JPH09153826A - Receiving circuit - Google Patents
Receiving circuitInfo
- Publication number
- JPH09153826A JPH09153826A JP7310895A JP31089595A JPH09153826A JP H09153826 A JPH09153826 A JP H09153826A JP 7310895 A JP7310895 A JP 7310895A JP 31089595 A JP31089595 A JP 31089595A JP H09153826 A JPH09153826 A JP H09153826A
- Authority
- JP
- Japan
- Prior art keywords
- receiving circuit
- input
- output
- signal
- wave suppressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Noise Elimination (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Radio Transmission System (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、携帯電話機のよう
な移動体通信機器などの無線受信装置で用いられる受信
回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver circuit used in a wireless receiver such as a mobile communication device such as a mobile phone.
【０００２】[0002]
【従来の技術】一般に用いられている携帯電話機にあっ
ては、現在800ＭHz帯と、1.5ＧHz帯等の周波数帯域で運
用されているが、それぞれの帯域毎またはシステム毎に
専用の電話機になっており、受信回路も個々に設計され
ているのが現状である。2. Description of the Related Art Generally used mobile phones are currently operated in frequency bands such as 800 MHz band and 1.5 GHz band, but they are dedicated phones for each band or system. At present, the receiving circuit is also designed individually.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記の
ような運用形態においては、800ＭHz帯と1.5ＧHz帯の両
方の周波数帯を受信したい場合には、２台の電話機が必
要となり、利用者にとっては大きな負担となる。また、
両方の周波数帯を受信可能なように、それぞれの受信回
路をそのまま組み合わせた電話機にすると、回路規模が
大きくなり、装置の大きさの面でも携帯性を考えるとそ
の不利は免れない。これは、例に挙げた上記周波数帯以
外の複数の周波数帯を受信する場合でもまた同様であ
る。However, in the above-mentioned operation mode, two telephones are required to receive both frequency bands of 800 MHz band and 1.5 GHz band, which is necessary for the user. It will be a heavy burden. Also,
If a telephone set in which the respective receiving circuits are combined as it is so as to be able to receive both frequency bands is used, the circuit scale becomes large, and the disadvantage is inevitable from the viewpoint of portability in terms of the size of the device. This is the same also in the case of receiving a plurality of frequency bands other than the above-described frequency bands.
【０００４】本発明はこのような従来の問題点を解決す
るものであり、不要波抑圧フィルタに帯域選択性を持た
せ、簡単な構成で小型化可能な受信回路を提供すること
を目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a receiver circuit which has a band selectability for an unnecessary wave suppression filter and which can be downsized with a simple structure. .
【０００５】[0005]
【課題を解決するための手段】本発明の受信回路におい
ては、複数の受信周波数帯域に対応した各帯域専用の不
要波抑圧手段及び増幅器を設け、その出力を各受信周波
数帯域共通の信号復調ラインに入力する回路構成とした
ものである。In the receiving circuit of the present invention, unnecessary wave suppressing means and amplifier dedicated to each band corresponding to a plurality of receiving frequency bands are provided, and the output thereof is a signal demodulation line common to each receiving frequency band. It has a circuit configuration for input to.
【０００６】この本発明によれば、各受信周波数帯域毎
に設けられるのは不要波抑圧手段及び増幅器だけであ
り、これにより不要波に対する所要減衰量を確保し、そ
の他の部分は各受信周波数帯共通の回路構成としたもの
であるから、構成が簡素化され小型化可能な受信回路が
実現する。According to the present invention, only the unnecessary wave suppressing means and the amplifier are provided for each reception frequency band, whereby the required attenuation amount for the unnecessary wave is secured, and the other parts are provided for each reception frequency band. Since the circuit configuration is common, the configuration is simplified and a receiver circuit that can be downsized is realized.
【０００７】[0007]
【発明の実施の形態】以下、本発明の各実施形態につい
て図面を参照しつつ説明する。図１は本発明の第１実施
形態における受信回路の構成を示すブロック図である。
図中、11は高周波入力端子、12は第１の受信回路切換手
段、13は第１の切換信号入力端子、14は第１の不要波抑
圧手段、15は第２の不要波抑圧手段、16は第１の増幅
器、17は第２の切換信号入力端子、18は第２の増幅器、
19は第３の切換信号入力端子、20は局部発振手段、21は
ミキサ、22は中間周波出力端子である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a receiving circuit according to the first embodiment of the present invention.
