GB546141A - Improvements in or relating to wireless receivers - Google Patents
Improvements in or relating to wireless receiversInfo
- Publication number
- GB546141A GB546141A GB16936/40A GB1693640A GB546141A GB 546141 A GB546141 A GB 546141A GB 16936/40 A GB16936/40 A GB 16936/40A GB 1693640 A GB1693640 A GB 1693640A GB 546141 A GB546141 A GB 546141A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- short
- condensers
- switches
- relating
- 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
- H03J3/00—Continuous tuning
- H03J3/02—Details
- H03J3/10—Circuit arrangements for fine tuning, e.g. bandspreading
-
- 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
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
546,141. Wireless receiving apparatus. COOPER, A. H. Nov. 26, 1940, No. 16936. [Class 40 (v)] A single permeability tuned inductance 1 serves as the sole variable tuning device. For the long and medium wave bands, a wave change switch 3 switches in the appropriate short condenser 2 or 4, while for the short wave bands the appropriate circuit 5, 6 or 7, 8 is switched in shunt, the values of the components being chosen to give band spreading on the short waves. By using the ganged wave-change switches, one or both of the condensers 6, 8 may be replaced by condensers 2, 4.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB16936/40A GB546141A (en) | 1940-11-26 | 1940-11-26 | Improvements in or relating to wireless receivers |
US439850A US2325174A (en) | 1940-11-26 | 1942-04-21 | Tuned circuits for wireless receivers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB16936/40A GB546141A (en) | 1940-11-26 | 1940-11-26 | Improvements in or relating to wireless receivers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB546141A true GB546141A (en) | 1942-06-30 |
Family
ID=10086338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16936/40A Expired GB546141A (en) | 1940-11-26 | 1940-11-26 | Improvements in or relating to wireless receivers |
Country Status (2)
Country | Link |
---|---|
US (1) | US2325174A (en) |
GB (1) | GB546141A (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2424506A (en) * | 1942-10-24 | 1947-07-22 | Rca Corp | Permeability-tuned short-wave spread-band receiver |
US2653244A (en) * | 1946-01-29 | 1953-09-22 | James L Clark | Resonant line oscillator |
US2475638A (en) * | 1946-09-28 | 1949-07-12 | Gen Electric | Tuning circuit for high-frequency receivers |
US3139588A (en) * | 1962-02-20 | 1964-06-30 | Space Technology Lab Inc | Variable time delay generator utilizing switch means and plural resonating elements |
DE4012265A1 (en) * | 1990-04-17 | 1991-10-24 | Toepholm & Westermann | CIRCUIT ARRANGEMENT FOR AN OUTPUT TANK CIRCUIT OF A TRANSMITTER END STAGE OPERATED WITH FREQUENCY REVERSING |
JP2005534203A (en) * | 2001-10-16 | 2005-11-10 | 株式会社RfStream | Method and apparatus for implementing a receiver on a monolithic integrated circuit |
US7199844B2 (en) * | 2002-05-28 | 2007-04-03 | Rfstream Corporation | Quadratic nyquist slope filter |
EP1532736A1 (en) * | 2002-05-29 | 2005-05-25 | Ukom, Inc. | Methods and apparatus for tuning using successive aproximation |
US7116961B2 (en) * | 2002-05-29 | 2006-10-03 | Rfstream Corporation | Image rejection quadratic filter |
EP1514345A2 (en) * | 2002-06-05 | 2005-03-16 | Rfstream Corporation | Quadratic video demodulation with baseband nyquist filter |
US6882245B2 (en) * | 2002-06-05 | 2005-04-19 | Rf Stream Corporation | Frequency discrete LC filter bank |
US6940365B2 (en) * | 2003-07-18 | 2005-09-06 | Rfstream Corporation | Methods and apparatus for an improved discrete LC filter |
KR100548130B1 (en) * | 2004-02-21 | 2006-02-02 | 삼성전자주식회사 | The wideband tunable bandpass filter and multi-band wideband tunable bandpass filter using it |
US7446631B2 (en) * | 2005-03-11 | 2008-11-04 | Rf Stream Corporation | Radio frequency inductive-capacitive filter circuit topology |
US20060217095A1 (en) * | 2005-03-11 | 2006-09-28 | Takatsuga Kamata | Wideband tuning circuit |
WO2006099161A2 (en) * | 2005-03-11 | 2006-09-21 | Rfstream Corporation | A mosfet temperature compensation current source |
US11158794B2 (en) | 2018-08-14 | 2021-10-26 | Newport Fab, Llc | High-yield tunable radio frequency (RF) filter with auxiliary capacitors and non-volatile RF switches |
US11196401B2 (en) | 2018-08-14 | 2021-12-07 | Newport Fab, Llc | Radio frequency (RF) module using a tunable RF filter with non-volatile RF switches |
-
1940
- 1940-11-26 GB GB16936/40A patent/GB546141A/en not_active Expired
-
1942
- 1942-04-21 US US439850A patent/US2325174A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2325174A (en) | 1943-07-27 |
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