JPS6345071Y2 - - Google Patents
Info
- Publication number
- JPS6345071Y2 JPS6345071Y2 JP5183183U JP5183183U JPS6345071Y2 JP S6345071 Y2 JPS6345071 Y2 JP S6345071Y2 JP 5183183 U JP5183183 U JP 5183183U JP 5183183 U JP5183183 U JP 5183183U JP S6345071 Y2 JPS6345071 Y2 JP S6345071Y2
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- battery
- converter
- frequency signal
- circuit
- 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
Links
- 238000004804 winding Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案はワイヤレスマイクロフオンに関する。[Detailed explanation of the idea] (Industrial application field) The present invention relates to a wireless microphone.
（従来技術）
従来のワイヤレスマイクロフオンにおいては、
回路上の要求から９〔Ｖ〕程度の回路電源が必要
であり、そのため一般に水銀電池（例えばHD−
４等）が用いられていた。しかしながら、この種
の比較的高い起電力を有する水銀電池は入手が困
難であるばかりでなく非常に高価であり、不意の
電池切れによりユーザーの受ける不便さはことの
ほか大きい。(Prior art) In the conventional wireless microphone,
Due to circuit requirements, a circuit power supply of about 9 [V] is required, and therefore mercury batteries (for example, HD-
4 etc.) were used. However, this type of mercury battery having a relatively high electromotive force is not only difficult to obtain, but also very expensive, and the inconvenience to the user when the battery runs out unexpectedly is extremely great.
（考案の目的）
本考案は上記の点に鑑み提案されたものであ
り、一般の店頭で販売されている安価な乾電池
（単３電池等）の使用を可能にしたワイヤレスマ
イクロフオンを提供することを目的とする。(Purpose of the invention) The present invention was proposed in view of the above points, and the object is to provide a wireless microphone that can use inexpensive dry batteries (AA batteries, etc.) that are sold in general stores. With the goal.
（考案の構成）
第１図は本考案のワイヤレスマイクロフオンの
構成をブロツク図で示したもので、１はケース本
体であり、シールドを行うと共にシヤーシアース
として回路のグランドとなつている。２はケース
本体１に内蔵されたマイクロフオンで、その出力
端は変調高周波出力回路３に接続され、マイクロ
フオン２に加えられた音声等はマイクロフオン２
を介し電気的信号に変換され、更にこの変調高周
波出力回路３を介しVHF帯におけるFM信号に
変換される。また、６は電池を示し、その正極は
高周波変成器５の２次巻線５ｂを介してDC−DC
コンバータ４の入力端子INに接続され、DC−
DCコンバータ４の出力端子OUTは変調高周波出
力回路３の電源入力端子Vccに接続され変調高周
波出力回路３に対し昇圧した電圧（約９〔Ｖ〕）を
回路電源として与えている。すなわち、電池６の
起電力は1.5〔Ｖ〕程度であり、９〔Ｖ〕程度の回
路電源を得るには昇圧する必要があり、このため
電池６と変調高周波出力回路３との間にDC−DC
コンバータ４が設けられている。(Structure of the invention) Fig. 1 is a block diagram showing the structure of the wireless microphone of the invention, in which numeral 1 is a case body, which serves as a shield and serves as a shear ground for the circuit. Reference numeral 2 denotes a microphone built into the case body 1, the output end of which is connected to the modulated high frequency output circuit 3, and the sound etc. applied to the microphone 2 is transmitted to the microphone 2.
The signal is converted into an electrical signal via the modulating high frequency output circuit 3, and further converted into an FM signal in the VHF band via the modulating high frequency output circuit 3. Further, 6 indicates a battery, the positive electrode of which is connected to DC-DC through the secondary winding 5b of the high frequency transformer 5.
Connected to input terminal IN of converter 4, DC-
The output terminal OUT of the DC converter 4 is connected to the power input terminal Vcc of the modulated high frequency output circuit 3, and supplies a boosted voltage (approximately 9 [V]) to the modulated high frequency output circuit 3 as a circuit power source. That is, the electromotive force of the battery 6 is about 1.5 [V], and it is necessary to boost the voltage to obtain a circuit power supply of about 9 [V]. Therefore, there is a DC- DC
A converter 4 is provided.
