JPS645494B2 - - Google Patents
Info
- Publication number
- JPS645494B2 JPS645494B2 JP25135483A JP25135483A JPS645494B2 JP S645494 B2 JPS645494 B2 JP S645494B2 JP 25135483 A JP25135483 A JP 25135483A JP 25135483 A JP25135483 A JP 25135483A JP S645494 B2 JPS645494 B2 JP S645494B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- speaker
- low frequency
- switch
- power supply
- 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
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ラジオ受信機、ラジオ受信機付テー
プレコーダその他拡声装置等の低周波増幅回路と
スピーカとを有する電子機器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to electronic equipment having a low frequency amplification circuit and a speaker, such as a radio receiver, a tape recorder with a radio receiver, and a public address system.
従来例の構成とその問題点
一般に、低周波増幅回路とスピーカを有する電
子機器は第１図に示すように、低周波増幅回路
Anp１、スピーカSP１、電源切替と音声出力切替
を兼ねた２接点２回路のスイツチS1-1，S1-2と外
部入力のための２端子で構成されたジヤツクＴ１
を備えてあり、低周波増幅回路Anp１の出力は出
力端子ｅより結合コンデンサＣ１を介してスイツ
チS1-1のON側の独立端子に結ばれ、そのスイツ
チS1-1の共通端子はスピーカSP１の片方に結ば
れ、スピーカSP１の一方はアースは結ばれてい
る。スイツチS1-1のもう一方の独立端子はジヤツ
クＴ１の一方の端子に結ばれ、ジヤツクＴ１のも
う一方の端子はアースに結ばれている。スイツチ
S1-2のON側の独立端子には電源Ｕ１のプラスが
結ばれ、そのスイツチS1-2の共通端子は低周波増
幅回路Anp１の電源端子ａに結ばれている。今電
源スイツチS1-1，S1-2をONとすると、スイツチ
S1-2で電源プラスが低周波増幅回路Anp１に供給
され、低周波増幅回路Anp１の入力端子ｃ，ｄに
与えられた信号が増幅されて結合コンデンサＣ
１、スイツチS1-1を介してスピーカSP１に供給
されて音と出力される。スイツチS1-1，S1-2を
OFF側とすると、低周波増幅回路Anp１は電源を
断れて停止し、ジヤツクＴ１に外部より信号が入
力されるとスイツチS1-1を介してスピーカSP１
に供給されて外部入力が音として出力される。Conventional configuration and its problems In general, electronic equipment that has a low frequency amplification circuit and a speaker has a low frequency amplification circuit as shown in Figure 1.
A np 1, speaker SP1, 2-contact 2-circuit switch S 1-1 , S 1-2 that also serves as power supply switching and audio output switching, and jack T1 consisting of 2 terminals for external input.
The output of the low frequency amplifier circuit A np 1 is connected from the output terminal e to the independent terminal on the ON side of the switch S 1-1 via the coupling capacitor C1, and the common terminal of the switch S 1-1 is It is connected to one side of speaker SP1, and one side of speaker SP1 is connected to ground. The other independent terminal of switch S 1-1 is tied to one terminal of jack T1, and the other terminal of jack T1 is tied to ground. switch
The positive terminal of the power supply U1 is connected to the independent terminal on the ON side of S 1-2 , and the common terminal of the switch S 1-2 is connected to the power supply terminal a of the low frequency amplifier circuit A np 1. If you turn on power switches S 1-1 and S 1-2 now, the switches will turn on.
S 1-2 supplies the power supply positive to the low frequency amplifier circuit A np 1, and the signals given to the input terminals c and d of the low frequency amplifier circuit A np 1 are amplified and connected to the coupling capacitor C.
1. The signal is supplied to the speaker SP1 via the switch S1-1 and output as sound. Switch S 1-1 , S 1-2
When set to the OFF side, the low frequency amplifier circuit A np 1 is turned off and stopped, and when a signal is input from the outside to the jack T1, the low frequency amplifier circuit A np 1 is output to the speaker SP 1 via the switch S 1-1 .
and the external input is output as sound.
しかしながら、以上の従来回路においては、電
源切替とスピーカSP１への入力切替とに２回路
２接点のスイツチが必要となり、商品の小型化に
は不向きであつた。 However, the conventional circuit described above requires a two-circuit, two-contact switch for switching the power supply and switching the input to the speaker SP1, and is not suitable for miniaturizing products.
