GB810417A - Improvements in or relating to amplifiers employing transistors - Google Patents

Improvements in or relating to amplifiers employing transistors

Info

Publication number
GB810417A
GB810417A GB3371257A GB3371257A GB810417A GB 810417 A GB810417 A GB 810417A GB 3371257 A GB3371257 A GB 3371257A GB 3371257 A GB3371257 A GB 3371257A GB 810417 A GB810417 A GB 810417A
Authority
GB
United Kingdom
Prior art keywords
transistors
regards
circuits
parallel
stage
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
GB3371257A
Inventor
David Joseph Robert Chapman
Norman Vincent Davies
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE572476D priority Critical patent/BE572476A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3371257A priority patent/GB810417A/en
Priority to CH6529558A priority patent/CH363376A/en
Priority to FR777720A priority patent/FR1215003A/en
Publication of GB810417A publication Critical patent/GB810417A/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
    • H03F3/20—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
    • 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

Landscapes

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

Abstract

810,417. Transistor amplifiers. STANDARD TELEPHONES & CABLES Ltd. Oct. 29,1957, No. 33712/57. Class 40 (6). In a transistor amplifier the output stage comprises a plurality of pairs of transistors each connected in push-pull, with the emitter-base circuits of the transistors all arranged in series as regards the input signal currents from the preceding stage and the collector-base circuits all arranged in parallel as regards the output signal currents carried thereby. As shown a transistor amplifier comprises a first push-pull stage including transistors 7A, 7B and an output stage comprising pairs of transistors 17A, 17B and 19A, 19B respectively. The transistors in the output stage are all connected in parallel as regards the power supply from the source 5 but are arranged so that as regards the signal currents their input circuits are all effectively connected in series through capacitors 18A, 18B. Chokes 25A, 25B serve to isolate the circuits which are connected in parallel as regards the direct-current supply. Similarly the collectorbase circuits of the transistors are connected effectively in parallel by being connected to respective primary windings of the transformer 26. The collector electrodes of transistors 17A, 17B are connected to the source 5 through respective chokes 30A, 30B. Negative feedback is provided by interconnections between the collector electrodes of transistors 19A and 19B and respective emitter electrodes in the preceding stage. In order to prevent possible instability when the output of the amplifier is open-circuited a large-valued resistor 33 is connected across the secondary winding of the transformer 26.
GB3371257A 1957-10-29 1957-10-29 Improvements in or relating to amplifiers employing transistors Expired GB810417A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE572476D BE572476A (en) 1957-10-29
GB3371257A GB810417A (en) 1957-10-29 1957-10-29 Improvements in or relating to amplifiers employing transistors
CH6529558A CH363376A (en) 1957-10-29 1958-10-22 Transistor amplifier
FR777720A FR1215003A (en) 1957-10-29 1958-10-28 Amplifiers using transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3371257A GB810417A (en) 1957-10-29 1957-10-29 Improvements in or relating to amplifiers employing transistors

Publications (1)

Publication Number Publication Date
GB810417A true GB810417A (en) 1959-03-18

Family

ID=10356483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3371257A Expired GB810417A (en) 1957-10-29 1957-10-29 Improvements in or relating to amplifiers employing transistors

Country Status (4)

Country Link
BE (1) BE572476A (en)
CH (1) CH363376A (en)
FR (1) FR1215003A (en)
GB (1) GB810417A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096486A (en) * 1960-09-13 1963-07-02 Robert R Atherton Push-pull parallel operating circuit for power transmission devices
US3497820A (en) * 1966-12-27 1970-02-24 Tideland Signal Corp Two-stage power amplifier connected to autotransformer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258902B (en) * 1965-05-05 1968-01-18 Tekade Felten & Guilleaume Circuit arrangement for magnetic amplifiers working in Saettigungswinkel-control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096486A (en) * 1960-09-13 1963-07-02 Robert R Atherton Push-pull parallel operating circuit for power transmission devices
US3497820A (en) * 1966-12-27 1970-02-24 Tideland Signal Corp Two-stage power amplifier connected to autotransformer

Also Published As

Publication number Publication date
FR1215003A (en) 1960-04-13
CH363376A (en) 1962-07-31
BE572476A (en)

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