In the figure, 11 is a high frequency input terminal, 12 is a first receiving circuit switching means, 13 is a first switching signal input terminal, 14 is a first unwanted wave suppressing means, 15 is a second unwanted wave suppressing means, 16 Is a first amplifier, 17 is a second switching signal input terminal, 18 is a second amplifier,
Reference numeral 19 is a third switching signal input terminal, 20 is a local oscillator, 21 is a mixer, and 22 is an intermediate frequency output terminal.
【０００８】次にその動作を説明する。まず、高周波入
力端子11から入力された受信信号は、第１の切換信号入
力端子13により受信すべき周波数帯域に応じて入力され
る制御信号に対応する第１の受信回路切換手段12の動作
により、相異なる単一の通過帯域を有する第１の不要波
抑圧手段14または第２の不要波抑圧手段15に入力され
る。この第１の受信回路切換手段12が第１の不要波抑圧
手段14の回路を選択している場合には、第１の増幅器16
が動作状態となるよう第２の切換信号入力端子17より制
御し、第２の増幅器18が非動作状態となるように第３の
切換信号入力端子19より制御を行う。Next, the operation will be described. First, the reception signal input from the high frequency input terminal 11 is operated by the first receiving circuit switching means 12 corresponding to the control signal input according to the frequency band to be received by the first switching signal input terminal 13. , Is input to the first unnecessary wave suppressing means 14 or the second unnecessary wave suppressing means 15 having different single pass bands. When the first receiving circuit switching means 12 selects the circuit of the first unnecessary wave suppressing means 14, the first amplifier 16
Is controlled by the second switching signal input terminal 17 so that the second amplifier 18 is in the operating state, and is controlled by the third switching signal input terminal 19 so that the second amplifier 18 is in the non-operating state.
【０００９】これと反対に第１の受信回路切換手段12が
第２の不要波抑圧手段15の回路を選択している場合に
は、第２の増幅器18が動作状態となるように第３の切換
信号入力端子19より制御し、第１の増幅器16が非動作状
態となるよう第２の切換信号入力端子17より制御を行
う。このようにして、受信信号は、受信すべき周波数帯
域に応じて不要波抑圧及び増幅された後、各周波数帯域
共通の信号復調系統へ導かれる。即ち、この信号は各帯
域共通に使用可能な広帯域または２周波数帯域対応のミ
キサ21に入力され、このミキサ21は局部発振手段20の出
力をローカル信号として、受信信号を中間周波数に変換
し、中間周波出力端子22に出力する。以後必要に応じて
ダブルヘテロダイン等の信号処理がなされ、更に検波さ
れて復調されることになる。On the contrary, when the first receiving circuit switching means 12 selects the circuit of the second unwanted wave suppressing means 15, the third amplifier 18 operates so that the second amplifier 18 is in the operating state. Control is performed from the switching signal input terminal 19, and control is performed from the second switching signal input terminal 17 so that the first amplifier 16 becomes inoperative. In this way, the received signal is guided to the signal demodulation system common to each frequency band after the unnecessary wave is suppressed and amplified according to the frequency band to be received. That is, this signal is input to a wide band or two frequency band compatible mixer 21 that can be used commonly for each band, and this mixer 21 converts the received signal into an intermediate frequency using the output of the local oscillating means 20 as a local signal, Output to the frequency output terminal 22. Thereafter, signal processing such as double heterodyne is performed as necessary, and further detected and demodulated.
【００１０】このように本実施形態によれば、少なくと
も２つの周波数帯域を受信する場合においても、各周波
数帯域毎に不要波抑圧手段と増幅器のみをこの帯域専用
に使用するだけでよく、その他の部分は共通化できる。
また、各周波数帯域毎に不要波抑圧手段と増幅器をこの
帯域に合わせて最適設計でき、受信感度，スプリアス感
度特性等が劣化することなく、良好な受信特性が実現で
きる。As described above, according to the present embodiment, even when receiving at least two frequency bands, it is sufficient to use only the unnecessary wave suppression means and the amplifier for each frequency band, and to use only the unnecessary band. Parts can be shared.
Further, the unnecessary wave suppressing means and the amplifier can be optimally designed for each frequency band in accordance with this band, and good reception characteristics can be realized without deterioration of reception sensitivity, spurious sensitivity characteristics and the like.
【００１１】次に本発明の第２実施形態について説明す
る。図２は本発明の第２実施形態における受信回路の構
成を示すブロック図であり、前記第１実施形態のものと
同一の部分については同一の符号を用いてある。この第
２実施形態のものと前記第１実施形態のものとの相違点
は、受信すべき周波数帯域に応じて第１の増幅器16また
は第２の増幅器18の出力を切り換える手段、即ち、第４
の切換信号入力端子23より制御される第２の受信回路切
換手段24を設けた点にあり、その他の構成は同一であ
る。Next, a second embodiment of the present invention will be described. FIG. 2 is a block diagram showing the configuration of the receiving circuit according to the second embodiment of the present invention, and the same parts as those in the first embodiment are designated by the same reference numerals. The difference between the second embodiment and the first embodiment is that means for switching the output of the first amplifier 16 or the second amplifier 18 according to the frequency band to be received, that is, the fourth embodiment.
