JPH10322238A - Transmitter-receiver of superheterodyne system - Google Patents
Transmitter-receiver of superheterodyne systemInfo
- Publication number
- JPH10322238A JPH10322238A JP9141062A JP14106297A JPH10322238A JP H10322238 A JPH10322238 A JP H10322238A JP 9141062 A JP9141062 A JP 9141062A JP 14106297 A JP14106297 A JP 14106297A JP H10322238 A JPH10322238 A JP H10322238A
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- Prior art keywords
- frequency
- local oscillator
- divider
- frequency divider
- oscillator
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はス−パーヘテロダイ
ン方式の送受信機に関し、特に携帯電話機や自動車電話
機に好適なス−パーヘテロダイン方式の送受信機に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superheterodyne transceiver and, more particularly, to a superheterodyne transceiver suitable for a portable telephone or an automobile telephone.
【０００２】[0002]
【従来の技術】図５は携帯電話機や自動車電話機に使用
される従来のス−パーヘテロダイン方式の送受信機の構
成例を示す図である。図示するように、従来のス−パー
ヘテロダイン方式の送受信機はアンテナ１、該アンテナ
１を送信と受信で共用する為のアンテナ共用器２、高周
波増幅器３、不要波を除去するためのバンドパスフィル
タ４、ダウンコンバ−ジョンするためのミキサ５、第１
中間周波フィルタ６、第１中間周波増幅器７、ミキサ
８、第２中間周波フィルタ９、第２中間周波増幅器１
０、第１局部発振器１１、受信用第２局部発振器１２、
送信用第２局部発振器１３、変調器１４、高調波を除去
するためのロ−パスフィルタ１５、ミキサ１６、バンド
パスフィルタ１７、規定電力まで増幅するための電力増
幅器１８を具備する。2. Description of the Related Art FIG. 5 is a diagram showing an example of the configuration of a conventional superheterodyne transceiver used in a portable telephone or an automobile telephone. As shown in the figure, a conventional superheterodyne transceiver includes an antenna 1, an antenna duplexer 2 for sharing the antenna 1 for transmission and reception, a high-frequency amplifier 3, and a band-pass filter for removing unnecessary waves. 4. Mixer for down-conversion 5, first
Intermediate frequency filter 6, first intermediate frequency amplifier 7, mixer 8, second intermediate frequency filter 9, second intermediate frequency amplifier 1
0, a first local oscillator 11, a second local oscillator 12 for reception,
A second local oscillator 13 for transmission, a modulator 14, a low-pass filter 15 for removing harmonics, a mixer 16, a band-pass filter 17, and a power amplifier 18 for amplifying to a specified power.
【０００３】上記構成の送受信機において、受信時、ア
ンテナ１で受信された受信信号はアンテナ共用器２で分
離された後、高周波増幅器３に送られ増幅される。増幅
された信号はバンドパスフィルタ４で不要波が除去され
た後、ミキサ５において第１局部発振器１１からの第１
局部発振周波数でダウンコンバ−ジョンされ、第１中間
周波フィルタ６で不要波が除去され第１中間周波信号と
なり、第１中間周波増幅器７で増幅される。さらに、第
１中間周波信号はミキサ８で受信用第２局部発振器１２
からの受信用第２局部発振周波数でダウンコンバ−ジョ
ンされ、第２中間周波フィルタ９で不要波が除去され第
２中間周波信号となり、第２中間周波増幅器１０で増幅
され復調器（図示省略）で復調される。In the transceiver having the above configuration, at the time of reception, a received signal received by the antenna 1 is separated by the antenna duplexer 2 and then sent to the high-frequency amplifier 3 for amplification. After the amplified signal is subjected to bandpass filter 4 to remove unnecessary waves, the mixer 5 outputs the first signal from the first local oscillator 11.
Down-conversion is performed at the local oscillation frequency, and unnecessary waves are removed by the first intermediate frequency filter 6 to become a first intermediate frequency signal, which is amplified by the first intermediate frequency amplifier 7. Further, the first intermediate frequency signal is supplied to the mixer 8 by the second local oscillator 12 for reception.
