second analog down converter 1508 and the second analog up converter 1512 is as follows.

Therefore, the reception RF signal 1551 corresponding to the first radio system and the carrier signal frequency fc1 of the transmission RF signal 1553 corresponding to the first radio system have a relationship represented by the following equation.

Further, the reception RF signal 1552 corresponding to the second radio system and the carrier signal frequency fc2 of the transmission RF signal 1554 corresponding to the second radio system have a relationship represented by the following expression.

  With such a configuration, the transceiver according to the sixth embodiment of the present invention achieves the same effect as the transceiver according to the first embodiment of the present invention, and further compared to the first, second, and third embodiments of the present invention. Thus, since the number of VCOs is small, the area can be saved and the power consumption can be reduced.

  In this embodiment, the output signal 1559 of the first VCO 1513 is converted into local signals 1560 and 1561 via the first frequency converter 1516 and the second frequency converter 1517. Only one of the frequency converter 1516 and the second frequency converter 1517 may be used, and the other may directly use the output signal 1559 as a local signal.

  An example in which the configuration shown in FIG. 7 is specifically applied to UWB will be described in detail with reference to the drawings.

  FIG. 12 is a block diagram showing a first configuration example of a UWB transceiver that can operate simultaneously in band groups A and B in the UWB band. Here, the band groups A and B are tentatively set frequencies that do not match the frequencies of the existing band groups. If the transmission power is reduced, the frequency can be set freely in this way even if the band arrangement of the existing standard is not satisfied. Since each band group is composed of 3 bands, wideband transmission is possible with this configuration having a signal band for 6 bands. At this time, it is assumed that one band has a 528 MHz band.

  As shown in FIG. 12, the UWB transceiver includes a reception amplifier 3201, a transmission amplifier 3202, a first analog down converter 3203, a second analog down converter 3204, a first analog up converter 3205, 2 analog up-converters 3206, a first analog BB circuit 3207, a second analog BB circuit 3208, a third analog BB circuit 3209, a fourth analog BB circuit 3210, a first digital BB circuit 3211, a second Digital BB circuit 3212, third digital BB circuit 3213, fourth digital BB circuit 3214, multiplexer 3215, demultiplexer 3216, first VCO 3217, first divider 3218, second divider 3219, An adder circuit 3220 is provided.

  Here, the reception RF signal 3251 is input to the reception amplifier 3201. The transmission RF signal 3252 is output from the transmission amplifier 3202. An output signal 3253 is output from the reception amplifier 3201, and an output signal 3255 is output from the first analog down converter 3203. An output signal 3256 is output from the second analog down converter 3204. An output signal 3257 is output from the third analog BB circuit 3209. An output signal 3258 is output from the fourth analog BB circuit 3210. An output signal 3259 is output from the first analog BB circuit 3207. An output signal 3260 is output from the second analog BB circuit 3208. An output signal 3261 is output from the third digital BB circuit 3213. An output signal 3262 is output from the fourth digital BB circuit 3214. An output signal 3263 is output from the first digital BB circuit 3211. An output signal 3264 is output from the second digital BB circuit 3212. An input signal 3265 is input to the third digital BB circuit 3213. An input signal 3266 is input to the fourth digital BB circuit 3214. An output signal 3267 is output from the multiplexer 3215. An input signal 3268 is input to the demultiplexer 3216.

  Next, specific frequency conversion of each band group will be described. First, in the band group A, a signal 3270 obtained by frequency-dividing the oscillation frequency signal 3269 of the first VCO 3217 by 2 by the first frequency divider 3218 is converted into the first analog down converter 3203 and the first frequency down converter 3203. Supplyed to the analog upconverter 3205.

  On the other hand, in the band group B, a signal 3271 obtained by dividing the oscillation frequency signal 3269 of the first VCO 3217 by 3 by the second frequency divider 3219 is the second analog down converter 3204 and the second frequency down converter 3204. The analog upconverter 3206 is supplied. At this time, each frequency is 18 GHz in the first VCO 3217, 9 GHz in the output of the first frequency divider 3218, and 6 GHz in the output of the second frequency divider 3219.

  As shown in FIG. 24, even in this configuration, since the ratio band between the first transceiver and the second transceiver is small, the reception amplifier 3201 and the transmission amplifier 3202 can be shared. The ratio band is 9/6 = 1.5.

  FIG. 13 is a block diagram illustrating a second configuration example of the UWB transceiver that can operate simultaneously in the band groups A and B of the UWB band. Here, the band groups A and B are tentatively set frequencies that do not match the frequencies of the existing band groups. If the transmission power is reduced, the frequency can be set freely in this way even if the band arrangement of the existing standard is not satisfied. Since each band group is composed of 3 bands, wideband transmission is possible with this configuration having a signal band for 6 bands. At this time, it is assumed that one band has a 528 MHz band.

