JPH02134725U - - Google Patents
Info
- Publication number
- JPH02134725U JPH02134725U JP4414789U JP4414789U JPH02134725U JP H02134725 U JPH02134725 U JP H02134725U JP 4414789 U JP4414789 U JP 4414789U JP 4414789 U JP4414789 U JP 4414789U JP H02134725 U JPH02134725 U JP H02134725U
- Authority
- JP
- Japan
- Prior art keywords
- headphone
- btl
- pair amplifier
- output
- impedance
- 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
- 238000010586 diagram Methods 0.000 description 5
Description
第１図はこの考案に係るヘツドホン出力回路の
一実施例を示す回路図、第２図は第１図の等価回
路図、第３図はこの考案の具体的実施例を示す回
路図、第４図は従来のヘツドホン出力回路を示す
回路図、第５図はポツプ音の発生原因を説明する
説明図である。
１１〜１４…ＢＴＬペアアンプ、１５，１６…
スピーカ、１７…ヘツドホンジヤツク、１９，２
０…出力制限抵抗（第１の抵抗）、２１，２２…
第２の抵抗、２３，２４…ヘツドホン交流インピ
ーダンス、２５…コモン端子。
FIG. 1 is a circuit diagram showing an embodiment of the headphone output circuit according to this invention, FIG. 2 is an equivalent circuit diagram of FIG. 1, FIG. 3 is a circuit diagram showing a specific embodiment of this invention, and FIG. FIG. 5 is a circuit diagram showing a conventional headphone output circuit, and FIG. 5 is an explanatory diagram illustrating the cause of pop noise. 11~14...BTL pair amplifier, 15, 16...
Speaker, 17... Headphone jack, 19,2
0... Output limiting resistor (first resistor), 21, 22...
Second resistor, 23, 24... Headphone AC impedance, 25... Common terminal.
Claims (1)
の信号を出力するＢＴＬペアアンプと、 ヘツドホン使用時、ヘツドホンを間に挟んで前
記ＢＴＬペアアンプの出力端子間に直列接続し、
前記ヘツドホンのコモン端子と各ＢＴＬペアアン
プの出力端子間の交流インピーダンスがほぼ等し
くなるようにした第１及び第２の抵抗とを具備し
たことを特徴とするヘツドホン出力回路。[Claims for Utility Model Registration] A BTL pair amplifier that amplifies signals of opposite phase and outputs a signal for one channel, and when using a headphone, the BTL pair amplifier is connected in series between the output terminals of the BTL pair amplifier with the headphone in between. ,
A headphone output circuit characterized in that it comprises first and second resistors so that the AC impedance between the common terminal of the headphone and the output terminal of each BTL pair amplifier is approximately equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4414789U JPH02134725U (en) | 1989-04-14 | 1989-04-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4414789U JPH02134725U (en) | 1989-04-14 | 1989-04-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134725U true JPH02134725U (en) | 1990-11-08 |
Family
ID=31557188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4414789U Pending JPH02134725U (en) | 1989-04-14 | 1989-04-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134725U (en) |
-
1989
- 1989-04-14 JP JP4414789U patent/JPH02134725U/ja active Pending
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