Down-converted by the second local oscillation frequency for reception from the receiver, unnecessary waves are removed by the second intermediate frequency filter 9 to form a second intermediate frequency signal, which is amplified by the second intermediate frequency amplifier 10 and demodulated (not shown). Is demodulated.
【０００４】一方、ベ−スバンドの信号は変調器１４に
おいて、送信用第２局部発振器１３からの送信用第２局
部発振周波数で変調された後、ロ−パスフィルタ１５で
不要波が除去される。不要波が除去された信号はミキサ
１６において第１局部発振器１１からの第１局部発振周
波数でアップコンバ−ジョンされ、バンドパスフィルタ
１７で不要波が除去された後、電力増幅器１８で規定電
力まで増幅される。規定電力まで増幅された信号は、ア
ンテナ共用器２を介してアンテナ１に供給される。On the other hand, the baseband signal is modulated by a modulator 14 at a second local oscillation frequency for transmission from a second local oscillator 13 for transmission, and then an unnecessary wave is removed by a low-pass filter 15. . The signal from which the unnecessary wave has been removed is up-converted by the mixer 16 at the first local oscillation frequency from the first local oscillator 11, the unnecessary wave is removed by the band-pass filter 17, and the power is increased to the specified power by the power amplifier 18. Amplified. The signal amplified to the specified power is supplied to the antenna 1 via the antenna duplexer 2.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
たように従来構成の送受信機は受信用第２局部発振器１
２及び送信用第２局部発振器１３を有しており、その駆
動のために大きな消費電力を必要とし、またこれら発振
器を基板に実装した場合その実装面積も大きくなり、携
帯電話機や自動車電話機の小型化に不都合となるという
問題があった。However, as described above, the transceiver of the conventional configuration has the second local oscillator 1 for reception.
2 and the second local oscillator 13 for transmission, which require large power consumption for driving. When these oscillators are mounted on a board, the mounting area becomes large, and the size of a mobile phone or a mobile phone is reduced. There was a problem that it would be inconvenient for conversion.
【０００６】本発明は上述の点に鑑みてなされたもの
で、受信系及び送信系の第２局部発振器を１つの発振器
で共用して用いることにより、小型化及び低消費電力化
に適したス−パーヘテロダイン方式の送受信機を提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and uses a single local oscillator for a receiving system and a transmitting system for a single oscillator, thereby achieving a switch suitable for miniaturization and low power consumption. -To provide a perheterodyne transceiver.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
請求項１に記載の発明は、受信系と送信系を具備し、少
なくとも第１及び第２の周波数変換手段を有するス−パ
ーヘテロダイン方式の送受信機において、受信系及び送
信系の第２局部発振器を１つの発振器で共用させ、該発
振器の出力周波数をＮ分周した周波数を受信系の第２の
周波数変換手段に供給し、Ｍ分周した周波数を送信系に
供給する分周手段を設けたことを特徴とする。According to a first aspect of the present invention, there is provided a super heterodyne system comprising a receiving system and a transmitting system and having at least first and second frequency converting means. The second local oscillator of the receiving system and the transmitting system is shared by one oscillator, and the frequency obtained by dividing the output frequency of the oscillator by N is supplied to the second frequency converting means of the receiving system. It is characterized in that a frequency dividing means for supplying the divided frequency to the transmission system is provided.
【０００８】また、請求項２に記載の発明は、請求項１
に記載のス−パーヘテロダイン方式の送受信機におい
て、前記分周手段は分周比がＮのＮ分周器と分周比がＭ
のＭ分周器で構成され、発振器の出力をＮ分周器を通し
て受信系の第２の周波数変換手段に、Ｍ分周器を通して
送信系に供給することを特徴とする。[0008] The invention described in claim 2 is the first invention.
3. The superheterodyne transceiver according to claim 2, wherein the frequency dividing means includes an N frequency divider having a frequency dividing ratio of N and a frequency dividing ratio of M.