The second receiving circuit switching means 24 controlled by the switching signal input terminal 23 is provided, and other configurations are the same.
【００１２】このように構成することにより第１の受信
回路切換手段12と第２の受信回路切換手段24とは同一の
不要波抑圧手段及び増幅器側を選択するように連動して
切換制御されるので、選択されていない側の回路と高周
波的に良好なアイソレーション特性を得ることができ
る。なお、第１実施形態と同様、選択されていない側の
不要波抑圧手段及び増幅器は非動作状態にすることも可
能である。With this configuration, the first receiving circuit switching means 12 and the second receiving circuit switching means 24 are interlocked and controlled so as to select the same unnecessary wave suppressing means and amplifier side. Therefore, it is possible to obtain good isolation characteristics in terms of high frequency with the circuit on the non-selected side. Note that, as in the first embodiment, the unnecessary wave suppressing means and the amplifier on the non-selected side can be made inoperative.
【００１３】このように本実施形態によれば、前記第１
実施形態と同様、各周波数帯域毎に必要とするのは不要
波抑圧手段と増幅器のみであり、その他の部分は共通化
できるは勿論、受信すべき各周波数帯域毎に用意される
不要波抑圧手段と増幅器の相互影響を軽減し、良好な受
信特性を得ることができる。As described above, according to this embodiment, the first
Similar to the embodiment, only the unnecessary wave suppressing means and the amplifier are required for each frequency band, and the other parts can be made common, and needless to say, the unnecessary wave suppressing means prepared for each frequency band to be received. It is possible to reduce the mutual influence of the amplifier and the amplifier and obtain good reception characteristics.
【００１４】次に本発明の第３実施形態について説明す
る。図３は本発明の第３実施形態における受信回路の構
成を示すブロック図であり、前記第１及び第２実施形態
のものと同一若しくは均等の部分については同一の符号
を用いてある。この第３実施形態においては、アンテナ
を２系統設け、受信電解強度の大きい方のアンテナを選
択するダイバーシチ受信回路を入力側に設けたものであ
り、図中、25は第１のアンテナ端子、26は第２のアンテ
ナ端子、27はアンテナ及び受信回路切換手段、28はアン
テナ端子切換信号入力端子である。この２入力２出力の
アンテナ及び受信回路切換手段27は第１，第２のアンテ
ナ端子25，26の切換と、図１，図２における第１の受信
回路切換手段12における受信周波数帯域の切換とを行う
機能を有しており、これが前記第１の受信回路切換手段
12の代わりに設けられている点が前記第１及び第２実施
形態のものと相違する点であり、その他の構成は第２実
施形態のものと同一である。このように構成することに
より、前記第１，第２実施形態と同様、各周波数帯域毎
に必要とするのは不要波抑圧手段と増幅器のみであり、
その他の部分は共通化できるは勿論、２系統のアンテナ
から受信電解強度の大きいアンテナを選択することによ
り、フェージング等の条件下においても良好な受信特性
を得ることができる。Next, a third embodiment of the present invention will be described. FIG. 3 is a block diagram showing a configuration of a receiving circuit according to the third embodiment of the present invention, and the same reference numerals are used for the same or equivalent portions as those of the first and second embodiments. In the third embodiment, two systems of antennas are provided, and a diversity receiving circuit for selecting the antenna with the higher received electrolytic strength is provided on the input side. In the figure, 25 is the first antenna terminal, and 26 is the first antenna terminal. Is a second antenna terminal, 27 is an antenna and receiving circuit switching means, and 28 is an antenna terminal switching signal input terminal. The 2-input / 2-output antenna and receiving circuit switching means 27 switches the first and second antenna terminals 25 and 26, and switches the receiving frequency band in the first receiving circuit switching means 12 in FIGS. Has the function of performing the above, which is the first receiving circuit switching means.
12 is provided in place of 12 and is different from that of the first and second embodiments, and other configurations are the same as those of the second embodiment. With this configuration, like the first and second embodiments, only the unnecessary wave suppressing means and the amplifier are required for each frequency band,
Other parts can be made common, and good reception characteristics can be obtained even under conditions such as fading by selecting an antenna having a large reception electrolytic strength from the two systems of antennas.
