JPS635626A - Radio communication equipment - Google Patents
Radio communication equipmentInfo
- Publication number
- JPS635626A JPS635626A JP14844986A JP14844986A JPS635626A JP S635626 A JPS635626 A JP S635626A JP 14844986 A JP14844986 A JP 14844986A JP 14844986 A JP14844986 A JP 14844986A JP S635626 A JPS635626 A JP S635626A
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- circuit
- crystal
- switching
- capacitance
- 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
- 230000010355 oscillation Effects 0.000 claims abstract description 42
- 239000013078 crystal Substances 0.000 claims abstract description 40
- 239000003990 capacitor Substances 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は、家庭や事務所、あるいは倉庫内において使＃
ｉされる無線データ伝送装置に用いられる双方向同時通
信型の無線通信装置に関するものである。[Detailed Description of the Invention] [Technical Field] The present invention can be used at home, in an office, or in a warehouse.
The present invention relates to a two-way simultaneous communication type wireless communication device used in a wireless data transmission device.
［背景技術１
近年、ニューメディア関係の情報伝達機器の発達は目覚
ましく、家庭や事務所、あるいは倉庫内などにおいては
、簡易な呼び出し、あるいは連絡用として音声やデータ
を伝達する無線通信装置が利用されている。このような
Ｓ線通信装置では複数同時使用を可能とするために最低
２〜３チヤンネルを必要とする。これらの無線通信にお
いては、他の無線システムや、オーディオ機器などの電
化製品、あるいは他の設備機器などの輻射ノイズによっ
て電波妨害を受けることが多々あった。そこで、従来に
おいては、そのチャンネル相当数の水晶振動子の切換、
あるいはＰＬＬシンセサイザー方式のＩＣを用いて対応
していた。上記水晶振動子の切換型の無線通話装置につ
いて、第４図に従って説明する。この無線通信装置は、
送受信用にアンテナ１を兼用したものである。送信回路
部は、送信データからローパスフィルタ２にて高域の信
号を低減し、キャリア信号を発生する水晶振動子を用い
た水晶発振回路９出力をローパスフィルタ２出力にて変
調する変調回路３と、この変調回路３出力をてい倍回路
４にて所定の送信周波数にてい倍し、さらにこのてい倍
回路４出力からパンドバスフィルタ５にて不要なスプリ
アスを削減して送信を行っている。また、受信回路部は
、ダブルスーパヘテロゲイン方式の回路であり、希望周
波数の受信信号を通過するバンドパスフィルタ６、高周
波増幅回路７、ミキサ８、及び局部発振回路にて第１の
中間周波数に受信信号を変換する。なお、局部水晶発振
回路は上記送信回路部の水晶発振回路９を用いており、
その出力を所定の一周波数まででい倍するてい倍回路１
０と、このてい倍回路１０出力から不要なスプリアスを
削減するバンドパスフィルタ１１とからなり、てい倍回
路１０では水晶発振回路９出力を送信周波数までてい倍
する。この前段回路にて得られた中間周波数は中間周波
数増幅回路１２にて増幅され、次段の発振回路１４出力
をミキサ１３にて混合して所望の中間周波数に変換する
。このミキサ１３出力はリミット増幅回路１５及び復調
回路１６を介して復調され、低周波増幅回路１７にて増
幅してデータ信号が出力される。なお、上記水晶発振回
路９は水晶切換回路１８にて水晶振動子を切り換えるこ
とにより、送受信チャンネルを複数チャンネル設定する
ことができる。また、この無線通信装置では通常時には
受信待機状態になっており、送信時に送受信状態となる
ものである。この種の無線通信装置では、持ち歩きを行
うために小型携帯性が必要であり、しかもバッテリ方式
であるから、回路構成を簡素化して溜置電力を少なくし
、また当然の事ではあるがローコストである必要がある
が、上述のように水晶振動子を複数個用いる場合には、
上述の目的を果たすことができない問題があった。[Background technology 1] In recent years, the development of information transmission devices related to new media has been remarkable, and wireless communication devices that transmit voice and data are used for simple calls and communications in homes, offices, and warehouses. ing. Such an S-line communication device requires at least two to three channels to enable simultaneous use of multiple channels. These wireless communications are often subject to radio wave interference due to radiated noise from other wireless systems, electrical appliances such as audio equipment, or other equipment. Therefore, in the past, the number of crystal resonators corresponding to the channel was switched,
Alternatively, a PLL synthesizer type IC was used. The crystal oscillator switching type wireless communication device will be described with reference to FIG. This wireless communication device is
The antenna 1 is also used for transmission and reception. The transmission circuit section includes a modulation circuit 3 that reduces high-frequency signals from transmission data using a low-pass filter 2, and modulates the output of a crystal oscillation circuit 9 using a crystal oscillator that generates a carrier signal using the output of the low-pass filter 2. The output of this modulation circuit 3 is multiplied by a predetermined transmission frequency in a multiplier circuit 4, and unnecessary spurious signals are removed from the output of the multiplier circuit 4 in a panned bus filter 5 for transmission. The receiving circuit section is a double superhetero gain type circuit, and includes a bandpass filter 6 that passes the received signal of the desired frequency, a high frequency amplification circuit 7, a mixer 8, and a local oscillation circuit that converts the received signal to the first intermediate frequency. Convert the received signal. Note that the local crystal oscillation circuit uses the crystal oscillation circuit 9 of the transmitting circuit section,