Wherein the output of the oscillator is supplied to the second frequency conversion means of the reception system through the N frequency divider and to the transmission system through the M frequency divider.
【０００９】また、請求項３に記載の発明は、請求項１
に記載のス−パーヘテロダイン方式の送受信機におい
て、前記分周手段は切替信号により、分周比をＮ又はＭ
に切替ることができる切替分周器で構成され、前記発振
器の出力周波数を該切替分周器でＮ分周して受信系の第
２の周波数変換手段に、Ｍ分周して送信系に供給するこ
とを特徴とする。[0009] The invention described in claim 3 is the first invention.
3. The superheterodyne transceiver according to claim 2, wherein said frequency dividing means sets a frequency dividing ratio to N or M by a switching signal.
The switching frequency divider is configured to divide the output frequency of the oscillator by N to the second frequency conversion means of the receiving system and to divide the output frequency by M to the transmitting system. It is characterized by supplying.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態例を図面
に基づいて詳細に説明する。図１は本発明のス−パーヘ
テロダイン方式の送受信機の構成例を示す図である。同
図において、図５と同一符号を付した部分は同一部分を
示すのでここではその説明は省略する。なお、他の図面
においても同様とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an example of the configuration of a superheterodyne transceiver according to the present invention. In the same figure, the parts denoted by the same reference numerals as those in FIG. 5 indicate the same parts, and the description thereof is omitted here. The same applies to other drawings.
【００１１】図示するように、本発明のス−パーヘテロ
ダイン方式の送受信機は分周比ＮのＮ分周器２１、分周
比ＭのＭ分周器２２及び第２局部発振器２３を設け、第
２局部発振器２３の出力周波数をＮ分周器２１でＮ分周
した周波数をミキサ８（第２中間周波変換用）に供給
し、Ｍ分周器２２でＭ分周した周波数を変調器１４に供
給することにより、一台の第２局部発振器２３を送信系
及び受信系で共用することを特徴とする。As shown in the figure, a superheterodyne transceiver according to the present invention includes an N frequency divider 21 having a frequency division ratio N, an M frequency divider 22 having a frequency division ratio M, and a second local oscillator 23. The frequency obtained by dividing the output frequency of the second local oscillator 23 by N by the N divider 21 is supplied to the mixer 8 (for second intermediate frequency conversion), and the frequency obtained by dividing the M by the M divider 22 is modulated by the modulator 14. , So that one second local oscillator 23 is shared by the transmission system and the reception system.
【００１２】第２局部発振器２３としてＰＬＬ（フェ−
ズロックドル−プ）周波数シンセサイザを使用すること
もできる。なお、分周比Ｎ＝１及び分周比Ｍ＝１の時は
Ｎ分周器２１及びＭ分周器２２は不要になる。As a second local oscillator 23, a PLL (facility) is used.
A (slope loop) frequency synthesizer can also be used. When the dividing ratio N = 1 and the dividing ratio M = 1, the N divider 21 and the M divider 22 become unnecessary.
【００１３】次に、中間周波数と分周比Ｍ、分周比Ｎの
設定例を示す。受信周波数をｆRX、送信周波数をｆTX、
第１局部発振周波数をｆ1、第２局部発振周波数をｆ2、
第１中間周波数をｆ1IF、第２中間周波数をｆ2IFとし、
各々Ｌｏｗｅｒ Ｌｏｃａｌ方式とした場合、各周波数
の間に次式が与えられる。 ｆ1＋ｆ1IF＝ｆRX （１） ｆ2／Ｍ＋ｆ2IF＝ｆ1IF （２） ｆ2／Ｎ＋ｆ1＝ｆTX （３）Next, an example of setting the intermediate frequency, the dividing ratio M and the dividing ratio N will be described. The reception frequency is f RX , the transmission frequency is f TX ,
The first local oscillation frequency is f 1 , the second local oscillation frequency is f 2 ,
The first intermediate frequency f 1IF, the second intermediate frequency is f 2IF,
In the case of each of the lower local systems, the following equation is given between the respective frequencies. f 1 + f 1IF = f RX (1) f 2 / M + f 2IF = f 1IF (2) f 2 / N + f 1 = f TX (3)
【００１４】上記（１）、（２）、（３）式より ｆ2＝｛（ｆRX−ｆTX−ｆ2IF）｝×Ｍ＋｛Ｎ／（Ｍ−Ｎ）｝ （４） 上記式で受信周波数ｆRX及び送信周波数ｆTXはシステム
で決定されるため第２中間周波数ｆ2IF及び分周比Ｎ、
分周比Ｍの値を設定すれば、第２局部発振周波数ｆ2が
決定されることが分かる。From the above equations (1), (2) and (3), f 2 = {(f RX −f TX −f 2IF )} × M + {N / (M−N)} (4) Since the frequency f RX and the transmission frequency f TX are determined by the system, the second intermediate frequency f 2IF and the dividing ratio N,
By setting the value of the frequency division ratio M, it can be seen that the second local oscillation frequency f 2 is determined.
