JPH0724829Y2 - Mobile radio equipment - Google Patents

Mobile radio equipment

Info

Publication number
JPH0724829Y2
JPH0724829Y2 JP1989092352U JP9235289U JPH0724829Y2 JP H0724829 Y2 JPH0724829 Y2 JP H0724829Y2 JP 1989092352 U JP1989092352 U JP 1989092352U JP 9235289 U JP9235289 U JP 9235289U JP H0724829 Y2 JPH0724829 Y2 JP H0724829Y2
Authority
JP
Japan
Prior art keywords
circuit
power
amplifying
mobile radio
transmission
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.)
Expired - Lifetime
Application number
JP1989092352U
Other languages
Japanese (ja)
Other versions
JPH0332844U (en
Inventor
拓夫 高井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Tottori Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tottori Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tottori Sanyo Electric Co Ltd
Priority to JP1989092352U priority Critical patent/JPH0724829Y2/en
Publication of JPH0332844U publication Critical patent/JPH0332844U/ja
Application granted granted Critical
Publication of JPH0724829Y2 publication Critical patent/JPH0724829Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Amplifiers (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

【考案の詳細な説明】 (イ)産業上の利用分野 本考案は、セルラー方式自動車電話や携帯電話等の移動
無線装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a mobile wireless device such as a cellular car phone or a mobile phone.

(ロ)従来の技術 従来、送信用の高周波電力を増幅する電力増幅回路の増
幅素子としては、所謂バイポーラタイプのものが使用さ
れていた。ところが、バイポーラタイプのものは、例え
ば、特開昭63-202137号公報に開示されているように温
度補償をなす必要があった。而して、最近は上記の点に
鑑み増幅素子として温度補償の必要のないガリウム砒素
を使用するようになっている。
(B) Conventional Technology Conventionally, a so-called bipolar type amplification element has been used as an amplification element of a power amplification circuit for amplifying high frequency power for transmission. However, the bipolar type requires temperature compensation as disclosed in, for example, JP-A-63-202137. In view of the above points, recently, gallium arsenide, which does not require temperature compensation, has been used as an amplifying element.

ところで、アメリカ合衆国におけるセルラー方式におい
ては、送信チャンネルを変更する間、所定レベルの電波
が放射されないようにすることが定められており、この
間は電力増幅回路を不動作にする必要があり、一般にプ
ラス電源を遮断するようにしていた。
By the way, in the cellular system in the United States, it is stipulated that radio waves of a predetermined level should not be radiated while the transmission channel is changed, and during this period, it is necessary to disable the power amplifier circuit, and in general, a positive power supply is required. I was trying to shut off.

(ハ)考案が解決しようとする課題 しかし、増幅素子としてガリウム砒素を使用した電力増
幅回路の特性としては、マイナスバイアスが印加されて
いれば、プラス電源が印加されていなくとも入力信号を
少許の減衰量で出力するようになっている。従って、上
記構成によっては送信チャンネルの変更の間、所定レベ
ル以上の電波が放射される恐れがあった。
(C) Problems to be solved by the device However, as a characteristic of a power amplifier circuit using gallium arsenide as an amplifier element, if a negative bias is applied, an input signal can be small even if a positive power supply is not applied. It is designed to output with the amount of attenuation. Therefore, depending on the above configuration, there is a possibility that radio waves of a predetermined level or higher are radiated during the change of the transmission channel.

(ニ)課題を解決するための手段 本考案の移動無線装置は、増幅素子としてガリウム砒素
を使用した電力増幅回路のプラス及びマイナス電源のス
イッチング素子を送信用のチャンネル変更時オフ状態に
設定するものである。
(D) Means for Solving the Problems The mobile radio device of the present invention sets the switching elements of the positive and negative power supplies of the power amplification circuit using gallium arsenide as the amplification element to the off state when changing the channel for transmission. Is.

(ホ)作用 本考案は、上記のように構成したものであり、送信用の
チャンネルの変更時、所定レベル以上の不要電波の放射
を防止することができる。
(E) Operation The present invention is configured as described above and can prevent the emission of unnecessary radio waves above a predetermined level when changing the transmission channel.

(ヘ)実施例 本考案の実施例をセルラー方式の自動車電話を例に説明
する。
(F) Embodiment An embodiment of the present invention will be described by taking a cellular phone as an example.

