JPS55165011A - Audio control unit - Google Patents
Audio control unitInfo
- Publication number
- JPS55165011A JPS55165011A JP7363679A JP7363679A JPS55165011A JP S55165011 A JPS55165011 A JP S55165011A JP 7363679 A JP7363679 A JP 7363679A JP 7363679 A JP7363679 A JP 7363679A JP S55165011 A JPS55165011 A JP S55165011A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sound
- input
- circuit
- amplified
- 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
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000010355 oscillation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
- H03G3/24—Control dependent upon ambient noise level or sound level
Landscapes
- Control Of Amplification And Gain Control (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:To increase the reliability of system by taking the sound as the communication medium, by amplifying the sound after conversion it into electric signal, selecting the detection timing of the electric signal resulting from the sound, and holding the amplified signal. CONSTITUTION:The oscillation by sound is converted into electric signal at the acoustic-electric converter M and input to the amplifier AMP and amplified to the level suitable for the signal processing at the unit AMP. The amplified signal is converted into digital signal at the A/D converter ADC and input to the buffer circuit LH providing the latch function. The input timing of signal from the convertor ADC is controlled at the circuit LH with the signal ST. For example, the input gate is opened in the timing adjusted not to take the sound during the self-sounding, and the data is written in the circuit LH. Further, the output gate of the circuit LH is open with the signal CS, and the noise level signal in digital conversion is input to CPU for processing. This detection timing can easily be obtained with the operation state of the self-sound unit in CPU and the mode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7363679A JPS55165011A (en) | 1979-06-11 | 1979-06-11 | Audio control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7363679A JPS55165011A (en) | 1979-06-11 | 1979-06-11 | Audio control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55165011A true JPS55165011A (en) | 1980-12-23 |
Family
ID=13523983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7363679A Pending JPS55165011A (en) | 1979-06-11 | 1979-06-11 | Audio control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55165011A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103384152A (en) * | 2012-05-03 | 2013-11-06 | 联发科技(新加坡)私人有限公司 | Analog-digital converter, analog-digital conversion method and integrated circuit chip |
-
1979
- 1979-06-11 JP JP7363679A patent/JPS55165011A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103384152A (en) * | 2012-05-03 | 2013-11-06 | 联发科技(新加坡)私人有限公司 | Analog-digital converter, analog-digital conversion method and integrated circuit chip |
CN103384152B (en) * | 2012-05-03 | 2016-11-23 | 联发科技(新加坡)私人有限公司 | Analog-digital converter, D conversion method and IC chip |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5286706A (en) | Key telephone receiver for audio sound response | |
DE59204944D1 (en) | Hearing aid | |
JPS55165011A (en) | Audio control unit | |
JPS55143476A (en) | Composing method for ultrasonic-wave opening surface | |
JPS5558808A (en) | Magnetic recording and reproducing unit | |
JPS5632859A (en) | Pcm repeater | |
JPS51123546A (en) | Power amplifier | |
JPS57203295A (en) | Digital recorder | |
JPS5715205A (en) | Tape recorder | |
SU532123A1 (en) | Device for suppressing phonogram noise | |
JPS5689196A (en) | Microphone device | |
JPS5440016A (en) | Fail soft receiving high frequency amplifier | |
JPS5826218U (en) | equalizer device | |
JPS6464170A (en) | Signal recording and reproducing device | |
JPS5760553A (en) | Producing device of muting signal in recording system | |
JPS5782215A (en) | Dropout compensation circuit | |
KR940003333A (en) | Environmental Noise Reduction Device of Camcorder | |
JPS5353203A (en) | Amplifier | |
JPS6455784A (en) | Digital audio tape recorder | |
JPS5945583U (en) | Receiving signal detection device | |
JPH0268365U (en) | ||
JPS53139987A (en) | Monolithic impedance converting circuit | |
JPS5629816A (en) | Magnetic recording and reproduction unit | |
JPS57182245A (en) | Input and output system for voice | |
JPS57166589A (en) | Electronic voice timepiece |