【００１５】上述したように本実施例によればＮ分周器
２１、Ｍ分周器２２を設けることにより、従来は送信系
と受信系にそれぞれ使用していた２台の第２局部発振器
が一台で済むことになり、その駆動のための消費電力が
減少する。また、分周器はＩＣ化が容易で他のＩＣ部品
に容易に組み込むことができるので小型化が可能とな
る。更に、第２局部発振器２３としてＰＬＬ周波数シン
セサイザを使用した場合、ＰＬＬの比較周波数を各々Ｎ
倍、Ｍ倍で使用できるためロックアップタイムを高速に
することができ、周波数の立上りが速くなり更に低消費
電力化できる。As described above, according to the present embodiment, by providing the N frequency divider 21 and the M frequency divider 22, two second local oscillators conventionally used for the transmission system and the reception system, respectively, can be used. Only one device is required, and power consumption for driving the device is reduced. Further, since the frequency divider can be easily integrated into an IC and can be easily incorporated into another IC component, the size can be reduced. Further, when a PLL frequency synthesizer is used as the second local oscillator 23, the comparison frequency of the PLL is set to N
Since it can be used twice or M times, the lock-up time can be shortened, and the rise of the frequency becomes faster, so that the power consumption can be further reduced.
【００１６】図２は本発明のス−パーヘテロダイン方式
の送受信機の他の構成例を示す図である。同図はベ−ス
バンドの信号が変調器１４において送信周波数で変調さ
れる直接変調方式の場合である。FIG. 2 is a diagram showing another example of the configuration of the superheterodyne transceiver according to the present invention. FIG. 2 shows a case of a direct modulation system in which a baseband signal is modulated at a transmission frequency in a modulator 14.
【００１７】第２局部発振器２３の出力周波数はＭ分周
器２２でＭ分周され、ミキサ２４に供給され、該ミキサ
２４で第１局部発振器１１の出力周波数と混合し、バン
ドパスフィルタ２５で不要波を除去した後、変調器１４
に供給する。中間周波数と分周比Ｍ、分周比Ｎの関係は
図１の場合と同じなのでその説明は省略する。この場合
も図１に示す場合と同様に低消費電力化及び小型化が可
能となる。The output frequency of the second local oscillator 23 is frequency-divided by the M frequency divider 22 and supplied to the mixer 24, where it is mixed with the output frequency of the first local oscillator 11, After removing unnecessary waves, the modulator 14
To supply. The relationship between the intermediate frequency and the division ratios M and N is the same as in FIG. In this case as well, low power consumption and miniaturization can be achieved as in the case shown in FIG.
