JP2005287001A - Multi-mode radio transmitter and mobile radio apparatus using it - Google Patents

Multi-mode radio transmitter and mobile radio apparatus using it Download PDF

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JP2005287001A
JP2005287001A JP2005030439A JP2005030439A JP2005287001A JP 2005287001 A JP2005287001 A JP 2005287001A JP 2005030439 A JP2005030439 A JP 2005030439A JP 2005030439 A JP2005030439 A JP 2005030439A JP 2005287001 A JP2005287001 A JP 2005287001A
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frequency
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frequency divider
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JP3970284B2 (en
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Atsushi Yoshimoto
篤史 吉本
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a difficulty to load a multi-mode radio transmitter with a complicated and large circuit into a mobile radio apparatus. <P>SOLUTION: Frequency dividers for the circuit of a first frequency mode and for the circuit of a second frequency mode are commonly used in the circuit of the multi-mode radio transmitter. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、携帯無線通信機器の高周波集積回路に係り、特に、小型化・軽量化・低消費電力化を図ったマルチモード無線送信機及びこれを用いた携帯無線機に関するものである。   The present invention relates to a high-frequency integrated circuit of a portable wireless communication device, and more particularly to a multimode wireless transmitter that is reduced in size, weight, and power consumption, and a portable wireless device using the same.

近年、移動体通信機器においては、様々なシステムが複合してきており、周波数帯も複数にまたがるマルチバンドシステムが増えてきている。従来、このようなシステムに対応した無線機は非常に複雑な構成になり回路規模も増大して、発振器数も多くスプリアスの要因にもなっている。
特開２０００−１３２７４号公報 In recent years, various systems have been combined in mobile communication devices, and multiband systems having a plurality of frequency bands are increasing. Conventionally, a radio device compatible with such a system has a very complicated configuration, an increase in circuit scale, a large number of oscillators, and spurious factors.
JP 2000-13274 A

しかしながら、このような従来の周波数帯を使用するデュアルモード携帯通信端末では、無線部の共有部分が少なく、送信系では完全２系統となり、小型化・軽量化・低消費電力化が極めて困難であった。   However, in the dual mode portable communication terminal using such a conventional frequency band, the shared part of the radio part is small and the transmission system is completely two systems, and it is extremely difficult to reduce the size, weight and power consumption. It was.

本発明は、前記従来技術の課題を解決することに指向するものであり、２周波数帯を使用するデュアルモード携帯通信端末送信系の直交変調器、増幅器を共有し、増幅器出力にスイッチを設けて、異なるモードの送信系回路に信号を供給し、また発振器と２つの分周器の動作状態をスイッチによりモードを切り換え制御できるように設定して、小型化・軽量化・低消費電力化を図ったマルチモード無線送信機及びこれを用いた携帯無線機を提供することを目的とする。   The present invention is directed to solving the above-described problems of the prior art. The dual-mode portable communication terminal transmission system quadrature modulator and amplifier using two frequency bands are shared, and a switch is provided at the amplifier output. In order to reduce the size, weight, and power consumption, the signal is supplied to the transmission system circuit in different modes, and the operating state of the oscillator and the two frequency dividers can be controlled by the switch. Another object of the present invention is to provide a multimode wireless transmitter and a portable wireless device using the same.

この目的を達成するために、本発明に係るマルチモード無線送信機は、所定の周波数で発振する第１の発振器と、
前記第１の発振器で生成した信号の周波数を２分の１に分周すると共に、互いに位相が９０度異なる第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａを出力する第１の分周器と、
前記第１の発振器と異なる所定の周波数で発振する第２の発振器と、
前記第２の発振器で生成した信号の周波数を２分の１に分周する第２の分周器と、
前記第２の分周器の出力信号の周波数を更に２分の１に分周すると共に、互いに位相が９０度異なる第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂを出力する第３の分周器と、
第１の搬送波ｆｏＩａと、第３の搬送波ｆｏＩｂを受け、制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第１の切換増幅器と、
第２の搬送波ｆｏＱａと、第４の搬送波ｆｏＱｂを受け、上記制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第２の切換増幅器と、
ベースバンド信号を、前記第１及び第２の切換増幅器のそれぞれの出力信号により直交変調する直交変調器と
を備えたことを特徴とする。 To achieve this object, a multimode wireless transmitter according to the present invention includes a first oscillator that oscillates at a predetermined frequency,
A first frequency divider that divides the frequency of the signal generated by the first oscillator by a half and outputs a first carrier wave foIa having a phase difference of 90 degrees and a second carrier wave foQa; ,
A second oscillator that oscillates at a predetermined frequency different from that of the first oscillator;
A second frequency divider that divides the frequency of the signal generated by the second oscillator by half;
The frequency of the output signal of the second frequency divider is further divided by half, and the third frequency dividing unit outputs a third carrier foIb and a fourth carrier foQb whose phases are different from each other by 90 degrees. And
A first switching amplifier that receives the first carrier foIa and the third carrier foIb, selects one of the carriers by a control signal, amplifies and outputs the selected carrier;
A second switching amplifier that receives the second carrier foQa and the fourth carrier foQb, selects one of the carriers by the control signal, amplifies and outputs the selected carrier;
And a quadrature modulator that quadrature-modulates a baseband signal with respective output signals of the first and second switching amplifiers.

