JPS57212811A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS57212811A
JPS57212811A JP56097700A JP9770081A JPS57212811A JP S57212811 A JPS57212811 A JP S57212811A JP 56097700 A JP56097700 A JP 56097700A JP 9770081 A JP9770081 A JP 9770081A JP S57212811 A JPS57212811 A JP S57212811A
Authority
JP
Japan
Prior art keywords
value
input signal
signal voltage
exceeds
switching element
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
JP56097700A
Other languages
Japanese (ja)
Inventor
Naritake Kashiwagi
Kenjiro Endo
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 JP56097700A priority Critical patent/JPS57212811A/en
Priority to US06/331,273 priority patent/US4472687A/en
Priority to EP81110608A priority patent/EP0054943B2/en
Priority to DE8181110608T priority patent/DE3171279D1/en
Priority to CA000393088A priority patent/CA1181139A/en
Publication of JPS57212811A publication Critical patent/JPS57212811A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To decrease the loss of a switching element itself, by changing an output voltage of a smoothing circuit in response to an input signal voltage and compulsively increasing the power supply voltage of an output amplifying element when the differentiation value of the input signal voltage exceeds a prescribed value.
CONSTITUTION: The 1st control circuit 23 compares an input signal voltage applied to an input terminal 11 with a feedback voltage proportional to an output voltage of a smoothing circuit 18 fed back via feedback resistors 21 and 22, and when the absolute value of the difference of the both exceeds a prescribed value, the 1st switching element 13 is conducted. The 2nd control circuit 24 conducts the 2nd switching element 14 for a prescribed time when the differentiation value of the input signal voltage applied to the input terminal 11 exceeds a specified value.
COPYRIGHT: (C)1982,JPO&Japio
JP56097700A 1980-12-24 1981-06-24 Power amplifier Pending JPS57212811A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP56097700A JPS57212811A (en) 1981-06-24 1981-06-24 Power amplifier
US06/331,273 US4472687A (en) 1980-12-24 1981-12-16 Audio power amplifier for supplying electric power to a load by switching of power supply voltage
EP81110608A EP0054943B2 (en) 1980-12-24 1981-12-18 Power amplifier for supplying electric power to a load by switching of power supply voltage
DE8181110608T DE3171279D1 (en) 1980-12-24 1981-12-18 Power amplifier for supplying electric power to a load by switching of power supply voltage
CA000393088A CA1181139A (en) 1980-12-24 1981-12-23 Power amplifier for supplying electric power to a load by switching of power supply voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56097700A JPS57212811A (en) 1981-06-24 1981-06-24 Power amplifier

Publications (1)

Publication Number Publication Date
JPS57212811A true JPS57212811A (en) 1982-12-27

Family

ID=14199198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56097700A Pending JPS57212811A (en) 1980-12-24 1981-06-24 Power amplifier

Country Status (1)

Country Link
JP (1) JPS57212811A (en)

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