GB562512A - Improvements in or relating to multi-range high frequency systems - Google Patents
Improvements in or relating to multi-range high frequency systemsInfo
- Publication number
- GB562512A GB562512A GB18538/42A GB1853842A GB562512A GB 562512 A GB562512 A GB 562512A GB 18538/42 A GB18538/42 A GB 18538/42A GB 1853842 A GB1853842 A GB 1853842A GB 562512 A GB562512 A GB 562512A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coupling
- inductive
- circuit
- resonant circuit
- high frequency
- 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
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
Abstract
562,512. Transformers. JOHNSON LABORATORIES, Inc. Dec. 30, 1942, No.' 18538. Convention date, Jan. 5, 1942. [Class 38 (ii)] [Also in Group XL] A multi-range high frequency tunable resonant circuit having an inductive winding coupled thereto and with the windings concentrically arranged is associated with a switch so that on the lower wave range the larger inductance L1 is included in the tuned circuit and the other L2 comprises a coupling coil, while on the higher wave range the inductances are connected in parallel while a tapping T1 on the inductance L2 provides the inductive coupling. Fig. 3 shows the arrangement of windings and the ferro-magnetic core F. Fig. 1 shows the application to an oscillator using separate condensers C1, C2 for the two wave-ranges. In a modification, Figs. 4 and 5 (not shown), the inductive winding is included in an aerial circuit and the resonant circuit forms an input coupling. Alternatively, the circuit may be used as an interstage coupling in which the resonant circuit forms the secondary winding and the inductive coupling the primary winding.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US562512XA | 1942-01-05 | 1942-01-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB562512A true GB562512A (en) | 1944-07-05 |
Family
ID=22003181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18538/42A Expired GB562512A (en) | 1942-01-05 | 1942-12-30 | Improvements in or relating to multi-range high frequency systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB562512A (en) |
-
1942
- 1942-12-30 GB GB18538/42A patent/GB562512A/en not_active Expired
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