US2246958A - Rectifying arrangement for ultra short waves - Google Patents

Rectifying arrangement for ultra short waves Download PDF

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Publication number
US2246958A
US2246958A US208570A US20857038A US2246958A US 2246958 A US2246958 A US 2246958A US 208570 A US208570 A US 208570A US 20857038 A US20857038 A US 20857038A US 2246958 A US2246958 A US 2246958A
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US
United States
Prior art keywords
grid
cathode
oscillations
anode
circuit
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 - Lifetime
Application number
US208570A
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English (en)
Inventor
Strutt Maximiliaan Julius Otto
Ziel Aldert Van Der
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RCA Corp
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RCA Corp
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Filing date
Publication date
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/26—Demodulation of amplitude-modulated oscillations by means of transit-time tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/14—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles
    • H03D1/16—Demodulation of amplitude-modulated oscillations by means of non-linear elements having more than two poles of discharge tubes
    • 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
    • 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
    • H03D7/20—Transference of modulation from one carrier to another, e.g. frequency-changing by means of transit-time tubes

Definitions

  • This invention relates to a rectifying arrangement for ultra-short waves comprising a discharge tube with at least two grids placed between the anode and the cathode.
  • the present invention has for its object to provide a rectifying arrangement for ultra-short waves, in which the oscillatory circuit preceding the rectifier is damped only to a very small deree.
  • the oscillations to be rectified are supplied to the negatively or slightly positively biassed anode of a discharge tube and the connection of one of the grids of this tube to the cathode includes a high impedance to the rectified oscillations, a positively biassed grid being interposed between this grid and the anode.
  • the ultrahigh frequency oscillations to be rectified which occur in the oscillatory circuit I are supplied to the negatively biassed xanode 3 of a discharge tube 2, which in addition to the anode comprises two grids 4 and 5and a cathode 6.
  • a positive bias is supplied to the grid 4, whilst the grid is high-frequency earthed by a condenser 8 constituting a short-circuit to the oscillations to be rectified.
  • the end of the oscillatory circuit I remote from the anode 3 is connected across a condenser 9 to the cathode and across a resistance ID to a source of negative bias.
  • connection of the grid 5 to the cathode 6 includes a high impedance to the rectified oscillations which consists of the parallel-connection of a resistance I I and of a condenser I2 constituting a short-circuit to high frequencies.
  • the rectified oscillations are taken off from the resistance II through a coupling condenser I 3.
  • the rectifying arrangement according to the invention may also be used with success as a mixing stage with superheterodyne receivers Figs. 4 and 5 representing two circuit arrangements in which this is carried into effect.
  • the received high frequency oscillations occurring in the circuit I6 together with the locally generated oscillations occurring in the circuit I! are supplied to the anode 3.
  • the current flowing to the grid 5 comprises an intermediate frequency component which is sieved out by means of the oscillatory circuit I8 tuned to the intermediate frequency.
  • the outer circuit of the grid 4 comprises another oscillatory circuit I9 for obtaining additional amplification.
  • the desired negative bias of the anode 3 is obtained by the direct voltage drop in the resistance 22.
  • These two screen grids are preferably directly connected together and are earthed to high frequencies through a condenser 2i, whereas the required positive bias is supplied through the resistance 20.
  • the arrangements according to the invention yield an extremely strOng rectification if the time between the first and the second passage of the electrons through the grid 4 is on an average equal to one-half cycle of the oscillations to be rectified. However, it is essential only that the said time is of the same order of magnitude as the cycle of the oscillations to be rectified.
  • a circuit for the rectification of ultra-short oscillations comprising an electron discharge tube provided with an anode, a cathode and at least two grids interposed therebetween, means for impressing the oscillations to be rectified between only the anode and cathode, a high impedance across which the rectified oscillations are developed connected only between one of the tube provided with an anode, a cathode and at least two grids interposed therebetween, means for impressing the oscillations to be rectified between only the anode and cathode, a high impedance across which the rectified oscillations are developed connected only between one of the grids and the cathode, means coupled to said high impedance for taking off the rectified oscillations, and means for maintaining the second grid positively biased with respect to the oathode.
  • a circuit for the rectification of ultra-short oscillations comprising an electron discharge tube provided with an anode, a cathode and at least two grids interposed therebetween, means for impressing the oscillations to be rectified between only the anode and cathode, a high impedance across which the rectified oscillations are developed connected only between one of the grids and the cathode, means for maintaining the second grid positively biased with respect to the cathode, a second high impedance connected to the positively biased grid, an means coupled to said last impedance for taking off the rectified oscillations in amplified form.
  • a circuit for the rectification of ultra-short oscillations comprising an electron discharge tube provided with an anode, a cathode and at least two grids interposed therebetween, means for maintaining the anode at a negative potential with respect to the cathode, means for impressing the oscillations to be rectified between only the anode and cathode, a high impedance across which the rectified oscillations are developed connected only between the cathode and the grid next adjacent thereto, and means for maintaining the second grid positively biased with respect to the cathode.
  • a combined detector-amplifier circuit for the rectification and amplification of ultra-short oscillations comprising an electron discharge tube provided with an anode. a cathode and at least two grids interposed therebetween, means for maintaining the anode at a negative potential with respect to the cathode, means for impressing the oscillations to be rectified between only the anode and cathode, a high impedance, across which the rectified oscillations are developed connected only between the cathode and the grid next adjacent thereto, means for maintaining the second grid positively biased with respect to the cathode, a second highimpedance connected to the second grid, the cathode, first and second grids constituting the electrodes of an amplifier, the rectified oscillations developed across the first impedance appearing in, amplified form across the second impedance by reason of said amplifying action.
  • a circuit for mixing received signal oscillations and locally produced oscillations for obtaining an intermediate frequency comprising an electron discharge tube provided with an anode, a cathode and a plurality of grids interposed therebetween, means for impressing the received oscillations between only the cathode and anode, means for impressing the locally produced oscillations between cathode and one other electrode of said tube, and an oscillatory circuit tuned to the intermediate frequency connected between cathode and the grid next adjacent the cathode.
  • a circuit for mixing received high frequency signal oscillations and locally produced oscillations for obtaining an intermediate frequency comprising an electron discharge tube provided with an anode, a cathode and a plurality of grids interposed therebetween,
  • means for maintaining the anode at a. negative potential with respect to the cathode means for impressing the received oscillations between cathode and anode, means for impressing the cally produced oscillations between cathode and one other electrode of the tube, an oscillatory circuit tuned to the intermediate frequency connected between cathode and the grid next adjacent the cathode, and a positively biased grid interposed between the anode and the grid next adjacent the cathode.
  • a circuit for mixing received ultra-short signal oscillations and locally produced oscillations for obtaining an intermediate frequency comprising an electron discharge tube provided with an anode, a cathode and a plurality of grids interposed therebetween, means for maintaining the anode at a negative potential with respect to the cathode, means for impressing both the received oscillations and the locally produced oscillations between cathode and anode, an oscillatory circuit tuned to the intermediate frequency connected between cathode and the grid next adjacent the cathode, a second similar oscillatory circuit connected to one of grids between the first grid and anode, and a positively biased shield grid having one part interposed between the last mentioned grid and the anode and another part interposed between said last mentioned grid and the grid next adjacent the cathode.
  • a circuit for mixing received ultra-short signal oscillations and locally produced oscillations for obtaining an intermediate frequency comprising an electron discharge tube provided with an anode, a cathode and a plurality of grids interposed therebetween, means for maintaining the anode at a negative potential with respect to the oathode, means for impressing the received oscillations between cathode and anode, means for impressing the locally produced oscillations between cathode and the grid next adjacent the cathode, an oscillatory circuit tuned to the intermediate frequency connected between cathode and.
  • a second similar oscillatory circuit connected to one of grids between the first grid and anode, and a positively biased shield grid havingone part interposed between the last mentioned grid and the anode and another part interposed between said last mentioned grid and the grid next adjacent the cathode.
  • a circuit for mixing received ultra-short signal oscillations and locally produced oscillations for obtaining an intermediate frequency comprising an electron discharge tube provided with a cathode, a plurality of grids and an anode positioned in the order named, means for impressing the received oscillations between cathode and anode, means for impressing the locally produced oscillations between cathode and one other electrode of said tube, an oscillatory circuit tuned to the intermediate frequency connected between cathode and the first grid, a similar oscillatory circuit connected to the third grid, and means for maintaining the second and fourth grids at a positive potential with respect to the cathode.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Superheterodyne Receivers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
US208570A 1937-07-10 1938-05-18 Rectifying arrangement for ultra short waves Expired - Lifetime US2246958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE501890X 1937-07-10

