JPS5857132U - Analog to digital converter for audio signals - Google Patents
Analog to digital converter for audio signalsInfo
- Publication number
- JPS5857132U JPS5857132U JP15147081U JP15147081U JPS5857132U JP S5857132 U JPS5857132 U JP S5857132U JP 15147081 U JP15147081 U JP 15147081U JP 15147081 U JP15147081 U JP 15147081U JP S5857132 U JPS5857132 U JP S5857132U
- Authority
- JP
- Japan
- Prior art keywords
- parallel data
- data signal
- analog
- output
- digital converter
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はオーディオ信号のＡ／Ｄ変換装置の従来例の構
成を示すブロック図である。第２図は同じく他の従来例
を示すブロック図である。第３図は本考案に係るオーデ
ィオ信号のＡ／Ｄ変換装置の原理的な構成を示すブロッ
ク図である。第４図は本考案の具体的な実施例を示す回
路図である。
１１・・・・・・電圧比較器、１２・・・・・・制御論
理回路、１３・・・・・−Ｄ／Ａ変換器、Ｒ３・・・・
・・基準電圧源、ＡＴＴｌ、ＡＴＴ２．−、ＡＴＴｎ−
−−−−−７ツテネータ、Ｓ□、Ｓ２．＊＊＊、 Ｓｎ
ｅ＋＋曲スイッチ、↑ｒ、、 Ｔｒ２． Ｔｒ３゜Ｔｒ
４・・・・・・スイッチングトランジスタ、Ｒ□ｉｓ
Ｒ１２ｓＲ，、Ｒ□４ｓ Ｒ２１１Ｒ２２１Ｒ２３ｅ
Ｒ２４・・面抵抗器、Ａ１゜Ａ２． Ａ３． Ａ４・・
・・・・バッファ増幅器。
補正 昭５７． ８．３１
実用新案登録請求の範囲を次のように補正する。
Ｏ実用新案登録請求の範囲
パラレルデータ信号により客スイッチが作動して各減衰
量が切換えられ、最少減衰量の対数値に対して２”（た
だし、ｎは正の整数）倍の減衰量の対数値を有するｎ種
類のアッテネータが基準電圧源が縦続接続されて成り、
該基準電圧源からの出力を上記パラレルデータ信号に応
じて減衰せしめた基準電圧を出力するデジタル・アナロ
グ変換器と、アナログ入力オーディオ信号と上記基準電
圧とを比較する電圧比較器と、該電圧比較器からの比較
出力により作動してパラレルデータ信号を出力する制御
論理回路とを備え、アナログ入力オーディオ信号の信号
レベルを対数圧縮したパラレルデータ信号に変換するア
ナログ・デジタル変換装置。FIG. 1 is a block diagram showing the configuration of a conventional A/D converter for audio signals. FIG. 2 is a block diagram showing another conventional example. FIG. 3 is a block diagram showing the basic configuration of an audio signal A/D converter according to the present invention. FIG. 4 is a circuit diagram showing a specific embodiment of the present invention. 11...Voltage comparator, 12...Control logic circuit, 13...-D/A converter, R3...
...Reference voltage source, ATTl, ATT2. -, ATTn-
-----7 Tsutenator, S□, S2. ＊＊＊, Sn
e++ song switch, ↑r,, Tr2. Tr3゜Tr
4...Switching transistor, R□is
R12sR,, R□4s R211R221R23e
R24...Surface resistor, A1゜A2. A3. A4...
...Buffer amplifier. Correction 1984. 8.31 The scope of claims for utility model registration is amended as follows. O Utility Model Registration Claims A customer switch is activated by the parallel data signal to switch each attenuation amount, and the attenuation amount is set to 2" (where n is a positive integer) times the logarithm of the minimum attenuation amount. N types of attenuators having numerical values are connected in series with a reference voltage source,
a digital-to-analog converter that outputs a reference voltage obtained by attenuating the output from the reference voltage source according to the parallel data signal; a voltage comparator that compares the analog input audio signal with the reference voltage; and the voltage comparator. an analog-to-digital conversion device that converts the signal level of an analog input audio signal into a logarithmically compressed parallel data signal, and includes a control logic circuit that is activated by a comparison output from the device and outputs a parallel data signal.
Claims (1)
量が切換えられ、最少減衰比の対数値に対して２“（た
だし、ｎは正の整数）倍の減衰比の対数値を有するｎ種
類のアンテネータが基準電源に縦続接続されて晟り、該
基準電圧源からの出力を上記パラレルデータ信号に応じ
て減衰せしめた基準電圧を出力するデジタル・アナログ
変換器と、アナログ入力オーディオ信号と上記基準電圧
とを比較する電圧比較器と、該電圧比較器からの比較出
力により作動してパラレルデータ信号を出力する制御論
理回路とを備え、アナログ入力オーディオ信号の信号レ
ベルを対数圧縮したパラレルデータ信号に変換するアナ
ログ・デジタル変換装置。Each switch is actuated by a parallel data signal to switch each attenuation amount, and n types of antennas each having a logarithmic value of the attenuation ratio that is 2" (however, n is a positive integer) times the logarithmic value of the minimum attenuation ratio. are cascade-connected to a reference power supply and output a reference voltage obtained by attenuating the output from the reference voltage source in accordance with the parallel data signal; and a control logic circuit that is activated by the comparison output from the voltage comparator to output a parallel data signal, and converts the signal level of an analog input audio signal into a logarithmically compressed parallel data signal. Analog-to-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15147081U JPS5857132U (en) | 1981-10-14 | 1981-10-14 | Analog to digital converter for audio signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15147081U JPS5857132U (en) | 1981-10-14 | 1981-10-14 | Analog to digital converter for audio signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5857132U true JPS5857132U (en) | 1983-04-18 |
Family
ID=29944154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15147081U Pending JPS5857132U (en) | 1981-10-14 | 1981-10-14 | Analog to digital converter for audio signals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5857132U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226817A (en) * | 1988-12-29 | 1990-09-10 | American Teleph & Telegr Co <Att> | Signal converter and method of converting signal |
| WO2001059933A1 (en) * | 2000-02-14 | 2001-08-16 | Sumitomo Metal Industries, Ltd. | Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity |
-
1981
- 1981-10-14 JP JP15147081U patent/JPS5857132U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02226817A (en) * | 1988-12-29 | 1990-09-10 | American Teleph & Telegr Co <Att> | Signal converter and method of converting signal |
| WO2001059933A1 (en) * | 2000-02-14 | 2001-08-16 | Sumitomo Metal Industries, Ltd. | Logarithmic a/d converter, method of logarithmic a/d conversion, logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity |
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