JPH0434099U - - Google Patents
Info
- Publication number
- JPH0434099U JPH0434099U JP7448690U JP7448690U JPH0434099U JP H0434099 U JPH0434099 U JP H0434099U JP 7448690 U JP7448690 U JP 7448690U JP 7448690 U JP7448690 U JP 7448690U JP H0434099 U JPH0434099 U JP H0434099U
- Authority
- JP
- Japan
- Prior art keywords
- bus
- audio
- controller
- audio source
- pcm
- 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 6
- 230000005236 sound signal Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Description
第１図は本考案のオーデイオ装置のブロツク図
、第２図はデジタルアンプの構成図、第３図は従
来のオーデイオ装置の構成図、第４図は音量を1/
2にする前の音声信号波形Ｓ１と、従来方式によ
り音量を1/2にした場合の音声信号波形Ｓ２と、
理想的に音量を1/2した場合の音声信号波形図Ｓ
３とＰＷＭ信号の波形図、第５図は３ビツトのＰ
ＣＭデータと、該３ビツトデータを1/2した場合
の２ビツトのＰＣＭデータを示す図表である。
１０……バスライン、１１……システムコント
ローラ、１４……オーデイオソース、１５ａ〜１
５ｄ……デジタルアンプ、１５−１……ＰＣＭ・
ＰＷＭ変換部。
Fig. 1 is a block diagram of the audio device of the present invention, Fig. 2 is a block diagram of a digital amplifier, Fig. 3 is a block diagram of a conventional audio device, and Fig. 4 is a block diagram of the audio device of the present invention.
2, and the audio signal waveform S2 when the volume is reduced to 1/2 using the conventional method.
Audio signal waveform diagram S when the volume is ideally reduced to 1/2
3 and the waveform diagram of the PWM signal, Figure 5 shows the 3-bit P
It is a chart showing CM data and 2-bit PCM data obtained by halving the 3-bit data. 10...Bus line, 11...System controller, 14...Audio source, 15a-1
5d...Digital amplifier, 15-1...PCM.
PWM conversion section.
Claims (1)
えた操作ユニツトと、オーデイオソースをそれぞ
れバスに接続し、コントローラよりバスを介して
操作情報をオーデイオソースに転送するオーデイ
オ装置において、 複数のチヤンネルのそれぞれに設けられたデジ
タルアンプをバスに接続すると共に、 オーデイオソースから出力されるＰＣＭ音声デ
ータを、コントローラからバスを介して送られて
くる音量調整データに基づいて所定パルス幅のＰ
ＷＭ信号に変換するＰＣＭ・ＰＷＭ変換部とＰＷ
Ｍ信号を増幅するアンプとにより前記デジタルア
ンプを構成することを特徴とするオーデイオ装置
。[Scope of Claim for Utility Model Registration] An audio device in which a controller, an operating unit including an operating member for volume adjustment, etc., and an audio source are each connected to a bus, and operating information is transferred from the controller to the audio source via the bus. , the digital amplifiers provided for each of the plurality of channels are connected to the bus, and the PCM audio data output from the audio source is controlled with a predetermined pulse width based on the volume adjustment data sent from the controller via the bus. P of
PCM/PWM converter and PW that converts to WM signal
An audio device characterized in that the digital amplifier is constituted by an amplifier that amplifies an M signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7448690U JPH0434099U (en) | 1990-07-13 | 1990-07-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7448690U JPH0434099U (en) | 1990-07-13 | 1990-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0434099U true JPH0434099U (en) | 1992-03-19 |
Family
ID=31614217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7448690U Pending JPH0434099U (en) | 1990-07-13 | 1990-07-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434099U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009010959A (en) * | 2001-02-16 | 2009-01-15 | Qualcomm Inc | Direct conversion receiver architecture |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60241330A (en) * | 1984-05-16 | 1985-11-30 | Yokogawa Hokushin Electric Corp | Digital-analog converter with auto-range function |
-
1990
- 1990-07-13 JP JP7448690U patent/JPH0434099U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60241330A (en) * | 1984-05-16 | 1985-11-30 | Yokogawa Hokushin Electric Corp | Digital-analog converter with auto-range function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009010959A (en) * | 2001-02-16 | 2009-01-15 | Qualcomm Inc | Direct conversion receiver architecture |