  The UWB transceiver includes a reception amplifier 3301, a transmission amplifier 3302, a first analog down converter 3303, a second analog down converter 3304, a first analog up converter 3305, a second analog up converter 3306, First analog BB circuit 3307, second analog BB circuit 3308, third analog BB circuit 3309, fourth analog BB circuit 3310, first digital BB circuit 3311, second digital BB circuit 3312, third Digital BB circuit 3313, fourth digital BB circuit 3314, multiplexer 3315, demultiplexer 3316, first VCO 3317, first frequency divider 3318, and adder circuit 3320.

  Here, the reception RF signal 3351 is input to the reception amplifier 3301. The transmission RF signal 3352 is output from the transmission amplifier 3302. An output signal 3353 is output from the reception amplifier 3301. An output signal 3355 is output from the first analog down converter 3303. An output signal 3356 is output from the second analog down converter 3304. An output signal 3357 is output from the third analog BB circuit 3309. An output signal 3358 is output from the fourth analog BB circuit 3310. An output signal 3359 is output from the first analog BB circuit 3307. An output signal 3360 is output from the second analog BB circuit 3308. An output signal 3361 is output from the third digital BB circuit 3313. An output signal 3362 is output from the fourth digital BB circuit 3314. An output signal 3363 is output from the first digital BB circuit 3311. An output signal 3364 is output from the second digital BB circuit 3312. An input signal 3365 is input to the third digital BB circuit 3313. An input signal 3366 is input to the fourth digital BB circuit 3314. An output signal 3367 is output from the multiplexer 3315. An input signal 3368 is input to the demultiplexer 3316.

  Next, specific frequency conversion of each band group will be described. First, in the band group A, the frequency of the first VCO 3317 is supplied to the first analog down converter 3303 and the second analog up converter 3305.

  On the other hand, in the band group B, the signal 3371 obtained by dividing the frequency of the first VCO 3317 by the first divider 3318 by 1.25 is converted into the second analog down converter 3304 and the second analog down converter 3304. Supplied to upconverter 3306 At this time, each frequency is 9 GHz in the first VCO 3317 and 7.2 GHz in the output of the first frequency divider 3318. As shown in FIG. 25, even in this configuration, since the ratio band between the first transceiver and the second transceiver is small, the reception amplifier 3301 and the transmission amplifier 3302 can be shared. The ratio band is smaller than that in the case of FIG. 24, which is 9 / 7.2 = 1.25. Further, since the frequency of the VCO is as low as about half, the design difficulty is eased.

Embodiment 7 of the Invention
Next, a transceiver according to a seventh embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 8 is a block diagram showing a configuration of a transceiver according to the seventh embodiment of the invention.
The transceiver includes a reception circuit 1601 corresponding to the first wireless system, a reception circuit 1602 corresponding to the second wireless system, a transmission circuit 1603 corresponding to the first wireless system, and a second wireless system. Corresponding transmission circuit 1604, first VCO 1613, second VCO 1614, third VCO 1615, first frequency converter 1616, second frequency converter 1617, and third frequency converter 1618. And a fourth frequency converter 1619 and a power control circuit 1620.

  Here, the reception circuit 1601 corresponding to the first radio system receives an analog down converter 1605 to which the first RF reception signal 1651 is input, and an output signal from the analog down converter 1605 as an input, and receives a BB signal. A first digital down converter 1606 for outputting 1655 is provided.

  A reception circuit 1602 corresponding to the second radio system receives an analog down converter 1608 to which the second RF reception signal 1652 is input, an output signal from the analog down converter 1608, and outputs a reception BB signal 1656. A second digital down converter 1607 is provided.

  A transmission circuit 1603 corresponding to the first wireless system inputs a first analog up-converter 1609 that outputs an RF transmission signal 1653 and a transmission BB signal 1657 and outputs an input signal to the analog up-converter 1609. A first digital upconverter 1610 is provided.

  A transmission circuit 1604 corresponding to the second radio system inputs a second analog up-converter 1612 that outputs an RF transmission signal 1654 and a transmission BB signal 1658 and outputs an input signal to the analog up-converter 1612. A second digital upconverter 1611 is provided.

  The first VCO 1613 outputs a signal 1659 having a predetermined oscillation frequency. The second VCO 1614 outputs a signal 1664 having a predetermined oscillation frequency. The third VCO 1615 outputs a signal 1665 having a predetermined oscillation frequency.