また、本発明にかかるマルチモード無線送信機は、
更に、前記第１の分周器の出力信号の周波数を更に２分の１に分周する第４の分周器と、
前記第３の分周器からの出力信号と、前記第４の分周器からの出力信号を受け、上記制御信号によりいずれか一方の出力信号を選択し、選択した出力信号を増幅し出力する第３の切換増幅器と、
前記選択した出力信号を、所定の基準信号と比較し、位相ズレに対応した信号を出力する周波数シンセサイザと、
前記周波数シンセサイザの出力信号を受けるループフィルタとを備え、
ループフィルタの出力を用いて前記第１の発振器または前記第２の発振器の発振周波数を安定させることを特徴とする。 Moreover, the multi-mode wireless transmitter according to the present invention is:
A fourth frequency divider that further divides the frequency of the output signal of the first frequency divider by half;
The output signal from the third frequency divider and the output signal from the fourth frequency divider are received, one of the output signals is selected by the control signal, and the selected output signal is amplified and output. A third switching amplifier;
A frequency synthesizer that compares the selected output signal with a predetermined reference signal and outputs a signal corresponding to a phase shift;
A loop filter that receives an output signal of the frequency synthesizer,
The output frequency of the loop filter is used to stabilize the oscillation frequency of the first oscillator or the second oscillator.

また、本発明にかかるマルチモード無線送信機は、
前記第１の分周器と第２の分周器を一つの分周器で構成したことを特徴とする。
また、本発明にかかるマルチモード無線送信機は、
前記第３の分周器と第４の分周器を一つの分周器で構成したことを特徴とする。
また、本発明にかかるマルチモード無線送信機は、
前記第１の発振器と第２の発振器を一つの発振器で構成したことを特徴とする。
更に、本発明にかかる携帯無線機は、
所定の周波数で発振する第１の発振器と、
前記第１の発振器で生成した信号の周波数を２分の１に分周すると共に、互いに位相が９０度異なる第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａを出力する第１の分周器と、
前記第１の発振器と異なる所定の周波数で発振する第２の発振器と、
前記第２の発振器で生成した信号の周波数を２分の１に分周する第２の分周器と、
前記第２の分周器の出力信号の周波数を更に２分の１に分周すると共に、互いに位相が９０度異なる第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂを出力する第３の分周器と、
第１の搬送波ｆｏＩａと、第３の搬送波ｆｏＩｂを受け、制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第１の切換増幅器と、
第２の搬送波ｆｏＱａと、第４の搬送波ｆｏＱｂを受け、上記制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第２の切換増幅器と、
ベースバンド信号を、前記第１及び第２の切換増幅器のそれぞれの出力信号により直交変調する直交変調器と、
第１の処理回路と、
第２の処理回路とを備え、
前記第１の処理回路は、第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａが選択されたときに動作可能となる
前記直交変調器からの出力を増幅する第１増幅手段と、
前記第１増幅手段に接続した第１アンテナ共用手段と
を有し、
前記第２の処理回路は、第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂが選択されたときに動作可能となる
前記直交変調器からの出力を増幅する第２増幅手段と、
前記第１増幅手段に接続した第２アンテナ共用手段と
を有し、更に、
前記第１アンテナ共用手段と、第２アンテナ共用手段とに切替可能なスイッチと、
前記スイッチに接続されたアンテナと
を備えたことを特徴とする。 Moreover, the multi-mode wireless transmitter according to the present invention is:
The first frequency divider and the second frequency divider are constituted by a single frequency divider.
Moreover, the multi-mode wireless transmitter according to the present invention is:
The third frequency divider and the fourth frequency divider are constituted by a single frequency divider.
Moreover, the multi-mode wireless transmitter according to the present invention is:
The first oscillator and the second oscillator are constituted by one oscillator.
Furthermore, the portable wireless device according to the present invention is:
A first oscillator that oscillates at a predetermined frequency;
A first frequency divider that divides the frequency of the signal generated by the first oscillator by a half and outputs a first carrier wave foIa having a phase difference of 90 degrees and a second carrier wave foQa; ,
A second oscillator that oscillates at a predetermined frequency different from that of the first oscillator;
A second frequency divider that divides the frequency of the signal generated by the second oscillator by half;
The frequency of the output signal of the second frequency divider is further divided by half, and the third frequency dividing unit outputs a third carrier foIb and a fourth carrier foQb whose phases are different from each other by 90 degrees. And
A first switching amplifier that receives the first carrier foIa and the third carrier foIb, selects one of the carriers by a control signal, amplifies and outputs the selected carrier;
A second switching amplifier that receives the second carrier foQa and the fourth carrier foQb, selects one of the carriers by the control signal, amplifies and outputs the selected carrier;
A quadrature modulator that quadrature modulates a baseband signal with respective output signals of the first and second switching amplifiers;
A first processing circuit;
A second processing circuit,
The first processing circuit is operable when a first carrier wave foIa and a second carrier wave foQa are selected; first amplification means for amplifying an output from the quadrature modulator;
First antenna sharing means connected to the first amplification means,
The second processing circuit is operable when a third carrier foIb and a fourth carrier foQb are selected, and second amplification means for amplifying the output from the quadrature modulator;
Second antenna sharing means connected to the first amplification means, and
A switch switchable between the first antenna sharing means and the second antenna sharing means;
And an antenna connected to the switch.

前記構成によれば、デュアルモード無線送信機において、中間周波数を使用しないことから発振器の個数を削減し、直交変調器，増幅器を共有化でき、かつベースバンド信号処理部からのベースバンド信号の入力端子を少なくでき、これを用いる携帯無線機においても、小型化できる。   According to the above configuration, in the dual mode radio transmitter, the number of oscillators can be reduced because no intermediate frequency is used, the quadrature modulator and the amplifier can be shared, and the baseband signal input from the baseband signal processing unit The number of terminals can be reduced, and a portable wireless device using the terminals can be downsized.

また、本発明によれば、中間周波数を使用しないことで発振器の個数を削減でき、かつ変調器も共通化することにより小型化が可能となり、直交変調器の共通化によってベースバンド信号処理部からのベースバンド信号入力端子を少なくでき、キャリアリークの調整も容易にできるという効果を奏する。   In addition, according to the present invention, the number of oscillators can be reduced by not using an intermediate frequency, and the size can be reduced by using a common modulator. The baseband signal input terminals can be reduced and the carrier leak can be easily adjusted.

