JPS55150604A - Power amplifier - Google Patents

Power amplifier

Info

Publication number
JPS55150604A
JPS55150604A JP5899879A JP5899879A JPS55150604A JP S55150604 A JPS55150604 A JP S55150604A JP 5899879 A JP5899879 A JP 5899879A JP 5899879 A JP5899879 A JP 5899879A JP S55150604 A JPS55150604 A JP S55150604A
Authority
JP
Japan
Prior art keywords
circuit
class
performs
rate
emitter
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
JP5899879A
Other languages
Japanese (ja)
Inventor
Tatsuya Nishizawa
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.)
TRIO KENWOOD CORP
Kenwood KK
Original Assignee
TRIO KENWOOD CORP
Kenwood 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 TRIO KENWOOD CORP, Kenwood KK filed Critical TRIO KENWOOD CORP
Priority to JP5899879A priority Critical patent/JPS55150604A/en
Publication of JPS55150604A publication Critical patent/JPS55150604A/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
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage
    • H03F3/3077—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage using Darlington transistors

Landscapes

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

Abstract

PURPOSE:To improve a through rate characteristics by driving the output stage, which performs the class B operation, of a power amplifying circuit by a transistor which constitutes the emitter-grounded circuit which performs the class A push-pull operation. CONSTITUTION:Impedance of the output stage of the class B operation at the view from the A part of power amplifying circuit 2 lowers the value according to frequency increment of the input signal due to the influence of the cutoff frequency of transistors (TRs)22 and 23 of the final stage, and the simplified equivalent circuit becomes a parallel circuit of a resistance and a capacity; and when a unit current is flowed to drive it at time t0, the output voltage increases in exponential function, and thus, it is detected that the through rate characteristic of circuit 2 is dependent upon instantaneous current supply capability from the preceding stage. Therefore, a high through rate of approximately 1kV/muV can be obtained by driving circuit 2 by TR18, 19 which constitute the emitter-grounded circuit which performs the class A push-pull operation. In this case, since circuit 2 is weak for DC drift and a bias circuit is required, private voltage amplifying circuit 1 is connected.
JP5899879A 1979-05-14 1979-05-14 Power amplifier Pending JPS55150604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5899879A JPS55150604A (en) 1979-05-14 1979-05-14 Power amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5899879A JPS55150604A (en) 1979-05-14 1979-05-14 Power amplifier

Publications (1)

Publication Number Publication Date
JPS55150604A true JPS55150604A (en) 1980-11-22

Family

ID=13100516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5899879A Pending JPS55150604A (en) 1979-05-14 1979-05-14 Power amplifier

Country Status (1)

Country Link
JP (1) JPS55150604A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710977A1 (en) * 1994-11-04 1996-05-08 Hitachi, Ltd. Surface treatment method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6231777B1 (en) 1994-11-01 2001-05-15 Hitachi, Ltd. Surface treatment method and system
EP0710977A1 (en) * 1994-11-04 1996-05-08 Hitachi, Ltd. Surface treatment method and system

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