US2145356A - Heterodyne receiver - Google Patents

Heterodyne receiver Download PDF

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Publication number
US2145356A
US2145356A US103094A US10309436A US2145356A US 2145356 A US2145356 A US 2145356A US 103094 A US103094 A US 103094A US 10309436 A US10309436 A US 10309436A US 2145356 A US2145356 A US 2145356A
Authority
US
United States
Prior art keywords
electrode
circuit
cathode
tube
grid
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
US103094A
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English (en)
Inventor
Jonker Johan Lodewijk Hendrik
Adrianus Johannes Wilhel Marie
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.)
Koninklijke Philips NV
Original Assignee
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of US2145356A publication Critical patent/US2145356A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
    • H01J43/025—Circuits therefor
    • 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

Definitions

  • This invention has reference to an electric discharge tube and to a heterodyne circuit comprising such a tube.
  • a construction is devised by means of which a substantial increase in mutual conductance of the tube can be obtained and in which not so much the dimensions of the electrodes as the properties of the surface of given electrodes are used as a starting point.
  • an electric discharge tube comprising an electrode system including an apertured anode is provided, and on the side of this anode remote from the cathode, there is provided an electrode the surface of which has such properties that when the tube is in use secondary electrons are evolved from it.
  • the surface of this electrode is, preferably, coated with a substance readily emitting electrons, such for example as Preferably, this separate electrode has applied to it a positive voltage which is generally lower than the voltage of the anode; for this purpose this electrode may, for example, be connected to the screening grid.
  • the electrode that emits secondary electrons is arranged directly behind the anode it is also possible to arrange between this electrode and the anode a regulating grid permitting of regulating the number of secondary electrons reaching the anode.
  • a discharge tube of the kind here described is used as a mixing tube in a circuit.
  • the secondary emission electrode may serve jointly with the said regulating grid for generating the local oscillations.
  • the secondary emission electrode between which electrode and the oathode a negative resistance occurs can serve alone as a local oscillator.
  • a discharge tube according to the present invention is not only adapted for use as a mixing tube but in many other circuit arrangements, for example, as an amplifier.
  • Figs. 1 and 2 show respectively a front view in perspective and a plan view of a discharge tube according to the present invention, the tube envelope in each case being partially removed to show the electrode arrangement.
  • Fig. 3 discloses an amplifying circuit utilizing the discharge tube shown in Figs. 1 and 2.
  • Fig. 4 discloses a mixing or heterodyne circuit utilizing the same tube
  • Fig. 5 discloses a mixing or heterodyne circuit utilizing a modified form of tube.
  • I designates the wall of the tube which is provided at the bottom with a base 2 comprising connecting members 3.
  • an electrode system comprising a cathode 4, in the present case an indirectly heated cathode, a control grid 5, a screening grid 6, a wire-shaped anode 1 and an electrode 8 emitting secondary electrons.
  • the various electrodes are supported at the top and maintained at the correct relative spacing by a mica plate 9. All the electrodes are connected to current supply members which are taken out through the press (not shown) except for the leading-in wire for the control grid which is taken through the top of the bulb at H).
  • Figure 3 shows an amplifier circuit in which a discharge tube according to the invention is used.
  • the oscillations to be amplified are supplied to the grid 5 and the amplified oscillations occur between the anode 1 and the cathode.
  • an electrode 8 which has a positive voltage relatively to the-cathode and emits secondary electrons material amplification is obtained.
  • Fig. 4 shows a circuit arrangement in which a discharge tube according to the invention is used as a mixing tube
  • Fig. 5 shows a circuit arrangement of. this kind in which a regulating grid H is interposed between the anode and the secondary emission electrode.
  • the arrangement comprises an input circuit l2 which is connected between the cathode 4 and the first or signal control grid 5, an oscillatory circuit l3 which is connected between the secondary emission plate electrode 8 and an intermediate point of the high potential source, and the load or output circuit M which is tuned to the difference or intermediate frequency connected between the perforate output electrode 7 and the high potential source.
  • the circuit of Fig. 5 differs from that of Fig.
  • an auxiliary electrode II which serves to control the secondary emission from plate 8 has connected to it a coil l5 which is inductively coupled to :the coil of the oscillatory circuit I 3.
  • the electrodes II and 8 are shown connected to the same source of dc potential.
  • an electron discharge tube having a cathode, a signal control grid, an apertured anode, a second grid and a fifth electrode arranged in the order named, said fifth electrode: having its interior surface formed of a material which readily emits electrons, a circuit tuned to a desired signal frequency connected between said signal control grid and cathode, an output circuit tuned to the intermediate frequency connected to said apertured anode, a parallel resonant circuit tuned to a local oscillation frequency connected to said fifth electrode and cathode, and a circuit connected to said second grid and including a feedback connection to said last named resonant circuit.
  • an electron discharge tube having a cathode, a signal control grid, ananode formed vof spaced apart turns, a second grid and a fifth electrode arranged in the order named, said fifth electrode having its interior surface formed of electron emitting material, a circuit adjustably resonant to a desired signal frequency connected between said signal control grid and cathode, an output circuit tuned to the intermediate frequency connected to said anode, a parallel resonant circuit including a coil tuned to a local oscillation frequency connected to said fifth electrode and a circuit connected to said second grid and including a coil inductively coupled to the coil of said parallel resonant circuit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Lasers (AREA)
  • Electron Sources, Ion Sources (AREA)
US103094A 1935-10-04 1936-09-29 Heterodyne receiver Expired - Lifetime US2145356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL466929X 1935-10-04

Publications (1)

Publication Number Publication Date
US2145356A true US2145356A (en) 1939-01-31

Family

ID=19786432

Family Applications (1)

Application Number Title Priority Date Filing Date
US103094A Expired - Lifetime US2145356A (en) 1935-10-04 1936-09-29 Heterodyne receiver

Country Status (5)

Country Link
US (1) US2145356A (en(2012))
BE (1) BE417742A (en(2012))
FR (1) FR811591A (en(2012))
GB (1) GB466929A (en(2012))
NL (1) NL50084C (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798903A (en) * 1951-03-16 1957-07-09 Henry M Spencer Signal amplification system
US2907880A (en) * 1955-04-14 1959-10-06 Philips Corp Circuit-arrangement for measuring voltages

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2798903A (en) * 1951-03-16 1957-07-09 Henry M Spencer Signal amplification system
US2907880A (en) * 1955-04-14 1959-10-06 Philips Corp Circuit-arrangement for measuring voltages

Also Published As

Publication number Publication date
GB466929A (en) 1937-06-08
BE417742A (en(2012))
NL50084C (en(2012))
FR811591A (fr) 1937-04-17

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