GB762745A - Improvements in or relating to frequency-changer circuit-arrangements for use at very high frequencies - Google Patents

Improvements in or relating to frequency-changer circuit-arrangements for use at very high frequencies

Info

Publication number
GB762745A
GB762745A GB35254/54A GB3525454A GB762745A GB 762745 A GB762745 A GB 762745A GB 35254/54 A GB35254/54 A GB 35254/54A GB 3525454 A GB3525454 A GB 3525454A GB 762745 A GB762745 A GB 762745A
Authority
GB
United Kingdom
Prior art keywords
line
inductance
frequency
dec
valve
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
GB35254/54A
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 Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB762745A publication Critical patent/GB762745A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/02—Lecher resonators
    • 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
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Abstract

762,745. Superheterodyne circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Dec. 6, 1954 [Dec. 9, 1953], No. 35254/54. Classes 40(5) and 40(6) A self-oscillating frequency-changer comprises a valve with a tuned Lecher line ¢L3, ¢L3, as oscillator circuit. One side of the line is connected to the grid and the other to cathode via inductance L8 and condenser C2 which serve for balancing the line at the two ends of the tuning range. Oscillations are maintained by a backcoupling loop L4 in the anode circuit, in series with a blocking condenser which tunes the primary of the first I.F. transformer L6. Signals are introduced into a further Lecher line L2 which is coupled to the neutral point on the oscillator line ¢L3, ¢L3 by means of the joint tuning bridge B, via a coupling loop L1. A series inductance L9 provides for tracking. Regenerative feedback is provided at signal frequency by inductance L5, in conjunction with the valve capacitors, and at intermediate frequencies by condensers C1, 5 in conjunction with resistor R2. In a modification (Fig. 3, not shown) the inductances L8, 9 are dispensed with, the necessary differences in inductance of the lines being obtained by using curved lines of differing radii.
GB35254/54A 1953-12-09 1954-12-06 Improvements in or relating to frequency-changer circuit-arrangements for use at very high frequencies Expired GB762745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL762745X 1953-12-09

Publications (1)

Publication Number Publication Date
GB762745A true GB762745A (en) 1956-12-05

Family

ID=19827520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35254/54A Expired GB762745A (en) 1953-12-09 1954-12-06 Improvements in or relating to frequency-changer circuit-arrangements for use at very high frequencies

Country Status (6)

Country Link
US (1) US2812432A (en)
BE (1) BE533945A (en)
DE (1) DE1034225B (en)
FR (1) FR1118454A (en)
GB (1) GB762745A (en)
NL (2) NL92538C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL261732A (en) * 1960-02-29
CN103410806B (en) * 2013-08-30 2016-02-24 徐州重型机械有限公司 A kind of hoist and draft hitch, hanging oil cylinder

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE540338C (en) * 1931-04-14 1932-12-14 Karl Kohl Dr Tube circuit for generating and receiving ultrashort waves
DE662148C (en) * 1933-09-01 1938-07-06 Ernst E W Kassner Ultra-short wave transmitter
DE651954C (en) * 1934-10-05 1937-10-22 Philips Patentverwaltung Device for coordinating a Lecher wire system consisting of two parallel conductors of the same length
US2126541A (en) * 1935-09-20 1938-08-09 Lee De Forest Lab High frequency oscillating circuit
NL73569C (en) * 1947-11-29
GB698397A (en) * 1951-07-02 1953-10-14 Philips Electrical Ind Ltd Improvements in or relating to superheterodyne receiving circuits

Also Published As

Publication number Publication date
DE1034225B (en) 1958-07-17
FR1118454A (en) 1956-06-06
NL183474B (en)
BE533945A (en)
US2812432A (en) 1957-11-05
NL92538C (en)

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