GB885849A - Improvements in negative feed-back amplifiers - Google Patents

Improvements in negative feed-back amplifiers

Info

Publication number
GB885849A
GB885849A GB2850958A GB2850958A GB885849A GB 885849 A GB885849 A GB 885849A GB 2850958 A GB2850958 A GB 2850958A GB 2850958 A GB2850958 A GB 2850958A GB 885849 A GB885849 A GB 885849A
Authority
GB
United Kingdom
Prior art keywords
circuit
feedback
tuned circuit
amplifier
parallel
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
GB2850958A
Inventor
Wolfgang Holland
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta 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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Priority to GB2850958A priority Critical patent/GB885849A/en
Publication of GB885849A publication Critical patent/GB885849A/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

Landscapes

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

Abstract

885,849. Valve amplifying circuits. LOEWE OPTA A.G. Sept. 5, 1958, No. 28509/58. Class 40(6). An amplifier having negative feedback which changes to positive feedback above a certain frequency is characterized in that the feedback path contains a resonant circuit and an additional phase shifting circuit. As shown, the amplifier has a feedback path which includes capacitors 8 and 9, potentiometer 10, and a parallel tuned circuit 5. The component values are adjusted such that the normally negative feedback goes positive about 1 kc./s. from the resonant frequency of the tuned circuit, which is in the order of 15 kc./s. A parallel C.R. network 13, 14 is included in series with the tuned circuit, and a switch 17 is adapted to short out either one or the other.
GB2850958A 1958-09-05 1958-09-05 Improvements in negative feed-back amplifiers Expired GB885849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2850958A GB885849A (en) 1958-09-05 1958-09-05 Improvements in negative feed-back amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2850958A GB885849A (en) 1958-09-05 1958-09-05 Improvements in negative feed-back amplifiers

Publications (1)

Publication Number Publication Date
GB885849A true GB885849A (en) 1961-12-28

Family

ID=10276763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2850958A Expired GB885849A (en) 1958-09-05 1958-09-05 Improvements in negative feed-back amplifiers

Country Status (1)

Country Link
GB (1) GB885849A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753140A (en) * 1970-09-09 1973-08-14 Wandel & Goltermann Equalizing network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753140A (en) * 1970-09-09 1973-08-14 Wandel & Goltermann Equalizing network

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