GB754226A - Improvements in or relating to a frequency-changing mixing circuit embodying a self-oscillating triode with intermediate-frequency feed-back - Google Patents

Improvements in or relating to a frequency-changing mixing circuit embodying a self-oscillating triode with intermediate-frequency feed-back

Info

Publication number
GB754226A
GB754226A GB3862/54A GB386254A GB754226A GB 754226 A GB754226 A GB 754226A GB 3862/54 A GB3862/54 A GB 3862/54A GB 386254 A GB386254 A GB 386254A GB 754226 A GB754226 A GB 754226A
Authority
GB
United Kingdom
Prior art keywords
circuit
frequency
coil
grid
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
GB3862/54A
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 GB754226A publication Critical patent/GB754226A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/16—Circuits
    • H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
    • 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
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/08—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between the same two electrodes
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

754,226. Superheterodyne circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 9, 1954 [Feb. 12, 1953], No. 3862/54. Class 40 (6). In a frequency-changer comprising a selfoscillating triode provided with negative feedback at intermediate frequency to reduce the damping on the I.F. circuits, the negative feedback path is connected to the grid end of the high-frequency input circuit. A number of embodiments, are described in the Specification. In one, Fig. 2, a signal input circuit 2 is coupled to the centre of a reaction coil 4, the reaction circuit being balanced by means of a condenser 5. The coil 4 is back-coupled to a tuned anode circuit 3 fed in parallel with the I.F. transformer 6. I.F. current feedback is produced by connecting a resistor 9 in series with the transformer primary and providing a back-coupling path to the common point of blocking condensers 10, 11 which are in the grid circuit. The condensers 10, 11 may alter. natively be connected between the circuit 2 and the tap on coil 4, Fig. 3 (not shown). In other embodiments the oscillator circuit is of the Hartley (Fig. 4, not shown) or grounded grid (Fig. 7, not shown) type, or comprises a valve with a capacitive impedance in the cathode circuit (Figs. 5, 6, not shown).
GB3862/54A 1953-02-12 1954-02-09 Improvements in or relating to a frequency-changing mixing circuit embodying a self-oscillating triode with intermediate-frequency feed-back Expired GB754226A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL754226X 1953-02-12

Publications (1)

Publication Number Publication Date
GB754226A true GB754226A (en) 1956-08-08

Family

ID=19825225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3862/54A Expired GB754226A (en) 1953-02-12 1954-02-09 Improvements in or relating to a frequency-changing mixing circuit embodying a self-oscillating triode with intermediate-frequency feed-back

Country Status (5)

Country Link
US (1) US2828410A (en)
DE (1) DE1033274B (en)
FR (1) FR1098772A (en)
GB (1) GB754226A (en)
NL (2) NL176033B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083354B (en) * 1958-03-20 1960-06-15 Telefunken Gmbh Circuit arrangement for de-damping the tuned IF circuit of a self-oscillating mixer with transistor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL105942C (en) * 1956-08-24
NL261732A (en) * 1960-02-29
GB918931A (en) * 1960-08-19 1963-02-20 Pye Ltd High frequency transistor circuits

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR709238A (en) * 1930-01-27 1931-08-04 Gramophone Co Ltd Improvements to thermionic valves
NL62481C (en) * 1941-08-08
BE455595A (en) * 1943-05-03
US2631229A (en) * 1949-08-05 1953-03-10 Frank O Chesus Oscillator-mixer circuit with single triode tube
US2753449A (en) * 1952-01-30 1956-07-03 Gail E Boggs Superheterodyne mixer with negative feedback for stabilizing conversion gain

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083354B (en) * 1958-03-20 1960-06-15 Telefunken Gmbh Circuit arrangement for de-damping the tuned IF circuit of a self-oscillating mixer with transistor

Also Published As

Publication number Publication date
DE1033274B (en) 1958-07-03
NL176033B (en)
NL84011C (en)
US2828410A (en) 1958-03-25
FR1098772A (en) 1955-08-22

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