GB506791A - Improvements in or relating to amplifying systems using negative feedback - Google Patents

Improvements in or relating to amplifying systems using negative feedback

Info

Publication number
GB506791A
GB506791A GB32727/37A GB3272737A GB506791A GB 506791 A GB506791 A GB 506791A GB 32727/37 A GB32727/37 A GB 32727/37A GB 3272737 A GB3272737 A GB 3272737A GB 506791 A GB506791 A GB 506791A
Authority
GB
United Kingdom
Prior art keywords
negative feedback
relating
west
east
transmission
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
GB32727/37A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 US114390A priority Critical patent/US2209955A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to GB32727/37A priority patent/GB506791A/en
Priority to FR833669D priority patent/FR833669A/en
Priority to NL85374A priority patent/NL52895C/xx
Priority to FR49495D priority patent/FR49495E/en
Publication of GB506791A publication Critical patent/GB506791A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/10—Control of transmission; Equalising by pilot signal
    • H04B3/12—Control of transmission; Equalising by pilot signal in negative-feedback path of line amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/36—Negative-feedback-circuit arrangements with or without positive feedback in discharge-tube amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • H04B3/08—Control of transmission; Equalising by the transmitted signal in negative-feedback path of line amplifier

Landscapes

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

Abstract

506,791. Two-way transmission. STANDARD TELEPHONES & CABLES, Ltd. (Western Electric Co., Inc.) Nov. 26, 1937, No. 32727. [A Specification was laid open to inspection under Sect. 91 of the Acts, June, 6, 1938.] [Class 40 (iv)] [Also in Group XL] A negative feedback amplifier using a, hybrid coil &c. bridge transformer input and output and so arranged as to obtain a prescribed value of impedance across one of the pairs of terminals of the hybrid coil is applicable to two way transmission systems. The Figure shows a system in which transmission control is effected by a network 77<SP>1</SP> in the feedback path. Separate amplifiers RE, RW are provided for east-west and west-east transmission respectively.
GB32727/37A 1936-12-05 1937-11-26 Improvements in or relating to amplifying systems using negative feedback Expired GB506791A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US114390A US2209955A (en) 1936-12-05 1936-12-05 Wave translation system
GB32727/37A GB506791A (en) 1936-12-05 1937-11-26 Improvements in or relating to amplifying systems using negative feedback
FR833669D FR833669A (en) 1936-12-05 1937-12-04 Electric wave translator systems
NL85374A NL52895C (en) 1936-12-05 1937-12-06
FR49495D FR49495E (en) 1936-12-05 1938-03-23 Electric wave translator systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US114390A US2209955A (en) 1936-12-05 1936-12-05 Wave translation system
GB32727/37A GB506791A (en) 1936-12-05 1937-11-26 Improvements in or relating to amplifying systems using negative feedback

Publications (1)

Publication Number Publication Date
GB506791A true GB506791A (en) 1939-05-26

Family

ID=26261532

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32727/37A Expired GB506791A (en) 1936-12-05 1937-11-26 Improvements in or relating to amplifying systems using negative feedback

Country Status (4)

Country Link
US (1) US2209955A (en)
FR (2) FR833669A (en)
GB (1) GB506791A (en)
NL (1) NL52895C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451858A (en) * 1945-01-26 1948-10-19 Gen Electric Controlled frequency oscillator
BE488207A (en) * 1948-04-02
US2589184A (en) * 1949-09-13 1952-03-11 Bell Telephone Labor Inc Electronic impedance equalizer
US2646218A (en) * 1950-04-25 1953-07-21 Sperry Corp Distortionless electrical resolver
US3108157A (en) * 1959-06-15 1963-10-22 Bell Telephone Labor Inc Multiple station communication circuit
US3177303A (en) * 1960-10-07 1965-04-06 Budelman Electronics Corp Voice frequency hybrid telephone repeater
FR2823618B1 (en) * 2001-04-13 2003-05-30 Electricite De France STAGE OF A HIGH FREQUENCY CURRENT POWER GENERATOR
ES2362759B1 (en) * 2008-04-14 2012-06-06 Fundacio Privada Centre Tecnologic De Telecomunicacions De Catalunya PROCEDURE AND DEVICE OF DIGITAL COMMUNICATIONS FOR THE RECEIPT OF DATA USING QAM SYMBOLS.

Also Published As

Publication number Publication date
FR833669A (en) 1938-10-27
FR49495E (en) 1939-05-01
US2209955A (en) 1940-08-06
NL52895C (en) 1942-08-15

Similar Documents

Publication Publication Date Title
GB839975A (en) Improvements in and relating to signal switched telecommunication circuits
GB506791A (en) Improvements in or relating to amplifying systems using negative feedback
GB1412620A (en) Feedback amplifier arrangements
GB539763A (en) Improvements in two-way transmission systems
GB566844A (en) Distortion reduction on modulated amplifiers
GB829307A (en) A negative impedance amplifier with separate input and output particularly for telephone systems
GB535861A (en) Improvements relating to alternating electric current control apparatus
GB798055A (en) Negative-impedance repeater using a transistor amplifier
GB409360A (en) Improvements in alternating current signal generators and amplifiers
GB897613A (en) Improvements in or relating to voice-frequency amplifiers
GB703801A (en) Improvements in or relating to voice switching in telephone transmission systems
GB377958A (en) Improvements in telephone repeaters
GB486931A (en) Improvements in or relating to electric circuit arrangements for combining the effects of two or more alternating current signal sources
GB505492A (en) Electric wave amplifying systems
GB749694A (en) Hybrid circuits for connecting a four wire transmission line to a two wire transmission line
GB437028A (en) An improved method and means for the transmission of electric signals
GB281299A (en) Improvements in or relating to amplifying arrangements for telephone lines
GB393982A (en) Improvements in telephone repeaters
ES440331A1 (en) Negative impedance repeater with double amplification, for telephone lines
GB793416A (en) Improvements in and relating to an amplifier system for telephone networks
GB302180A (en) Improvements in or relating to circuit arrangements suitable for use in signalling systems
GB414222A (en) Improvements in telephone systems
GB732199A (en) Device for controlling a telephonograph
GB513678A (en) Improvements in loud-speaking telephone circuit arrangements
GB513416A (en) Improvements in or relating to thermionic valve amplifying systems