  The first frequency converter 1616 converts the frequency of the output signal 1659 of the first VCO 1613 and supplies a local signal 1660 to the first analog down converter 1605 and the first analog up converter 1609. .

  The second frequency converter 1617 converts the frequency of the output signal 1659 of the first VCO 1613 and supplies a local signal 1661 to the second analog down converter 1608 and the second analog up converter 1612. .

  The third frequency converter 1618 converts the frequency of the output signal 1664 of the second VCO 1614 and provides a local signal 1662 to the first digital down converter 1606 and the first digital up converter 1610. .

  The fourth frequency converter 1619 converts the frequency of the output signal 1665 of the third VCO 1615 and supplies a local signal 1663 to the second digital down converter 1607 and the second digital up converter 1611. .

  The power control circuit 1620 generates a power control signal 1666 and performs power control of both transceivers. Details of the power control will be described later.

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, operations and effects of the present invention will be described in detail with reference to the drawings. FIG. 26 is a diagram showing specific power control operation waveforms. When the power control signal 1666 is High, both transceivers operate to enter a broadband transmission mode with high power. On the other hand, when the power control signal 1666 is Low, the first transceiver corresponding to the first wireless system operates, whereas the second transceiver corresponding to the second wireless system is turned off. By stopping, the power saving and narrow band transmission mode is established. Thus, the power can be reduced by controlling the power of the transmitter / receiver according to the necessary band at that time.

Embodiment 8 of the Invention
Next, a transceiver according to an eighth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 9 is a block diagram showing a configuration of a transceiver according to the eighth embodiment of the invention.
The transceiver includes a receiving circuit 1701 corresponding to the first wireless system, a receiving circuit 1702 corresponding to the second wireless system, a transmitting circuit 1704 corresponding to the second wireless system, a first VCO 1713, A second VCO 1714, a first frequency converter 1716, a second frequency converter 1717, a third frequency converter 1718, and a fourth frequency converter 1719 are provided.

  Here, the reception circuit 1701 corresponding to the first radio system receives an analog down converter 1705 to which the first RF reception signal 1751 is input, and an output signal from the analog down converter 1705 as an input, and receives a BB signal. A first digital down converter 1706 that outputs 1755 is provided.

  A reception circuit 1702 corresponding to the second radio system receives an analog down converter 1708 to which the second RF reception signal 1752 is input, and an output signal from the analog down converter 1708, and outputs a reception BB signal 1756. A second digital down converter 1707 is provided.

  A transmission circuit 1704 corresponding to the second radio system inputs a second analog up-converter 1712 that outputs an RF transmission signal 1754 and a transmission BB signal 1758 and outputs an input signal to the analog up-converter 1712. A second digital up-converter 1711 is provided.

  The first VCO 1713 outputs a signal 1759 having a predetermined oscillation frequency. The second VCO 1714 outputs a signal 1764 having a predetermined oscillation frequency. The third VCO 1715 outputs a signal 1765 having a predetermined oscillation frequency.

  The first frequency converter 1716 converts the frequency of the output signal 1759 of the first VCO 1713 and supplies a local signal 1760 to the first analog down converter 1705.

  The second frequency converter 1717 converts the frequency of the output signal 1759 of the first VCO 1713 and supplies a local signal 1761 to the second analog down converter 1708 and the second analog up converter 1712. .

  The third frequency converter 1718 converts the frequency of the output signal 1764 of the second VCO 1714 and supplies a local signal 1762 to the first digital down converter 1706.

  The fourth frequency converter 1719 converts the frequency of the output signal 1765 of the third VCO 1715 and supplies a local signal 1863 to the second digital down converter 1707 and the second digital up converter 1711. .

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, operations and effects of the present invention will be described in detail with reference to the drawings. As shown in FIG. 8, the receiving side receives two standards or bands (band groups), whereas the transmitting side transmits only one standard or band (band group). With this configuration, local signal distribution can be simplified as compared with the transceiver according to the first embodiment of the invention. In addition, this structure can also be made into the structure which replaced the standard of a receiving side and a transmission side, or the number of bands (band group).

Embodiment 9 of the Invention
Next, a transceiver according to a ninth embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 10 is a block diagram showing a configuration of a transceiver according to the ninth embodiment of the invention.
The transceiver includes a receiving circuit 1901 corresponding to the first wireless system, a transmitting circuit 1904 corresponding to the second wireless system, a first VCO 1913, a second VCO 1914, and a first frequency converter 1916. A second frequency converter 1917, a third frequency converter 1918, and a fourth frequency converter 1919.

  Here, the reception circuit 1901 corresponding to the first radio system receives an analog down converter 1905 to which the first RF reception signal 1951 is input and an output signal from the analog down converter 1905 as an input, and receives a BB signal. A first digital down converter 1906 that outputs 1955 is provided.