【００１８】図３は本発明のス−パーヘテロダイン方式
の送受信機の他の構成例を示す図である。同図に示す送
受信機は、図示するように、図１の送受信機のＮ分周器
２１及びＭ分周器２２に替え、第２局部発振器２３及び
分周が比Ｎ又はＭに切替る切替分周器２６を設けたもの
である。受信時（受信スロットで受信中）は切替分周器
２６の分周比をＮに切替えて第２局部発振器２３の出力
周波数をＮ分周してミキサ８（第２中間周波変換用）に
供給し、送信時（送信スロットで送信中）は切替分周器
２６の分周比をＭに切替えて第２局部発振器２３の出力
周波数をＭ分周して変調器１４に供給する。FIG. 3 is a diagram showing another example of the configuration of the superheterodyne transceiver according to the present invention. As shown in the figure, the transceiver shown in FIG. 2 is replaced with the N frequency divider 21 and the M frequency divider 22 of the transceiver shown in FIG. 1, and the second local oscillator 23 and the frequency divider are switched to the ratio N or M. A frequency divider 26 is provided. During reception (during reception in the reception slot), the frequency division ratio of the switching frequency divider 26 is switched to N, and the output frequency of the second local oscillator 23 is frequency-divided by N and supplied to the mixer 8 (for second intermediate frequency conversion). During transmission (during transmission in the transmission slot), the frequency division ratio of the switching frequency divider 26 is switched to M, and the output frequency of the second local oscillator 23 is frequency-divided by M and supplied to the modulator 14.
【００１９】送受信機を上記のように構成することによ
り、第２局部発振器２３及び切替分周器２６を設け、送
信時及び受信時で切替分周器２６の分周比をＮ分周又は
Ｍ分周に切替えて使用するので、図１に示す場合と同様
に低消費電力化及び小型化が可能となる。中間周波数と
分周比Ｍ、分周比Ｎの関係は図１の場合と同じなのでこ
こではその説明は省略する。By constructing the transceiver as described above, the second local oscillator 23 and the switching frequency divider 26 are provided, and the frequency division ratio of the switching frequency divider 26 is divided by N or M during transmission and reception. Since the frequency is switched and used, the power consumption can be reduced and the size can be reduced as in the case shown in FIG. The relationship between the intermediate frequency and the division ratio M and the division ratio N is the same as in FIG. 1, and the description is omitted here.
【００２０】図４は本発明のス−パーヘテロダイン方式
の送受信機の他の構成例を示す図である。同図に示す送
受信機は図２と同様ベ−スバンドの信号が変調器１４に
おいて、送信周波数で変調される直接変調方式に第２局
部発振器２３及び切替分周器２６を設けたものである。FIG. 4 is a diagram showing another example of the configuration of the superheterodyne transceiver according to the present invention. The transmitter / receiver shown in FIG. 6 is similar to FIG. 2 except that a baseband signal is modulated in a modulator 14 by a direct modulation method at a transmission frequency and a second local oscillator 23 and a switching frequency divider 26 are provided.
【００２１】受信時は切替分周器２６の分周比はＮ分周
に切り替えられ、第２局部発振器２３の出力周波数はＮ
分周され、ミキサ８（第２中間周波変換用）に供給され
る。送信時は切替分周器２６の分周比はＭ分周に切り替
えられ、第２局部発振器２３の出力周波数はＭ分周され
てミキサ２４で第１局部発振器１１の出力周波数と混合
されバンドパスフィルタ２５で不要波を除去した後、変
調器１４に供給される。At the time of reception, the frequency division ratio of the switching frequency divider 26 is switched to N, and the output frequency of the second local oscillator 23 is N.
The frequency is divided and supplied to the mixer 8 (for the second intermediate frequency conversion). During transmission, the frequency division ratio of the switching frequency divider 26 is switched to frequency division by M, the output frequency of the second local oscillator 23 is frequency-divided by M, mixed with the output frequency of the first local oscillator 11 by the mixer 24, and band-passed. After removing unnecessary waves by the filter 25, the signal is supplied to the modulator 14.
