JPS5539405A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS5539405A
JPS5539405A JP10029578A JP10029578A JPS5539405A JP S5539405 A JPS5539405 A JP S5539405A JP 10029578 A JP10029578 A JP 10029578A JP 10029578 A JP10029578 A JP 10029578A JP S5539405 A JPS5539405 A JP S5539405A
Authority
JP
Japan
Prior art keywords
amplifier
power
output
voltage
terminal
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
JP10029578A
Other languages
Japanese (ja)
Other versions
JPS6031367B2 (en
Inventor
Shinya Sano
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10029578A priority Critical patent/JPS6031367B2/en
Publication of JPS5539405A publication Critical patent/JPS5539405A/en
Publication of JPS6031367B2 publication Critical patent/JPS6031367B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To realize a high-efficiency A-class amplifier in which the 1st step of the 2nd amplifier by using the 2nd amplifier which supplies the power for signal amplification as the vltage follower of gain 1 and then driving the voltage follower by the output difference of the 1st amplifier. CONSTITUTION:The 1st amplifier 1, which amplifies the input signal sent from terminal 5 and delivers it to terminal 40, receives the supply of the power at its output transistors 26 and 27 from power source 2 the middle point of which is floated with a comparatively low level of the voltage. Amplifier 1 features the conventional constitution excepting the fact that bias circuits 82 and 83 are incorporated to current sources 55 and 56 of 2nd amplifier 3. The power is supplied to amplifier 3 from power source 4 the middle point of which is earthed with a high level of voltage. Differential amplifiers 79 and 80 receive the output of amplifier 1 and drive output transistors 62 and 63 of amplifier 3 to vary the intermediate potential of source 2 of amplifier 1 in accordance with the output of amplifier 1.
JP10029578A 1978-08-16 1978-08-16 power amplifier Expired JPS6031367B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10029578A JPS6031367B2 (en) 1978-08-16 1978-08-16 power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10029578A JPS6031367B2 (en) 1978-08-16 1978-08-16 power amplifier

Publications (2)

Publication Number Publication Date
JPS5539405A true JPS5539405A (en) 1980-03-19
JPS6031367B2 JPS6031367B2 (en) 1985-07-22

Family

ID=14270174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10029578A Expired JPS6031367B2 (en) 1978-08-16 1978-08-16 power amplifier

Country Status (1)

Country Link
JP (1) JPS6031367B2 (en)

Also Published As

Publication number Publication date
JPS6031367B2 (en) 1985-07-22

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