以下、図面を参照して本発明における実施の形態を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は本発明の実施の形態１におけるマルチモード無線送信機の概略構成を示すブロック図である。図１において、１００，１０１は第１，第２の発振器、１０２，１０３，１０４，１０５は第１，第２，第３，第４の分周器、１０６，１０７，１０８は２入力から一方の出力を選択し出力する切換機能を有する第１，第２，第３の切換増幅器、１０９は直交変調器、１１０，１１１，１１２，１１３，１１４，１１５は第１，第２，第３，第４，第５，第６の増幅器、１１６，１１７は第１，第２のバンドパスフィルタ、１１８は周波数シンセサイザ（可変分周器）、１１９はループフィルタ、１２０，１２１は第１，第２の共用器、１２２はモードスイッチ、１２３は外部アンテナである。   FIG. 1 is a block diagram showing a schematic configuration of a multimode radio transmitter according to Embodiment 1 of the present invention. In FIG. 1, reference numerals 100 and 101 denote first and second oscillators, reference numerals 102, 103, 104, and 105 denote first, second, third, and fourth frequency dividers. 1, 2 nd and 3 rd switching amplifiers having a switching function for selecting and outputting the output, 109 is a quadrature modulator, 110, 111, 112, 113, 114 and 115 are 1, 2, 3, 3, Fourth and fifth amplifiers 116 and 117 are first and second bandpass filters, 118 is a frequency synthesizer (variable frequency divider), 119 is a loop filter, and 120 and 121 are first and second filters. , 122 is a mode switch, and 123 is an external antenna.

以上のように構成されたマルチモード無線送信機の動作を以下に説明する。まず、第１の周波数（２ＧＨｚ）モードの場合、第１の発振器１００から周波数Ｆ１、たとえば４ＧＨｚの信号を生成し、第１の分周器１０２により（１／Ｎ１）、たとえば１／２に分周した２ＧＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩａ，ｆｏＱａを出力する。第１の切換増幅器１０６で搬送波ｆｏＩａを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱａを増幅する。切替増幅器１０６，１０７のそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力して変調信号を得る。以上のように、第１の周波数モードのときは、第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａが選択され、処理される。   The operation of the multimode wireless transmitter configured as described above will be described below. First, in the case of the first frequency (2 GHz) mode, a signal having a frequency F1, for example, 4 GHz, is generated from the first oscillator 100, and is divided by the first frequency divider 102 to (1 / N1), for example, 1/2. Two carrier waves foIa and foQa having a phase difference of 90 degrees with respect to each other at 2 GHz around the circumference are output. The first switching amplifier 106 amplifies the carrier wave foIa, and the second switching amplifier 107 amplifies the other carrier foQa whose phase is shifted by 90 degrees. The output signals of the switching amplifiers 106 and 107 and the baseband signal from the baseband signal processing unit are input to the quadrature modulator 109 to obtain a modulation signal. As described above, in the first frequency mode, the first carrier foIa and the second carrier foQa are selected and processed.

この出力を第１，第２の増幅器１１０，１１１で増幅して、第１のバンドパスフィルタ１１６で必要な帯域以外の周波数を除去し、さらに第３の増幅器１１２により送信信号を増幅し、第１の共用器１２０，モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。第１，第２の増幅器１１０，１１１、第１のバンドパスフィルタ１１６、第３の増幅器１１２は、第１周波数モードのときに動作可能となる第１処理回路を構成する。   The output is amplified by the first and second amplifiers 110 and 111, the frequency other than the necessary band is removed by the first band-pass filter 116, the transmission signal is further amplified by the third amplifier 112, 1 passes through the duplexer 120 and the mode switch 122, and is sent to the external antenna 123. The first and second amplifiers 110 and 111, the first bandpass filter 116, and the third amplifier 112 constitute a first processing circuit that can operate in the first frequency mode.

また、第４の分周器１０５により（１／Ｎａ）、たとえば１／２に分周した１ＧＨｚの信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第１の発振器１００に印加する。このループにより第１の発振器１００の搬送波の周波数を安定させている。   Further, a 1 GHz signal divided by (1 / Na), for example, 1/2 by the fourth frequency divider 105 is amplified by the third switching amplifier 108 and then compared by the frequency synthesizer (variable frequency divider) 118. The frequency is divided and compared with a reference frequency applied from the outside, and a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the first oscillator 100 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the first oscillator 100.

次に第２の周波数（８００ＭＨｚ）モードの場合、第２の発振器１０１から周波数Ｆ２、たとえば３．２ＧＨｚの信号を生成し、第２の分週器１０３により（１／Ｎ２）、たとえば１／２に分周され、さらに、第３の分周器１０４により（１／Ｎ３）、たとえば１／２に分周され、８００ＭＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩｂ，ｆｏＱｂを出力する。第１の切換増幅器１０６で搬送波ｆｏＩｂを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱｂを増幅する。切替増幅器１０６，１０７のそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力し変調信号を得る。以上のように、第２の周波数モードのときは、第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂが選択され、処理される。
２つの分周器１０３，１０４をひとつの分週器で構成することも可能である。この場合は、（１／Ｎ２・Ｎ３）、たとえば１／４に分周される。 Next, in the case of the second frequency (800 MHz) mode, a signal having a frequency F2, for example, 3.2 GHz, is generated from the second oscillator 101, and (1 / N2), for example, 1/2 by the second divisor 103. And further divided by (1 / N3) by, for example, 1/2, and outputs two carriers foIb and foQb having a phase difference of 90 degrees at 800 MHz. The first switching amplifier 106 amplifies the carrier wave foIb, and the second switching amplifier 107 amplifies the other carrier wave foQb that is 90 degrees out of phase. The output signals of the switching amplifiers 106 and 107 and the baseband signal from the baseband signal processing unit are input to the quadrature modulator 109 to obtain a modulation signal. As described above, in the second frequency mode, the third carrier foIb and the fourth carrier foQb are selected and processed.
It is also possible to configure the two frequency dividers 103 and 104 with one frequency divider. In this case, the frequency is divided into (1 / N2 · N3), for example, 1/4.