Multiplier circuit 1 that multiplies the output up to a predetermined frequency
0 and a bandpass filter 11 for reducing unnecessary spurious from the output of the multiplier circuit 10. The multiplier circuit 10 multiplies the output of the crystal oscillation circuit 9 up to the transmission frequency. The intermediate frequency obtained by this previous stage circuit is amplified by an intermediate frequency amplification circuit 12, and the output of the next stage oscillation circuit 14 is mixed by a mixer 13 and converted into a desired intermediate frequency. The output of this mixer 13 is demodulated via a limit amplifier circuit 15 and a demodulation circuit 16, and amplified by a low frequency amplifier circuit 17 to output a data signal. The crystal oscillation circuit 9 can set a plurality of transmission and reception channels by switching the crystal oscillators in the crystal switching circuit 18. Further, this wireless communication device is normally in a reception standby state, and is in a transmitting/receiving state when transmitting. This type of wireless communication device needs to be small and portable so that it can be carried around, and since it is battery-powered, the circuit configuration can be simplified to reduce stored power, and of course, it can be made at low cost. However, when using multiple crystal units as mentioned above,
There was a problem that the above purpose could not be achieved.
また、ＰＬＬシンセサイザを用いた場合も同様のことが
言える。The same thing can also be said when a PLL synthesizer is used.
［発明の目的１
本発明は上述の点に鑑みて為されたものであり、その目
的とするところは、小型でローコストであり無線通信装
置を提供することにある。[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its object is to provide a compact and low-cost wireless communication device.
［発明の開示］
（実施例）
本発明は、水晶発振回路９の水晶振動子の発振容量を切
り換えることにより、複数プヤンネルを設定でき、しか
も装置の小型化、及びローコスト化を図ることができる
ようにしたものである。[Disclosure of the Invention] (Example) The present invention is capable of setting a plurality of channel channels by switching the oscillation capacity of the crystal resonator of the crystal oscillation circuit 9, and also makes it possible to reduce the size and cost of the device. This is what I did.
以下、図面に従って説明する。＠１図は本発明の一実施
例を示す図であり、第４図の従来例と比べた場合、水晶
発振回路９に発振容量を切り換える発振容量切換手段と
しての発振？１切換回路１９を備えたものである。The explanation will be given below according to the drawings. @ Figure 1 is a diagram showing an embodiment of the present invention, and when compared with the conventional example shown in Figure 4, oscillation as an oscillation capacitance switching means for switching the oscillation capacitance to the crystal oscillation circuit 9? 1 switching circuit 19.
この発振容量切換回路１９と水晶発振回路９の具体回路
に第２図に従って説明する。水晶発振回路９はトランジ
スタＱ Ｉ 、水晶振動子Ｘ１コイルＬ１コンデンサＣ
１，Ｃ３，Ｃい及び抵抗Ｒ１〜Ｒ４からなるコルピッツ
型の発振回路にて構成しである。また、発振容量切換回
路１９は水晶振動子Ｘに直列に発振容量を接続するもの
であり、直列発振容量としてのコンデンサＣ９〜Ｃ７を
水晶振動子Ｘに夫々切換接続するスイッチＳＷを備えて
いる。The specific circuits of the oscillation capacitance switching circuit 19 and the crystal oscillation circuit 9 will be explained with reference to FIG. The crystal oscillation circuit 9 includes a transistor Q I, a crystal oscillator X1, a coil L1, a capacitor C
It is constructed of a Colpitts type oscillation circuit consisting of resistors R1 to R4. The oscillation capacitance switching circuit 19 connects an oscillation capacitor in series with the crystal resonator X, and includes switches SW for selectively connecting capacitors C9 to C7 as series oscillation capacitors to the crystal resonator X, respectively.