発明の目的
本発明の目的は、スイツチの回路数を減らし、
小型化とともにコストダウンをはかることができ
る電子機器を提供することにある。Purpose of the invention The purpose of the present invention is to reduce the number of switch circuits,
The purpose of the present invention is to provide electronic equipment that can be miniaturized and cost reduced.
発明の構成
本発明の電子機器は、上記の目的を達成するた
め、低周波増幅回路の出力を結合コンデンサを介
してスピーカに結合し、上記結合コンデンサと前
記スピーカとの結合点を前記ジヤツクの一方の端
子に結合し、前記ジヤツクの他方の端子を前記電
源スイツチの一方の独立端子に結合し、前記電源
スイツチの共通端子をアースに、他方の独立端子
を電源のマイナスに結合し、上記電源のプラスを
直接前記低周波増幅回路の電源端子に結合したこ
とを特長とするものである。Structure of the Invention In order to achieve the above object, an electronic device of the present invention couples the output of a low frequency amplifier circuit to a speaker via a coupling capacitor, and connects the coupling point between the coupling capacitor and the speaker to one side of the jack. the other terminal of the jack is connected to one independent terminal of the power switch, the common terminal of the power switch is connected to ground, the other independent terminal is connected to the negative terminal of the power supply, This is characterized in that the positive terminal is directly coupled to the power supply terminal of the low frequency amplifier circuit.
実施例の説明
第２図は本発明の一実施例を示しており、第２
図において、第１図に同一の構成要素には同一記
号を付してある。第２図において第１図と異なる
ところは、低周波増幅回路Anp１の出力が結合コ
ンデンサＣ１を介してスピーカSP１と結合され、
その結合コンデンサＣ１とスピーカSP１の結合
点が直接ジヤツクＴ１の一方の端子に結合され、
ジヤツクＴ１のもう一方の端子が２接点１回路で
構成されたスイツチＳ２の独立端子に結合され、
このスイツチＳ２のもう一方の独立端子が電源Ｕ
１のマイナス側に結合されており、このスイツチ
Ｓ２の共通端子がアースに結合されており、かつ
電源Ｕ１のプラスが直接低周波増幅回路Anp１の
電源端子ａに結合されていることである。DESCRIPTION OF EMBODIMENTS FIG. 2 shows an embodiment of the present invention.
In the figure, the same components as in FIG. 1 are given the same symbols. The difference between FIG. 2 and FIG. 1 is that the output of the low frequency amplifier circuit A np 1 is coupled to the speaker SP 1 via the coupling capacitor C 1 .
The coupling point between the coupling capacitor C1 and the speaker SP1 is directly coupled to one terminal of the jack T1,
The other terminal of jack T1 is coupled to an independent terminal of switch S2, which is configured with two contacts and one circuit.
The other independent terminal of this switch S2 is the power supply U.
The common terminal of this switch S2 is connected to the ground, and the positive terminal of the power supply U1 is directly connected to the power supply terminal a of the low frequency amplifier circuit A np 1. .
このような構成において、今、スイツチＳ２を
電源ON側に倒すと、電源Ｕ１のマイナスがアー
スと結ばれ、低周波増幅回路Anp１に電源Ｕ１が
供給されるために低周波増幅回路Anp１は動作を
始める。そして、入力端子ｃ，ｄに与えられた信
号が低周波増幅回路Anp１で増幅され、スピーカ
SP１に供給されて音として出力される。このと
き、ジヤツクＴ１に外部入力が与えられてもスイ
ツチＳ２によつて外部入力のアース側が断れてい
るためスピーカSP１へ入力されない。一方、ス
イツチＳ２をOFF側へ倒すと、低周波増幅回路
Anp１の動作は電源が断れるため停止し、入力端
子ｃ，ｄ間に加えられた信号はスピーカSP１へ
は出力されずに、ジヤツクＴ１に外部入力が与え
られるとスピーカSP１へ供給されて音として出
力される。 In such a configuration, when switch S2 is turned to the power ON side, the negative terminal of power supply U1 is connected to the ground, and power supply U1 is supplied to low frequency amplifier circuit A np 1, so that low frequency amplifier circuit A np 1 starts operation. Then, the signals given to the input terminals c and d are amplified by the low frequency amplifier circuit A np 1, and the signals are output to the speaker.