この出力を第４，第５の増幅器１１３，１１４で増幅し、第２のバンドパスフィルタ１１７で必要な帯域以外の周波数を除去し、第６の増幅器１１５により送信信号を増幅し、第２の共用器１２１、モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。第４，第５の増幅器１１３，１１４、第２のバンドパスフィルタ１１７、第６の増幅器１１５は、第２周波数モードのときに動作可能となる第２処理回路を構成する。   This output is amplified by the fourth and fifth amplifiers 113 and 114, the frequency other than the necessary band is removed by the second band-pass filter 117, the transmission signal is amplified by the sixth amplifier 115, and the second The signal passes through the duplexer 121 and the mode switch 122 and is sent to the external antenna 123. The fourth and fifth amplifiers 113 and 114, the second bandpass filter 117, and the sixth amplifier 115 constitute a second processing circuit that can operate in the second frequency mode.

また、第３の分周器１０４により８００ＭＨｚに分周された信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第２の発振器１０１に印加する。このループにより第２の発振器１０１の搬送波の周波数を安定させている。
第１の周波数モードと第２の周波数モードの切替は、図２に示す制御端子１２４に加わる信号により行われる。
一般に、高周波信号を扱う分周器は、分周する周波数が高ければ高いほど動作電流が多くなり、電流を多く流す必要がある。それは、分周器を構成するトランジスタの周波数特性に依存し、入力振幅に対し出力振幅を劣化させないために電流を多く流す必要がある。従って、分周器１０２より分周器１０５の方が、低い周波数を分周するので、動作電流は少ない。同様に、分周器１０３より分周器１０４の方が、低い周波数を分周するので、動作電流は少ない。 Further, the signal frequency-divided to 800 MHz by the third frequency divider 104 is amplified by the third switching amplifier 108, and then divided by the frequency synthesizer (variable frequency divider) 118 to the comparison frequency and applied from the outside. And a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the second oscillator 101 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the second oscillator 101.
Switching between the first frequency mode and the second frequency mode is performed by a signal applied to the control terminal 124 shown in FIG.
In general, a frequency divider that handles a high-frequency signal has a higher operating current as a frequency to be divided is higher, and it is necessary to flow more current. This depends on the frequency characteristics of the transistors constituting the frequency divider, and it is necessary to pass a large amount of current so as not to degrade the output amplitude with respect to the input amplitude. Therefore, since the frequency divider 105 divides a lower frequency than the frequency divider 102, the operating current is small. Similarly, since the frequency divider 104 divides a lower frequency than the frequency divider 103, the operating current is small.

図２は本実施の形態１の図１に示す第１，第２の切換増幅器１０６，１０７の内部構成のブロック図、図３は回路図を示す図である。図２，図３において、１２４は制御端子、１２５，１２６は第１，第２の周波数入力端子対、１２７は周波数出力端子対、１２８は増幅器、１２９は切換スイッチ対である。   FIG. 2 is a block diagram of the internal configuration of the first and second switching amplifiers 106 and 107 shown in FIG. 1 of the first embodiment, and FIG. 3 is a circuit diagram. 2 and 3, 124 is a control terminal, 125 and 126 are first and second frequency input terminal pairs, 127 is a frequency output terminal pair, 128 is an amplifier, and 129 is a selector switch pair.

信号を出力させる第１の切換増幅器１０６，第２の切換増幅器１０７は、図２に示すような構成になっており、第１の周波数入力端子対１２５，第２の周波数入力端子対１２６を制御端子１２４に、２ＧＨｚモード（第１の周波数）あるいは８００ＭＨｚモード（第２の周波数）に対応した制御信号を送り、切換スイッチ対１２９を制御で切り換えることにより、周波数出力端子対１２７から増幅器１２８で増幅され、前述の制御に対応した第１の周波数あるいは第２の周波数の信号が出力される。   The first switching amplifier 106 and the second switching amplifier 107 that output signals are configured as shown in FIG. 2, and control the first frequency input terminal pair 125 and the second frequency input terminal pair 126. A control signal corresponding to the 2 GHz mode (first frequency) or the 800 MHz mode (second frequency) is sent to the terminal 124, and the selector switch pair 129 is controlled to be amplified by the amplifier 128 from the frequency output terminal pair 127. Then, a signal having the first frequency or the second frequency corresponding to the above-described control is output.

回路構成については図３に示すとおり、２ＧＨｚモードでは第１の周波数入力端子対１２５から信号を入力し、制御端子１２４に２ＧＨｚモードの切換信号を送り、増幅器１２８で信号が増幅されて、周波数出力端子対１２７より信号を出力する構成である。   As for the circuit configuration, as shown in FIG. 3, in the 2 GHz mode, a signal is input from the first frequency input terminal pair 125, a 2 GHz mode switching signal is sent to the control terminal 124, the signal is amplified by the amplifier 128, and the frequency output In this configuration, a signal is output from the terminal pair 127.

このように中間周波数を使用しないことにより発振器の個数を削減でき、かつ変調器も２ＧＨｚモード，８００ＭＨｚモードを共通化することにより小型化が可能となる。   Thus, by not using the intermediate frequency, the number of oscillators can be reduced, and the modulator can be miniaturized by sharing the 2 GHz mode and the 800 MHz mode.

なお、本実施の形態１では２ＧＨｚモード，８００ＭＨｚモードを例として記述したが、これは一例であり一般化した周波数を用いても同様の効果を得られることは明らかである。   In the first embodiment, the 2 GHz mode and the 800 MHz mode are described as examples. However, this is an example, and it is obvious that the same effect can be obtained even when a generalized frequency is used.