  A transmission circuit 1904 corresponding to the second radio system inputs a second analog up-converter 1912 that outputs an RF transmission signal 1954 and a transmission BB signal 1958 and outputs an input signal to the analog up-converter 1912. A second digital up-converter 1911 is provided.

  The first VCO 1913 outputs a signal 1959 having a predetermined oscillation frequency. The second VCO 1914 outputs a signal 1964 having a predetermined oscillation frequency. The third VCO 1915 outputs a signal 1965 having a predetermined oscillation frequency.

  The first frequency converter 1916 converts the frequency of the output signal 1959 of the first VCO 1913 and supplies a local signal 1960 to the first analog down converter 1905.

  The second frequency converter 1917 converts the frequency of the output signal 1959 of the first VCO 1913 and supplies a local signal 1961 to the second analog upconverter 1912.

  The third frequency converter 1918 converts the frequency of the output signal 1964 of the second VCO 1914 and supplies a local signal 1962 to the first digital down converter 1906.

  The fourth frequency converter 1919 converts the frequency of the output signal 1965 of the third VCO 1915 and supplies a local signal 1963 to the second digital upconverter 1911.

  Here, the analog up converter and the analog down converter perform frequency conversion of the analog signal, and the digital up converter and the digital down converter perform frequency conversion of the digital signal, respectively. Further, an AD converter or a DA converter is used for conversion between an analog signal and a digital signal.

  Next, operations and effects of the present invention will be described in detail with reference to the drawings. As shown in FIG. 9, the receiving side receives only one standard or band (band group), whereas the transmitting side also transmits only one standard or band (band group). However, both standards are different. With this configuration, local signal distribution can be further simplified as compared with the transceiver according to the eighth embodiment of the present invention. In addition, this structure can also be made into the structure which replaced the specification of a receiving side and a transmission side, or a band (band group).

  Although the present invention has been described with reference to the exemplary embodiments, the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.

  This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2008-224516 for which it applied on September 2, 2008, and takes in those the indications of all here.

  The present invention can be used for a transceiver capable of transmitting and receiving signals of a plurality of wireless standards or a plurality of bands (band groups).