また、変調高周波出力回路３の高周波出力端子
OUTは高周波変成器５の１次巻線５ａを介して
ケース本体１に接続され、高周波変成器５の２次
巻線に生じた高周波信号は電池６の内部を通過し
たのち電源スイツチ７を介してアンテナ整合線輪
８の中点タツプに導かれ、アンテナ整合線輪８の
一端に接続されたアンテナ９より電波として空間
に放射されるようになつている。なお、アンテナ
整合線輪８の他端、DC−DCコンバータ４のグラ
ンド端子Ｇおよび変調高周波出力回路３のグラン
ド端子Ｇはシヤーシアースとしてのケース本体１
を介して互いに接続されている。 Also, the high frequency output terminal of the modulated high frequency output circuit 3
OUT is connected to the case body 1 via the primary winding 5a of the high frequency transformer 5, and the high frequency signal generated in the secondary winding of the high frequency transformer 5 passes through the inside of the battery 6 and then is connected to the case body 1 via the power switch 7. The antenna is guided to the center tap of the antenna matching wire ring 8, and is radiated into space as a radio wave from an antenna 9 connected to one end of the antenna matching wire ring 8. The other end of the antenna matching wire ring 8, the ground terminal G of the DC-DC converter 4, and the ground terminal G of the modulated high frequency output circuit 3 are connected to the case body 1 as a shear shear ground.
are connected to each other through.
本考案は電池電圧昇圧用のDC−DCコンバータ
４を備えた点と、高周波信号を電池６を通してア
ンテナ９へ供給した点に一特徴を有するものであ
り、高周波変成器５はかかる構能を実現する際の
不都合（後述）を解消すべく設けられたものであ
る。すなわち、高周波信号の伝送経路を消減する
と共に電池の配置場所等の制限により、電池を大
容量のコンデンサとみなし、電池内部を通してア
ンテナへ高周波信号を供給することは以前から行
われており、本考案ではこの種の回路における電
池（高周波信号の経路となつている電池）にDC
−DCコンバータを直接接続した際にDC−DCコ
ンバータの入力側に並列接続されるコンデンサお
よびDC−DCコンバータ内部の等価的な容量など
により高周波信号が短絡されて出力が低下してし
まうのを防いでいる。 The present invention is characterized in that it is equipped with a DC-DC converter 4 for boosting the battery voltage, and that a high frequency signal is supplied to the antenna 9 through the battery 6, and the high frequency transformer 5 realizes this configuration. This was provided to eliminate the inconvenience (described later) when doing so. In other words, in order to reduce the transmission path of high-frequency signals and to limit the placement of the battery, it has long been possible to treat the battery as a large-capacity capacitor and supply high-frequency signals to the antenna through the inside of the battery. Now, the battery in this type of circuit (the battery that is the path for the high-frequency signal) is connected to DC.
- When the DC converter is directly connected, it prevents the high frequency signal from being short-circuited and the output decreasing due to the capacitor connected in parallel to the input side of the DC-DC converter and the equivalent capacitance inside the DC-DC converter. I'm here.
第２図は第１図に示した本考案の主要部を電気
回路で示したもので、第１図のものと同一部分に
は同一符号を付してある。なお、図中でＣはDC
−DCコンバータ４の入力側に接続されるコンデ
ンサを示し、C'はDC−DCコンバータ４内部の高
周波信号に対する等価的な容量をコンデンサとし
て示している。 FIG. 2 is an electrical circuit diagram showing the main parts of the present invention shown in FIG. 1, and the same parts as those in FIG. 1 are given the same reference numerals. In addition, in the figure, C is DC
- indicates a capacitor connected to the input side of the DC converter 4, and C' indicates an equivalent capacitance for a high frequency signal inside the DC-DC converter 4 as a capacitor.
次に、第１図および第２図に沿つて動作を更に
詳しく説明すると、電源スイツチ７の投入により
電池６の起電力（約1.5〔Ｖ〕）が高周波変成器５
の２次巻線５ｂを介してDC−DCコンバータ４に
入力され、回路の動作に必要な電圧（約９〔Ｖ〕）
まで昇圧されて変調高周波出力回路３の電源端子
に与えられる。これにより変調高周波出力回路３
は動作を始め、搬送信号を発振すると共にマイク
ロフオン２で検出した音声により変調を行い、高
周波信号を発生する。次いでこの高周波信号は高
周波変成器５の１次巻線５ａに印加され、２次巻
線には巻数比に応じた電圧の高周波信号が発生す
るが、DC−DCコンバータ４側は入力側に設けら
れたコンデンサＣおよび内部の等価コンデンサC'
の作用により高周波信号に対してほぼ接地された
ものとなり、よつて高周波電流は高周波変成器５
の２次巻線５ｂ→電池６→電源スイツチ７→アン
テナ整合線輪８へと流れてアンテナ９から電波と
して放射される。すなわち本考案ではDC−DCコ
ンバータ４の容量により高周波信号がバイパスさ
れる作用を逆に利用しており、これにより高周波
信号は何ら減衰されることなく効率よく放射され
る。 Next, to explain the operation in more detail with reference to FIGS. 1 and 2, when the power switch 7 is turned on, the electromotive force (approximately 1.5 [V]) of the battery 6 is applied to the high frequency transformer 5.