図４は本発明の実施の形態２におけるマルチモード無線送信機の概略構成を示すブロック図である。ここで、前述の実施の形態１を示す図１において説明した構成部材に対応し同等の機能を有するものには同一の符号を付してこれを示し、以下の各図においても同様とする。図４において、１３０は第５の分周器、１３１は第６の分周器であり、第５，第６の分周器１３０，１３１以外は図１と同様なので、その説明は省略する。   FIG. 4 is a block diagram showing a schematic configuration of the multimode radio transmitter according to Embodiment 2 of the present invention. Here, components having the same functions corresponding to those described in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and the same applies to the following drawings. In FIG. 4, 130 is a fifth frequency divider, 131 is a sixth frequency divider, and the components other than the fifth and sixth frequency dividers 130 and 131 are the same as those in FIG.

第１の周波数（２ＧＨｚ）モードの場合、第１の発振器１００から４ＧＨｚの信号を生成し、第５の分周器１３０により２ＧＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩ，ｆｏＱに分周する。第１の切換増幅器１０６で搬送波ｆｏＩを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱを増幅したそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力し変調信号を得る。   In the case of the first frequency (2 GHz) mode, a signal of 4 GHz is generated from the first oscillator 100 and is divided into two carriers foI and foQ having a phase difference of 90 degrees by 2 GHz by the fifth divider 130. To do. The first switching amplifier 106 amplifies the carrier wave foI, the second switching amplifier 107 amplifies the other carrier wave foQ whose phase is shifted by 90 degrees, and the baseband signal from the baseband signal processing unit. Is input to the quadrature modulator 109 to obtain a modulated signal.

この出力を第１，第２の増幅器１１０，１１１で増幅して、第１のバンドパスフィルタ１１６で必要な帯域以外の周波数を除去し、さらに第３の増幅器１１２により送信信号を増幅し、第１の共用器１２０，モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。   The output is amplified by the first and second amplifiers 110 and 111, the frequency other than the necessary band is removed by the first band-pass filter 116, the transmission signal is further amplified by the third amplifier 112, 1 passes through the duplexer 120 and the mode switch 122, and is sent to the external antenna 123.

また、第６の分周器１３１により１ＧＨｚの信号に分周された信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第１の発振器１００に印加する。このループにより第１の発振器１００の搬送波の周波数を安定させている。   Further, the signal frequency-divided into 1 GHz signal by the sixth frequency divider 131 is amplified by the third switching amplifier 108, and then frequency-divided by the frequency synthesizer (variable frequency divider) 118 to the comparison frequency. Compared with the reference frequency applied more, a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the first oscillator 100 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the first oscillator 100.

次に第２の周波数（８００ＭＨｚ）モードの場合、第２の発振器１０１から３．２ＧＨｚの信号を生成し、第５，第６の分周器１３０，１３１により８００ＭＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩ，ｆｏＱに分周する。第１の切換増幅器１０６で搬送波ｆｏＩを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱを増幅したそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力し変調信号を得る。   Next, in the case of the second frequency (800 MHz) mode, a signal of 3.2 GHz is generated from the second oscillator 101, and the phase difference of 90 degrees between 800 MHz is generated by the fifth and sixth frequency dividers 130 and 131. The frequency is divided into two carriers foI and foQ. The first switching amplifier 106 amplifies the carrier wave foI, the second switching amplifier 107 amplifies the other carrier wave foQ whose phase is shifted by 90 degrees, and the baseband signal from the baseband signal processing unit. Is input to the quadrature modulator 109 to obtain a modulated signal.

この出力を第４，第５の増幅器１１３，１１４で増幅し、第２のバンドパスフィルタ１１７で必要な帯域以外の周波数を除去し、第６の増幅器１１５により送信信号を増幅し、第２の共用器１２１，モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。   This output is amplified by the fourth and fifth amplifiers 113 and 114, the frequency other than the necessary band is removed by the second band-pass filter 117, the transmission signal is amplified by the sixth amplifier 115, and the second The signal passes through the duplexer 121 and the mode switch 122 and is sent to the external antenna 123.

また、第６の分周器１３１により８００ＭＨｚに分周された信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第２の発振器１０１に印加する。このループにより第２の発振器１０１の搬送波の周波数を安定させている。   Further, the signal frequency-divided to 800 MHz by the sixth frequency divider 131 is amplified by the third switching amplifier 108, then divided to the comparison frequency by the frequency synthesizer (variable frequency divider) 118, and applied from the outside. And a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the second oscillator 101 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the second oscillator 101.

なお、本実施の形態２では２ＧＨｚモード，８００ＭＨｚモードを例として記述したが、これは一例であり一般化した周波数を用いても同様の効果を得られることは明らかである。   In the second embodiment, the 2 GHz mode and the 800 MHz mode are described as examples. However, this is an example, and it is obvious that the same effect can be obtained even when a generalized frequency is used.

図５は本発明の実施の形態３におけるマルチモード無線送信機の概略構成を示す図である。図５において、１３２は第３の発振器であり、第３の発振器１３２以外は前述した実施の形態２の図４と同様なのでその説明を省略する。   FIG. 5 is a diagram showing a schematic configuration of a multimode radio transmitter according to Embodiment 3 of the present invention. In FIG. 5, reference numeral 132 denotes a third oscillator. Except for the third oscillator 132, the description is omitted because it is the same as that of FIG. 4 of the second embodiment.

第１の周波数（２ＧＨｚ）モードの場合、第３の発振器１３２から４ＧＨｚの信号を生成し、第５の分周器１３０により２ＧＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩ，ｆｏＱに分周する。第１の切換増幅器１０６で搬送波ｆｏＩを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱを増幅したそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力し変調信号を得る。   In the case of the first frequency (2 GHz) mode, a 4 GHz signal is generated from the third oscillator 132, and the fifth frequency divider 130 divides the signal into two carriers foI and foQ having a phase difference of 90 degrees with respect to 2 GHz. To do. The first switching amplifier 106 amplifies the carrier wave foI, the second switching amplifier 107 amplifies the other carrier wave foQ whose phase is shifted by 90 degrees, and the baseband signal from the baseband signal processing unit. Is input to the quadrature modulator 109 to obtain a modulated signal.