【００２２】送受信機を上記のように構成することによ
り、第２局部発振器２３及び切替分周器２６を設け、送
信時及び受信時で切替分周器２６の分周比をＮ分周又は
Ｍ分周に切替えて使用するので、図１に示す場合と同様
に低消費電力化及び小型化が可能となる。中間周波数と
分周比Ｍ、分周比Ｎの関係は図１と同じなのでここでは
その説明を省略する。By configuring the transceiver as described above, the second local oscillator 23 and the switching frequency divider 26 are provided, and the frequency division ratio of the switching frequency divider 26 is divided by N or M during transmission and reception. Since the frequency is switched and used, the power consumption can be reduced and the size can be reduced as in the case shown in FIG. The relationship between the intermediate frequency and the division ratio M and the division ratio N is the same as in FIG. 1, and the description thereof is omitted here.
【００２３】[0023]
【発明の効果】以上説明したように、請求項１に記載の
発明によれば、下記のような優れた効果が得られる。As described above, according to the first aspect of the invention, the following excellent effects can be obtained.
【００２４】（１）受信系及び送信系の第２局部発振器
を１つの発振器で共用させ、発振器の出力周波数をＮ分
周した周波数を受信系の第２の周波数変換段に供給し、
Ｍ分周した周波数を送信系に供給する分周手段を設けた
ので、従来は送信系と受信系にそれぞれ使用していた２
つ第２局部発振器が一つで済むことになり、その分消費
電力が減少する。(1) The second local oscillator of the receiving system and the transmitting system is shared by one oscillator, and a frequency obtained by dividing the output frequency of the oscillator by N is supplied to a second frequency conversion stage of the receiving system.
Since the frequency dividing means for supplying the frequency divided by M to the transmitting system is provided, the frequency dividing means conventionally used for the transmitting system and the receiving system is used.
Only one second local oscillator is required, and the power consumption is reduced accordingly.
【００２５】（２）また、第２局部発振器としてＰＬＬ
周波数シンセサイザを使用した場合、ＰＬＬの比較周波
数を各々Ｎ倍、Ｍ倍で使用できるためロックアップタイ
ムを高速にすることができ、周波数の立上りが速くなり
更に低消費電力化できる。(2) A PLL is used as the second local oscillator.
When the frequency synthesizer is used, the lock-up time can be shortened because the comparison frequency of the PLL can be used by N times and M times, respectively, and the rise of the frequency becomes faster, so that the power consumption can be further reduced.
【００２６】また、請求項２に記載の発明によれば、分
周手段は分周比がＮのＮ分周器と分周比がＭのＭ分周器
で構成され、分周器はＩＣ化が容易で他のＩＣ部品に容
易に組み込むことができ、小型化が可能となるという優
れた効果が得られる。According to the second aspect of the present invention, the frequency dividing means includes an N frequency divider having a frequency dividing ratio of N and an M frequency divider having a frequency dividing ratio of M. An excellent effect is obtained that it can be easily integrated into other IC components and can be reduced in size.
【００２７】また、請求項３に記載の発明によれば、分
周手段は切替信号により、分周比をＮ又はＭに切替るこ
とができる切替分周器で構成されるので、請求項２に記
載の発明と同様小型化が可能となるという優れた効果が
得られる。According to the third aspect of the present invention, the frequency dividing means is constituted by a switching frequency divider capable of switching the frequency dividing ratio to N or M by a switching signal. As in the invention described in (1), an excellent effect that downsizing can be achieved is obtained.
【図１】本発明のス−パーヘテロダイン方式の送受信機
の構成例を示す図である。FIG. 1 is a diagram showing a configuration example of a super heterodyne type transceiver of the present invention.
【図２】本発明のス−パーヘテロダイン方式の送受信機
の構成例を示す図である。FIG. 2 is a diagram illustrating a configuration example of a transmitter / receiver of a superheterodyne system according to the present invention.
【図３】本発明のス−パーヘテロダイン方式の送受信機
の構成例を示す図である。FIG. 3 is a diagram showing a configuration example of a super heterodyne type transceiver of the present invention.
【図４】本発明のス−パーヘテロダイン方式の送受信機
の構成例を示す図である。FIG. 4 is a diagram showing a configuration example of a super heterodyne type transceiver of the present invention.
【図５】従来のス−パーヘテロダイン方式の送受信機の
構成例を示す図である。FIG. 5 is a diagram illustrating a configuration example of a conventional super heterodyne type transceiver.
