GB649097A - Improvements in or relating to constant bandwidth coupling circuit - Google Patents
Improvements in or relating to constant bandwidth coupling circuitInfo
- 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
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.
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) |
-
1947
- 1947-07-24 GB GB19939/47A patent/GB649097A/en not_active Expired
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