GB1145837A - A.c. amplifiers - Google Patents

A.c. amplifiers

Info

Publication number
GB1145837A
GB1145837A GB2582865A GB2582865A GB1145837A GB 1145837 A GB1145837 A GB 1145837A GB 2582865 A GB2582865 A GB 2582865A GB 2582865 A GB2582865 A GB 2582865A GB 1145837 A GB1145837 A GB 1145837A
Authority
GB
United Kingdom
Prior art keywords
transistor
base
load
drive
resistor
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.)
Expired
Application number
GB2582865A
Inventor
Derek Stanley Adams
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Joseph Lucas Industries 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 Lucas Industries Ltd, Joseph Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB2582865A priority Critical patent/GB1145837A/en
Publication of GB1145837A publication Critical patent/GB1145837A/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
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • 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
    • H03F3/3083—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type

Landscapes

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

Abstract

1,145,837. Transistor amplifying circuits. JOSEPH LUCAS (INDUSTRIES) Ltd. 16 May, 1966 [18 June, 1965], No. 25828/65. Heading H3T. A push-pull amplifier is provided with means limiting the instantaneous value of the drive in the event of the impedance of the load falling below a predetermined level. Signal is applied to the base of transistor 12 which with transistor 18, the base of which is earthed, constitutes an emitter coupled pair coupled by resistor 13. Transistors 12, 18 drive via transformer 16 the base emitter paths of a pair of series-connected output transistors 23, 24 operating in class B into a common load 30 via transformers 27, 29. The maximum drive current is limited by common resistor 13. In addition a voltage proportional to that across the load 30 is developed across a tertiary winding 31 on the output transformer and is rectified by bridge rectifier 32, being applied to the base/ emitter circuit of transistor 18 via resistor 33, in such a manner that the drive is limited if the impedance of the load 30 is unduly reduced.
GB2582865A 1965-06-18 1965-06-18 A.c. amplifiers Expired GB1145837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2582865A GB1145837A (en) 1965-06-18 1965-06-18 A.c. amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2582865A GB1145837A (en) 1965-06-18 1965-06-18 A.c. amplifiers

Publications (1)

Publication Number Publication Date
GB1145837A true GB1145837A (en) 1969-03-19

Family

ID=10234000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2582865A Expired GB1145837A (en) 1965-06-18 1965-06-18 A.c. amplifiers

Country Status (1)

Country Link
GB (1) GB1145837A (en)

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