【００１５】[0015]
【発明の効果】以上のように本発明は、各受信周波数帯
域毎に設けられるのは不要波抑圧手段及び増幅器だけで
あり、これにより不要波に対する所要減衰量が確保さ
れ、その他の部分は各受信周波数帯共通の回路構成であ
るから、構成が簡素化されて受信回路の小型化が可能と
なり、かつ良好な受信特性を得ることができるという有
利な効果が得られる。As described above, according to the present invention, only the unnecessary wave suppressing means and the amplifier are provided for each reception frequency band, whereby the required attenuation amount for the unnecessary wave is secured, and the other portions are Since the circuit configuration is common to the reception frequency band, the configuration is simplified, the reception circuit can be downsized, and good reception characteristics can be obtained.
【図１】本発明の受信回路の第１実施形態の構成を示す
ブロック図である。FIG. 1 is a block diagram showing a configuration of a first embodiment of a receiving circuit of the present invention.
【図２】本発明の受信回路の第２実施形態の構成を示す
ブロック図である。FIG. 2 is a block diagram showing a configuration of a second embodiment of a receiving circuit of the present invention.
【図３】本発明の受信回路の第３実施形態の構成を示す
ブロック図である。FIG. 3 is a block diagram showing a configuration of a third embodiment of a receiving circuit of the present invention.
11…高周波入力端子、 12…第１の受信回路切換手段、
13…第１の切換信号入力端子、 14…第１の不要波抑
圧手段、 15…第２の不要波抑圧手段、 16…第１の増
幅器、 17…第２の切換信号入力端子、 18…第２の増
幅器、 19…第３の切換信号入力端子、 20…局部発振
手段、 21…ミキサ、 22…中間周波出力端子、 23…
第４の切換信号入力端子、 24…第２の受信回路切換手
段、 25…第１のアンテナ端子、 26…第２のアンテナ
端子、 27…アンテナ及び受信回路切換手段、 28…ア
ンテナ端子切換信号入力端子。11 ... High frequency input terminal, 12 ... First receiving circuit switching means,
13 ... First switching signal input terminal, 14 ... First unwanted wave suppressing means, 15 ... Second unwanted wave suppressing means, 16 ... First amplifier, 17 ... Second switching signal input terminal, 18 ... 2 amplifier, 19 ... 3rd switching signal input terminal, 20 ... Local oscillating means, 21 ... Mixer, 22 ... Intermediate frequency output terminal, 23 ...
Fourth switching signal input terminal, 24 ... Second receiving circuit switching means, 25 ... First antenna terminal, 26 ... Second antenna terminal, 27 ... Antenna and receiving circuit switching means, 28 ... Antenna terminal switching signal input Terminal.
Claims (4)
専用の不要波抑圧手段及び増幅器を設け、その出力を各
受信周波数帯域共通の信号復調ラインに入力することを
特徴とする受信回路。1. A receiving circuit comprising: an unnecessary wave suppressing means and an amplifier dedicated to each band corresponding to a plurality of receiving frequency bands, and outputting the output thereof to a signal demodulation line common to each receiving frequency band.
号を、受信すべき周波数帯域に応じてその信号通過経路
を切り換えるための第１の受信回路切換手段と、前記第
１の受信回路切換手段の出力を入力とし単一の周波数帯
域のみを通過帯域とする第１の不要波抑圧手段と、前記
第１の受信回路切換手段の他の出力を入力とし第１の不
要波抑圧手段とは別の通過帯域を有する第２の不要波抑
圧手段と、前記第１及び第２の不要波抑圧手段の出力の
それぞれを入力とし、これを増幅する第１及び第２の増
幅器と、前記第１または第２の増幅器の出力を入力とし
局部発振手段の出力をローカル信号として、中間周波数
を発生させるミキサとを備えたことを特徴とする受信回
路。2. A first receiving circuit switching means for switching a signal passage path of a high frequency signal input from a high frequency input terminal according to a frequency band to be received, and the first receiving circuit switching means. Different from the first unnecessary wave suppressing means having the output as an input and having only a single frequency band as a pass band, and the other output of the first receiving circuit switching means as an input. Second unwanted wave suppressing means having a pass band, and first and second amplifiers for amplifying the outputs of the first and second unwanted wave suppressing means, respectively, and the first or second And a mixer for generating an intermediate frequency by using the output of the amplifier 2 as an input and the output of the local oscillating means as a local signal.