Publications (1)

Publication Number Publication Date
US2246958A true US2246958A (en) 1941-06-24

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ID=6545821

Family Applications (1)

Application Number Title Priority Date Filing Date
US208570A Expired - Lifetime US2246958A (en) 1937-07-10 1938-05-18 Rectifying arrangement for ultra short waves

Country Status (5)

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US (1) US2246958A (en(2012))
BE (1) BE429060A (en(2012))
FR (1) FR840536A (en(2012))
GB (1) GB501890A (en(2012))
NL (1) NL54608C (en(2012))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611093A (en) * 1944-09-02 1952-09-16 Hartford Nat Bank & Trust Co Mixing circuit
US2629821A (en) * 1945-06-07 1953-02-24 La Verne R Philpott High-frequency signal translation circuit
US2904680A (en) * 1954-06-14 1959-09-15 Du Mont Allen B Lab Inc Retriggered direct coupled sweep circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2611093A (en) * 1944-09-02 1952-09-16 Hartford Nat Bank & Trust Co Mixing circuit
US2629821A (en) * 1945-06-07 1953-02-24 La Verne R Philpott High-frequency signal translation circuit
US2904680A (en) * 1954-06-14 1959-09-15 Du Mont Allen B Lab Inc Retriggered direct coupled sweep circuit

Also Published As

Publication number Publication date
BE429060A (en(2012))
GB501890A (en) 1939-03-07
NL54608C (en(2012))
FR840536A (fr) 1939-04-27

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