GB505598A - Improvements in or relating to automatic tuning devices for radio receivers - Google Patents
Improvements in or relating to automatic tuning devices for radio receiversInfo
- Publication number
- GB505598A GB505598A GB31317/37A GB3131737A GB505598A GB 505598 A GB505598 A GB 505598A GB 31317/37 A GB31317/37 A GB 31317/37A GB 3131737 A GB3131737 A GB 3131737A GB 505598 A GB505598 A GB 505598A
- Authority
- GB
- United Kingdom
- Prior art keywords
- automatic tuning
- resistances
- nov
- valve
- potentials
- 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
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/02—Automatic frequency control
- H03J7/16—Automatic frequency control where the frequency control is accomplished by mechanical means, e.g. by a motor
Landscapes
- Circuits Of Receivers In General (AREA)
- Amplifiers (AREA)
Abstract
505,598. Wireless receiving circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Nov. 15, 1937, No. 31317. Convention date, Nov. 14,1936. [Class 40 (v)] In an automatic tuning-correction circuit in which a differential frequency control voltage is derived from a filter 3 having the centre of one coil connected with one end of the other coil, the rectifiers 2, 13, for providing the opposing D.C. potentials are also used for demodulation. In series with resistances 4, 17, across which the D.C. control potentials are developed, are connected transformer windings 28, 29, one of which is reversely connected so that the two L.F. voltages are applied in additive phase to the grid of valve 8. The resultant control voltage at point 31 is also amplified in the low-frequency stage 8 and' operates electrodynamically through the de-, vice 21 a correcting condenser in the receiver. In a modification, valve 8 is replaced by a push-pull pair, the secondary of the input transformer being divided and connected across resistances 4, 17, the tune correcting means being operated by the differential anode current of the valves.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE505598X | 1936-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB505598A true GB505598A (en) | 1939-05-15 |
Family
ID=6546401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31317/37A Expired GB505598A (en) | 1936-11-14 | 1937-11-15 | Improvements in or relating to automatic tuning devices for radio receivers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2151506A (en) |
| FR (1) | FR829003A (en) |
| GB (1) | GB505598A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5393189A (en) * | 1993-07-26 | 1995-02-28 | Berquist; Lloyd G. | Spreader for particulate material |
-
1937
- 1937-11-12 FR FR829003D patent/FR829003A/en not_active Expired
- 1937-11-15 GB GB31317/37A patent/GB505598A/en not_active Expired
- 1937-12-15 US US179883A patent/US2151506A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2151506A (en) | 1939-03-21 |
| FR829003A (en) | 1938-06-08 |
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