GB1028332A - Improvements relating to variable gain transistor amplifiers - Google Patents

Improvements relating to variable gain transistor amplifiers

Info

Publication number
GB1028332A
GB1028332A GB641162A GB641162A GB1028332A GB 1028332 A GB1028332 A GB 1028332A GB 641162 A GB641162 A GB 641162A GB 641162 A GB641162 A GB 641162A GB 1028332 A GB1028332 A GB 1028332A
Authority
GB
United Kingdom
Prior art keywords
common
stage
transistor
base
emitter
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
GB641162A
Inventor
Andrzey Roman Dabrowa
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB641162A priority Critical patent/GB1028332A/en
Publication of GB1028332A publication Critical patent/GB1028332A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier

Landscapes

  • Amplifiers (AREA)

Abstract

1,028,332. Transistor amplifiers. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 15, 1963 [Feb. 17, 1962], No. 6411/62. Heading H3T. A variable gain transistor amplifier, for example an intermediate-frequency amplifier in radar equipment, comprises a common emitter transistor stage whose output is coupled to the input of a common-base transistor stage, means being provided for controlling the gain of the common-emitter stage. Since the common-base stage has a low input impedance, variations in the comparatively high output impedance of the common-emitter stage as its gain is varied do not substantially affect the characteristics of the common-base stage. In the arrangement shown, the gain of the common-emitter stage TR1 may be varied by varying the D.C. bias applied to the base of the transistor from potentiometer Rv. The control may be arranged to be due either to the varying emitter-current level or to the varying collector-voltage level with base bias. The emitter input impedance to common-base transistor TR2 exhibits an inductive component which is tuned by capacitor CN to a resonant frequency falling within the pass-band of the amplifier.
GB641162A 1962-02-17 1962-02-17 Improvements relating to variable gain transistor amplifiers Expired GB1028332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB641162A GB1028332A (en) 1962-02-17 1962-02-17 Improvements relating to variable gain transistor amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB641162A GB1028332A (en) 1962-02-17 1962-02-17 Improvements relating to variable gain transistor amplifiers

Publications (1)

Publication Number Publication Date
GB1028332A true GB1028332A (en) 1966-05-04

Family

ID=9814023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB641162A Expired GB1028332A (en) 1962-02-17 1962-02-17 Improvements relating to variable gain transistor amplifiers

Country Status (1)

Country Link
GB (1) GB1028332A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1524763A1 (en) * 2003-10-14 2005-04-20 Broadcom Corporation Modulation dependent biasing for efficient and high-linearity power amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1524763A1 (en) * 2003-10-14 2005-04-20 Broadcom Corporation Modulation dependent biasing for efficient and high-linearity power amplifiers

Similar Documents

Publication Publication Date Title
GB1172366A (en) Transistor Circuits
SE320706B (en)
GB1017759A (en) Improvements in or relating to variable gain transistor amplifiers
GB1036328A (en) Improvements in or relating to amplitude discriminator circuit arrangements
GB1111349A (en) Improvements in or relating to transistor amplifiers
GB1101488A (en) Improvements in and relating to electric signal amplifiers
GB1028332A (en) Improvements relating to variable gain transistor amplifiers
GB1022081A (en) Automatic gain control circuits
JPS5546672A (en) Transistor amplifier circuit
GB764428A (en) Improvements in or relating to radio broadcast receivers
SE322564B (en)
GB1111755A (en) Improvements in or relating to bandpass amplifiers
GB1039830A (en) A radio-frequency transistorised amplifier
GB768987A (en) Improvements in or relating to transistor amplifiers
GB1054686A (en)
GB959170A (en) Improvements relating to transistor gain control circuit arrangements
GB1127137A (en) Signal translating circuits
GB1211365A (en) Improvements in variable-gain amplifiers
GB1464738A (en) Electronically tuned amplifier stage
GB901441A (en) Transistor amplifier system
GB1013545A (en) Improvements relating to radio receivers
GB1050209A (en)
GB1108693A (en) Improvements in or relating to am detector circuits
GB1036727A (en) Improvements in or relating to variable-gain circuits
GB1065503A (en) Improvements in amplifiers