JPS5511691A - Power amplifier circuit - Google Patents

Power amplifier circuit

Info

Publication number
JPS5511691A
JPS5511691A JP8560678A JP8560678A JPS5511691A JP S5511691 A JPS5511691 A JP S5511691A JP 8560678 A JP8560678 A JP 8560678A JP 8560678 A JP8560678 A JP 8560678A JP S5511691 A JPS5511691 A JP S5511691A
Authority
JP
Japan
Prior art keywords
section
action points
class
switching
switch
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
JP8560678A
Other languages
Japanese (ja)
Inventor
Tetsushige Yamaguchi
Masateru Ikeda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8560678A priority Critical patent/JPS5511691A/en
Publication of JPS5511691A publication Critical patent/JPS5511691A/en
Pending 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 secure a highly efficient amplification for the TV video modulation signal by switching the action points of the amplifier circuit according to the sections of the input signals and then amplifying those action points. CONSTITUTION:The TV video modulation signal is applied to the base of main transistor Tr8, and the output is drawn out from the collector. Switching Tr16 plus switch 18 are provided at base bias feeder terminal 7 of Tr8 to secure switching of the action points for the amplifier. Tr8 and 16 are the NPN-type Tr's of the same conducting property. When switch 18 is turned on and off at the synchronous section 14 and video section 15 respectively of the video modulation signals, the action points of Tr8 switch the base bias between C-, A- or AB-class each. The C-class amplification is given to section 14, and section 15 is given operation of A- or AB-class featuring a high linearity. As a result, the operation is secured at a high output point, thus ensuring a highly efficient power amplification.
JP8560678A 1978-07-12 1978-07-12 Power amplifier circuit Pending JPS5511691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8560678A JPS5511691A (en) 1978-07-12 1978-07-12 Power amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8560678A JPS5511691A (en) 1978-07-12 1978-07-12 Power amplifier circuit

Publications (1)

Publication Number Publication Date
JPS5511691A true JPS5511691A (en) 1980-01-26

Family

ID=13863479

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8560678A Pending JPS5511691A (en) 1978-07-12 1978-07-12 Power amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5511691A (en)

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