JPS56110307A - Electric power amplifier - Google Patents

Electric power amplifier

Info

Publication number
JPS56110307A
JPS56110307A JP1244080A JP1244080A JPS56110307A JP S56110307 A JPS56110307 A JP S56110307A JP 1244080 A JP1244080 A JP 1244080A JP 1244080 A JP1244080 A JP 1244080A JP S56110307 A JPS56110307 A JP S56110307A
Authority
JP
Japan
Prior art keywords
current
voltage
transistor
amplified
load
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
JP1244080A
Other languages
Japanese (ja)
Other versions
JPS6228886B2 (en
Inventor
Harushige Nakagaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1244080A priority Critical patent/JPS56110307A/en
Publication of JPS56110307A publication Critical patent/JPS56110307A/en
Publication of JPS6228886B2 publication Critical patent/JPS6228886B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Amplifiers (AREA)

Abstract

PURPOSE: To prevent occurrence of distortion of the load current, by excluding the load out of the feedback loop and applying the current to the load from the current driving source stabilized independently in accordance with the input signal.
CONSTITUTION: The working point is set for the transistor 7 by the bias voltage of the DC voltage source 14, and the DC bias current is supplied to the resistances 10 and 11 plus the diode 9 from the DC voltage source 13. The input voltage ei is amplified by the transistor 7, and the output voltage across the resistance 10 is converted into the current at the part of the resistance 11 and diode 9. This output current is inverted and amplified by the transistor 8, and the amplified current is supplied to the voice coil of the speaker 4.
COPYRIGHT: (C)1981,JPO&Japio
JP1244080A 1980-02-06 1980-02-06 Electric power amplifier Granted JPS56110307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1244080A JPS56110307A (en) 1980-02-06 1980-02-06 Electric power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1244080A JPS56110307A (en) 1980-02-06 1980-02-06 Electric power amplifier

Publications (2)

Publication Number Publication Date
JPS56110307A true JPS56110307A (en) 1981-09-01
JPS6228886B2 JPS6228886B2 (en) 1987-06-23

Family

ID=11805358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1244080A Granted JPS56110307A (en) 1980-02-06 1980-02-06 Electric power amplifier

Country Status (1)

Country Link
JP (1) JPS56110307A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02122713A (en) * 1988-10-31 1990-05-10 Matsushita Electric Ind Co Ltd Gain controller
JP2015056705A (en) * 2013-09-11 2015-03-23 オンキヨー株式会社 Amplifier for headphone and headphone reproduction device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02122713A (en) * 1988-10-31 1990-05-10 Matsushita Electric Ind Co Ltd Gain controller
JP2015056705A (en) * 2013-09-11 2015-03-23 オンキヨー株式会社 Amplifier for headphone and headphone reproduction device

Also Published As

Publication number Publication date
JPS6228886B2 (en) 1987-06-23

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