JPS55165011A - Audio control unit - Google Patents

Audio control unit

Info

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
Application number
JP7363679A
Other languages
Japanese (ja)
Inventor
Shuichi Inose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP7363679A priority Critical patent/JPS55165011A/en
Publication of JPS55165011A publication Critical patent/JPS55165011A/en
Pending legal-status Critical Current

Links

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.
JP7363679A 1979-06-11 1979-06-11 Audio control unit Pending JPS55165011A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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