(1)はアンテナ(2)に接続されたアンテナ共用器、
(3)は前記アンテナ共用器(1)に接続された受信回
路で、アンテナ共用器(1)からの高周波信号を復調す
る。(4)はデータ受信回路で、前記受信回路(3)の
復調出力より無線基地局から送信されるコントロールメ
ッセージを読み込み、ワード同期等の所定の処理を行
う。(5)は前記アンテナ共用器(1)に高周波信号を
供給する送信回路である。この送信回路(5)は、PLL
回路(6)、増幅素子としてガリウム砒素を使用した電
力増幅回路(7)、前記PLL回路(6)の出力レベルと
電力増幅回路(7)の入力レベル合わせるためのバッフ
ア増幅回路(8)及び前記電力増幅回路(7)のプラ
ス、マイナス電源端子の各々に接続されたトランジスタ
(9)(9)から構成されている。(10)はデータ送信
回路で、データメッセージをマンチェスタ符号形式に符
号化し、無線基地局に伝送するように前記PLL回路
(6)に接続されている。(11)は音声処理回路で、前
記受信回路(3)からの復調出力に基づきスピーカ(図
示せず)を駆動し、そしてマイク(図示せず)の出力を
前記PLL回路(6)に与える。尚、PLL回路(6)は、デ
ータ送信回路(10)及び音声処理回路(11)の出力信号
を高周波の搬送波によりFM変調し、電力増幅回路(7)
に与えることになる。(12)はマイクロプロセッサから
なる制御回路で、移動無線装置内の各装置を制御するた
めのデータメッセージを前記データ受信回路(4)及び
データ送信回路(10)を介して送受するものである。
(1) is an antenna duplexer connected to the antenna (2),
(3) is a receiving circuit connected to the antenna duplexer (1) and demodulates a high frequency signal from the antenna duplexer (1). (4) is a data receiving circuit, which reads a control message transmitted from the radio base station from the demodulated output of the receiving circuit (3) and performs a predetermined process such as word synchronization. (5) is a transmission circuit for supplying a high frequency signal to the antenna duplexer (1). This transmission circuit (5) is a PLL
A circuit (6), a power amplifier circuit (7) using gallium arsenide as an amplifier element, a buffer amplifier circuit (8) for adjusting the output level of the PLL circuit (6) and the input level of the power amplifier circuit (7), and The power amplifier circuit (7) includes transistors (9) and (9) connected to the positive and negative power supply terminals, respectively. Reference numeral (10) is a data transmission circuit, which is connected to the PLL circuit (6) so as to encode the data message in the Manchester code format and transmit it to the radio base station. Reference numeral (11) is a voice processing circuit, which drives a speaker (not shown) based on the demodulated output from the receiving circuit (3) and gives an output of a microphone (not shown) to the PLL circuit (6). The PLL circuit (6) FM-modulates the output signals of the data transmission circuit (10) and the audio processing circuit (11) with a high-frequency carrier wave, and a power amplification circuit (7).
Will be given to. (12) is a control circuit composed of a microprocessor for transmitting and receiving a data message for controlling each device in the mobile radio device via the data receiving circuit (4) and the data transmitting circuit (10).

而して、前記制御回路(12)は、通話中に無線基地局か
ら例えばボイスチャンネルの変更メッセージが送信され
た場合、指定されたチャンネルに変更するようPLL回路
(6)に分周比データを与える。そして、チャンネルが
変更される間、バッフア増幅回路(8)を不動作にし、
且つ、各々のトランジスタ(9)(9)をオフ状態に設
定し、電力増幅回路(7)のプラス及びマイナス電源端
子への電源の供給を遮断する。これにより、電力増幅回
路(7)における減衰量が非常に大きくなり、このチャ
ンネル変更の間、所定レベル以上の不要電波が放射され
るのを防止することができる。
Then, the control circuit (12) sends the frequency division ratio data to the PLL circuit (6) so as to change to the designated channel when, for example, a voice channel change message is transmitted from the wireless base station during a call. give. Then, while the channel is changed, the buffer amplifier circuit (8) is disabled,
In addition, each transistor (9) (9) is set to the off state, and the power supply to the plus and minus power supply terminals of the power amplification circuit (7) is cut off. As a result, the amount of attenuation in the power amplifier circuit (7) becomes very large, and it is possible to prevent unnecessary radio waves above a predetermined level from being emitted during this channel change.

(ヘ)考案の効果 本考案の移動無線装置は、増幅素子としてガリウム砒素
を使用した電力増幅回路のプラス及びマイナス電源のス
イッチング素子を送信用のチャンネル変更時オフ状態に
設定するものであり、送信用のチャンネルの変更時、所
定レベル以上の不要電波の放射を簡単な構成により防止
することができる。
(F) Effect of the Invention The mobile radio device of the present invention sets the positive and negative power supply switching elements of the power amplification circuit using gallium arsenide as an amplification element to the off state when changing the channel for transmission. When changing the channel of trust, it is possible to prevent the emission of unnecessary radio waves above a predetermined level with a simple configuration.

【図面の簡単な説明】[Brief description of drawings]

図は、本考案の移動無線装置のブロック図である。 (7)……電力増幅回路、(9)(9)……トランジス
タ、(12)……制御回路
FIG. 1 is a block diagram of a mobile wireless device of the present invention. (7) ... Power amplification circuit, (9) (9) ... Transistor, (12) ... Control circuit

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】送信用の高周波電力を増幅する電力増幅回
路の増幅素子としてガリウム砒素を使用するものにおい
て、前記電力増幅回路のプラス電源、マイナス電源の供
給を制御する2つのスイッチング素子と、前記各々のス
イッチング素子を制御し前記電力増幅回路の動作状態を
設定する制御回路とを具備し、前記制御回路は、送信チ
ャンネルの変更時、前記電力増幅回路のプラス及びマイ
ナス電源のスイッチング素子をオフ状態に設定すること
を特徴とする移動無線装置。
1. In a device using gallium arsenide as an amplifying element of a power amplifying circuit for amplifying high frequency power for transmission, two switching elements for controlling supply of a positive power source and a negative power source of the power amplifying circuit; A control circuit for controlling each switching element to set the operating state of the power amplification circuit, wherein the control circuit turns off the switching elements of the positive and negative power supplies of the power amplification circuit when the transmission channel is changed. A mobile radio device characterized by being set to.
JP1989092352U 1989-08-04 1989-08-04 Mobile radio equipment Expired - Lifetime JPH0724829Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989092352U JPH0724829Y2 (en) 1989-08-04 1989-08-04 Mobile radio equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989092352U JPH0724829Y2 (en) 1989-08-04 1989-08-04 Mobile radio equipment

Publications (2)

Publication Number Publication Date
JPH0332844U JPH0332844U (en) 1991-03-29
JPH0724829Y2 true JPH0724829Y2 (en) 1995-06-05

Family

ID=31641788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989092352U Expired - Lifetime JPH0724829Y2 (en) 1989-08-04 1989-08-04 Mobile radio equipment

Country Status (1)

Country Link
JP (1) JPH0724829Y2 (en)

Also Published As

Publication number Publication date
JPH0332844U (en) 1991-03-29

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