JPS6345070Y2 - - Google Patents
Info
- Publication number
- JPS6345070Y2 JPS6345070Y2 JP5183083U JP5183083U JPS6345070Y2 JP S6345070 Y2 JPS6345070 Y2 JP S6345070Y2 JP 5183083 U JP5183083 U JP 5183083U JP 5183083 U JP5183083 U JP 5183083U JP S6345070 Y2 JPS6345070 Y2 JP S6345070Y2
- Authority
- JP
- Japan
- Prior art keywords
- high frequency
- battery
- converter
- circuit
- inflow prevention
- 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
- 230000002265 prevention Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 description 4
- 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
- 230000005540 biological transmission 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
高周波流入防止線輪５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. 1 is a case body, which serves as a shield and serves as a shear ground for the circuit. 2 is 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 modulation high frequency output circuit 3. Further, 6 indicates a battery, the positive electrode of which is connected to the input terminal IN of the DC-DC converter 4 via the high frequency inflow prevention wire 5, and the output terminal OUT of the DC-DC converter 4 is connected to the modulated high frequency output circuit 3.
It is connected to the power supply 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 supply. That is, the electromotive force of battery 6 is
The voltage is about 1.5 [V], and it is necessary to step up the voltage to obtain a circuit power supply of about 9 [V]. Therefore, a DC-DC converter 4 is provided between the battery 6 and the modulated high frequency output circuit 3. .
また、変調高周波出力回路３の高周波出力は電
池６の正極と高周波流入防止線輪５との接続点に
印加され、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。 Further, the high frequency output of the modulated high frequency output circuit 3 is applied to the connection point between the positive electrode of the battery 6 and the high frequency inflow prevention coil 5, and the high frequency signal passes through the inside of the battery 6 and then is sent to the antenna matching line via the power switch 7. ring 8
The antenna 9 connected to one end of the antenna matching coil 8 radiates into space as a radio wave. 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 each other via the case body 1 serving as a shear shear ground.
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、高周波流入防止線輪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.The high frequency inflow prevention coil 5 has such a structure. This was provided in order to eliminate the inconvenience (described later) when realizing this. 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 let's look at the battery in this type of circuit (the battery that serves as the path for the high-frequency signal).
When a DC-DC converter is connected to the input side of the DC-DC converter, the capacitor connected in parallel to the input side of the DC-DC converter and the equivalent capacitance inside the DC-DC converter may short-circuit the high-frequency signal and reduce the output. Preventing.
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〕）が高周波流入防止
線輪５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電池６の
正極と高周波流入防止線輪５との接続点に印加さ
れるが、高周波流入防止線輪５のインダクタンス
によりDC−DCコンバータ４側のインピーダンス
は非常に高く、よつて高周波電流は電池６→電源
スイツチ７→アンテナ整合線輪８へと流れ、アン
テナ９から電波として放射される。なお、DC−
DCコンバータは内部のスイツチング動作により
ノイズが発生しやすいが、高周波流入防止線輪５
により阻止され、ノイズが外部へ放射されるのを
防ぐ作用もある。 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 (about 1.5 [V]) of the battery 6 is transferred to the The voltage is input to the DC converter 4, boosted to a voltage (approximately 9 V) necessary for circuit operation, 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 the signal using the sound detected by the microphone 2, and generates a high-frequency signal. Next, this high frequency signal is applied to the connection point between the positive electrode of the battery 6 and the high frequency inflow prevention wire 5, but the impedance on the DC-DC converter 4 side is very high due to the inductance of the high frequency inflow prevention wire 5. The high frequency current flows from the battery 6 to the power switch 7 to the antenna matching wire ring 8, and is radiated from the antenna 9 as radio waves. In addition, DC−
DC converters tend to generate noise due to internal switching operations, but high-frequency inflow prevention coils 5
It also has the effect of preventing noise from being radiated to the outside.
（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流入防止線輪を挿入
し、変調された高周波信号を電池と高周波流入防
止線輪との接続点に印加し、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することができ、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 high-frequency inflow prevention wire is inserted between the converter and a modulated high-frequency signal is applied to the connection point between the battery and the high-frequency inflow prevention wire, and the high-frequency signal is 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, which 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……高周波流入防止線輪、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
...Modulated high frequency output circuit, 4...DC-DC converter, 5...High frequency inflow prevention wire, 6...Battery,
7...Power switch, 8...Antenna matching wire ring,
9...Antenna.
Claims (1)
コンバータを設け、電池とDC−DCコンバータと
の間に高周波流入防止線輪を挿入し、変調された
高周波信号を電池と高周波流入防止線輪との接続
点に印加し、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 high frequency inflow prevention wire is inserted between the battery and the DC-DC converter, a modulated high frequency signal is applied to the connection point between the battery and the high frequency inflow prevention wire, 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 |
|---|---|---|---|
| JP5183083U JPS59157340U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5183083U JPS59157340U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59157340U JPS59157340U (en) | 1984-10-22 |
| JPS6345070Y2 true JPS6345070Y2 (en) | 1988-11-22 |
Family
ID=30182222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5183083U Granted JPS59157340U (en) | 1983-04-07 | 1983-04-07 | wireless microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59157340U (en) |
-
1983
- 1983-04-07 JP JP5183083U patent/JPS59157340U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59157340U (en) | 1984-10-22 |
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