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JPS5578609A - Power supply circuit for power amplifier - Google Patents

Power supply circuit for power amplifier

Info

Publication number
JPS5578609A
JPS5578609A JP15233178A JP15233178A JPS5578609A JP S5578609 A JPS5578609 A JP S5578609A JP 15233178 A JP15233178 A JP 15233178A JP 15233178 A JP15233178 A JP 15233178A JP S5578609 A JPS5578609 A JP S5578609A
Authority
JP
Japan
Prior art keywords
voltage
power
collector
diodes
power amplifier
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
JP15233178A
Other languages
Japanese (ja)
Inventor
Eisuke Nishiyama
Akio Ozawa
Masamichi Yumino
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP15233178A priority Critical patent/JPS5578609A/en
Publication of JPS5578609A publication Critical patent/JPS5578609A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0244—Stepped control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To reduce the loss of the power amplifier element and then to miniaturize the radiator by varying in sequence and steps the power voltage applied to the collector of the power transistor in accordance with the levels of the output signal voltage. CONSTITUTION:The emitters of complementary push-pull power transistors Q1 and Q2 constituting the final output step of the power amplifier are connected to the output point via emitter resistances R1 and R2, thus driving speaker RL of the common load. Then the output signal voltage of the output point is applied to comparators 1-6 to be compared with the reference voltage. And switching means SW1-SW6 are turned on when the absolute value of the input is large. At the same time, power voltage generator circuit 7 is provided to the power supply circuit, and the voltage is applied to the collector of NPN element Q1 via switches SW1-SW3 plus one-way diodes D1-D3. While the voltage passed through switches SW4- SW6 plus diodes D4-D6 is applied to the collector of PNP element Q2. Furthermore, the minimum level voltage is applied to the collectors of Q1 and Q2 via diodes D6 and D7.
JP15233178A 1978-12-08 1978-12-08 Power supply circuit for power amplifier Pending JPS5578609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15233178A JPS5578609A (en) 1978-12-08 1978-12-08 Power supply circuit for power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15233178A JPS5578609A (en) 1978-12-08 1978-12-08 Power supply circuit for power amplifier

Publications (1)

Publication Number Publication Date
JPS5578609A true JPS5578609A (en) 1980-06-13

Family

ID=15538187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15233178A Pending JPS5578609A (en) 1978-12-08 1978-12-08 Power supply circuit for power amplifier

Country Status (1)

Country Link
JP (1) JPS5578609A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778112U (en) * 1980-10-30 1982-05-14
JPS61251212A (en) * 1985-04-26 1986-11-08 建弘電子工業股ふん有限公司 Audio frequency amplifier for on-demand dynamic power

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826772U (en) * 1971-08-02 1973-03-31
JPS51132746A (en) * 1975-05-14 1976-11-18 Sansui Electric Co Amplifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826772U (en) * 1971-08-02 1973-03-31
JPS51132746A (en) * 1975-05-14 1976-11-18 Sansui Electric Co Amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778112U (en) * 1980-10-30 1982-05-14
JPS6329288Y2 (en) * 1980-10-30 1988-08-08
JPS61251212A (en) * 1985-04-26 1986-11-08 建弘電子工業股ふん有限公司 Audio frequency amplifier for on-demand dynamic power

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