GB1180200A - Improvements in or relating to Feedback Amplifier Systems - Google Patents

Improvements in or relating to Feedback Amplifier Systems

Info

Publication number
GB1180200A
GB1180200A GB61505/68A GB6150568A GB1180200A GB 1180200 A GB1180200 A GB 1180200A GB 61505/68 A GB61505/68 A GB 61505/68A GB 6150568 A GB6150568 A GB 6150568A GB 1180200 A GB1180200 A GB 1180200A
Authority
GB
United Kingdom
Prior art keywords
amplifier
input
network
resistive
output
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
GB61505/68A
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 AG
Original Assignee
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 AG filed Critical Siemens AG
Publication of GB1180200A publication Critical patent/GB1180200A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/28—Impedance matching networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks

Landscapes

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

Abstract

1,180,200. Negative feedback amplifying circuits. SIEMENS A.G. 26 July, 1967 [27 July, 1966], No. 61505/68. Divided out of 1,178,039. Heading H3T. In an amplifier having a first negative feedback path in series with both the input and output circuits of the amplifier, and a second negative feedback path in parallel with both the input and output circuits of the amplifier, the first feedback path takes the form of a twoterminal device #s comprising resistance and reactance in parallel, while the second feedback path is in the form of a T-network # 1 , # 2 , # p , at least one of the series arms of which is resistive: the shunt arm of the T-network is reactive and the ratio of its reactance to the reactance of the two terminal device is made less by 1 than the ratio of the resistance of the said one series arm and the resistance of the two-terminal network. It is shown in the Specification that if (1) the amplifier is terminated in a resistive load Z A and the input series arm # 1 of the T- network is resistive and dimensioned in the manner specified, the input impedance WE of the amplifier may be made real and frequency independent and equal to the resistance of the two-terminal device. The output series arm # 2 may then be reactive and chosen to provide a desired frequency response without affecting the input impedance of the amplifier. If, alternatively (2) the amplifier input source impedance R g is resistive and the output series arm # 2 of the T-network is resistive and dimensioned in the manner specified, the output impedance W A of the amplifier may be made real and frequency independent. The input series arm # 1 may then be made reactive to provide a desired frequency response without affecting the output impedance of the amplifier. An amplifier stage of the first type may be followed by one of the second type by the interposition of a buffer stage which may comprise a grounded-emitter transistor stage with heavy negative feedback.
GB61505/68A 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems Expired GB1180200A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DES105029A DE1272998B (en) 1966-07-27 1966-07-27 Amplifier arrangement with parallel and series feedback from the output to the input
DES105024A DE1272997B (en) 1966-07-27 1966-07-27 Amplifier arrangement with parallel and series feedback from the output to the input
DES0108803 1967-03-14

Publications (1)

Publication Number Publication Date
GB1180200A true GB1180200A (en) 1970-02-04

Family

ID=27212983

Family Applications (3)

Application Number Title Priority Date Filing Date
GB61506/68A Expired GB1179520A (en) 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems
GB61505/68A Expired GB1180200A (en) 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems
GB34206/67A Expired GB1178039A (en) 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB61506/68A Expired GB1179520A (en) 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB34206/67A Expired GB1178039A (en) 1966-07-27 1967-07-26 Improvements in or relating to Feedback Amplifier Systems

Country Status (7)

Country Link
AT (2) AT285676B (en)
BE (1) BE701911A (en)
DE (3) DE1272998B (en)
GB (3) GB1179520A (en)
NL (1) NL148460B (en)
SE (1) SE343737B (en)
YU (1) YU35410B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972002A (en) * 1974-12-30 1976-07-27 Bell Telephone Laboratories, Incorporated Dual feedback amplifier

Also Published As

Publication number Publication date
NL148460B (en) 1976-01-15
NL6709907A (en) 1968-01-29
YU147667A (en) 1980-06-30
GB1178039A (en) 1970-01-14
AT285676B (en) 1970-11-10
AT279673B (en) 1970-03-10
GB1179520A (en) 1970-01-28
DE1512765A1 (en) 1969-08-14
YU35410B (en) 1980-12-31
DE1272998B (en) 1968-07-18
DE1272997B (en) 1968-07-18
SE343737B (en) 1972-03-13
BE701911A (en) 1968-01-29

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