DESCRIPTION OF SYMBOLS 1a 1st communication circuit, 1b 2nd communication circuit, 2 Oscillator, 3a 1st frequency converter, 3b 2nd frequency converter, 1101 Reception circuit corresponding to 1st radio | wireless system, 1102 2nd radio | wireless Receiving circuit corresponding to system band, 1103 transmitting circuit corresponding to first wireless system, 1104 transmitting circuit corresponding to second wireless system, 1105 first analog down converter, 1106 first digital down converter 1107 second digital down converter, 1108 second analog down converter, 1109 first analog up converter, 1110 first digital up converter, 1111 second digital up converter, 1112 second Analog up-converter, 1113 first VCO, 111 Second VCO, 1115 third VCO, 1116 first frequency converter, 1117 second frequency converter, 1118 third frequency converter, 1119 fourth frequency converter, 1151 of the first radio system Received RF signal, 1152 Received RF signal of the second wireless system, 1153 Transmitted RF signal of the first wireless system, 1154 Transmitted RF signal of the second wireless system, 1155 Received BB signal of the first wireless system, 1156th Received BB signal of 2 wireless systems, 1157 Transmitted BB signal of first wireless system, 1158 Transmitted BB signal of 2nd wireless system, 1159 Output signal of first VCO, 1160 First analog up / down converter Local signal, 1161 second analog up / down converter local signal, 1162 first Digital up / down converter local signal, 1163 second digital up / down converter local signal, 1164 second VCO output signal, 1165 third VCO output signal, 1201 to the first wireless system Corresponding receiving circuit, 1202 receiving circuit corresponding to the second wireless system, 1203 transmitting circuit corresponding to the first wireless system, 1204 transmitting circuit corresponding to the second wireless system, 1205 first analog down converter, 1206 first digital down converter, 1207 second digital down converter, 1208 second analog down converter, 1209 first analog up converter, 1210 first digital up converter, 1211 is second Digital upconverter, 212 second analog upconverter, 1213 first VCO, 1214 second VCO, 1216 first frequency converter, 1217 second frequency converter, 1218 third frequency converter, 1219 fourth frequency Converter, 1251 first radio system receive RF signal, 1252 second radio system receive RF signal, 1253 first radio system transmit RF signal, 1254 second radio system transmit RF signal, 1255 first Received BB signal of the first wireless system, 1256 received BB signal of the second wireless system, 1257 transmitted BB signal of the first wireless system, 1258 transmitted BB signal of the second wireless system, 1259 output signal of the first VCO, 1260 1st local signal for analog up / down converter, 1261 2nd analog signal Local signal for up / down converter, 1262 local signal for first digital up / down converter, 1263 local signal for second digital up / down converter, 1264 second VCO output signal, 1801 first radio Receiving circuit corresponding to the system, 1802 receiving circuit corresponding to the second wireless system, 1803 transmitting circuit corresponding to the first wireless system, 1804 transmitting circuit corresponding to the second wireless system, 1805 first analog down Converter, 1806 first digital down converter, 1807 second digital down converter, 1808 second analog down converter, 1809 first analog up converter, 1810 first digital up converter, 1811 second Digital app Pre-converter, 1812 second analog upconverter, 1813 first VCO, 1814 second VCO, 1816 first frequency converter, 1817 second frequency converter, 1818 third frequency converter, 1819 first 4 frequency converters, 1851 received RF signal of the first wireless system, 1852 received RF signal of the second wireless system, 1853 transmitted RF signal of the first wireless system, 1854 transmitted RF signal of the second wireless system, 1855 BB signal of the first radio system, 1856 BB signal of the second radio system, 1857 BB signal of the first radio system, 1858 BB signal of the second radio system, 1859 of the first VCO Output signal, 1860 local signal for first analog up / down converter, 1861 second Analog up / down converter local signal, 1862 first digital up / down converter local signal, 1863 second digital up / down converter local signal, 1864 second VCO output signal, 1301 first Receiving circuit corresponding to the first wireless system, receiving circuit corresponding to the second wireless system, 1303 transmitting circuit corresponding to the first wireless system, 1304 transmitting circuit corresponding to the second wireless system, 1305 first Analog down converter, 1306 first digital down converter, 1307 second digital down converter, 1308 second analog down converter, 1309 first analog up converter, 1310 first digital up converter, 1311 2nd Digital upconverter, 1312 second analog upconverter, 1313 first VCO, 1316 first frequency converter, 1317 second frequency converter, 1318 third frequency converter, 1319 fourth frequency conversion 1351, RF signal received by the first radio system, 1352 RF signal received by the second radio system, 1353 RF signal sent by the first radio system, 1354 RF signal sent by the second radio system, 1355 first Received BB signal of the wireless system, 1356 Received BB signal of the second wireless system, 1357 Transmitted BB signal of the first wireless system, 1358 Transmitted BB signal of the second wireless system, 1359 Output signal of the first VCO, 1360 1st local signal for analog up / down converter, 1361 2nd analog Up / down converter local signal, 1362 first digital up / down converter local signal, 1363 second digital up / down converter local signal, 1401 