この出力を第１，第２の増幅器１１０，１１１で増幅して、第１のバンドパスフィルタ１１６で必要な帯域以外の周波数を除去し、さらに第３の増幅器１１２により送信信号を増幅し、第１の共用器１２０，モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。   The output is amplified by the first and second amplifiers 110 and 111, the frequency other than the necessary band is removed by the first band-pass filter 116, the transmission signal is further amplified by the third amplifier 112, 1 passes through the duplexer 120 and the mode switch 122, and is sent to the external antenna 123.

また、第６の分周器１３１により１ＧＨｚの信号に分周された信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第３の発振器１３２に印加する。このループにより第３の発振器１３２の搬送波の周波数を安定させている。   Further, the signal frequency-divided into 1 GHz signal by the sixth frequency divider 131 is amplified by the third switching amplifier 108, and then frequency-divided by the frequency synthesizer (variable frequency divider) 118 to the comparison frequency. Compared with the reference frequency applied more, a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the third oscillator 132 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the third oscillator 132.

次に第２の周波数（８００ＭＨｚ）モードの場合、第３の発振器１３２から３．２ＧＨｚの信号を生成し、第５，第６の分周器１３０，１３１により８００ＭＨｚの互いに位相差が９０度の２つの搬送波ｆｏＩ，ｆｏＱに分周する。第１の切換増幅器１０６で搬送波ｆｏＩを増幅し、第２の切換増幅器１０７でもう一方の９０度位相のずれた搬送波ｆｏＱを増幅したそれぞれの出力信号、及びベースバンド信号処理部からのベースバンド信号を直交変調器１０９に入力し変調信号を得る。   Next, in the case of the second frequency (800 MHz) mode, a 3.2 GHz signal is generated from the third oscillator 132, and the phase difference of 90 MHz between the fifth and sixth frequency dividers 130 and 131 is 90 degrees. The frequency is divided into two carriers foI and foQ. The first switching amplifier 106 amplifies the carrier wave foI, the second switching amplifier 107 amplifies the other carrier wave foQ whose phase is shifted by 90 degrees, and the baseband signal from the baseband signal processing unit. Is input to the quadrature modulator 109 to obtain a modulated signal.

この出力を第４，第５の増幅器１１３，１１４で増幅し、第２のバンドパスフィルタ１１７で必要な帯域以外の周波数を除去し、第６の増幅器１１５により送信信号を増幅し、第２の共用器１２１，モードスイッチ１２２を通過し、外部アンテナ１２３に送られる。   This output is amplified by the fourth and fifth amplifiers 113 and 114, the frequency other than the necessary band is removed by the second band-pass filter 117, the transmission signal is amplified by the sixth amplifier 115, and the second The signal passes through the duplexer 121 and the mode switch 122 and is sent to the external antenna 123.

また、第６の分周器１３１により８００ＭＨｚに分周された信号を、第３の切換増幅器１０８で増幅後、周波数シンセサイザ（可変分周器）１１８で比較周波数に分周して、外部より印加される基準周波数と比較し、位相ずれに対応する信号を出力する。周波数シンセサイザ１１８の出力はループフィルタ１１９を介して第３の発振器１３２に印加する。このループにより第３の発振器１３２の搬送波の周波数を安定させている。   Further, the signal frequency-divided to 800 MHz by the sixth frequency divider 131 is amplified by the third switching amplifier 108, then divided to the comparison frequency by the frequency synthesizer (variable frequency divider) 118, and applied from the outside. And a signal corresponding to the phase shift is output. The output of the frequency synthesizer 118 is applied to the third oscillator 132 via the loop filter 119. This loop stabilizes the frequency of the carrier wave of the third oscillator 132.

なお、本実施の形態３では２ＧＨｚモード，８００ＭＨｚモードを例として記述したが、これは一例であり一般化した周波数を用いても同様の効果を得られることは明らかである。   In the third embodiment, the 2 GHz mode and the 800 MHz mode are described as examples. However, this is an example, and it is obvious that the same effect can be obtained even when a generalized frequency is used.

また、本実施の携帯１〜３のマルチモード無線送信機を用いて、直交変調器の出力段に接続した第１〜６の増幅器、第１，第２のバンドパスフィルタ、第１，第２の共用器、モードスイッチ、外部アンテナと、第１，第２の共用器を介して接続した受信手段（ＲＸ）により無線送信機を構成しても良い。   In addition, the first to sixth amplifiers, the first and second band-pass filters, the first and the second, which are connected to the output stage of the quadrature modulator, using the portable 1 to 3 multimode wireless transmitters of the present embodiment. The radio transmitter may be configured by the duplexer, the mode switch, the external antenna, and the receiving means (RX) connected via the first and second duplexers.

本発明に係るマルチモード無線送信機及びこれを用いた携帯無線機は、中間周波数を使用せず発振器の個数を削減し、かつ変調器も共通化して小型化でき、直交変調器の共通化によりベースバンド信号処理部の信号入力端子を少なく、キャリアリークの調整も容易にでき、携帯無線通信機器の高周波集積回路等として有用である。   The multi-mode wireless transmitter according to the present invention and the portable wireless device using the same can reduce the number of oscillators without using an intermediate frequency, and can also be downsized by using a common modulator. There are few signal input terminals of a baseband signal processing part, adjustment of a carrier leak can be performed easily, and it is useful as a high frequency integrated circuit etc. of a portable wireless communication apparatus.

本発明の実施の形態１におけるマルチモード無線送信機の概略構成を示すブロック図1 is a block diagram showing a schematic configuration of a multimode radio transmitter according to Embodiment 1 of the present invention. 本実施の形態１における切換増幅器の内部構成を示すブロック図The block diagram which shows the internal structure of the switching amplifier in this Embodiment 1. 本実施の形態１における切換増幅器の回路図Circuit diagram of the switching amplifier according to the first embodiment 本発明の実施の形態２におけるマルチモード無線送信機の概略構成を示すブロック図FIG. 2 is a block diagram showing a schematic configuration of a multimode radio transmitter according to Embodiment 2 of the present invention. 本発明の実施の形態３におけるマルチモード無線送信機の概略構成を示すブロック図FIG. 3 is a block diagram showing a schematic configuration of a multimode radio transmitter according to Embodiment 3 of the present invention.

