GB197405A - Improvements in or relating to receiving arrangements for electromagnetic waves - Google Patents

Improvements in or relating to receiving arrangements for electromagnetic waves

Info

Publication number
GB197405A
GB197405A GB407822A GB407822A GB197405A GB 197405 A GB197405 A GB 197405A GB 407822 A GB407822 A GB 407822A GB 407822 A GB407822 A GB 407822A GB 197405 A GB197405 A GB 197405A
Authority
GB
United Kingdom
Prior art keywords
circuit
coil
valve
frequency
aerial
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
GB407822A
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.)
THOMAS HILARY KINMAN
Original Assignee
THOMAS HILARY KINMAN
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 THOMAS HILARY KINMAN filed Critical THOMAS HILARY KINMAN
Priority to GB407822A priority Critical patent/GB197405A/en
Publication of GB197405A publication Critical patent/GB197405A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

197,405. Kinman, T. H. Feb. 11, 1922. Thermionic heterodyne receivers.-A self-heterodyne detector valve is arranged to produce supersonic resultant oscillations or beats, and the circuits are designed to render the self-oscillation frequency independent of the received frequency. As shown in Fig. 1, the aerial is coupled to an oscillatory circuit 11, 12 tuned to the incoming frequency and connected between the grid and filament of the valve, 6. A circuit 13, 14 tuned to the local frequency is connacted to the valve anode and is coupled to a coil 7 in the grid circuit. Supersonic resultant occillations, which may be of higher frequency than the local oscillations, are transferred for amplification and reception by the coupling 8, 15. The inductance 11 is preferably of low value and the capacity 12 high. In a modification the circuit 11, 12 is omitted and the aerial is coupled to the coil 7. The anode coil 8 may be connected in the anode circuit in parallel with the coil 13. The tuned mode circuit 13, 14 may be replaced by a variometer, and the valve may oscillate without external reaction coupling. In the circuit shown in Fig. 2, the grid coupling-coil 7 is arranged in parallel with the aerial inductance. Specifications 137,271 and 162,097 are referred to.
GB407822A 1922-02-11 1922-02-11 Improvements in or relating to receiving arrangements for electromagnetic waves Expired GB197405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB407822A GB197405A (en) 1922-02-11 1922-02-11 Improvements in or relating to receiving arrangements for electromagnetic waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB407822A GB197405A (en) 1922-02-11 1922-02-11 Improvements in or relating to receiving arrangements for electromagnetic waves

Publications (1)

Publication Number Publication Date
GB197405A true GB197405A (en) 1923-05-11

Family

ID=9770309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB407822A Expired GB197405A (en) 1922-02-11 1922-02-11 Improvements in or relating to receiving arrangements for electromagnetic waves

Country Status (1)

Country Link
GB (1) GB197405A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562311A (en) * 1947-04-18 1951-07-31 Bendix Aviat Corp Frequency converter comprising piezoelectric crystal stabilization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562311A (en) * 1947-04-18 1951-07-31 Bendix Aviat Corp Frequency converter comprising piezoelectric crystal stabilization

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