GB777203A - Improvements in or relating to low frequency transistor amplifiers - Google Patents

Improvements in or relating to low frequency transistor amplifiers

Info

Publication number
GB777203A
GB777203A GB32629/55A GB3262955A GB777203A GB 777203 A GB777203 A GB 777203A GB 32629/55 A GB32629/55 A GB 32629/55A GB 3262955 A GB3262955 A GB 3262955A GB 777203 A GB777203 A GB 777203A
Authority
GB
United Kingdom
Prior art keywords
coil
transistor
relating
low frequency
frequency transistor
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
GB32629/55A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB777203A publication Critical patent/GB777203A/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
    • H03F3/30—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
    • H03F3/3086—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal
    • H03F3/3098—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal using a transformer as phase splitter

Landscapes

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

Abstract

777,203. Transistor amplifying circuits. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. Nov. 15, 1955 [Nov. 22, 1954], No. 32629/55. Class 40(6) In a push-pull amplifier in which the load is an operating coil such as a loud-speaker, the coil is connected directly to the transistor. By employing a centre-tapped voice coil 3, Fig. 2, a coupling transformer may be dispensed with. The supply 10 is connected directly to the centre tap 7 of the coil 3 which operates the loudspeaker 4. In a modification, Fig. 5, the operating coils, 3a, 3b are separated for D.C., the coil 3a being transferred to the emitter side of transistor 1. The load 3 may be a relay or motor.
GB32629/55A 1954-11-22 1955-11-15 Improvements in or relating to low frequency transistor amplifiers Expired GB777203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1115026T 1954-11-22

Publications (1)

Publication Number Publication Date
GB777203A true GB777203A (en) 1957-06-19

Family

ID=9628674

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32629/55A Expired GB777203A (en) 1954-11-22 1955-11-15 Improvements in or relating to low frequency transistor amplifiers

Country Status (2)

Country Link
FR (1) FR1115026A (en)
GB (1) GB777203A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088548B (en) * 1958-07-16 1960-09-08 Standard Elektrik Lorenz Ag Circuit arrangement for intrinsically safe electro-acoustic communication systems with loudspeakers and amplifiers for rooms at risk of explosion
DE1140978B (en) * 1958-05-28 1962-12-13 Rca Corp Audio frequency amplifier with two push-pull transistors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056931A (en) * 1958-05-07 1962-10-02 Itt Transistorized generator of telephone ringing current

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140978B (en) * 1958-05-28 1962-12-13 Rca Corp Audio frequency amplifier with two push-pull transistors
DE1088548B (en) * 1958-07-16 1960-09-08 Standard Elektrik Lorenz Ag Circuit arrangement for intrinsically safe electro-acoustic communication systems with loudspeakers and amplifiers for rooms at risk of explosion

Also Published As

Publication number Publication date
FR1115026A (en) 1956-04-18

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