符号の説明Explanation of symbols

１００，１０１，１３２ 発振器
１０２，１０３，１０４，１０５，１３０，１３１ 分周器
１０６，１０７，１０８ 切換増幅器
１０９ 直交変調器
１１０，１１１，１１２，１１３，１１４，１１５ 増幅器
１１６，１１７ バンドパスフィルタ
１１８ 周波数シンセサイザ
１１９ ループフィルタ
１２０，１２１ 共用器
１２２ モードスイッチ
１２３ アンテナ
１２４ 制御端子
１２５，１２６ 周波数入力端子対
１２７ 周波数出力端子対
１２８ 増幅器
100, 101, 132 Oscillators 102, 103, 104, 105, 130, 131 Frequency dividers 106, 107, 108 Switching amplifier 109 Quadrature modulators 110, 111, 112, 113, 114, 115 Amplifiers 116, 117 Band pass filter 118 Frequency synthesizer 119 Loop filter 120, 121 Duplexer 122 Mode switch 123 Antenna 124 Control terminal 125, 126 Frequency input terminal pair 127 Frequency output terminal pair 128 Amplifier

Claims (9)

所定の周波数で発振する第１の発振器と、
前記第１の発振器で生成した信号の周波数を２分の１に分周すると共に、互いに位相が９０度異なる第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａを出力する第１の分周器と、
前記第１の発振器と異なる所定の周波数で発振する第２の発振器と、
前記第２の発振器で生成した信号の周波数を２分の１に分周する第２の分周器と、
前記第２の分周器の出力信号の周波数を更に２分の１に分周すると共に、互いに位相が９０度異なる第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂを出力する第３の分周器と、
第１の搬送波ｆｏＩａと、第３の搬送波ｆｏＩｂを受け、制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第１の切換増幅器と、
第２の搬送波ｆｏＱａと、第４の搬送波ｆｏＱｂを受け、上記制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第２の切換増幅器と、
ベースバンド信号を、前記第１及び第２の切換増幅器のそれぞれの出力信号により直交変調する直交変調器と
を備えたことを特徴とするマルチモード無線送信機。 A first oscillator that oscillates at a predetermined frequency;
A first frequency divider that divides the frequency of the signal generated by the first oscillator by a half and outputs a first carrier wave foIa having a phase difference of 90 degrees and a second carrier wave foQa; ,
A second oscillator that oscillates at a predetermined frequency different from that of the first oscillator;
A second frequency divider that divides the frequency of the signal generated by the second oscillator by half;
The frequency of the output signal of the second frequency divider is further divided by half, and the third frequency dividing unit outputs a third carrier foIb and a fourth carrier foQb whose phases are different from each other by 90 degrees. And
A first switching amplifier that receives the first carrier foIa and the third carrier foIb, selects one of the carriers by a control signal, amplifies and outputs the selected carrier;
A second switching amplifier that receives the second carrier foQa and the fourth carrier foQb, selects one of the carriers by the control signal, amplifies and outputs the selected carrier;
A multimode radio transmitter comprising: a quadrature modulator that quadrature-modulates a baseband signal with respective output signals of the first and second switching amplifiers. 更に、前記第１の分周器の出力信号の周波数を更に２分の１に分周する第４の分周器と、
前記第３の分周器からの出力信号と、前記第４の分周器からの出力信号を受け、上記制御信号によりいずれか一方の出力信号を選択し、選択した出力信号を増幅し出力する第３の切換増幅器と、
前記選択した出力信号を、所定の基準信号と比較し、位相ズレに対応した信号を出力する周波数シンセサイザと、
前記周波数シンセサイザの出力信号を受けるループフィルタとを備え、
ループフィルタの出力を用いて前記第１の発振器または前記第２の発振器の発振周波数を安定させることを特徴とする請求項１記載のマルチモード無線送信機。 A fourth frequency divider that further divides the frequency of the output signal of the first frequency divider by half;
The output signal from the third frequency divider and the output signal from the fourth frequency divider are received, one of the output signals is selected by the control signal, and the selected output signal is amplified and output. A third switching amplifier;
A frequency synthesizer that compares the selected output signal with a predetermined reference signal and outputs a signal corresponding to a phase shift;
A loop filter that receives an output signal of the frequency synthesizer,
The multimode radio transmitter according to claim 1, wherein an oscillation frequency of the first oscillator or the second oscillator is stabilized using an output of a loop filter. 前記第１の分周器と第２の分周器を一つの分周器で構成したことを特徴とする請求項１記載のマルチモード無線送信機。   2. The multimode radio transmitter according to claim 1, wherein the first frequency divider and the second frequency divider are configured by one frequency divider. 前記第３の分周器と第４の分周器を一つの分周器で構成したことを特徴とする請求項１記載のマルチモード無線送信機。   2. The multimode radio transmitter according to claim 1, wherein the third frequency divider and the fourth frequency divider are configured by a single frequency divider. 前記第１の発振器と第２の発振器を一つの発振器で構成したことを特徴とする請求項１記載のマルチモード無線送信機。   2. The multimode radio transmitter according to claim 1, wherein the first oscillator and the second oscillator are constituted by one oscillator. 前記第１分周器より第４分周器の方が、動作電流が少ないことを特徴とする請求項１記載のマルチモード無線送信機。   The multimode wireless transmitter according to claim 1, wherein the fourth frequency divider has a smaller operating current than the first frequency divider. 前記第２分周器より第３分周器の方が、動作電流が少ないことを特徴とする請求項１記載のマルチモード無線送信機。   The multimode wireless transmitter according to claim 1, wherein the third frequency divider has a smaller operating current than the second frequency divider. 所定の周波数で発振する第１の発振器と、
前記第１の発振器で生成した信号の周波数を２分の１に分周すると共に、互いに位相が９０度異なる第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａを出力する第１の分周器と、
前記第１の発振器と異なる所定の周波数で発振する第２の発振器と、
前記第２の発振器で生成した信号の周波数を２分の１に分周する第２の分周器と、