号を、受信すべき周波数帯域に応じてその信号通過経路
を切り換えるための第１の受信回路切換手段と、前記第
１の受信回路切換手段の出力を入力とし単一の周波数帯
域のみを通過帯域とする第１の不要波抑圧手段と、前記
第１の受信回路切換手段の他の出力を入力とし第１の不
要波抑圧手段とは別の通過帯域を有する第２の不要波抑
圧手段と、前記第１及び第２の不要波抑圧手段の出力の
それぞれを入力としこれを増幅する第１及び第２の増幅
器と、前記第１及び第２の増幅器の出力を入力とし前記
第１の受信回路切換手段と連動してこれと同一の信号通
過経路を選択する第２の受信回路切換手段と、前記第２
の受信回路切換手段の出力を入力とし局部発振手段の出
力をローカル信号として、中間周波数を発生させるミキ
サとを備えたことを特徴とする受信回路。3. A first receiving circuit switching means for switching a signal passing path of a high frequency signal input from a high frequency input terminal according to a frequency band to be received, and the first receiving circuit switching means. Different from the first unnecessary wave suppressing means having the output as an input and having only a single frequency band as a pass band, and the other output of the first receiving circuit switching means as an input. Second unwanted wave suppressing means having a pass band, first and second amplifiers which respectively take the outputs of the first and second unwanted wave suppressing means as inputs, and amplify the same, and the first and second Second receiving circuit switching means which receives the output of the amplifier of FIG. 2 as an input and selects the same signal passing path as the first receiving circuit switching means in cooperation with the first receiving circuit switching means, and the second receiving circuit switching means.
And a mixer for generating an intermediate frequency using the output of the receiving circuit switching means as an input and the output of the local oscillating means as a local signal.
力された高周波信号に基づきダイバーシチ受信する入力
回路を備え、その出力を第１の受信回路切換手段に入力
するようにしたことを特徴とする請求項２または請求項
３記載の受信回路。4. An input circuit for performing diversity reception based on a high frequency signal input from the first and second antenna input terminals, the output of which is input to the first receiving circuit switching means. The receiving circuit according to claim 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310895A JPH09153826A (en) | 1995-11-29 | 1995-11-29 | Receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7310895A JPH09153826A (en) | 1995-11-29 | 1995-11-29 | Receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09153826A true JPH09153826A (en) | 1997-06-10 |
Family
ID=18010681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7310895A Pending JPH09153826A (en) | 1995-11-29 | 1995-11-29 | Receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09153826A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014017597A (en) * | 2012-07-06 | 2014-01-30 | Toshiba Corp | Antenna device |
| JP2016092826A (en) * | 2014-10-31 | 2016-05-23 | スカイワークス ソリューションズ, インコーポレイテッドSkyworks Solutions, Inc. | Diversity receiver front end including variable gain amplifier |
| US9667324B2 (en) | 2014-10-31 | 2017-05-30 | Skyworks Solutions, Inc. | Diversity receiver front end system with amplifier phase compensation |
| US9838056B2 (en) | 2015-05-28 | 2017-12-05 | Skyworks Solutions, Inc. | Integrous signal combiner |
| US10050694B2 (en) | 2014-10-31 | 2018-08-14 | Skyworks Solution, Inc. | Diversity receiver front end system with post-amplifier filters |
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1995
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014017597A (en) * | 2012-07-06 | 2014-01-30 | Toshiba Corp | Antenna device |
| JP2016092826A (en) * | 2014-10-31 | 2016-05-23 | スカイワークス ソリューションズ, インコーポレイテッドSkyworks Solutions, Inc. | Diversity receiver front end including variable gain amplifier |
| US9667324B2 (en) | 2014-10-31 | 2017-05-30 | Skyworks Solutions, Inc. | Diversity receiver front end system with amplifier phase compensation |
| US9893752B2 (en) | 2014-10-31 | 2018-02-13 | Skyworks Solutions, Inc. | Diversity receiver front end system with variable-gain amplifiers |
| US10050694B2 (en) | 2014-10-31 | 2018-08-14 | Skyworks Solution, Inc. | Diversity receiver front end system with post-amplifier filters |
| US10205490B2 (en) | 2014-10-31 | 2019-02-12 | Skyworks Solutions, Inc. | Diversity receiver front end system with tunable output matching circuit |
| US9838056B2 (en) | 2015-05-28 | 2017-12-05 | Skyworks Solutions, Inc. | Integrous signal combiner |
| US10009054B2 (en) | 2015-05-28 | 2018-06-26 | Skyworks Solutions, Inc. | Impedance matching integrous signal combiner |
| US10447322B2 (en) | 2015-05-28 | 2019-10-15 | Skyworks Solutions, Inc. | Integrous signal combiner |
| US11082077B2 (en) | 2015-05-28 | 2021-08-03 | Skyworks Solutions, Inc. | Integrous signal combiner |
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