GB617647A - Improvements in or relating to frequency-changing circuits - Google Patents

Improvements in or relating to frequency-changing circuits

Info

Publication number
GB617647A
GB617647A GB29996/46A GB2999646A GB617647A GB 617647 A GB617647 A GB 617647A GB 29996/46 A GB29996/46 A GB 29996/46A GB 2999646 A GB2999646 A GB 2999646A GB 617647 A GB617647 A GB 617647A
Authority
GB
United Kingdom
Prior art keywords
frequency
circuit
circuits
anode
intermediate frequency
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
GB29996/46A
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 GB617647A publication Critical patent/GB617647A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
    • H03F1/28—Modifications of amplifiers to reduce influence of noise generated by amplifying elements in discharge-tube amplifiers
    • 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
    • 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
    • H03D7/10—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 different pairs of electrodes

Abstract

617,647. Valve circuits for radio reception. PHILIPS LAMPS, Ltd. Oct. 8, 1946, No. 29996. Convention date, May 3. 1943. [Class 40 (v)] In a frequency-changing arrangement utilizing a multi grid valve, the signal and local oscillations are applied to the same inner grid and distribution noise is reduced by means of positive feedback at intermediate frequency. The positive feedback is taken from a coupling winding 20 which is common to both anode and screen circuits, and consequently does not contain distribution noise components. It is applied to a circuit 21 which is tuned to the intermediate frequency and is preferably of low impedance to avoid additional circuit noise. The stability and selectivity of the arrangement may be retained at their original values by means of negative feedback derived from a further coupling winding 22 which is solely in the anode circuit.
GB29996/46A 1943-05-03 1946-10-08 Improvements in or relating to frequency-changing circuits Expired GB617647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL617647X 1943-05-03

Publications (1)

Publication Number Publication Date
GB617647A true GB617647A (en) 1949-02-09

Family

ID=19788326

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29996/46A Expired GB617647A (en) 1943-05-03 1946-10-08 Improvements in or relating to frequency-changing circuits

Country Status (4)

Country Link
US (1) US2582725A (en)
BE (1) BE455595A (en)
FR (1) FR903902A (en)
GB (1) GB617647A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087183B (en) * 1956-08-24 1960-08-18 Philips Patentverwaltung Self-oscillating, additive mixer stage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859336A (en) * 1951-10-22 1958-11-04 Philips Corp Frequency conversion of signal oscillation without use of an auxiliary local oscillation
US2753449A (en) * 1952-01-30 1956-07-03 Gail E Boggs Superheterodyne mixer with negative feedback for stabilizing conversion gain
NL176033B (en) * 1953-02-12 Eastman Kodak Co COLOR IMAGING DEVICE WITH A NUMBER OF LIGHT-SENSITIVE ELEMENTS THAT ARE SENSITIVE TO DIFFERENT SPECTRAL AREAS.
NL183196B (en) * 1953-11-28 M & T Chemicals Inc PROCESS FOR THE PREPARATION OF A PREPARATION USED FOR VINYL CHLORIDE POLYMERS CELL-FORMED, PROCEDURE FOR THE PREPARATION OF VINYL CHLORIDE HOMO OR COPOLYMERS, AS WELL AS FORMED FOR RESPONSE, PREPARED UNDER ANY PREPARATION. CONSISTING WHOLLY OR PARTLY OF ANY PREPARED VINYL CHLORIDE HOMO OR COPOLYMER.
US3641441A (en) * 1969-11-13 1972-02-08 Motorola Inc Frequency conversion module including emitter follower mixer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB361351A (en) * 1930-08-15 1931-11-16 Graham Amplion Ltd Improvements in thermionic valve circuits as applied to radiotelephonic systems and apparatus
US2022085A (en) * 1931-12-14 1935-11-26 Hazeltine Corp Radioreceiver
US2032675A (en) * 1933-11-18 1936-03-03 Rca Corp Radio receiver
FR804163A (en) * 1935-07-10 1936-10-17 Csf Further development of tube oscillators
US2122283A (en) * 1937-03-09 1938-06-28 Rca Corp Frequency converter
US2202576A (en) * 1938-01-31 1940-05-28 Bendix Radio Corp Modulation system
US2302867A (en) * 1941-10-25 1942-11-24 Rca Corp Combined mixer and intermediate frequency stage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1087183B (en) * 1956-08-24 1960-08-18 Philips Patentverwaltung Self-oscillating, additive mixer stage

Also Published As

Publication number Publication date
BE455595A (en)
US2582725A (en) 1952-01-15
FR903902A (en) 1945-10-22

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