receiving circuit corresponding to the first radio system, 1402 Receiver circuit corresponding to the second wireless system, 1403 Transmitter circuit corresponding to the first wireless system, 1404 Transmitter circuit corresponding to the second wireless system, 1405 First analog down converter, 1406 First digital Downconverter, 1407 Second digital downconverter, 1408 Second analog downconverter, 1409 First analog upconverter, 1410 First digital upconverter, 1411 Second digital upconverter, 1412 First Analog up-converter, 1413 first VCO, 1414 second VCO, 1416 first frequency converter, 1417 second frequency converter, 1418 third frequency converter, 1451 reception of first radio system RF signal, 1452 Received RF signal of second wireless system, 1453 Transmitted RF signal of first wireless system, 1454 Transmitted RF signal of second wireless system, 1455 Received BB signal of first wireless system, 1456 Second 1BB first radio system transmit BB signal, 1458 second radio system transmit BB signal, 1459 first VCO output signal, 1460 for first analog up / down converter Local signal, 1461 Local signal for second analog up / down converter, 14 62 local signal for first digital up / down converter, 1464 output signal of second VCO, 1501 receiving circuit corresponding to first wireless system, 1502 receiving circuit corresponding to second wireless system, 1503 first 1504 Transmitting circuit corresponding to the second wireless system, 1504 Transmitting circuit corresponding to the second wireless system, 1505 First analog down converter, 1506 First digital down converter, 1507 Second digital down converter, 1508 First 2 analog down converters, 1509 first analog up converter, 1510 first digital up converter, 1511 second digital up converter, 1512 second analog up converter, 1513 first VCO, 1516 First frequency change 1517 second frequency converter, 1551 received radio signal of the first radio system, 1552 received RF signal of the second radio system, 1553 transmitted RF signal of the first radio system, 1554 of the second radio system RF transmission signal, 1555 reception BB signal of the first wireless system, 1556 reception BB signal of the second wireless system, 1557 transmission BB signal of the first wireless system, 1558 transmission BB signal of the second wireless system, 1559 first 1 VCO output signal, 1560 first analog up / down converter local signal, 1561 second analog up / down converter local signal, 1601 receiving circuit corresponding to the first wireless system, 1602 second Receiving circuit corresponding to the first wireless system, 1603 transmitting circuit corresponding to the first wireless system Circuit, 1604 transmitting circuit corresponding to the second wireless system, 1605 first analog down converter, 1606 first digital down converter, 1607 second digital down converter, 1608 second analog down converter, 1609 first analog upconverter, 1610 first digital upconverter, 1611 second digital upconverter, 1612 second analog upconverter, 1613 first VCO, 1614 second VCO, 1615 second 3 VCO, 1616 1st frequency converter, 1617 2nd frequency converter, 1618 3rd frequency converter, 1619 4th frequency converter, 1620 power control circuit, 1651 received RF of 1st wireless system Signal, 1652 second wireless sys Received RF signal, 1653 transmitted RF signal of the first wireless system, 1654 transmitted RF signal of the second wireless system, 1655 received BB signal of the first wireless system, 1656 received BB signal of the second wireless system, 1657 first radio system transmit BB signal, 1658 second radio system transmit BB signal, 1659 first VCO output signal, 1660 first analog up / down converter local signal, 1661 second analog Local signal for up / down converter, 1662 Local signal for first digital up / down converter, 1663 Local signal for second digital up / down converter, 1664 Output signal of second VCO, 1665 Third VCO Output signal, 1666 power control signal, 1701 first radio Receiving circuit corresponding to the system, 1702 receiving circuit corresponding to the second wireless system, 1704 transmitting circuit corresponding to the second wireless system, 1705 first analog down converter, 1706 first digital down converter, 1707 Second digital down converter, 1708 second analog down converter, 1711 second digital up converter, 1712 second analog up converter, 1713 first VCO, 1714 second VCO, 1715 third VCO, 1716 first frequency converter, 1717 second frequency converter, 1718 third frequency converter, 1719 fourth frequency converter, 1751 first radio system received RF signal, 1752 second Received RF signal of the wireless system, 1754 Second wireless system RF transmission signal, 1755 received BB signal of the first wireless system, 1756 received BB signal of the second wireless system, 1758 transmitted BB signal of the second wireless system, 1759 output signal of the first VCO, 1760 first 1 local signal for analog up / down converter, 1761 second local signal for analog up / down converter, 1762 local signal for first digital up / down converter, 1762 second digital up / down converter Local signal, 1764 second VCO output signal, 1765 third VCO output signal, 1901 reception circuit corresponding to the first wireless system, 1904 transmission circuit corresponding to the second wireless system, 1905 first Analog downconverter, 1906 first digital down Converter, 1911 second digital upconverter, 1912 second analog upconverter, 1913 first VCO, 1914 second VCO, 1915 third VCO, 1916 first frequency converter, 1917 second Frequency converter, 1918 third frequency converter, 1919 fourth frequency converter, 1951 received radio signal of first radio system, 1954 transmitted RF signal of second radio system, 1955 received of first radio system BB