JPS647531B2 - - Google Patents

Info

Publication number
JPS647531B2
JPS647531B2 JP14620482A JP14620482A JPS647531B2 JP S647531 B2 JPS647531 B2 JP S647531B2 JP 14620482 A JP14620482 A JP 14620482A JP 14620482 A JP14620482 A JP 14620482A JP S647531 B2 JPS647531 B2 JP S647531B2
Authority
JP
Japan
Prior art keywords
circuit
attenuation
signal
switch
volume adjustment
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.)
Expired
Application number
JP14620482A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5937737A (ja
Inventor
Tsuneaki Oka
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP14620482A priority Critical patent/JPS5937737A/ja
Publication of JPS5937737A publication Critical patent/JPS5937737A/ja
Publication of JPS647531B2 publication Critical patent/JPS647531B2/ja
Granted 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
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)
JP14620482A 1982-08-25 1982-08-25 受話音量自動調節回路 Granted JPS5937737A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14620482A JPS5937737A (ja) 1982-08-25 1982-08-25 受話音量自動調節回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14620482A JPS5937737A (ja) 1982-08-25 1982-08-25 受話音量自動調節回路

Publications (2)

Publication Number Publication Date
JPS5937737A JPS5937737A (ja) 1984-03-01
JPS647531B2 true JPS647531B2 (enrdf_load_html_response) 1989-02-09

Family

ID=15402472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14620482A Granted JPS5937737A (ja) 1982-08-25 1982-08-25 受話音量自動調節回路

Country Status (1)

Country Link
JP (1) JPS5937737A (enrdf_load_html_response)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221373A (en) * 1989-06-09 1993-06-22 Thyssen Edelstahlwerke Ag Internal combustion engine valve composed of precipitation hardening ferritic-pearlitic steel
JP4707319B2 (ja) 2003-11-19 2011-06-22 株式会社東芝 パルス電力増幅器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031707U (enrdf_load_html_response) * 1973-07-16 1975-04-08
JPS5714443Y2 (enrdf_load_html_response) * 1978-12-04 1982-03-25

Also Published As

Publication number Publication date
JPS5937737A (ja) 1984-03-01

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