つまり、水晶振動子Ｘに上記コンデンサＣ１〜ｃ７をス
イッチＳＷにて切換接続することにより、３チヤンネル
を確保することができる。第３図は夫々のコンデンサＣ
３〜Ｃ１を水晶振動子ＸＩ：接続したときの水晶振動子
Ｘのリアクタンス特性を示す。That is, by selectively connecting the capacitors C1 to C7 to the crystal resonator X using the switch SW, three channels can be secured. Figure 3 shows each capacitor C
The reactance characteristics of the crystal oscillator X when 3 to C1 are connected to the crystal oscillator XI are shown.
なお、上記切り換え周波数は、使用する水晶振動子Ｘの
オーバトーン次数に応じて、水晶振動子Ｘの特性が十分
に生かせる範囲で設定し、キャリアのチャンネル間隔は
てい倍回路４のてい倍数にて決定する。The above switching frequency is set within a range that allows the characteristics of the crystal oscillator X to be fully utilized according to the overtone order of the crystal oscillator X used, and the carrier channel spacing is set at a multiple of the multiplier circuit 4. decide.
［発明の効果］
本発明は上述のように、水晶発振回路の発振゛容量を切
り換える発振容量切換手段を備えているので、１個の水
晶を用いてその発ｉ容量を切り換える極めて簡単な手段
で、通信チャンネルを複数チャンネル設定することがで
き、このため小型化及びローコスト化が可能となるとと
もに利便性を高めることができる効果を奏する。[Effects of the Invention] As described above, the present invention is equipped with an oscillation capacitance switching means for switching the oscillation capacitance of the crystal oscillation circuit, so it is an extremely simple means to switch the oscillation capacitance using one crystal. , it is possible to set a plurality of communication channels, which has the effect of making it possible to reduce the size and cost, and to improve convenience.
第１図は本発明の一実施例の回路構成を示すブロック図
、第２図は同上の要部具体回路図、第３図は同上の動作
を示す説明図、第４図は従来例の回路構成を示すブロッ
ク図である。
９は水晶発振回路、１９は発振容量切換回路、Ｘは水晶
振動子である。
代理人 弁理士 石 １）長 七
第２図
第３図
ｆ＋ ｆ２ｆ３FIG. 1 is a block diagram showing the circuit configuration of an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the main parts of the same, FIG. 3 is an explanatory diagram showing the operation of the same, and FIG. 4 is a circuit of a conventional example. FIG. 2 is a block diagram showing the configuration. 9 is a crystal oscillation circuit, 19 is an oscillation capacitance switching circuit, and X is a crystal resonator. Agent Patent Attorney Ishi 1) Chief 7 Figure 2 Figure 3 f+ f2f3
Claims (1)
、水晶振動子を用いた水晶発振回路にて送信回路部のキ
ャリア信号及び受信回路部の局部発振信号用の信号を発
生する無線通信装置において、上記水晶発振回路の水晶
振動子の発振容量を切り換える発振容量切換手段を備え
て成ることを特徴とする無線通信装置。(1) A wireless communication device that transmits and receives signals to and from the other party using different transmitting and receiving frequencies, and generates signals for a carrier signal in the transmitting circuit section and a local oscillation signal in the receiving circuit section using a crystal oscillation circuit using a crystal resonator. A wireless communication device characterized in that it comprises oscillation capacitance switching means for switching the oscillation capacitance of the crystal resonator of the crystal oscillation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14844986A JPS635626A (en) | 1986-06-25 | 1986-06-25 | Radio communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14844986A JPS635626A (en) | 1986-06-25 | 1986-06-25 | Radio communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS635626A true JPS635626A (en) | 1988-01-11 |
Family
ID=15453032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14844986A Pending JPS635626A (en) | 1986-06-25 | 1986-06-25 | Radio communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS635626A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6736636B2 (en) | 2000-06-20 | 2004-05-18 | Tokyo Electron Limited | Thermal processor with gas supply |
| KR100435554B1 (en) * | 1998-12-22 | 2004-10-14 | 서창전기통신 주식회사 | Radio Frequency Transceiver System by Crystal Switching |
| JP2011040636A (en) * | 2009-08-13 | 2011-02-24 | Tokyo Electron Ltd | Gas port structure and processing apparatus |
-
1986
- 1986-06-25 JP JP14844986A patent/JPS635626A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100435554B1 (en) * | 1998-12-22 | 2004-10-14 | 서창전기통신 주식회사 | Radio Frequency Transceiver System by Crystal Switching |
| US6736636B2 (en) | 2000-06-20 | 2004-05-18 | Tokyo Electron Limited | Thermal processor with gas supply |
| JP2011040636A (en) * | 2009-08-13 | 2011-02-24 | Tokyo Electron Ltd | Gas port structure and processing apparatus |
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