JPS5937737A - 受話音量自動調節回路 - Google Patents

受話音量自動調節回路

Info

Publication number
JPS5937737A
JPS5937737A JP14620482A JP14620482A JPS5937737A JP S5937737 A JPS5937737 A JP S5937737A JP 14620482 A JP14620482 A JP 14620482A JP 14620482 A JP14620482 A JP 14620482A JP S5937737 A JPS5937737 A JP S5937737A
Authority
JP
Japan
Prior art keywords
circuit
switch
attenuation
signal
variable attenuation
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.)
Granted
Application number
JP14620482A
Other languages
English (en)
Japanese (ja)
Other versions
JPS647531B2 (enrdf_load_stackoverflow
Inventor
Tsuneaki Oka
岡　統章
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
Toshiba Corp
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
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)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (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 true JPS5937737A (ja) 1984-03-01
JPS647531B2 JPS647531B2 (enrdf_load_stackoverflow) 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_stackoverflow)

Cited By (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
EP1538743A1 (en) * 2003-11-19 2005-06-08 Kabushiki Kaisha Toshiba Amplifier

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031707U (enrdf_load_stackoverflow) * 1973-07-16 1975-04-08
JPS5582853U (enrdf_load_stackoverflow) * 1978-12-04 1980-06-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031707U (enrdf_load_stackoverflow) * 1973-07-16 1975-04-08
JPS5582853U (enrdf_load_stackoverflow) * 1978-12-04 1980-06-07

Cited By (4)

* 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
US5286311A (en) * 1989-06-09 1994-02-15 Thyssen Edelstahlwarke Ag Precipitation hardening ferritic-pearlitic steel valve
EP1538743A1 (en) * 2003-11-19 2005-06-08 Kabushiki Kaisha Toshiba Amplifier
US7123089B2 (en) 2003-11-19 2006-10-17 Kabushiki Kaisha Toshiba Power amplifier with pulse differentiating circuit

Also Published As

Publication number Publication date
JPS647531B2 (enrdf_load_stackoverflow) 1989-02-09

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