JPS6181239U - - Google Patents
Info
- Publication number
- JPS6181239U JPS6181239U JP16539684U JP16539684U JPS6181239U JP S6181239 U JPS6181239 U JP S6181239U JP 16539684 U JP16539684 U JP 16539684U JP 16539684 U JP16539684 U JP 16539684U JP S6181239 U JPS6181239 U JP S6181239U
- Authority
- JP
- Japan
- Prior art keywords
- diode
- antenna
- transistor
- frequency
- radio
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims 5
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Amplifiers (AREA)
- Transceivers (AREA)
Description
第１図は本考案を適用する無線機の構成例を示
すブロツク線図、第２図はバンドパスフイルタ７
，１１の特性図、第３図はアンテナスイツチ５の
構成例を示す回路図、第４図は高周波増幅器８の
構成例を示す回路図、第５図はトランジスタＱの
浮遊容量とダイオードＤ３のリードインダクタと
からなる並列共振回路の等価回路である。
１はＰＬＬシンセサイザ、２はＰＬＬシンセサ
イザ１からの送信搬送波を送信電力増幅器４或い
は受信部側のミキサ１０の何れかに供給する切換
スイツチ、３はマイクロホン、４は送信電力増幅
器、５はアンテナスイツチ、６はアンテナ、７，
９は第２図に示す特性を有するバンドパスフイル
タ、８は高周波増幅器である。
Fig. 1 is a block diagram showing an example of the configuration of a radio device to which the present invention is applied, and Fig. 2 shows a bandpass filter 7.
, 11, FIG. 3 is a circuit diagram showing an example of the configuration of the antenna switch 5, FIG. 4 is a circuit diagram showing an example of the configuration of the high frequency amplifier 8, and FIG. 5 is a diagram showing the stray capacitance of the transistor Q and the lead of the diode D3. This is an equivalent circuit of a parallel resonant circuit consisting of an inductor. 1 is a PLL synthesizer, 2 is a changeover switch that supplies the transmission carrier wave from the PLL synthesizer 1 to either a transmission power amplifier 4 or a mixer 10 on the receiving side, 3 is a microphone, 4 is a transmission power amplifier, 5 is an antenna switch, 6 is the antenna, 7,
9 is a bandpass filter having the characteristics shown in FIG. 2, and 8 is a high frequency amplifier.
Claims (1)
るか或いは前記アンテナで受信した受信信号を少
なくとも使用周波数帯域のみを通過させるバンド
パスフイルタと高周波増幅回路とを介してミキサ
に供給するかを切換えるアンテナスイツチと、Ｐ
ＬＬシンセサイザからの局部発振信号を前記ミキ
サに供給するか或いは前記送信系に供給するかを
切換える切換スイツチとを備えた無線機に於いて
、前記高周波増幅回路は電力増幅用のトランジス
タと該トランジスタのベース−エミツタ間に逆方
向に接続されたトランジスタ保護用のダイオード
とを備え、且つ前記ダイオードのリードインダク
タンスと前記トランジスタのベース−エミツタ間
の浮遊容量とからなる並列共振回路の共振周波数
が前記バンドパスフイルタの通過帯域の上側とな
るように、前記ダイオードのリードインダクタン
スを設定したことを特徴とする無線機の高周波増
幅回路。 (2) 前記ダイオードはチツプダイオードからな
ることを特徴とする実用新案登録請求の範囲第１
項記載の無線機の高周波増幅回路。[Claims for Utility Model Registration] (1) A transmission signal from a transmission system is supplied to an antenna, or a reception signal received by the antenna is passed through a band-pass filter and a high-frequency amplification circuit that pass at least only the frequency band used. An antenna switch that switches whether or not to supply the antenna to the mixer;
In a radio equipped with a changeover switch for switching between supplying a local oscillation signal from a LL synthesizer to the mixer or to the transmission system, the high-frequency amplification circuit includes a power amplification transistor and a power amplification transistor. and a transistor protection diode connected in the opposite direction between the base and the emitter, and the resonant frequency of the parallel resonant circuit consisting of the lead inductance of the diode and the stray capacitance between the base and the emitter of the transistor is equal to the bandpass. A high frequency amplifier circuit for a radio device, characterized in that the lead inductance of the diode is set so as to be above a passband of a filter. (2) Claim 1 of the utility model registration characterized in that the diode is a chip diode.
A high frequency amplification circuit for a radio set as described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16539684U JPH0129875Y2 (en) | 1984-10-31 | 1984-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16539684U JPH0129875Y2 (en) | 1984-10-31 | 1984-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6181239U true JPS6181239U (en) | 1986-05-29 |
| JPH0129875Y2 JPH0129875Y2 (en) | 1989-09-12 |
Family
ID=30723248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16539684U Expired JPH0129875Y2 (en) | 1984-10-31 | 1984-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0129875Y2 (en) |
-
1984
- 1984-10-31 JP JP16539684U patent/JPH0129875Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0129875Y2 (en) | 1989-09-12 |
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