GB536583A - Improvements in stable band-pass amplifier circuits - Google Patents

Improvements in stable band-pass amplifier circuits

Info

Publication number
GB536583A
GB536583A GB2825839A GB2825839A GB536583A GB 536583 A GB536583 A GB 536583A GB 2825839 A GB2825839 A GB 2825839A GB 2825839 A GB2825839 A GB 2825839A GB 536583 A GB536583 A GB 536583A
Authority
GB
United Kingdom
Prior art keywords
cathode
valve
circuits
grid
coupling
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
GB2825839A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB2825839A priority Critical patent/GB536583A/en
Publication of GB536583A publication Critical patent/GB536583A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • 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

536,583. Valve amplifying and generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., RUST, N. M., BRAILSFORD, J. D., and GOODENOUGH, E. F. Oct. 19, 1939, No. 28258. [Class 40 (v)] A negative impedance effect, independent of valve constants, for providing stable re-action so as to give sharp tuning in a band-pass amplifier, is produced in a multi-valve stage by including in the cathode leg of each valve a negative feedback circuit such that the product of the impedance of the feedback circuit and the mutual conductance of the associated valve is considerably greater than unity. Fig. 2 shows an arrangement in which positive feedback is obtained by the common cathode network ZIV, and this impedance producing positive feed-back may have a value large enough to cause the valve to oscillate. The intervalve coupling ZII comprises a parallel tuned circuit and similar circuits ZI, ZIII in the cathode leads provide negative feedback. Circuits of very low Q are preferably used and the grid-cathode capacity may be tuned out by coupling the coils in the grid and cathode circuits and the cathode-anode capacity may be tuned out by coupling inductances in the anode and cathode leads, compensation for grid-cathode capacity may also be obtained.
GB2825839A 1939-10-19 1939-10-19 Improvements in stable band-pass amplifier circuits Expired GB536583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2825839A GB536583A (en) 1939-10-19 1939-10-19 Improvements in stable band-pass amplifier circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2825839A GB536583A (en) 1939-10-19 1939-10-19 Improvements in stable band-pass amplifier circuits

Publications (1)

Publication Number Publication Date
GB536583A true GB536583A (en) 1941-05-20

Family

ID=10272796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2825839A Expired GB536583A (en) 1939-10-19 1939-10-19 Improvements in stable band-pass amplifier circuits

Country Status (1)

Country Link
GB (1) GB536583A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668881A (en) * 1949-12-27 1954-02-09 Bendix Aviat Corp Maximum gain-bandwidth amplifier system
US2904758A (en) * 1955-10-14 1959-09-15 Philips Corp Circuit arrangement for converting impedances

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2668881A (en) * 1949-12-27 1954-02-09 Bendix Aviat Corp Maximum gain-bandwidth amplifier system
US2904758A (en) * 1955-10-14 1959-09-15 Philips Corp Circuit arrangement for converting impedances

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