前記第２の分周器の出力信号の周波数を更に２分の１に分周すると共に、互いに位相が９０度異なる第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂを出力する第３の分周器と、
第１の搬送波ｆｏＩａと、第３の搬送波ｆｏＩｂを受け、制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第１の切換増幅器と、
第２の搬送波ｆｏＱａと、第４の搬送波ｆｏＱｂを受け、上記制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力する第２の切換増幅器と、
ベースバンド信号を、前記第１及び第２の切換増幅器のそれぞれの出力信号により直交変調する直交変調器と、
第１の処理回路と、
第２の処理回路とを備え、
前記第１の処理回路は、第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａが選択されたときに動作可能となる
前記直交変調器からの出力を増幅する第１増幅手段と、
前記第１増幅手段に接続した第１アンテナ共用手段と
を有し、
前記第２の処理回路は、第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂが選択されたときに動作可能となる
前記直交変調器からの出力を増幅する第２増幅手段と、
前記第１増幅手段に接続した第２アンテナ共用手段と
を有し、更に、
前記第１アンテナ共用手段と、第２アンテナ共用手段とに切替可能なスイッチと、
前記スイッチに接続されたアンテナと
を備えたことを特徴とする携帯無線機。 A first oscillator that oscillates at a predetermined frequency;
A first frequency divider that divides the frequency of the signal generated by the first oscillator by a half and outputs a first carrier wave foIa having a phase difference of 90 degrees and a second carrier wave foQa; ,
A second oscillator that oscillates at a predetermined frequency different from that of the first oscillator;
A second frequency divider that divides the frequency of the signal generated by the second oscillator by half;
The frequency of the output signal of the second frequency divider is further divided by half, and the third frequency dividing unit outputs a third carrier foIb and a fourth carrier foQb whose phases are different from each other by 90 degrees. And
A first switching amplifier that receives the first carrier foIa and the third carrier foIb, selects one of the carriers by a control signal, amplifies and outputs the selected carrier;
A second switching amplifier that receives the second carrier foQa and the fourth carrier foQb, selects one of the carriers by the control signal, amplifies and outputs the selected carrier;
A quadrature modulator that quadrature modulates a baseband signal with respective output signals of the first and second switching amplifiers;
A first processing circuit;
A second processing circuit,
The first processing circuit is operable when a first carrier wave foIa and a second carrier wave foQa are selected, and first amplification means for amplifying an output from the quadrature modulator;
First antenna sharing means connected to the first amplification means,
The second processing circuit is operable when a third carrier foIb and a fourth carrier foQb are selected; a second amplifying unit that amplifies an output from the quadrature modulator;
Second antenna sharing means connected to the first amplification means, and
A switch that can be switched between the first antenna sharing means and the second antenna sharing means;
A portable radio having an antenna connected to the switch. 所定の第１の周波数で発振し、
前記第１の周波数を２分の１に分周すると共に、互いに位相が９０度異なる第１の搬送波ｆｏＩａと、第２の搬送波ｆｏＱａを出力し、
前記第１の周波数と異なる所定の第２周波数で発振し、
前記第２の周波数を２分の１に分周し、
１／２に分周された第２の周波数を更に２分の１に分周すると共に、互いに位相が９０度異なる第３の搬送波ｆｏＩｂと、第４の搬送波ｆｏＱｂを出力し、
第１の搬送波ｆｏＩａと、第３の搬送波ｆｏＩｂを受け、制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力し、
第２の搬送波ｆｏＱａと、第４の搬送波ｆｏＱｂを受け、上記制御信号によりいずれか一方の搬送波を選択し、選択した搬送波を増幅し出力し、
ベースバンド信号を、選択された２つの出力信号により直交変調することを特徴とするマルチモード無線送信方法。
Oscillates at a predetermined first frequency,
The first frequency is divided by half, and a first carrier foIa and a second carrier foQa that are 90 degrees out of phase with each other are output,
Oscillates at a predetermined second frequency different from the first frequency;
Dividing the second frequency by one half,
The second frequency divided by ½ is further divided by half, and a third carrier foIb and a fourth carrier foQb that are 90 degrees out of phase with each other are output,
Receiving the first carrier foIa and the third carrier foIb, selecting one of the carriers by the control signal, amplifying and outputting the selected carrier;
Receiving the second carrier foQa and the fourth carrier foQb, selecting one of the carriers by the control signal, amplifying and outputting the selected carrier;
A multi-mode wireless transmission method characterized by orthogonally modulating a baseband signal with two selected output signals.
JP2005030439A 2004-03-04 2005-02-07 Multi-mode radio transmitter and portable radio using the same Expired - Fee Related JP3970284B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7973574B2 (en) 2008-03-11 2011-07-05 Samsung Electronics Co., Ltd. Flip-flop, frequency divider and RF circuit having the same
WO2014083726A1 (en) * 2012-11-29 2014-06-05 旭化成エレクトロニクス株式会社 Demodulator and modulator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7973574B2 (en) 2008-03-11 2011-07-05 Samsung Electronics Co., Ltd. Flip-flop, frequency divider and RF circuit having the same
US8049546B2 (en) 2008-03-11 2011-11-01 Samsung Electronics Co., Ltd. Flip-flop, frequency divider and RF circuit having the same
WO2014083726A1 (en) * 2012-11-29 2014-06-05 旭化成エレクトロニクス株式会社 Demodulator and modulator
JP5621060B1 (en) * 2012-11-29 2014-11-05 旭化成エレクトロニクス株式会社 Demodulator and modulator

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