GB454996A - Improvements in signal-translating and-modulating systems - Google Patents

Improvements in signal-translating and-modulating systems

Info

Publication number
GB454996A
GB454996A GB5945/36A GB594536A GB454996A GB 454996 A GB454996 A GB 454996A GB 5945/36 A GB5945/36 A GB 5945/36A GB 594536 A GB594536 A GB 594536A GB 454996 A GB454996 A GB 454996A
Authority
GB
United Kingdom
Prior art keywords
grid
coupling
valve
circuit
condenser
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
GB5945/36A
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.)
HASELTINE CORP
Original Assignee
HASELTINE CORP
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 HASELTINE CORP filed Critical HASELTINE CORP
Publication of GB454996A publication Critical patent/GB454996A/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
    • H03D7/10—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

454,996. Valve circuits for wireless reception &c. HASELTINE CORPORATION, 15, Exchange Place, Jersey City, New Jersey, U.S.A.-(Assignees of Wheeler, H. A.; 18, Melbourne Road, Great Neck, New York, U.S.A.) Feb. 27, 1936, No. 5945. Convention date, March 27, 1935. [Class 40 (v)] Undesired inter-action between the electrodes of a multi-grid valve, such as is used for modulation or frequency-conversion in a superheterodyne receiver, is prevented by an external coupling, e.g. a condenser, between the grids. The Figure shows the circuit of a frequency-converter valve of the kind described in Specification 436,940, in which the first two grids are back-coupled by inductive coupling 20, 23 and a capacity coupling 21, the third grid receives the signal input from a tuned circuit 13, 14 the fourth grid comprises a fixed-voltage screen, and the anode circuit 18 is coupled to the intermediate-frequency amplifier 27. Undesired inter - action is neutralized by a condenser 31 connected between the signal input grid and the oscillator grid. The condenser 31 neutralizes the effect of the coupling between the oscillator anode and the input grid due to the capacity between them and their mutual conductance. It also neutralizes the effect of the " space-charge coupling" in the valve. Damping or regeneration of the input circuit 13, 14 is thus prevented, and the local oscillator voltage is not allowed to reach the input grid.
GB5945/36A 1935-03-27 1936-02-27 Improvements in signal-translating and-modulating systems Expired GB454996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13227A US2042571A (en) 1935-03-27 1935-03-27 Signal translating and modulating system

Publications (1)

Publication Number Publication Date
GB454996A true GB454996A (en) 1936-10-12

Family

ID=21758890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5945/36A Expired GB454996A (en) 1935-03-27 1936-02-27 Improvements in signal-translating and-modulating systems

Country Status (2)

Country Link
US (1) US2042571A (en)
GB (1) GB454996A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416302A (en) * 1941-01-07 1947-02-25 Bell Telephone Labor Inc Electronic apparatus
US2456029A (en) * 1942-07-30 1948-12-14 Rca Corp Thermionic tube circuits
US2581966A (en) * 1947-02-14 1952-01-08 Motorola Inc Tuner
US2653224A (en) * 1949-04-29 1953-09-22 Rca Corp Frequency converter system

Also Published As

Publication number Publication date
US2042571A (en) 1936-06-02

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