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 waves

Info

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
Application number
GB8118/46A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB609542A publication Critical patent/GB609542A/en
Expired legal-status Critical Current

Links

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.
GB8118/46A 1941-07-30 1946-03-15 Improvements in or relating to frequency-changers in superheterodyne receivers for very short waves Expired GB609542A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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