It is supplied to SP1 and output as sound. At this time, even if external input is applied to jack T1, it is not input to speaker SP1 because the ground side of the external input is cut off by switch S2. On the other hand, when switch S2 is turned to the OFF side, the low frequency amplification circuit
The operation of A np 1 is stopped because the power is cut off, and the signal applied between input terminals c and d is not output to speaker SP1, but when an external input is given to jack T1, it is supplied to speaker SP1 and the signal is output to speaker SP1. is output as
第３図は本発明の他の実施例を示しており、ス
テレオ用の低周波増幅回路Anp、結合コンデンサ
Ｃ、スピーカSP等にはそれぞれＲ，Ｌの符号を
付してある。第２図に示したモノラルの場合と異
なるところはステレオ用のジヤツクＴ２の各々の
端子を左右のチヤンネル用の結合コンデンサCL，
CRとスピーカSPL，SPRの結合したことである。
このように構成すると、スイツチＳ２のON−
OFF操作に応じて低周波増幅回路AnpＬ，AnpＲ
を動作制御することができ、ジヤツクＴ２の外部
入力をオン、オフ制御することができる。 FIG. 3 shows another embodiment of the present invention, in which a stereo low-frequency amplification circuit A np , a coupling capacitor C, a speaker SP, etc. are labeled R and L, respectively. The difference from the monaural case shown in Figure 2 is that each terminal of the stereo jack T2 is connected to a coupling capacitor C L for the left and right channels,
This is the combination of C R and speakers S L and S R .
With this configuration, switch S2 is ON-
Low frequency amplification circuit A np L, A np R depending on OFF operation
The operation of the jack T2 can be controlled, and the external input of the jack T2 can be turned on and off.
発明の効果
以上のように本発明によれば、２接点１回路で
構成される電源スイツチにより電源切替と外部入
力の切替えを実現することができるため、電子機
器自体の小型化と共にコストダウンを図ることが
できる利点を有する。Effects of the Invention As described above, according to the present invention, it is possible to realize power supply switching and external input switching with a power switch configured with two contacts and one circuit, thereby reducing the size and cost of electronic equipment itself. It has the advantage of being able to
第１図は従来の電子機器の回路結線図、第２図
は本発明の一実施例を示す回路結線図、第３図は
本発明の他の実施例を示す回路結線図である。
Anp１，AnpＬ，AnpＲ……低周波増幅回路、
Ｃ１，CR，CL……結合コンデンサ、Ｓ２……ス
イツチ、SP１，SPL，SPR……スピーカ、Ｔ１，
Ｔ２……外部入力ジヤツク、Ｕ１……電源。
FIG. 1 is a circuit connection diagram of a conventional electronic device, FIG. 2 is a circuit connection diagram showing one embodiment of the present invention, and FIG. 3 is a circuit connection diagram showing another embodiment of the present invention. A np 1, A np L, A np R……Low frequency amplifier circuit,
C1, CR , C L ...Coupling capacitor, S2...Switch, SP1, SP L , SP R ...Speaker, T1,
T2...external input jack, U1...power supply.
Claims (1)
してスピーカに結合すると共に上記結合コンデン
サと上記スピーカの結合点をジヤツクの可動端子
に結合し、上記ジヤツクの共通端子を共通端子が
アースに接続された２接点１回路の電源スイツチ
の一方の固定端子に結合し、上記電源スイツチの
他方の固定端子を電源のマイナス側に接続し、上
記電源のプラス側を直接上記低周波増幅回路の電
源供給端子に接続したことを特徴とする電子機
器。1. The output of the low frequency amplifier circuit is coupled to a speaker via a coupling capacitor, and the coupling point of the coupling capacitor and the speaker is coupled to a movable terminal of a jack, and the common terminal of the jack is connected to ground. Connect to one fixed terminal of a two-contact one-circuit power switch, connect the other fixed terminal of the power switch to the negative side of the power supply, and connect the positive side of the power supply directly to the power supply terminal of the low frequency amplifier circuit. An electronic device characterized by being connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25135483A JPS60143030A (en) | 1983-12-29 | 1983-12-29 | Electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25135483A JPS60143030A (en) | 1983-12-29 | 1983-12-29 | Electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60143030A JPS60143030A (en) | 1985-07-29 |
| JPS645494B2 true JPS645494B2 (en) | 1989-01-31 |
Family
ID=17221577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25135483A Granted JPS60143030A (en) | 1983-12-29 | 1983-12-29 | Electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60143030A (en) |
-
1983
- 1983-12-29 JP JP25135483A patent/JPS60143030A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60143030A (en) | 1985-07-29 |
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