GB606374A - Improvements in or relating to frequency changing devices - Google Patents

Improvements in or relating to frequency changing devices

Info

Publication number
GB606374A
GB606374A GB1201/46A GB120146A GB606374A GB 606374 A GB606374 A GB 606374A GB 1201/46 A GB1201/46 A GB 1201/46A GB 120146 A GB120146 A GB 120146A GB 606374 A GB606374 A GB 606374A
Authority
GB
United Kingdom
Prior art keywords
output
circuit
input
taken
lecher wire
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
GB1201/46A
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 GB606374A publication Critical patent/GB606374A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/06—Transference of modulation using distributed inductance and capacitance
    • H03D9/065—Transference of modulation using distributed inductance and capacitance by means of discharge tubes having more than two electrodes
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

606,374. Electric resonators. PHILIPS LAMPS, Ltd. Jan. 14, 1946, No. 1201. Convention date, Jan. 31, 1941. [Class 40 (viii)] [Also in Group XL (c)] A frequency-changer particularly for ultra short-waves comprises two diodes with the signal input fed in push-pull and the intermediate frequency output taken in push-pull and having a common cathode with an oscillator, the common cathode circuit including an impedance. Fig. 1 shows an arrangement in which the input is fed through a Lecher wire system 9 and the output taken from the circuit 10. The oscillator is tuned by the Lecher wire system 7 and an inductance 8 is included in the lead to the cathode 2. The output circuit 10 is preferably connected to nodes in the Lecher wire system 9. In a modification a symmetrical tuned input circuit is used and the output is symmetrically arranged in parallel with a blocking condenser included therein, Fig. 2 (not shown). Alternatively, with a Lecher wire input system the output may be taken through chokes from the diode anodes, Fig. 3 (not shown). Fig. 4 shows a similar circuit in which the output circuit 10 comprises cylindrical conductors which may be arranged in parallel or, as shown, may be concentrically arranged and the input is taken through 'Lecher wire systems 9 and 24, 25 while the connection points 26, 27 are so chosen as to lie at a potential node for the signals and to offer maximum impedance in the resonator 10.
GB1201/46A 1941-01-31 1946-01-14 Improvements in or relating to frequency changing devices Expired GB606374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL606374X 1941-01-31

Publications (1)

Publication Number Publication Date
GB606374A true GB606374A (en) 1948-08-12

Family

ID=19787953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1201/46A Expired GB606374A (en) 1941-01-31 1946-01-14 Improvements in or relating to frequency changing devices

Country Status (5)

Country Link
US (1) US2441452A (en)
BE (1) BE444311A (en)
DE (1) DE872571C (en)
FR (1) FR878960A (en)
GB (1) GB606374A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636980A (en) * 1953-04-28
NL64724C (en) * 1941-07-30 1949-11-15
NL72257C (en) * 1943-03-27
US2591983A (en) * 1943-11-12 1952-04-08 Hartford Nat Bank & Trust Co Mixing circuit arrangement
FR937998A (en) * 1944-07-26 1948-10-12
NL69394C (en) * 1944-08-08
US2515441A (en) * 1947-06-25 1950-07-18 Avco Mfg Corp Antenna input circuits
US2594167A (en) * 1948-07-30 1952-04-22 Rca Corp Ultrahigh-frequency bridge circuits
US2664501A (en) * 1949-08-10 1953-12-29 Wilcox Gay Corp Frequency conversion system
US2787705A (en) * 1951-06-25 1957-04-02 Hazeltine Research Inc High-frequency wave-signal tuning device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB420754A (en) * 1932-06-04 1934-12-06 Telefunken Gmbh Improvements in or relating to thermionic apparatus for the production or amplification of ultra short waves
US2094470A (en) * 1934-10-20 1937-09-28 Rca Corp Multiple function tube
US2270791A (en) * 1939-07-13 1942-01-20 Rca Corp Oscillator-modulator circuit
NL58997C (en) * 1940-05-30
GB554675A (en) * 1942-03-13 1943-07-14 Philips Nv Improvements in or relating to frequency changing devices, more particularly for very short waves

Also Published As

Publication number Publication date
DE872571C (en) 1953-04-02
US2441452A (en) 1948-05-11
FR878960A (en) 1943-02-10
BE444311A (en)

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