signal, 1958 second wireless system transmission BB signal, 1959 first VCO output signal, 1960 first analog up / down converter local signal, 1961 second analog up / down converter local signal 1962 First digital up / down converter localizer Signal, 1963 second digital up / down converter local signal, 1964 second VCO output signal, 1965 third VCO output signal, 3101 reception amplifier, 3102 transmission amplifier, 3103 first analog down converter 3104 second analog down converter, 3105 first analog up converter, 3106 second analog up converter, 3107 first analog BB circuit, 3108 second analog BB circuit, 3109 third analog BB Circuit, 3110 fourth analog BB circuit, 3111 first digital BB circuit, 3112 second digital BB circuit, 3113 third digital BB circuit, 3114 fourth digital BB circuit, 3115 multiplexer, 3116 demultiplexer, 311 First VCO, 3118 first divider, 3119 second divider, 3120 adder circuit, 3121 second VCO, 3122 third divider, 3151 received RF signal, 3152 transmitted RF signal, 3153 Output signal of reception amplifier, output signal of 3155 first analog down converter, output signal of 3156 second analog down converter, output signal of 3157 third analog BB circuit, output of 3158 fourth analog BB circuit 3159, first analog BB circuit output signal, 3160 second analog BB circuit output signal, 3161 third digital BB circuit output signal, 3162 fourth digital BB circuit output signal, 3163 first signal Output signal of digital BB circuit, 3164 Output signal of second digital BB circuit, 3165 Third digit Tal BB circuit input signal, 3166 fourth digital BB circuit input signal, 3167 multiplexer output signal, 3168 demultiplexer input signal, 3169 first VCO output signal, 3170 first analog up / down converter Local signal, 3171 second analog up / down converter local signal, 3172 first digital up / down converter local signal, 3201 reception amplifier, 3202 transmission amplifier, 3203 first analog down converter, 3204 Second analog down converter, 3205 first analog up converter, 3206 second analog up converter, 3207 first analog BB circuit, 3208 second analog BB circuit, 3209 third analog BB times Path, 3210 fourth analog BB circuit, 3211 first digital BB circuit, 3212 second digital BB circuit, 3213 third digital BB circuit, 3214 fourth digital BB circuit, 3215 multiplexer, 3216 demultiplexer, 3217 1st VCO, 3218 1st frequency divider, 3219 2nd frequency divider, 3220 adder circuit, 3251 reception RF signal, 3252 transmission RF signal, 3253 output signal of reception amplifier, 3255 1st analog down converter , 3256 output signal of the second analog down converter, 3257 output signal of the third analog BB circuit, 3258 output signal of the fourth analog BB circuit, 3259 output signal of the first analog BB circuit, 3260 The output signal of the second analog BB circuit, 3261 3 digital BB circuit output signal, 3262 fourth digital BB circuit output signal, 3263 first digital BB circuit output signal, 3264 second digital BB circuit output signal, 3265 third digital BB circuit output signal Input signal, input signal of 3266 fourth digital BB circuit, output signal of 3267 multiplexer, input signal of 3268 demultiplexer, output signal of 3269 first VCO, local signal for 3270 first analog up / down converter, 3271 Local signal for second analog up / down converter, 3301 reception amplifier, 3302 transmission amplifier, 3303 first analog down converter, 3304 second analog down converter, 3305 first analog up converter, 3306 Second Ana Up-converter, 3307 first analog BB circuit, 3308 second analog BB circuit, 3309 third analog BB circuit, 3310 fourth analog BB circuit, 3311 first digital BB circuit, 3312 second digital BB circuit, 3313 third digital BB circuit, 3314 fourth digital BB circuit, 3315 multiplexer, 3316 demultiplexer, 3317 first VCO, 3318 first divider, 3320 adder circuit, 3351 received RF signal, 3352 RF transmission signal, 3353 output signal of reception amplifier, 3355 output signal of first analog down converter, 3356 output signal of second analog down converter, 3357 output signal of third analog BB circuit, 3358 fourth Output signal of analog BB circuit, 359 first analog BB circuit output signal, 3360 second analog BB circuit output signal, 3361 third digital BB circuit output signal, 3362 fourth digital BB circuit output signal, 3363 first digital BB Circuit output signal, 3364 second digital BB circuit output signal, 3365 third digital BB circuit input signal, 3366 fourth digital BB circuit input signal, 3367 multiplexer output signal, 3368 demultiplexer input signal 3369 first VCO output signal, 3370 first analog up / down converter local signal, 3371 second analog up / down converter local signal, 5101 receiving circuit corresponding to first radio system, 5102 Receiving circuit corresponding to the second wireless system, 5 103 Transmission circuit corresponding to the first wireless system, 5104 Transmission circuit corresponding to the second wireless system, 5105 First analog down converter, 5106 First digital down converter, 5107 Second digital down converter 5108 Second analog down converter, 5109 First analog up converter, 5110 First digital up converter, 5111 Second digital up converter, 5112 Second analog up converter, 5113 VCO, 5116 Frequency conversion circuit, 5151 received RF signal of the first wireless system, 5152 received RF signal of the second wireless system, 5153 transmitted RF signal of the first wireless system, 5154 transmitted RF signal of the second wireless system, 5155 first 1 wireless system System BB signal, 5156 second radio system reception BB signal, 5157 first radio system transmission BB signal, 5158 second radio system transmission BB signal, 5159 VCO output signal, 5160 frequency conversion circuit Output signal

