JPS6157708U - - Google Patents
Info
- Publication number
- JPS6157708U JPS6157708U JP14219484U JP14219484U JPS6157708U JP S6157708 U JPS6157708 U JP S6157708U JP 14219484 U JP14219484 U JP 14219484U JP 14219484 U JP14219484 U JP 14219484U JP S6157708 U JPS6157708 U JP S6157708U
- Authority
- JP
- Japan
- Prior art keywords
- output
- amplifier
- circuit
- main body
- ground
- 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
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Amplifiers (AREA)
Description
第１図は本考案の一実施例の構成を示す回路構
成図、第２図は本考案のその他の実施例の構成を
示す回路構成図、第３図および第４図はそれぞれ
ＢＴＬ回路におけるパワーフエーダ出力および非
ＢＴＬ回路におけるパワーフエーダ出力を説明す
るための図である。
１３〜１８，２６，２９，３０〜３２，３４〜
３６，３８，３９…抵抗、１９…位置反転回路、
２０，２３，４０…リレー、２１，２２…ブース
タアンプ、２７…コンパレータ、２８…コンデン
サ、３３，３７…差動増幅器。
FIG. 1 is a circuit configuration diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a circuit configuration diagram showing the configuration of another embodiment of the present invention, and FIGS. 3 and 4 are power faders in a BTL circuit, respectively. FIG. 3 is a diagram for explaining the output and the power fader output in a non-BTL circuit. 13-18, 26, 29, 30-32, 34-
36, 38, 39...Resistor, 19...Position inversion circuit,
20, 23, 40... Relay, 21, 22... Booster amplifier, 27... Comparator, 28... Capacitor, 33, 37... Differential amplifier.
Claims (1)
系統に振分けるとともに該前後チヤンネルのレベ
ル関係を調整するパワーフエーダ回路に出力段に
設けて各出力をそれぞれ再生用のスピーカに接続
し得るように構成されたＢＴＬ出力または非ＢＴ
Ｌ出力のオーデイオ機器本体と上記スピーカとの
間に挿入され、上記オーデイオ機器本体から出力
される再生信号を増幅してスピーカに供給するた
めの増設増幅器において、上記オーデイオ機器本
体の出力チヤンネル毎に設けられ各出力を各別に
受けるインピーダンス整合用のマツチング回路と
、該マツチング回路の出力を増幅する増幅回路と
、上記マツチング回路入力端から増幅回路出力端
までの間の回路の少なくとも一部を切換えてＢＴ
Ｌ出力または非ＢＴＬ出力に適合させるための切
換え手段と、上記オーデイオ機器本体の出力の直
流レベルを弁別してＢＴＬ出力か非ＢＴＬ出力か
を判定し該判定に応じて上記切換え手段を作動さ
せる判定回路とを具備したことを特徴とする車載
用増設増幅器。 (2) マツチング回路は対アース間信号を出力す
る抵抗網からなるアツテネータで、且つ増幅回路
は上記アツテネータから出力された対アース間信
号を増幅する増幅器であり、そして切換え手段は
前後のいずれか一方のチヤンネルの上記増幅器出
力の極性および入出力チヤンネルの前後関係を切
換えることを特徴とする実用新案登録請求の範囲
第１項記載の車載用増設増幅器。 (3) マツチング回路は入力信号をスピーカ負荷
にほぼ対応するインピーダンスで受けるダミー抵
抗で、且つ増幅回路は上記ダミー抵抗の両端の電
圧を差動増幅する差動増幅器であり、そして切換
え手段は上記差動増幅器のゲインを切換えること
を特徴とする実用新案登録請求の範囲第１項記載
の車載用増設増幅器。[Scope of claims for utility model registration] (1) Each output of the left and right channels is
A BTL output or a non-BT output is provided in the output stage of a power fader circuit that distributes the power to the system and adjusts the level relationship between the front and rear channels, and connects each output to a speaker for reproduction.
In an expansion amplifier inserted between an L-output audio device main body and the speaker, and for amplifying a playback signal output from the audio device main body and supplying the amplified signal to the speaker, provided for each output channel of the audio device main body. A matching circuit for impedance matching that receives each output separately, an amplifier circuit that amplifies the output of the matching circuit, and at least a part of the circuit between the input terminal of the matching circuit and the output terminal of the amplifier circuit are switched.
A switching means for adapting to L output or non-BTL output, and a determination circuit that discriminates the DC level of the output of the audio equipment main body to determine whether the output is BTL output or non-BTL output, and operates the switching means in accordance with the determination. An in-vehicle expansion amplifier characterized by comprising: (2) The matching circuit is an attenuator made of a resistor network that outputs a signal between the ground and the ground, and the amplifier circuit is an amplifier that amplifies the signal between the ground and the ground that is output from the attenuator. 2. The vehicle-mounted expansion amplifier according to claim 1, wherein the polarity of the amplifier output of the channel and the front-back relationship of the input/output channels are switched. (3) The matching circuit is a dummy resistor that receives the input signal with impedance approximately corresponding to the speaker load, the amplifier circuit is a differential amplifier that differentially amplifies the voltage across the dummy resistor, and the switching means The vehicle-mounted expansion amplifier according to claim 1, characterized in that the gain of the dynamic amplifier is switched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14219484U JPH0247622Y2 (en) | 1984-09-21 | 1984-09-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14219484U JPH0247622Y2 (en) | 1984-09-21 | 1984-09-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6157708U true JPS6157708U (en) | 1986-04-18 |
| JPH0247622Y2 JPH0247622Y2 (en) | 1990-12-14 |
Family
ID=30700522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14219484U Expired JPH0247622Y2 (en) | 1984-09-21 | 1984-09-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0247622Y2 (en) |
-
1984
- 1984-09-21 JP JP14219484U patent/JPH0247622Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0247622Y2 (en) | 1990-12-14 |
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