１ アンテナ ２ アンテナ共用器 ３ 高周波増幅器 ４ バンドパスフィルタ ５ ミキサ ６ 第１中間周波フィルタ ７ 第１中間周波増幅器 ８ ミキサ ９ 第２中間周波フィルタ １０ 第２中間周波増幅器 １１ 第１局部発振器 １２ 受信用第２局部発振器 １３ 送信用第２局部発振器 １４ 変調器 １５ ロ−パスフィルタ １６ ミキサ １７ バンドパスフィルタ １８ 電力増幅器 ２１ Ｎ分周器 ２２ Ｍ分周器 ２３ 第２局部発振器 ２４ ミキサ ２５ バンドパスフィルタ ２６ 切替分周器 Reference Signs List 1 antenna 2 antenna duplexer 3 high frequency amplifier 4 band pass filter 5 mixer 6 first intermediate frequency filter 7 first intermediate frequency amplifier 8 mixer 9 second intermediate frequency filter 10 second intermediate frequency amplifier 11 first local oscillator 12 2 local oscillator 13 second local oscillator for transmission 14 modulator 15 low-pass filter 16 mixer 17 band-pass filter 18 power amplifier 21 N frequency divider 22 M frequency divider 23 second local oscillator 24 mixer 25 band-pass filter 26 switching Divider
Claims (3)
１及び第２の周波数変換手段を有するス−パーヘテロダ
イン方式の送受信機において、 前記受信系及び送信系の第２局部発振器を１つの発振器
で共用させ、 前記発振器の出力周波数をＮ分周した周波数を前記受信
系の第２の周波数変換手段に供給し、Ｍ分周した周波数
を前記送信系に供給する分周手段を設けたことを特徴と
するス−パーヘテロダイン方式の送受信機。1. A superheterodyne transceiver having a receiving system and a transmitting system and having at least first and second frequency converting means, wherein the second local oscillator of the receiving system and the transmitting system is one A frequency dividing means for supplying the frequency obtained by dividing the output frequency of the oscillator by N to the second frequency converting means of the receiving system and supplying the frequency obtained by dividing the frequency by M to the transmitting system; A superheterodyne transceiver.
分周比がＭのＭ分周器で構成され、前記発振器の出力を
Ｎ分周器を通して前記受信系の第２の周波数変換手段
に、Ｍ分周器を通して前記送信系に供給することを特徴
とする請求項１に記載のス−パーヘテロダイン方式の送
受信機。2. The frequency dividing means includes an N frequency divider having a frequency dividing ratio of N and an M frequency divider having a frequency dividing ratio of M. The superheterodyne transceiver according to claim 1, wherein the signal is supplied to the transmission system through an M frequency divider to the second frequency converter.
をＮ又はＭに切替ることができる切替分周器で構成さ
れ、前記発振器の出力周波数を該切替分周器でＮ分周し
て前記受信系の第２の周波数変換手段に、Ｍ分周して前
記送信系に供給することを特徴とするス−パーヘテロダ
イン方式の送受信機。3. The frequency dividing means comprises a switching frequency divider capable of switching a frequency dividing ratio to N or M by a switching signal, and the output frequency of the oscillator is divided by N by the switching frequency divider. And transmitting the frequency-divided signal to the second frequency converting means of the receiving system to the transmitting system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14106297A JP3252211B2 (en) | 1997-05-14 | 1997-05-14 | Superheterodyne transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14106297A JP3252211B2 (en) | 1997-05-14 | 1997-05-14 | Superheterodyne transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10322238A true JPH10322238A (en) | 1998-12-04 |
| JP3252211B2 JP3252211B2 (en) | 2002-02-04 |
Family
ID=15283371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14106297A Expired - Fee Related JP3252211B2 (en) | 1997-05-14 | 1997-05-14 | Superheterodyne transceiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3252211B2 (en) |
-
1997
- 1997-05-14 JP JP14106297A patent/JP3252211B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3252211B2 (en) | 2002-02-04 |
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