GB1017392A - Transistor amplifiers - Google Patents

Transistor amplifiers

Info

Publication number
GB1017392A
GB1017392A GB1233561A GB1233561A GB1017392A GB 1017392 A GB1017392 A GB 1017392A GB 1233561 A GB1233561 A GB 1233561A GB 1233561 A GB1233561 A GB 1233561A GB 1017392 A GB1017392 A GB 1017392A
Authority
GB
United Kingdom
Prior art keywords
transistors
resistances
resistors
circuits
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.)
Expired
Application number
GB1233561A
Inventor
Dennis Grant Skinner
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.)
Lucas Support Services Ltd
Original Assignee
Rotax 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 Rotax Ltd filed Critical Rotax Ltd
Priority to GB1233561A priority Critical patent/GB1017392A/en
Publication of GB1017392A publication Critical patent/GB1017392A/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
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45392—Indexing scheme relating to differential amplifiers the AAC comprising resistors in the source circuit of the AAC before the common source coupling
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45611—Indexing scheme relating to differential amplifiers the IC comprising only one input signal connection lead for one phase of the signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45644—Indexing scheme relating to differential amplifiers the LC comprising a cross coupling circuit, e.g. comprising two cross-coupled transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45718—Indexing scheme relating to differential amplifiers the LC comprising a resistor as shunt

Landscapes

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

Abstract

1,017,392. Transistor amplifying circuits. ROTAX Ltd. March 26, 1962 [April 6, 1961], No. 12335/61. Heading H3T. A long-tailed pair comprising transistors 5, 8 connected as shown in the Figure has its output impedance increased by increasing the effective impedances of resistors 3, 4, 6, 7, by connecting transistors 19, 20 of opposite conductivity type to transistors 5, 8 in the manner shown. Resistances 3, 4 and 6, 7 may be replaced by single resistances in which case a tapping of the two single resistances is connected to the bases of NPN transistors 19, 20 respectively. If the resistances of the circuits between the emitters of transistors 19, 20 and terminal 1 are slightly less or equal to the resistances of the circuits between the bases of transistors 19, 20 and terminal 1 then the effective impedances of resistors 3, 4 and 6, 7 are increased. Resistors 23, 24, 25, 26 may be omitted and capacitors 17, 18 replaced by a direct connection. Part of the emitter impedance of the long-tailed pair comprises transistor 11.
GB1233561A 1961-04-06 1961-04-06 Transistor amplifiers Expired GB1017392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1233561A GB1017392A (en) 1961-04-06 1961-04-06 Transistor amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1233561A GB1017392A (en) 1961-04-06 1961-04-06 Transistor amplifiers

Publications (1)

Publication Number Publication Date
GB1017392A true GB1017392A (en) 1966-01-19

Family

ID=10002600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1233561A Expired GB1017392A (en) 1961-04-06 1961-04-06 Transistor amplifiers

Country Status (1)

Country Link
GB (1) GB1017392A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219162A (en) * 1988-05-28 1989-11-29 Stc Plc Differential amplifier with high output impedance stage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219162A (en) * 1988-05-28 1989-11-29 Stc Plc Differential amplifier with high output impedance stage
GB2219162B (en) * 1988-05-28 1992-06-10 Stc Plc Amplifier circuit

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