JPS6447175U - - Google Patents
Info
- Publication number
- JPS6447175U JPS6447175U JP14157087U JP14157087U JPS6447175U JP S6447175 U JPS6447175 U JP S6447175U JP 14157087 U JP14157087 U JP 14157087U JP 14157087 U JP14157087 U JP 14157087U JP S6447175 U JPS6447175 U JP S6447175U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- power supply
- speaker
- switching
- circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は本考案の一実施例の電源供給回路を示
す回路図、第２図は従来の液晶テレビジヨン受像
機における音声回路を示す回路図である。
１１……アダプタ挿入部、１２……電源切換装
置、１３……電池、１５……電源オン／オフスイ
ツチ、１６……検出回路、１７……切換信号発生
回路、１８……音声出力制御用スイツチ、１９…
…出力回路、２０……音声回路、２４……イヤホ
ーンジヤツク、２６……スピーカ。
FIG. 1 is a circuit diagram showing a power supply circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing an audio circuit in a conventional liquid crystal television receiver. 11...Adapter insertion part, 12...Power switching device, 13...Battery, 15...Power on/off switch, 16...Detection circuit, 17...Switching signal generation circuit, 18...Audio output control switch, 19...
...Output circuit, 20...Audio circuit, 24...Earphone jack, 26...Speaker.
Claims (1)
脱に応じてアダプタ電源と電池電源を切り換える
電源切換手段と、 この電源切換手段からの電源電圧を回路電源と
して動作する音声回路であつて、イヤホーンを挿
着するジヤツク部を有し、イヤホーンの挿脱に応
じて音声出力をイヤホーン又はスピーカに選択的
に出力する音声回路と、 前記電源切換手段によつて切り換えられた電源
に応じた検出信号を得る検出手段と、 この検出手段の検出信号に基づいて音声出力制
御用の切換信号を発生する切換信号発生回路と、 前記音声回路におけるスピーカへの信号供給路
に設けられ、前記切換信号に基づいてスピーカへ
の信号供給をオン、オフするものであつて、アダ
プタ電源使用時は信号をスピーカへ電力増幅して
出力し、電池電源使用時は信号供給をオフにする
スピーカ出力手段とを具備したことを特徴とする
電源供給回路。[Claims for Utility Model Registration] A power supply switching means having an insertion part for inserting an adapter and switching between an adapter power source and a battery power supply in response to insertion and removal of the adapter, and a power supply voltage from the power supply switching means as a circuit power source. an operative audio circuit, which has a jack portion into which an earphone is inserted, and selectively outputs audio output to the earphone or speaker in response to insertion and removal of the earphone; and an audio circuit that is switched by the power source switching means. a detection means for obtaining a detection signal according to the detected power supply; a switching signal generation circuit for generating a switching signal for audio output control based on the detection signal of the detection means; and a signal supply path to the speaker in the audio circuit. The device turns on and off the signal supply to the speaker based on the switching signal, and when the adapter power is used, the signal is amplified and output to the speaker, and when the battery power is used, the signal supply is turned off. A power supply circuit characterized in that it is equipped with a speaker output means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14157087U JPS6447175U (en) | 1987-09-18 | 1987-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14157087U JPS6447175U (en) | 1987-09-18 | 1987-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6447175U true JPS6447175U (en) | 1989-03-23 |
Family
ID=31406751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14157087U Pending JPS6447175U (en) | 1987-09-18 | 1987-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6447175U (en) |
-
1987
- 1987-09-18 JP JP14157087U patent/JPS6447175U/ja active Pending
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