GB649097A - Improvements in or relating to constant bandwidth coupling circuit - Google Patents

Improvements in or relating to constant bandwidth coupling circuit

Info

Publication number
GB649097A
GB649097A GB19939/47A GB1993947A GB649097A GB 649097 A GB649097 A GB 649097A GB 19939/47 A GB19939/47 A GB 19939/47A GB 1993947 A GB1993947 A GB 1993947A GB 649097 A GB649097 A GB 649097A
Authority
GB
United Kingdom
Prior art keywords
coupling
condenser
fixed coils
circuit
constant bandwidth
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
GB19939/47A
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.)
Allen B du Mont Laboratories Inc
Original Assignee
Allen B du Mont Laboratories 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
Application filed by Allen B du Mont Laboratories Inc filed Critical Allen B du Mont Laboratories Inc
Publication of GB649097A publication Critical patent/GB649097A/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
    • 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
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1791—Combined LC in shunt or branch path

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)
  • Transmitters (AREA)

Abstract

649,097. Impedance networks. DU MONT LABORATORIES, Inc., A. B. July 24, 1947, No. 19939. Convention date, Aug. 3, 1946. [Class 40 (viii)] A constant bandwidth tunable coupling circuit for radio frequency amplifiers comprises two inductively coupled fixed coils, each in series with a variable inductance, a condenser in parallel with each series circuit and a condenser common and in parallel to both circuits. Inductive coupling is provided between the fixed coils 3, 4 and the variable inductances 1, 2 are ganged. Capacitive coupling is provided by a condenser 7 common to both circuits. Damping resistances are provided in shunt with each tuned circuit. The fixed coils are so arranged that the current induced by the coupling between them opposes the current flowing due to the capacitive coupling.
GB19939/47A 1946-08-03 1947-07-24 Improvements in or relating to constant bandwidth coupling circuit Expired GB649097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US649097XA 1946-08-03 1946-08-03

Publications (1)

Publication Number Publication Date
GB649097A true GB649097A (en) 1951-01-17

Family

ID=22059055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19939/47A Expired GB649097A (en) 1946-08-03 1947-07-24 Improvements in or relating to constant bandwidth coupling circuit

Country Status (1)

Country Link
GB (1) GB649097A (en)

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