Claims (12)

A transceiver,
A first communication circuit corresponding to the first wireless system;
A second communication circuit corresponding to the second wireless system;
An oscillator that generates a common frequency signal common to both the first communication circuit and the second communication circuit;
A frequency converter that converts the frequency of the common frequency signal generated by the oscillator and supplies a local signal to the first communication circuit or the second communication circuit;
The first communication circuit includes a first analog converter that performs frequency conversion on an input analog signal;
The second communication circuit includes a second analog converter that performs frequency conversion on an input analog signal;
The frequency converter is
A first frequency converter that converts the frequency of the common frequency signal generated by the oscillator and supplies the signal to the first analog converter;
A second frequency converter that converts the frequency of the common frequency signal generated by the oscillator at a conversion ratio different from that of the first frequency converter and supplies the converted signal to the second analog converter;
The first communication circuit further includes a first digital converter that performs frequency conversion on an input digital signal;
The second communication circuit further includes a second digital converter that performs frequency conversion on the input digital signal,
The oscillator is
A first oscillator for supplying the common frequency signal to the first frequency converter and the second frequency converter;
A transceiver having a second oscillator that generates a frequency signal for a local signal supplied to one of the first digital converter and the second digital converter.   The transceiver according to claim 1, wherein the second oscillator is a non-inductor-type VCO.   The transceiver according to claim 1 or 2, wherein the second oscillator generates a frequency signal having an oscillation frequency lower than that of the first oscillator.   2. The transmission / reception according to claim 1, wherein the second oscillator generates a frequency signal for a local signal supplied to each of the first digital converter and the second digital converter. vessel.   The oscillator is a digital converter different from the digital converter of the first digital converter and the second digital converter to which a local signal corresponding to the frequency signal generated by the second oscillator is supplied. The transceiver according to claim 1, further comprising a third oscillator that generates a frequency signal for a supplied local signal.   5. The transceiver according to claim 4, wherein the second oscillator is a non-inductor-type VCO.   The transceiver according to claim 5, wherein the third oscillator generates a frequency signal having an oscillation frequency lower than that of the first oscillator.   Of the first digital converter and the second digital converter, a local signal supplied to a digital converter different from a digital converter to which a local signal corresponding to a frequency signal generated by a second oscillator is supplied, The third frequency converter generated by frequency-converting a common frequency signal generated from the first oscillator or a signal obtained by frequency-converting the common frequency signal. Transceiver. A transceiver,
A first communication circuit corresponding to the first wireless system;
A second communication circuit corresponding to the second wireless system;
An oscillator that generates a common frequency signal common to both the first communication circuit and the second communication circuit;
A frequency converter that converts the frequency of the common frequency signal generated by the oscillator and supplies a local signal to the first communication circuit or the second communication circuit;
The first communication circuit includes a first analog converter that performs frequency conversion on an input analog signal;
The second communication circuit includes a second analog converter that performs frequency conversion on an input analog signal;
The frequency converter is
A first frequency converter that converts the frequency of the common frequency signal generated by the oscillator and supplies the signal to the first analog converter;
A second frequency converter that converts the frequency of the common frequency signal generated by the oscillator at a conversion ratio different from that of the first frequency converter and supplies the converted signal to the second analog converter;
The first communication circuit further includes a first digital converter that performs frequency conversion on an input digital signal;
The second communication circuit further includes a second digital converter that performs frequency conversion on the input digital signal,
The transceiver further converts a frequency of the output signal of the first frequency converter, and supplies the frequency signal to the first digital converter;
A transceiver comprising a fourth frequency converter that frequency-converts an output signal of the second frequency converter and supplies the converted signal to the second digital converter. A transceiver,
A first communication circuit corresponding to the first wireless system;
A second communication circuit corresponding to the second wireless system;
An oscillator that generates a common frequency signal common to both the first communication circuit and the second communication circuit;
A frequency converter that converts the frequency of the common frequency signal generated by the oscillator and supplies a local signal to the first communication circuit or the second communication circuit;
And a power control circuit for switching on and off the supply of power to the first communication circuit and the second communication circuit,
The power control circuit supplies power to one of the first communication circuit and the second communication circuit, and a broadband mode for supplying power to both the first communication circuit and the second communication circuit. Transmitter / receiver that selects and controls the narrowband power saving mode.   The transceiver corresponds to UWB (Ultra Wide Band), the first wireless system corresponds to one band group included in the band group of the UWB, and the second wireless system corresponds to the UWB. The transceiver according to any one of claims 1 to 10, wherein the transceiver corresponds to another band group included in the band group. Generating a common frequency signal common to both the first communication circuit corresponding to the first wireless system and the second communication circuit corresponding to the second wireless system by an oscillator;
The common frequency signal generated by the oscillator is frequency-converted by a frequency converter, and a local signal is supplied to the first communication circuit or the second communication circuit.
The local signal supplying step includes:
Frequency-converting the common frequency signal and supplying the common frequency signal as a first local signal to the analog converter of the first communication circuit;
A step of frequency-converting the common frequency signal at a conversion ratio different from that when the first local signal is generated, and supplying the common frequency signal as a second local signal to the analog converter of the second communication circuit. ,
The step of generating the common frequency signal includes:
Supplying the common frequency signal to a first frequency converter supplying the first local signal and a second frequency converter supplying the second local signal;
Generating a frequency signal for a local signal supplied to one of the digital converter of the first communication circuit and the digital converter of the second communication circuit.

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