JPH03125599U - - Google Patents
Info
- Publication number
- JPH03125599U JPH03125599U JP3463990U JP3463990U JPH03125599U JP H03125599 U JPH03125599 U JP H03125599U JP 3463990 U JP3463990 U JP 3463990U JP 3463990 U JP3463990 U JP 3463990U JP H03125599 U JPH03125599 U JP H03125599U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- speaker
- amplification circuit
- capacitor
- earphones
- 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
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
- Television Receiver Circuits (AREA)
Description
第１図はこの考案の実施例を示す構成図、第２
図はスピーカ使用時における第１図の回路を示す
回路図、第３図はイヤホーン使用時における第１
図の回路を示す回路図、第４図及び第５図はこの
考案によりコンデンサを切換えた場合の周波数特
性の変化を説明するための特性図、第６図はスピ
ーカ及びイヤホーンの周波数特性の一例を示す特
性図、第７図はこの考案によりコンデンサを切換
えた状態の音声電力増幅回路までの特性図、第８
図はスピーカ及びイヤホーン出力時の総合特性を
示す特性図、第９図は従来の音声出力回路を示す
構成図、第１０図は従来回路の周波数特性図であ
る。
１１：映像中間周波検波回路、１２：音量コン
トロール回路、１３：中間周波増幅回路、１４：
イヤホーンジヤツク、１５：スピーカ、ＳＷ４１
，ＳＷ４２：スイツチ、Ｃ１１〜Ｃ１４：コンデ
ンサ。
Figure 1 is a configuration diagram showing an embodiment of this invention, Figure 2
The figure is a circuit diagram showing the circuit in Figure 1 when using a speaker, and Figure 3 is a circuit diagram showing the circuit in Figure 1 when using an earphone.
Figures 4 and 5 are characteristic diagrams for explaining changes in frequency characteristics when switching capacitors according to this invention. Figure 6 shows an example of the frequency characteristics of speakers and earphones. The characteristic diagram shown in Figure 7 is the characteristic diagram up to the audio power amplifier circuit with the capacitor switched according to this invention.
FIG. 9 is a characteristic diagram showing the overall characteristics when outputting from a speaker and an earphone, FIG. 9 is a configuration diagram showing a conventional audio output circuit, and FIG. 10 is a frequency characteristic diagram of the conventional circuit. 11: Video intermediate frequency detection circuit, 12: Volume control circuit, 13: Intermediate frequency amplification circuit, 14:
Earphone jack, 15: Speaker, SW 41
, SW42 : switch, C11 to C14 : capacitor.
Claims (1)
ス特性を設定するコンデンサを有した音声増幅回
路と、 この音声増幅回路に接続されるスピーカ及びイ
ヤホーンと、 スピーカ接続時とイヤホーン接続時で前記音声
増幅回路のコンデンサを所定の組合せに切換える
スイツチ手段と、 を具備したことを特徴とする音声出力回路。[Scope of Claim for Utility Model Registration] An audio amplification circuit having a capacitor for setting low-pass characteristics and a capacitor for setting high-pass characteristics, a speaker and earphones connected to this audio amplification circuit, and when connected to the speaker and when connected to the earphones. An audio output circuit comprising: switch means for switching the capacitors of the audio amplification circuit to a predetermined combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3463990U JPH03125599U (en) | 1990-03-30 | 1990-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3463990U JPH03125599U (en) | 1990-03-30 | 1990-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03125599U true JPH03125599U (en) | 1991-12-18 |
Family
ID=31539292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3463990U Pending JPH03125599U (en) | 1990-03-30 | 1990-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03125599U (en) |
-
1990
- 1990-03-30 JP JP3463990U patent/JPH03125599U/ja active Pending
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