GB851229A - Improvements in or relating to self-oscillating additive mixer circuits - Google Patents

Improvements in or relating to self-oscillating additive mixer circuits

Info

Publication number
GB851229A
GB851229A GB26406/57A GB2640657A GB851229A GB 851229 A GB851229 A GB 851229A GB 26406/57 A GB26406/57 A GB 26406/57A GB 2640657 A GB2640657 A GB 2640657A GB 851229 A GB851229 A GB 851229A
Authority
GB
United Kingdom
Prior art keywords
condenser
coil
self
oscillating
choke
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
GB26406/57A
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 GB851229A publication Critical patent/GB851229A/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
    • H03D7/06—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
    • 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
    • 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

851,229. Superheterodyne circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Aug. 21, 1957 [Aug. 24, 1956], No. 26406/57. Class 40(6). In a self-oscillating triode frequency-changer, I.F. regeneration is used and is derived from a choke 18 in the anode circuit of the valve. The aerial is connected to a coil 3 coupled to tuned signal circuit 4, 5, 6. A tapping point on this is connected via a blocking condenser to a tap on the oscillator coupling coil 8 which is a neutral point for local oscillations, the input capacity of the valve being balanced by a condenser 11. The anode circuit comprises tuned oscillator circuit 12, 13 which is back-coupled to coil 8 and is fed via condenser 14 in parallel with the primary 15 of the I.F. transformer, which resonates at I.F. with condenser 14. I.F. regeneration derived from choke 18 in series with primary 15 is applied across the condenser 6. A feed resistor 19 provides I.F. decoupling, in conjunction with condenser 20, and in addition produces negative feedback at low frequencies, permitting the use of a grid leak 10 of large value without danger of squegging.
GB26406/57A 1956-08-24 1957-08-21 Improvements in or relating to self-oscillating additive mixer circuits Expired GB851229A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP16889A DE1087183B (en) 1956-08-24 1956-08-24 Self-oscillating, additive mixer stage

Publications (1)

Publication Number Publication Date
GB851229A true GB851229A (en) 1960-10-12

Family

ID=6780371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26406/57A Expired GB851229A (en) 1956-08-24 1957-08-21 Improvements in or relating to self-oscillating additive mixer circuits

Country Status (5)

Country Link
US (1) US2928936A (en)
DE (1) DE1087183B (en)
FR (1) FR1189131A (en)
GB (1) GB851229A (en)
NL (2) NL220065A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL261732A (en) * 1960-02-29

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL43529C (en) * 1933-12-13
DE688531C (en) * 1937-06-05 1940-02-23 Telefunken Gmbh Linearized, aperiodic high-frequency amplifiers through negative feedback
GB533558A (en) * 1939-11-07 1941-02-14 Gen Electric Co Ltd Improvements in high frequency amplifiers including thermionic valves
BE455595A (en) * 1943-05-03
DE938552C (en) * 1951-09-20 1956-02-02 Siemens Ag Circuit arrangement for overlay receiver
US2713634A (en) * 1952-04-10 1955-07-19 Rca Corp Mixer circuit
NL84011C (en) * 1953-02-12
US2789213A (en) * 1955-06-02 1957-04-16 Zenith Radio Corp Cascode amplifier-mixer with trap to prevent local oscillator in driven stage from affecting driving stage

Also Published As

Publication number Publication date
US2928936A (en) 1960-03-15
FR1189131A (en) 1959-09-29
NL105942C (en)
NL220065A (en)
DE1087183B (en) 1960-08-18

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