GB1003288A - Improvements relating to transistor circuits - Google Patents

Improvements relating to transistor circuits

Info

Publication number
GB1003288A
GB1003288A GB1974762A GB1974762A GB1003288A GB 1003288 A GB1003288 A GB 1003288A GB 1974762 A GB1974762 A GB 1974762A GB 1974762 A GB1974762 A GB 1974762A GB 1003288 A GB1003288 A GB 1003288A
Authority
GB
United Kingdom
Prior art keywords
transistor
circuit
range
tuned
band
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
GB1974762A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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 Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1003288A publication Critical patent/GB1003288A/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
    • H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
    • H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
    • H03F3/191—Tuned amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/12—Transference of modulation from one carrier to another, e.g. frequency-changing by means of semiconductor devices having more than two electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/534—Transformer coupled at the input of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/541—Transformer coupled at the output of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/72—Indexing scheme relating to amplifiers the amplifier stage being a common gate configuration MOSFET

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Amplifiers (AREA)
  • Filters And Equalizers (AREA)

Abstract

1,003,288. Transistor high-frequency amplifyirig and mixer circuits. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. May 23, 1962 [June 2, 1961], No. 19747/62. Heading H3T. In a transistor high-frequency amplifier or mixer stage capable of being tuned over a wide range of frequencies, the input electrode of the transistor is coupled to the output of a preceding oscillatory circuit or band-pass filter by means of a series inductance whose reactance is small at the lower end of the range of frequencies over which the circuit is operative and greater at the higher end of the range so as to maintain the input impedance presented by the transistor to the oscillatory circuit or band-pass filter substantially constant over the whole frequency range. As shown in a mixer stage for a television receiver covering both bands I and III, radiofrequency tuning coils 1, 3 may either be permeability-tuned or switched-tuned to enable the circuit to cover the entire frequency band. At the upper end of the frequency band the transistor presents a low input impedance at its emitter; however, by means of inductor 7 the load presented to the output of the bandpass filter remains substantially constant so enabling the desired bandwidth in the filter to be maintained. The circuit is not limited to the grounded-base configuration shown.
GB1974762A 1961-06-02 1962-05-23 Improvements relating to transistor circuits Expired GB1003288A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET20238A DE1177219B (en) 1961-06-02 1961-06-02 Amplifier or mixer with transistor

Publications (1)

Publication Number Publication Date
GB1003288A true GB1003288A (en) 1965-09-02

Family

ID=7549629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1974762A Expired GB1003288A (en) 1961-06-02 1962-05-23 Improvements relating to transistor circuits

Country Status (2)

Country Link
DE (1) DE1177219B (en)
GB (1) GB1003288A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151424A (en) * 1983-12-16 1985-07-17 Telefunken Electronic Gmbh Mixer
WO2012098401A1 (en) 2011-01-20 2012-07-26 Cadbury Uk Limited Comestible products, apparatus and methods for production thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3345496C2 (en) * 1983-12-16 1986-01-30 Telefunken electronic GmbH, 7100 Heilbronn Selective amplifier stage
US5276404A (en) * 1992-07-13 1994-01-04 Cybex Corporation Constant current video amplifier

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736014C (en) * 1938-07-06 1943-06-04 Hans Grimm Knitted or warp-knitted single or double-layer pneumatic tire insert

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151424A (en) * 1983-12-16 1985-07-17 Telefunken Electronic Gmbh Mixer
US4684833A (en) * 1983-12-16 1987-08-04 Telefunken Electronic Gmbh Mixer stage
WO2012098401A1 (en) 2011-01-20 2012-07-26 Cadbury Uk Limited Comestible products, apparatus and methods for production thereof

Also Published As

Publication number Publication date
DE1177219B (en) 1964-09-03

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