GB609542A - Improvements in or relating to frequency-changers in superheterodyne receivers for very short waves - Google Patents
Improvements in or relating to frequency-changers in superheterodyne receivers for very short wavesInfo
- Publication number
- GB609542A GB609542A GB8118/46A GB811846A GB609542A GB 609542 A GB609542 A GB 609542A GB 8118/46 A GB8118/46 A GB 8118/46A GB 811846 A GB811846 A GB 811846A GB 609542 A GB609542 A GB 609542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- lecher
- node
- changers
- 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
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/14—Balanced arrangements
- H03D7/1408—Balanced arrangements with diodes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/008—Receiver or amplifier input circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/06—Answer-back mechanisms or circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
- H04L15/04—Apparatus or circuits at the transmitting end
- H04L15/22—Apparatus or circuits for sending one or a restricted number of signals, e.g. distress signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Noise Elimination (AREA)
Abstract
609,542. Radio receiving circuits. PHILIPS LAMPS, Ltd. March 15, 1946, No..8118. Convention date, July 30, 1941. [Class 40 (v)] In a frequencychanging arrangement in which local oscillations from the source 10 are applied in phase to the cathode 9 of the mixing valve, and received signals in push-pull to the anodes 6, 7 via a Lecher wire system 3, radiation of the local oscillations is prevented by arranging the system constituted by the two Lecher wires 3 jointly relative to their surroundings of such dimensions that the point of connection of the aerial 1 is a potential node for the local oscillator frequency. The Lecher wires 3 are extended to an appropriate length and terminate in an earthing bridge 13. The position of the node may be adjusted by means of a variable reactance in the earth connection (Fig. 4, not shown). The Lecher wires may be surrounded by a screen, which in a further arrangement (Fig. 5, not shown) is connected to the wires by a shorting bridge utilized to adjust the position of the node.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL102359A NL60852C (en) | 1941-07-30 | 1941-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB609542A true GB609542A (en) | 1948-10-04 |
Family
ID=41667547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8118/46A Expired GB609542A (en) | 1941-07-30 | 1946-03-15 | Improvements in or relating to frequency-changers in superheterodyne receivers for very short waves |
Country Status (5)
Country | Link |
---|---|
US (1) | US2505251A (en) |
DE (1) | DE885873C (en) |
FR (1) | FR884515A (en) |
GB (1) | GB609542A (en) |
NL (1) | NL60852C (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2562342A (en) * | 1946-02-18 | 1951-07-31 | Oliver I Steigerwalt | Transmitter output coupling circuit |
US2772355A (en) * | 1951-07-05 | 1956-11-27 | Polytechnic Res & Dev Co Inc | Wide range tuner |
US2771548A (en) * | 1952-07-08 | 1956-11-20 | Polytechnic Res & Dev Co Inc | Receiver tunable over v. h. f. and u. h. f. television bands |
DE973679C (en) * | 1952-07-25 | 1960-04-28 | Telefunken Gmbh | Circuit arrangement for suppressing the emission of the harmonics of an oscillator of a VHF receiver |
US2931900A (en) * | 1955-01-31 | 1960-04-05 | David M Goodman | Electrical testing |
US3558969A (en) * | 1967-12-13 | 1971-01-26 | Philips Corp | Electron discharge tube having an anode forming part of a lecher-line with a heat dissipating element |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2011942A (en) * | 1932-01-16 | 1935-08-20 | Rca Corp | Ultra short wave receiver |
US2052888A (en) * | 1932-04-05 | 1936-09-01 | Rca Corp | Short wave signaling |
US2326801A (en) * | 1938-09-22 | 1943-08-17 | George E Pray | High frequency tubes and circuits |
US2260840A (en) * | 1939-08-19 | 1941-10-28 | Gen Electric | Temperature control system |
US2382693A (en) * | 1940-02-24 | 1945-08-14 | Dallenbach Walter | Oscillator-modulator circuit |
US2260844A (en) * | 1940-03-12 | 1941-10-28 | Gen Electric | Ultra high frequency converter |
GB570359A (en) * | 1940-06-21 | 1945-07-04 | Standard Telephones Cables Ltd | Improvements in or relating to lecher wire systems |
-
1941
- 1941-07-30 NL NL102359A patent/NL60852C/xx active
-
1942
- 1942-07-28 DE DEN2306D patent/DE885873C/en not_active Expired
- 1942-07-28 FR FR884515D patent/FR884515A/en not_active Expired
-
1946
- 1946-03-15 GB GB8118/46A patent/GB609542A/en not_active Expired
- 1946-05-09 US US668538A patent/US2505251A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR884515A (en) | 1943-08-19 |
DE885873C (en) | 1953-08-10 |
US2505251A (en) | 1950-04-25 |
NL60852C (en) | 1947-05-16 |
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