JPS57106204A - Power amplifying device for musical instrument - Google Patents

Power amplifying device for musical instrument

Info

Publication number
JPS57106204A
JPS57106204A JP55182414A JP18241480A JPS57106204A JP S57106204 A JPS57106204 A JP S57106204A JP 55182414 A JP55182414 A JP 55182414A JP 18241480 A JP18241480 A JP 18241480A JP S57106204 A JPS57106204 A JP S57106204A
Authority
JP
Japan
Prior art keywords
output
amplifier
voltage
power source
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.)
Pending
Application number
JP55182414A
Other languages
Japanese (ja)
Inventor
Masashi Shibahara
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.)
NIHON HAMONDO KK
NIPPON HAMONDO KK
Original Assignee
NIHON HAMONDO KK
NIPPON HAMONDO KK
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 NIHON HAMONDO KK, NIPPON HAMONDO KK filed Critical NIHON HAMONDO KK
Priority to JP55182414A priority Critical patent/JPS57106204A/en
Publication of JPS57106204A publication Critical patent/JPS57106204A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrophonic Musical Instruments (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE: To use effectively a maximum power capacity of the power source device, by supplying a power source voltage corresponding to a load impedance to an amplifier.
CONSTITUTION: A load Z is connected to a power amplifier A1, and the supply current of the load Z is detected as a drop voltage by a resistance R1. The difference between drop voltages V1 and V2 of resistances R1 and R2 is detected by a differential amplifier A2 to obtain an signal output corresponding to load impedance fluctuation. This signal output is converted to a DC by the first rectifying device A3 and is applied to a gate device G. An output voltage VO of the amplifier A1 is converted to a DC by the second rectifying device A4 and is applied to the gate G. The gate device G controls the conduction of the output of the second rectifying device A4 by the first rectifying device A3 to output a control voltage CG1 of a current device PS. The current device PS modulates the pulse width of the signal from a high frequency oscillator PG by a pulse width control device PW to control output power source voltages +B and -B.
COPYRIGHT: (C)1982,JPO&Japio
JP55182414A 1980-12-22 1980-12-22 Power amplifying device for musical instrument Pending JPS57106204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182414A JPS57106204A (en) 1980-12-22 1980-12-22 Power amplifying device for musical instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182414A JPS57106204A (en) 1980-12-22 1980-12-22 Power amplifying device for musical instrument

Publications (1)

Publication Number Publication Date
JPS57106204A true JPS57106204A (en) 1982-07-02

Family

ID=16117867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182414A Pending JPS57106204A (en) 1980-12-22 1980-12-22 Power amplifying device for musical instrument

Country Status (1)

Country Link
JP (1) JPS57106204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014529975A (en) * 2011-09-06 2014-11-13 サムスン エレクトロニクスカンパニー リミテッド Audio signal processing method and audio signal processing apparatus using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014529975A (en) * 2011-09-06 2014-11-13 サムスン エレクトロニクスカンパニー リミテッド Audio signal processing method and audio signal processing apparatus using the same

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