The voltage (approximately 9 [V]) required for circuit operation is input to the DC-DC converter 4 through the secondary winding 5b of the
The voltage is boosted up to a maximum voltage and applied to the power supply terminal of the modulated high frequency output circuit 3. As a result, the modulated high frequency output circuit 3
starts operating, oscillates a carrier signal, modulates it with the sound detected by the microphone 2, and generates a high frequency signal. Next, this high frequency signal is applied to the primary winding 5a of the high frequency transformer 5, and a high frequency signal with a voltage according to the turns ratio is generated in the secondary winding. capacitor C and internal equivalent capacitor C'
Due to the action of
secondary winding 5b → battery 6 → power switch 7 → antenna matching wire 8 and is radiated from antenna 9 as a radio wave. That is, in the present invention, the effect of bypassing the high frequency signal by the capacitance of the DC-DC converter 4 is used inversely, so that the high frequency signal is efficiently radiated without being attenuated in any way.
（考案の効果）
以上のように本考案のワイヤレスマイクロフオ
ンにおいては、電池の電圧を昇圧して回路電源を
得るDC−DCコンバータを設け、電池とDC−DC
コンバータとの間に高周波変成器の２次巻線を挿
入し、変調された高周波信号を高周波変成器の１
次巻線に印加し、電池内部を通して高周波信号を
アンテナに供給するようにしたので、低電圧電源
で回路を動作させることができ、入手が容易でか
つ安価な乾電池を使用することが可能となり、ユ
ーザーの負担が大巾に軽減される効果がある。(Effects of the invention) As described above, the wireless microphone of the invention is equipped with a DC-DC converter that boosts the voltage of the battery to obtain circuit power.
A secondary winding of a high frequency transformer is inserted between the converter and the modulated high frequency signal is sent to one of the high frequency transformers.
Since the high frequency signal is applied to the next winding and supplied to the antenna through the inside of the battery, the circuit can be operated with a low voltage power supply, and it is possible to use easily available and inexpensive dry batteries. This has the effect of greatly reducing the burden on the user.
第１図は本考案の一実施例を示すブロツク構成
図、第２図は第１図の主要部を電気回路で示した
説明図である。
１……ケース本体、２……マイクロフオン、３
……変調高周波出力回路、４……DC−DCコンバ
ータ、５……高周波変成器、５ａ，５ｂ……巻
線、６……電池、７……電源スイツチ、８……ア
ンテナ整合線輪、９……アンテナ。
FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the main parts of FIG. 1 as an electric circuit. 1...Case body, 2...Microphone, 3
... Modulation high frequency output circuit, 4 ... DC-DC converter, 5 ... High frequency transformer, 5a, 5b ... Winding wire, 6 ... Battery, 7 ... Power switch, 8 ... Antenna matching wire, 9 ……antenna.
Claims (1)
コンバータを設け、電池とDC−DCコンバータと
の間に高周波変成器の２次巻線を挿入し、変調さ
れた高周波信号を高周波変成器の１次巻線に印加
し、電池内部を通して高周波信号をアンテナに供
給することを特徴としたワイヤレスマイクロフオ
ン。 DC-DC obtains circuit power by boosting battery voltage
A converter is provided, a secondary winding of a high frequency transformer is inserted between the battery and the DC-DC converter, a modulated high frequency signal is applied to the primary winding of the high frequency transformer, and the high frequency signal is passed through the inside of the battery. A wireless microphone characterized by feeding an antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5183183U JPS59157341U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5183183U JPS59157341U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59157341U JPS59157341U (en) | 1984-10-22 |
| JPS6345071Y2 true JPS6345071Y2 (en) | 1988-11-22 |
Family
ID=30182223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5183183U Granted JPS59157341U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59157341U (en) |
-
1983
- 1983-04-07 JP JP5183183U patent/JPS59157341U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59157341U (en) | 1984-10-22 |
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