JPS55145410A - Power amplifying circuit - Google Patents

Power amplifying circuit

Info

Publication number
JPS55145410A
JPS55145410A JP5252279A JP5252279A JPS55145410A JP S55145410 A JPS55145410 A JP S55145410A JP 5252279 A JP5252279 A JP 5252279A JP 5252279 A JP5252279 A JP 5252279A JP S55145410 A JPS55145410 A JP S55145410A
Authority
JP
Japan
Prior art keywords
current
elements
accordance
base
bases
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
JP5252279A
Other languages
Japanese (ja)
Other versions
JPS6212686B2 (en
Inventor
Tetsuo Yoshida
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP5252279A priority Critical patent/JPS55145410A/en
Publication of JPS55145410A publication Critical patent/JPS55145410A/en
Publication of JPS6212686B2 publication Critical patent/JPS6212686B2/ja
Granted 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
    • H03F3/217—Class D power amplifiers; Switching amplifiers

Landscapes

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

Abstract

PURPOSE:To improve the output linearity to the power voltage without giving the modulation to the exciting step but by obtaining the automatic control for the base driving current within the modulated power amplifying circuit and in accordance with the load current. CONSTITUTION:With supply of the square wave signal, the current of the reverse phase is supplied to the bases of switching elements 103 and 104 via the secondary winding of pulse transformer 102. Then the collector current is changed into the voltage via resistances 107 and 108 to be then applied to the bases of transistors 109 and 110 for the switch ON. The collector resistance varies in accordance with the output current of elements 103 and 104, and the base current proportional to the output current is applied to elements 109 and 110. The backward base bias gives the instantaneous OFF to elements 103 and 104 which are given via diodes 111 and 112. Thus the signal modulated linearly is delivered through T-shaped matching circuit 115 and in accordance with the positive voltage applied to modulati signal terminal 113. In such way, the base driving current is controlled automatically to obtain the steady operation with the good modulating linearity and high efficiency.
JP5252279A 1979-05-01 1979-05-01 Power amplifying circuit Granted JPS55145410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5252279A JPS55145410A (en) 1979-05-01 1979-05-01 Power amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5252279A JPS55145410A (en) 1979-05-01 1979-05-01 Power amplifying circuit

Publications (2)

Publication Number Publication Date
JPS55145410A true JPS55145410A (en) 1980-11-13
JPS6212686B2 JPS6212686B2 (en) 1987-03-20

Family

ID=12917068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5252279A Granted JPS55145410A (en) 1979-05-01 1979-05-01 Power amplifying circuit

Country Status (1)

Country Link
JP (1) JPS55145410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103107784A (en) * 2011-11-09 2013-05-15 中国科学院微电子研究所 D-type radio-frequency power amplifying circuits

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825471A (en) * 1971-08-04 1973-04-03
JPS536819A (en) * 1976-07-08 1978-01-21 Meidensha Electric Mfg Co Ltd Transistor chopper device for electric motor vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4825471A (en) * 1971-08-04 1973-04-03
JPS536819A (en) * 1976-07-08 1978-01-21 Meidensha Electric Mfg Co Ltd Transistor chopper device for electric motor vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103107784A (en) * 2011-11-09 2013-05-15 中国科学院微电子研究所 D-type radio-frequency power amplifying circuits

Also Published As

Publication number Publication date
JPS6212686B2 (en) 1987-03-20

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