GB767061A - Improvements in or relating to multi-stage variable-gain thermionic amplifiers - Google Patents

Improvements in or relating to multi-stage variable-gain thermionic amplifiers

Info

Publication number
GB767061A
GB767061A GB3632454A GB3632454A GB767061A GB 767061 A GB767061 A GB 767061A GB 3632454 A GB3632454 A GB 3632454A GB 3632454 A GB3632454 A GB 3632454A GB 767061 A GB767061 A GB 767061A
Authority
GB
United Kingdom
Prior art keywords
current
gain
resistors
control
relating
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
GB3632454A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB767061A publication Critical patent/GB767061A/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
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0041—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using thermistors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/32—Reducing cross-talk, e.g. by compensating

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

767,061. Volume control. SIEMENS & HALSKE AKT.-GES. Dec. 15, 1954 [Dec. 15, 1953], No. 36324/54. Class 40 (4). [Also in Group XL (c)] In an amplifier of variable gain a negative feed-back voltage produced in one stage is fed back to a preceding stage via a network whose attenuation is controllable by a direct current. The cathode circuits of valves 15, 17 are coupled together via blocking condensers 22, 23 and a ladder network comprising series fixed resistors 29, 30, 31 and shunt current-variable resistors 24, 27, 28, 25. Blocking condensers 34, 351, 37, 38 and chokes 32, 33 are provided so that a D.C. control current applied to terminals 35, 36 passes through the resistors 24, 27, 28, 25 in series. The control current may comprise the anode current of the valve 15, a gain control voltage being applied to its grid.
GB3632454A 1953-12-15 1954-12-15 Improvements in or relating to multi-stage variable-gain thermionic amplifiers Expired GB767061A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES36790A DE1006898B (en) 1953-12-15 1953-12-15 Amplifier of high linearity with gain control by influencing a negative feedback

Publications (1)

Publication Number Publication Date
GB767061A true GB767061A (en) 1957-01-30

Family

ID=7482345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3632454A Expired GB767061A (en) 1953-12-15 1954-12-15 Improvements in or relating to multi-stage variable-gain thermionic amplifiers

Country Status (2)

Country Link
DE (1) DE1006898B (en)
GB (1) GB767061A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211274B (en) * 1962-03-23 1966-02-24 Siemens Ag Albis Circuit arrangement in an electrical amplifier in exchange-fed telecommunication subscriber facilities

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849860C (en) * 1937-09-15 1952-09-18 Telefunken Gmbh Receiver with a shrinkage control acting in the high and low frequency parts
DE743025C (en) * 1941-04-01 1943-12-17 Siemens Ag Circuit arrangement for regulating the transmission rate with the aid of controlled, non-linear regulating resistors
DE845059C (en) * 1948-06-19 1952-07-28 Christian Chalhoub Arrangement for automatic adjustment of a constant amplifier output voltage

Also Published As

Publication number Publication date
DE1006898B (en) 1957-04-25

Similar Documents

Publication Publication Date Title
GB915404A (en) Improvements in or relating to variable gain circuit arrangements
GB767061A (en) Improvements in or relating to multi-stage variable-gain thermionic amplifiers
GB700129A (en) Improvements in electric loudspeaker amplifying systems
GB890073A (en) Improvements in or relating to radio frequency amplifiers
GB672373A (en) Improvements in or relating to thermionic valve circuit arrangements
GB757669A (en) Amplifier with mismatched interstage networks
GB489289A (en) Improvements in or relating to thermionic amplifiers
GB915268A (en) Improvements in or relating to communication circuits including a buffer amplifier
GB617630A (en) Improvements in or relating to thermionic valve wave translating circuits
GB849244A (en) Improvements in or relating to d.c. amplifiers
GB657747A (en) Improvements in or relating to valve amplifiers
GB562655A (en) Improvements in or relating to negative feedback amplifiers
GB672256A (en) Improved electronic valve amplifiers
GB779172A (en) Improvements in and relating to telephone systems and the like
GB923428A (en) Circuit arrangement for controlling the amplification in a transistor amplifier stage
GB678061A (en) Improvements in or relating to thermionic valve amplifier arrangements
GB525470A (en) Improvements in and relating to thermionic valve circuits
GB683319A (en) Improvements in or relating to thermionic valve amplifiers
GB913138A (en) Improvements in or relating to balanced electronic circuits
GB503083A (en) Improvements in or relating to thermionic amplifiers
GB889521A (en) Materials sorting apparatus
GB841816A (en) "servo system"
GB674908A (en) Improvements in or relating to correcting circuits for television transmitter tubes
GB520549A (en) Improvements in or relating to thermionic amplifiers
GB868130A (en) Electric discharge tube